Control method of gas water heater and gas water heater

Abstract

The application discloses a control method of a gas water heater and the gas water heater. The gas water heater comprises a gas heating device, an electric auxiliary heating device and a circulating water pump. The gas water heater at least comprises a preheating state. The control method comprises the following steps: entering the preheating state; the circulating water pump is operated; the electric auxiliary heating device is operated; the electric auxiliary heating device is stopped, the gas heating device is operated; and the gas heating device is stopped. The control method of the gas water heater has the advantages of small noise, stable water temperature and the like.

Description

Technical Field

[0001] This invention relates to the field of electrical manufacturing technology, and more specifically, to a control method for a gas water heater and a gas water heater. Background Technology

[0002] Gas water heaters in related technologies generate significant noise during preheating, which can easily disturb users' rest. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a control method for a gas water heater, which has advantages such as low noise and stable water temperature.

[0004] The present invention also proposes a computer-readable storage medium.

[0005] The present invention also proposes a gas water heater.

[0006] To achieve the above objectives, according to an embodiment of the first aspect of the present invention, a control method for a gas water heater is provided. The gas water heater includes a gas heating device, an electric auxiliary heating device, and a circulating water pump. The gas water heater includes at least a preheating state. The control method includes the following steps: entering the preheating state; the circulating water pump operating; the electric auxiliary heating device operating; the electric auxiliary heating device stopping; the gas heating device operating; and the gas heating device stopping.

[0007] The control method for a gas water heater according to an embodiment of the present invention has advantages such as low noise and stable water temperature.

[0008] In addition, the control method for a gas water heater according to the above embodiments of the present invention may also have the following additional technical features:

[0009] According to one embodiment of the present invention, the gas water heater further includes a water temperature detection device, and the control method further includes: acquiring a target water temperature when entering the preheating state; and after the electric auxiliary heating device is running, stopping the electric auxiliary heating device and running the gas heating device when the sum of the detection value of the water temperature detection device and the predetermined temperature rise is greater than the target water temperature.

[0010] According to one embodiment of the present invention, the predetermined temperature rise is the temperature rise after the water flow completes one full pipeline circulation.

[0011] According to one embodiment of the present invention, the control method further includes: after the gas heating device is in operation, when the detection value of the water temperature detection device is greater than the sum of the predetermined hysteresis temperature and the target temperature, stopping the gas heating device.

[0012] According to one embodiment of the present invention, the gas water heater further includes an antifreeze state, and the control method includes the following steps: entering the antifreeze state; the circulating water pump operating; and the electric auxiliary heating device operating.

[0013] According to one embodiment of the present invention, the gas water heater further includes an ambient temperature detection device, and the control method further includes: when the detection value of the ambient temperature detection device is less than a predetermined freezing temperature, controlling the gas water heater to enter the antifreeze state.

[0014] According to one embodiment of the present invention, the gas water heater further includes a water temperature detection device, and the control method further includes: stopping the circulating water pump and the electric auxiliary heating device when the detection value of the water temperature detection device is greater than a predetermined thawing temperature.

[0015] According to one embodiment of the present invention, the gas water heater further includes an ambient temperature detection device, and the gas water heater also includes a water usage state. The control method further includes: entering the water usage state; when the detection value of the ambient temperature detection device is greater than a predetermined summer temperature, the electric auxiliary heating device operates and the gas heating device stops; when the detection value of the ambient temperature detection device is less than a predetermined winter temperature, the electric auxiliary heating device and the gas heating device operate simultaneously.

[0016] According to one embodiment of the present invention, the gas water heater further includes a flow control device and a water flow sensor, and the gas water heater further includes a water usage state, the control method including the following steps to enter the water usage state;

[0017] When the water flow sensor detects that the water flow has stopped, the flow control device reduces the outflow rate.

[0018] According to an embodiment of the present invention, the control method includes: entering the water usage state; when the water flow sensor detects that the water flow has stopped, the flow control device reduces the outflow rate; when the water flow sensor detects that the water flow is flowing, the electric auxiliary heating device is activated.

[0019] According to an embodiment of the present invention, the control method includes: entering the water usage state; when the water flow sensor detects that the water flow has stopped, the flow control device reduces the outflow rate; when the water flow sensor detects that the water flow is flowing, the electric auxiliary heating device is activated; after a predetermined time, the flow control device increases the outflow rate.

[0020] According to one embodiment of the present invention, the circulating water pump is connected between the water inlet of the gas heating device and the electric auxiliary heating device.

[0021] According to an embodiment of a second aspect of the present invention, a computer-readable storage medium is provided thereon storing a computer program that, when executed by a processor, implements the control method for a gas water heater as described in an embodiment of the first aspect of the present invention.

[0022] The computer-readable storage medium according to embodiments of the present invention, by utilizing the control method for a gas water heater according to the first aspect of the present invention, has advantages such as reducing gas water heater noise and improving water temperature stability.

[0023] According to a third aspect of the present invention, a gas water heater is provided, wherein the gas water heater applies the control method for a gas water heater described in the first aspect of the present invention.

[0024] The gas water heater according to the embodiments of the present invention, by utilizing the control method of the gas water heater described in the first aspect of the present invention, has advantages such as low noise and stable water temperature.

[0025] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0027] Figure 1 This is a schematic diagram of the structure of a gas water heater according to an embodiment of the present invention.

[0028] Figure 2 This is a schematic diagram of the structure of the electric auxiliary heating device of a gas water heater according to an embodiment of the present invention.

[0029] Figure 3 This is a schematic diagram of the structure of the electric auxiliary heating device of a gas water heater according to an embodiment of the present invention.

[0030] Figure 4 This is a schematic diagram of the structure of the insulating shell of the electric auxiliary heating device of a gas water heater according to an embodiment of the present invention.

[0031] Figure 5 This is a partial structural schematic diagram of a gas water heater according to an embodiment of the present invention.

[0032] Figure 6 This is a schematic diagram of the water inlet connector of a gas water heater according to an embodiment of the present invention.

[0033] Figure 7 This is a schematic diagram of the structure of a gas water heater according to an embodiment of the present invention.

[0034] Figure 8 This is a cross-sectional view of the flow control device of a gas water heater according to an embodiment of the present invention.

[0035] Figure 9 This is a flowchart of a control method for a gas water heater according to an embodiment of the present invention.

[0036] Figure 10 This is a flowchart of a control method for a gas water heater according to an embodiment of the present invention.

[0037] Figure 11 This is a flowchart of a control method for a gas water heater according to an embodiment of the present invention.

[0038] Figure 12 This is a flowchart of a control method for a gas water heater according to an embodiment of the present invention.

[0039] Reference numerals: Gas water heater 1, Electric auxiliary heating device 100, Shell 110, Water storage chamber 111, Water inlet connector 112, Upper shell 114, Lower shell 115, Welded lap edge 116, Heating element 120, Terminal block 130, Insulating shell 140, Snap-fit ​​groove 141, Cable outlet 142, Threaded hole 143, Thermostat 150, Water inlet connector 200, Water flow channel 201, Annular groove 202, Flange 203, Thread 204, Lug 20 5. Power control device 210, heat exchange surface 211, cooling hole 212, positioning groove 213, mounting base 214, temperature detection device 220, mounting hole 221, pressure plate 230, fixing hole 231, flow control device 300, on / off valve 310, water flow sensor 320, flow limiting ring 330, pipe body 340, water outlet 341, normally open flow channel A, regulating flow channel B, circulating water pump 400, gas heating device 500, outer shell 600. Detailed Implementation

[0040] This application is based on the inventor's discoveries and understanding of the following facts and problems:

[0041] Gas water heaters in related technologies rely solely on burners to heat water. In winter, when ambient temperatures are low, it's difficult to guarantee sufficient outlet water temperature. Increasing the number of burner burners would lead to a larger size and require a larger gas flow rate. In summer, when ambient temperatures are high, even with the burner operating at minimum power, the outlet water temperature remains quite hot.

[0042] Specifically, the burner burner has an upper and lower limit for its load capacity, which limits the maximum and minimum heat load of the gas water heater.

[0043] If the upper limit of heat load is increased by increasing the number of burners, not only will the volume increase accordingly, but the gas flow rate will also need to be increased. Increasing the gas flow rate requires modifications to the gas facilities, such as replacing the gas meter.

[0044] The minimum heat load of a gas water heater is 3-4 kilowatts. In summer, when the inlet water temperature is high, even when heating at the minimum load, the outlet water temperature is still quite hot.

[0045] Some gas water heaters in related technologies use an additional electric auxiliary heating device to work in conjunction with the burner. In summer, when the inlet water temperature is high, only the electric auxiliary heating is used to compensate for the heating situation where the temperature is below the lower limit of the burner's heat load. In winter, when the inlet water temperature is low, the electric auxiliary heating and gas heating are carried out simultaneously, increasing the upper limit of the heat load of the entire gas water heater, thus increasing the upper limit of the heat load and decreasing the lower limit of the heat load.

[0046] Due to the special working environment inside a gas water heater, condensate is easily generated and comes into contact with the electric auxiliary heating device. To ensure the reliable operation of the electric auxiliary heating device, an insulating shell needs to be installed on it.

[0047] In the related technology, the electric auxiliary heating device of the gas water heater has an insulating protective sleeve that is fitted onto the electric auxiliary heating device by friction. The connection reliability is poor, and the insulating protective sleeve is prone to displacement or even detachment, resulting in insulation protection failure.

[0048] Electric auxiliary heating devices require additional power control devices such as silicon controlled rectifiers to adjust the operating power of the electric auxiliary heating device. However, the power control device itself also generates a lot of heat, which will reduce the lifespan of the power control device in the already high-temperature operating environment of the gas water heater.

[0049] Therefore, some power control devices are installed on the water inlet pipe to cool them down using the cold water in the pipe. However, this requires additional mounting brackets for installing the power control devices on the pipe, which increases the number of assembly steps and parts, affecting production efficiency. Furthermore, installing additional power control devices on the water inlet pipe increases the possibility of leakage.

[0050] Gas water heaters in related technologies generate significant noise during preheating, which can easily disturb users' rest.

[0051] Specifically, in order to achieve the function of instant hot water with zero cold water, gas water heaters need to circulate and preheat the water in the pipes. However, the burner of a gas water heater needs to work with the fan when heating, and it will generate a lot of noise when running at full load, which will affect the user's rest.

[0052] In winter, when the ambient temperature is low, gas water heaters need to circulate and heat the water in the pipes to prevent them from freezing. However, the burner of a gas water heater needs to work with the fan when heating, and it will generate a lot of noise when running at full load. Moreover, the low temperature environment is usually at night, and starting the defrost can easily affect the user's rest.

[0053] Some gas water heaters in related technologies are equipped with an electric auxiliary heating device. During preheating, the electric auxiliary heating device is used for heating while the burner does not run, thus avoiding noise generated by the burner and fan. However, the heating power of the electric auxiliary heating device is not adjustable, and the temperature rise provided after each full pipeline circulation is fixed. After a part of the pipeline reaches the target temperature, heating needs to be stopped to prevent overheating. At this time, there is still some water flow in the pipeline that has not reached the set temperature. When users use water, the water temperature fluctuates greatly, resulting in poor bathing comfort.

[0054] In gas water heaters of the relevant technology, when a user briefly turns off the water to apply shower gel and then turns it back on, the gas heating device needs time to operate for self-checking and ignition. As a result, a section of water in the pipeline will be at a lower temperature and will not be reheated, causing water temperature fluctuations and affecting the user experience.

[0055] In related technologies, gas water heaters with electric heating functions use electric heating devices to supplement heating when the user briefly turns off the water and then turns it back on. This compensates for the heating gap during the self-testing and ignition process of the gas heating device and reduces water temperature fluctuations. However, due to the limited heating power of the electric auxiliary heating device, it is difficult to achieve the same heating efficiency as the gas heating. When the water flow is large, insufficient heating will result in lower water temperature and water temperature fluctuations.

[0056] To address this, some gas water heaters are equipped with water flow regulating valves made of shape memory alloys. These valves utilize the shape memory alloy's ability to deform in response to water temperature, increasing the water flow when the water temperature is high and decreasing it when the water temperature is low. However, the water flow regulation process of shape memory alloys has a certain lag, which can still cause some water temperature fluctuations.

[0057] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0058] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0059] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0060] The electric auxiliary heating device 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0061] like Figures 1-12 As shown, the electric auxiliary heating device 100 according to an embodiment of the present invention includes a housing 110, a heating element 120, a wiring terminal 130, and an insulating shell 140.

[0062] The housing 110 has a water storage chamber 111 inside, and two water inlets 112 communicating with the water storage chamber 111 are provided on the housing 110. The heating element 120 is provided inside the housing 110. The wiring terminal 130 is provided outside the housing 110 and is electrically connected to the heating element 120. The insulating shell 140 is provided with a snap-fit ​​groove 141, which snaps onto at least one of the two water inlets 112 to connect the insulating shell 140 and the housing 110. The insulating shell 140 at least covers the wiring terminal 130.

[0063] According to the electric auxiliary heating device 100 of this invention, by providing auxiliary heating using the electric auxiliary heating device 100, the shortcomings of gas water heaters that only use gas heating devices for heating in related technologies can be overcome. For example, in winter when the ambient temperature is low, the gas heating device and the electric auxiliary heating device 100 work together to increase the upper limit of the heat load of the gas water heater and the upper limit of the outlet water temperature. In summer when the ambient temperature is high, the electric auxiliary heating device 100 is used alone to compensate for heating situations where the load is less than the minimum load of gas heating alone, thereby reducing the lower limit of the heat load of the gas water heater and the lower limit of the outlet water temperature. This can meet the water needs of users under different ambient temperatures and improve user comfort.

[0064] Furthermore, by providing an insulating shell 140 to cover the wiring terminal 130, the insulating shell 140 can prevent the wiring terminal 130 from coming into contact with water, thereby improving the reliability of the electric auxiliary heating device 100.

[0065] Furthermore, by providing a snap-fit ​​groove 141 on the insulating shell 140, and connecting the insulating shell 140 to the housing 110 through the snap-fit ​​groove 141 and the water-passing connector 112, compared with the insulating protective sleeve that is only fitted onto the outside of the housing by friction in related technologies, the connection reliability of the insulating shell 140 can be improved, the insulating shell 140 can be prevented from shifting, the insulating shell 140 can be prevented from detaching from the housing 110, the waterproof protection effect of the wiring terminal 130 can be improved, and the reliability of the electric auxiliary heating device 100 can be further improved. Moreover, during installation, only the snap-fit ​​groove 141 needs to be snapped into the water-passing connector 112. Compared with other connection methods, the insulating shell 140 is easy to install, and the assembly efficiency of the electric auxiliary heating device 100 is high, thereby improving the production efficiency of the electric auxiliary heating device 100.

[0066] Therefore, the electric auxiliary heating device 100 according to the embodiments of the present invention can increase the upper limit of heat load and decrease the lower limit of heat load, and has the advantages of high reliability.

[0067] The electric auxiliary heating device 100 according to a specific embodiment of the present invention is described below with reference to the accompanying drawings.

[0068] In some specific embodiments of the present invention, such as Figures 1-12 As shown, the electric auxiliary heating device 100 according to an embodiment of the present invention includes a housing 110, a heating element 120, a wiring terminal 130, and an insulating shell 140.

[0069] Advantageously, such as Figures 2-4 As shown, the snap-fit ​​groove 141 has an opening, the size of which is smaller than the diameter of the water-passing connector 112 within the snap-fit ​​groove 141. This makes it less likely for the water-passing connector 112 to detach from the snap-fit ​​groove 141, and also makes it less likely for the insulating shell 140 to detach from the housing 110, thereby improving the reliability of the installation of the insulating shell 140.

[0070] Specifically, the two water connectors 112 can have the same diameter. This allows both water connectors 112 to use the same type of part, facilitating parts management and eliminating the need for differentiation during installation, thus simplifying the process.

[0071] Specifically, such as Figure 2 and Figure 3 As shown, the terminal block 130 is located on the upper surface of the housing 110, and one of the two water connectors 112 is located on the lower surface of the housing 110 and the other is located on the circumferential surface of the housing 110. This allows the terminal block 130 and the water connector 112 to be respectively located on different surfaces of the housing 110, which facilitates the arrangement of the terminal block 130 and further avoids contact between the terminal block 130 and water.

[0072] More specifically, such as Figures 2-4 As shown, the insulating shell 140 is fitted onto the upper end of the housing 110, and the snap-fit ​​groove 141 is formed on the peripheral wall of the insulating shell 140. This can further improve the waterproof protection effect of the insulating shell 140 on the wiring terminal 130 and improve the reliability of the electric auxiliary heating device 100.

[0073] Optionally, such as Figures 1-4 As shown, the water inlet 112 located on the lower surface of the housing 110 is used for water inlet. That is, the water inlet 112 located on the periphery of the housing 110 is used for water outlet. This facilitates the connection of the electric auxiliary heating device 100 to the water circuit of the gas water heater.

[0074] Figures 2-4 An electric auxiliary heating device 100 according to some examples of the present invention is shown. For example... Figures 2-4 As shown, the insulating shell 140 is provided with a wire passage 142. This facilitates the connection of wires to the terminal block 130, and makes it easy to connect the terminal block 130 to the circuit inside the gas water heater.

[0075] Advantageously, the edges of the cable passage 142 are rounded or covered with a flexible protective ring. This prevents the edges of the cable passage 142 from abrading the wires, which could lead to electrical connection failure, avoids exposed wires from coming into contact with water and affecting the waterproof effect, and improves the reliability of the electrical connection of the electric auxiliary heating device 100.

[0076] Specifically, such as Figure 4As shown, the insulating shell 140 and the housing 110 are further connected by threaded fasteners. Specifically, the insulating shell 140 has a threaded hole 143, and the housing 110 has a through hole. The insulating shell 140 and the housing 110 are further connected by threaded fasteners that fit within the through hole and the threaded hole 143. This further improves the reliability of the insulating shell 140 installation, enhances the waterproof effect of the insulating shell 140 on the terminal 130, and the engagement of the snap-fit ​​groove 141 with the water-passing connector 112 can position the insulating shell 140, facilitating the alignment of the insulating shell 140 with the housing 110, thereby facilitating the installation of the threaded fasteners and improving the production efficiency of the electric auxiliary heating device 100.

[0077] More specifically, such as Figure 2 and Figure 3 As shown, the housing 110 includes an upper shell 114 and a lower shell 115, which are welded together. This facilitates the connection between the upper shell 114 and the lower shell 115, the formation of the water storage cavity 111, the installation of structures such as the heating element 120 inside the upper shell 114 and the lower shell 115, and improves the sealing performance of the housing 110.

[0078] Specifically, such as Figure 2 and Figure 3 As shown, one of the upper shell 114 and the lower shell 115 has a welded lap edge 116 that overlaps the outer peripheral surface of the other. This facilitates the welding of the upper shell 114 and the lower shell 115 and improves the sealing performance of the upper shell 114 and the lower shell 115.

[0079] In other embodiments, the housing 110 may also include a main tube and two end caps, which respectively seal both ends of the main tube. This also facilitates the formation of the water storage cavity 111 and the installation of internal structures such as the heating element 120.

[0080] Furthermore, the water-pass connector 112 is welded to the housing 110. This facilitates the connection between the water-pass connector 112 and the housing 110, and also improves the sealing performance between the water-pass connector 112 and the housing 110.

[0081] Specifically, the housing 110 has an opening with a flange along its edge, and the flange is welded to the water connector 112. This facilitates the welding of the water connector 112 and further improves the sealing between the water connector 112 and the housing 110.

[0082] Optionally, such as Figure 2 As shown, the heating element 120 is a spiral coil with heating wires running through it. This increases the contact area between the heating element 120 and the water in the water storage chamber 111, thereby improving the heating efficiency of the heating element 120.

[0083] Figure 2An electric auxiliary heating device 100 according to some examples of the present invention is shown. For example... Figure 2 As shown, the electric auxiliary heating device 100 also includes a temperature controller 150, which is mounted on the housing 110 and covered by an insulating shell 140. Specifically, the temperature controller 150 is located on the upper surface of the housing 110. This facilitates the detection and adjustment of the heating temperature of the heating element 120 using the temperature controller 150, and the insulating shell 140 protects the temperature controller 150, improving its waterproof protection and enhancing the reliability of the electric auxiliary heating device 100.

[0084] Specifically, such as Figure 2 As shown, terminal block 130 includes a grounding terminal and two electrode terminals. This facilitates the connection of the electric auxiliary heating device 100 to the power supply and ground.

[0085] Advantageously, such as Figure 1 As shown, the electric auxiliary heating device 100 is connected to the water inlet of the gas water heater. Specifically, the water inlet connector 112 at the lower end of the electric auxiliary heating device 100 is directly connected to the water inlet connector 200 of the gas water heater 1. The water inlet connector 200 protrudes from the outer casing 600 of the gas water heater 1 and is used to connect to an external water source pipe. Compared to the technical solution where the electric auxiliary heating device 100 is located at the water outlet, the water heated by the gas heating device will not pass through the electric auxiliary heating device 100, which can prevent hot water from affecting the service life of the electric auxiliary heating device 100 and slow down the rate of scale accumulation inside the electric auxiliary heating device 100.

[0086] The following describes a gas water heater 1 according to an embodiment of the present invention. The gas water heater 1 according to an embodiment of the present invention includes an electric auxiliary heating device 100 according to the above embodiment of the present invention.

[0087] The gas water heater 1 according to an embodiment of the present invention has the advantages of high upper limit of heat load, low lower limit of heat load, and high reliability by utilizing the electric auxiliary heating device 100 according to the above embodiment of the present invention.

[0088] The following description, with reference to the accompanying drawings, describes a gas water heater 1 according to an embodiment of the present invention.

[0089] like Figures 1-12 As shown, the gas water heater 1 according to an embodiment of the present invention includes an electric auxiliary heating device 100, a gas heating device 500, a power control device 210, and a water inlet connector 200.

[0090] The power control device 210 is electrically connected to the electric auxiliary heating device 100. The water inlet connector 200 is suitable for connecting to the water inlet pipe. The water inlet connector 200 has a water flow channel 201 inside. A heat exchange surface 211 is formed on the water inlet connector 200. The power control device 210 is installed on the heat exchange surface 211.

[0091] According to an embodiment of the present invention, the gas water heater 1, by providing an electric auxiliary heating device 100, can overcome the shortcomings of gas water heaters in related technologies that only use a gas heating device for heating. For example, in winter when the ambient temperature is low, the gas heating device 500 and the electric auxiliary heating device 100 work together to increase the upper limit of the heat load of the gas water heater and the upper limit of the outlet water temperature. In summer when the ambient temperature is high, the electric auxiliary heating device 100 can be used alone to compensate for heating conditions below the minimum load of gas heating alone, thereby lowering the lower limit of the heat load of the gas water heater and the lower limit of the outlet water temperature. This can meet the water needs of users under different ambient temperatures and improve user comfort.

[0092] Furthermore, by setting up a power control device 210, the heating power of the electric auxiliary heating device 100 can be controlled by the power control device 210, thereby facilitating the adjustment of the heating power of the electric auxiliary heating device 100, further refining the heating load of the gas water heater 1, achieving a more flexible heating effect, and further improving the user's comfort during use.

[0093] Furthermore, by providing a heat exchange surface 211 on the water inlet connector 200 and mounting the power control device 210 on the heat exchange surface 211, heat exchange can be generated between the cold water flowing through the water inlet connector 200 and the power control device 210 through the heat exchange surface 211. The cold water flowing through the water inlet connector 200 is used to cool the power control device 210 which generates heat during operation, thereby reducing the temperature of the power control device 210 and improving its service life.

[0094] Furthermore, since the power control device 210 is located on the inlet connector 200, compared to the related technology where the power control device is located on the pipeline, there is no need to set up a separate structure for installing the power control device 210. This reduces the number of parts, lowers the cost of parts, improves the integration of the gas water heater 1, makes the internal structure of the gas water heater 1 more compact, reduces the number of connection points inside the gas water heater 1, reduces the possibility of leakage, and improves the sealing reliability of the gas water heater 1. Moreover, during installation, the power control device 210 can be installed on the inlet connector 200 first, and then the power control device 210 and the inlet connector 200 can be installed together inside the gas water heater 1, which simplifies the assembly process of the gas water heater 1 and improves the production efficiency of the gas water heater 1.

[0095] Therefore, the gas water heater 1 according to the embodiments of the present invention has advantages such as comfortable use, long life, low cost, high production efficiency, and high reliability.

[0096] The following description, with reference to the accompanying drawings, describes a gas water heater 1 according to a specific embodiment of the present invention.

[0097] In some specific embodiments of the present invention, such as Figures 1-12 As shown, the gas water heater 1 according to an embodiment of the present invention includes an electric auxiliary heating device 100, a gas heating device 500, a power control device 210, and a water inlet connector 200.

[0098] Specifically, the power control device 210 is a silicon controlled rectifier (SCR). This facilitates the control of the power of the relatively high-power electric auxiliary heating device 100.

[0099] Advantageously, such as Figure 5 and Figure 6 As shown, cooling holes 212 are formed on the heat exchange surface 211, and the cooling holes 212 are connected to the water flow channel 201. The power control device 210 covers the cooling holes 212. Specifically, the power control device 210 has a mounting base 214, which covers the cooling holes 212. In this way, the water flowing through the water inlet connector 200 can contact the power control device 210 directly for cooling, improving the cooling effect of the power control device 210 and further extending its service life.

[0100] More advantageously, a sealing ring is clamped between the power control device 210 and the heat exchange surface, and the sealing ring is arranged around the cooling hole 212. This can improve the sealing performance at the cooling hole 212 and prevent water leakage at the cooling hole 212.

[0101] Furthermore, such as Figure 6 As shown, the heat exchange surface 211 is provided with a positioning groove 213 surrounding the cooling hole 212, and the sealing ring is fitted into the positioning groove 213. In this way, the positioning groove 213 can be used to position the sealing ring, which facilitates the setting of the sealing ring, improves the stability of the sealing ring, and prevents the sealing ring from shifting and affecting the sealing performance.

[0102] More specifically, such as Figure 5 and Figure 6 As shown, the power control device 210 and the heat exchange surface 211 are connected by threaded fasteners. Specifically, both the mounting base 214 and the heat exchange surface 211 are provided with screw holes, and the mounting base 214 and the heat exchange surface 211 are connected by threaded fasteners that fit into the screw holes. This improves the reliability and stability of the connection between the power control device 210 and the heat exchange surface 211, and also facilitates the clamping of the sealing ring between the power control device 210 and the heat exchange surface 211, thereby improving the sealing performance between them.

[0103] Figure 5 and Figure 6 A gas water heater 1 according to some examples of the present invention is shown. For example... Figure 5 and Figure 6As shown, the water inlet connector 200 is provided with a mounting hole 221, and a temperature detection device 220 is fitted inside the mounting hole 221. Specifically, the mounting hole 221 is connected to the water flow channel 201, and the temperature detection device 220 extends into the water flow channel 201. This facilitates the installation of the temperature detection device 220, makes it easier for the temperature detection device 220 to detect the water temperature, and improves the accuracy and reliability of the water temperature detection.

[0104] Specifically, such as Figure 5 and Figure 6 As shown, the water inlet connector 200 is provided with a fixing hole 231. The temperature detection device 220 is installed in the mounting hole 221 through a pressure plate 230. The pressure plate 230 is installed on the water inlet connector 200 through a threaded fastener that fits in the fixing hole 231. This facilitates pressing the temperature detection device 220 into the mounting hole 221, improving the stability and reliability of the installation of the temperature detection device 220, and also facilitates improving the sealing between the temperature detection device 220 and the mounting hole 221.

[0105] Figures 1-3 , Figure 5 and Figure 6 A gas water heater 1 according to some examples of the present invention is shown. For example... Figure 1 As shown, the electric auxiliary heating device 100 is connected between the water inlet and the water inlet connector 200 of the gas heating device 500. Compared with the technical solution where the electric auxiliary heating device 100 is located at the water outlet of the gas heating device 500, the water heated by the gas heating device will not pass through the electric auxiliary heating device 100, which can prevent hot water from affecting the service life of the electric auxiliary heating device 100 and slow down the rate of scale accumulation inside the electric auxiliary heating device 100.

[0106] Specifically, such as Figures 1-3 As shown, the lower surface of the electric auxiliary heating device 100 is provided with a water inlet connector 112, and the upper end of the water inlet connector 200 is fitted into the water inlet connector 112. This facilitates the water circuit connection between the electric auxiliary heating device 100 and the water inlet connector 200.

[0107] Advantageously, a sealing ring is fitted between the outer circumferential surface of the water inlet connector 112 and the inner circumferential surface of the water inlet connector 112. This improves the sealing performance between the electric auxiliary heating device 100 and the water inlet connector 200.

[0108] More specifically, such as Figure 5 and Figure 6 As shown, the outer circumferential surface of the water inlet connector 200 is provided with an annular groove 202, and the sealing ring fits into the annular groove 202. This allows the sealing ring to be positioned using the annular groove 202, facilitating its installation and improving its stability, thus preventing displacement and ensuring a proper seal.

[0109] Furthermore, such as Figure 5 and Figure 6 As shown, both the outer circumferential surface of the water inlet connector 200 and the outer circumferential surface of the water outlet connector 112 are provided with flanges 203, and the two flanges 203 fit together. Specifically, the two flanges 203 can be connected by snap rings and / or pins. This facilitates the connection between the water inlet connector 200 and the electric auxiliary heating device 100.

[0110] More specifically, such as Figure 5 and Figure 6 As shown, the outer circumferential surface of the water inlet connector 200 is provided with a thread 204, and the water inlet connector 200 is connected to the water source inlet pipe through the thread 204. This facilitates the connection between the water inlet connector 200 and the water source inlet pipe.

[0111] Furthermore, such as Figure 1 , Figure 5 and Figure 6 As shown, the gas water heater 1 also includes a housing 600, and the water inlet connector 200 is provided with a lug 205, which is connected to the housing 600 by a threaded fastener. This facilitates the installation of the water inlet connector 200 on the housing 600.

[0112] The control method of a gas water heater according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0113] like Figures 1-12 As shown, the gas water heater 1 includes a gas heating device 500, an electric auxiliary heating device 100, and a circulating water pump 400. The gas water heater 1 includes at least a preheating state.

[0114] like Figure 9 As shown, the control method includes the following steps:

[0115] Entering the preheating state;

[0116] The circulating water pump is running at 400.

[0117] The electric auxiliary heating device is 100% operational.

[0118] The electric auxiliary heating device 100 stops, and the gas heating device 500 starts;

[0119] Gas heating device 500 stops.

[0120] According to the control method of the gas water heater of the present invention, by setting an electric auxiliary heating device 100, the water is first heated by the electric auxiliary heating device 100 in the preheating state, and then the gas heating device 500 is used for heating after the water has been heated to a certain degree. Compared with the technical solution of preheating by using gas heating, the electric auxiliary heating device 100 operates with lower noise. The electric auxiliary heating device 100 is used to heat the water to a certain temperature first, and then the gas heating device 500 is used to heat the water to the target temperature at a low power. This avoids the gas heating device heating at full load, which can reduce the noise generated by the gas water heater 1 in the entire preheating state and prevent the noise generated in the preheating stage from affecting the user's rest.

[0121] Furthermore, by first heating the water to a certain temperature using the electric auxiliary heating device 100, and then heating it to the target temperature using the gas heating device 500, compared to relying entirely on electric auxiliary heating to reach the target temperature, the problem of some water in the pipeline reaching the target temperature while others do not, due to the fixed temperature rise after each full pipeline circulation caused by electric auxiliary heating alone, can be avoided. This prevents uneven water temperature in the pipeline and makes the outlet water temperature of the gas water heater 1 more uniform and stable, improving the user's comfort.

[0122] Therefore, the control method for a gas water heater according to embodiments of the present invention has advantages such as low noise and stable water temperature.

[0123] The following describes a control method for a gas water heater according to a specific embodiment of the present invention with reference to the accompanying drawings.

[0124] In some specific embodiments of the present invention, such as Figures 1-12 As shown, the gas water heater 1 includes a gas heating device 500, an electric auxiliary heating device 100, and a circulating water pump 400.

[0125] Specifically, such as Figure 9 As shown, the gas water heater 1 also includes a water temperature detection device, and the control method further includes:

[0126] The target water temperature is obtained when entering the preheating state;

[0127] After the electric auxiliary heating device 100 is running, when the sum of the detected value of the water temperature detection device and the predetermined temperature rise is greater than the target water temperature, the electric auxiliary heating device 100 is stopped and the gas heating device 500 is run.

[0128] In other words, the control method at this time includes the following steps:

[0129] Enter the preheating state and obtain the target water temperature;

[0130] The circulating water pump is running at 400.

[0131] The electric auxiliary heating device is 100% operational.

[0132] When the sum of the detected value of the water temperature detection device and the predetermined temperature rise is greater than the target water temperature, the electric auxiliary heating device 100 stops and the gas heating device 500 starts.

[0133] Gas heating device 500 stops.

[0134] This allows for timely switching from electric auxiliary heating to gas heating when the actual water temperature reaches a point where the difference from the target water temperature is less than the predetermined temperature rise. This effectively avoids the problem of uneven water temperature within the pipeline caused by electric auxiliary heating heating only localized areas to the target temperature.

[0135] Specifically, the predetermined temperature rise is the temperature rise after the water completes one full pipeline circulation. In other words, the predetermined temperature rise is the temperature rise after the water circulates once. This not only further avoids the electric auxiliary heating device 100 heating a local area in the pipeline to the target temperature, but also reduces the temperature rise required for the gas heating stage, reduces the gas heating time, and reduces the noise generated by the gas water heater 1 during the preheating stage.

[0136] Those skilled in the art will understand that the predetermined temperature rise can also be selected according to actual needs, using other temperature rise methods that can avoid the electric auxiliary heating from locally heating the water in the pipeline to the target temperature.

[0137] More specifically, such as Figure 9 As shown, the control method further includes:

[0138] After the gas heating device 500 is running, when the value detected by the water temperature detection device is greater than the sum of the predetermined hysteresis temperature and the target temperature, the gas heating device 500 is stopped.

[0139] In other words, the control method at this time includes the following steps:

[0140] Enter the preheating state and obtain the target water temperature;

[0141] The circulating water pump is running at 400.

[0142] The electric auxiliary heating device is 100% operational.

[0143] When the sum of the detected value of the water temperature detection device and the predetermined temperature rise is greater than the target water temperature, the electric auxiliary heating device 100 stops and the gas heating device 500 starts.

[0144] When the value detected by the water temperature detection device is greater than the sum of the predetermined hysteresis temperature and the target temperature, the gas heating device 500 stops.

[0145] This ensures that the actual water temperature after heating stops is slightly higher than the target water temperature. This allows the water to cool down during the time between heating and user use, ensuring that the outlet water temperature remains above or equal to the target temperature when the user uses the water, thus avoiding any impact on user experience.

[0146] Those skilled in the art will understand that the predetermined hysteresis temperature can be obtained through experiments, big data analysis, or actual needs.

[0147] Figure 10 A control method for a gas water heater according to some examples of the present invention is shown. For example... Figure 10 As shown, the gas water heater 1 also includes an antifreeze mode, and the control method includes the following steps:

[0148] Enter the antifreeze state;

[0149] The circulating water pump is running at 400.

[0150] The electric auxiliary heating device is in operation.

[0151] This allows for heating and freeze protection solely by the electric auxiliary heating device 100, avoiding the operation of the gas heating device 500 during the freeze protection phase, thus preventing noise generated by the gas heating device 500 and avoiding disturbance to users' rest. Furthermore, since the freeze protection phase only requires heating to the temperature to prevent freezing, there is no need to consider issues of overheating and heating uniformity, and heating can be carried out solely by the electric auxiliary heating device 100.

[0152] Specifically, such as Figure 10 As shown, the gas water heater 1 also includes an ambient temperature detection device, and the control method further includes:

[0153] When the ambient temperature detection device detects a value lower than the predetermined freezing temperature, it controls the gas water heater 1 to enter the antifreeze state.

[0154] In other words, the control method at this time includes the following steps:

[0155] When the ambient temperature detection device detects a value lower than the predetermined freezing temperature, the device enters the antifreeze state.

[0156] The circulating water pump is running at 400.

[0157] The electric auxiliary heating device is in operation.

[0158] This allows the system to automatically enter antifreeze mode by detecting the ambient temperature, preventing the water in the pipes from freezing.

[0159] More specifically, such as Figure 10 As shown, the gas water heater 1 also includes a water temperature detection device, and the control method further includes:

[0160] When the water temperature detection device detects a value greater than the predetermined thawing temperature, the circulating water pump 400 and the electric auxiliary heating device 100 are stopped.

[0161] In other words, the control method at this time includes the following steps:

[0162] When the ambient temperature detection device detects a value lower than the predetermined freezing temperature, the device enters the antifreeze state.

[0163] The circulating water pump is running at 400.

[0164] The electric auxiliary heating device is 100% operational.

[0165] When the water temperature detection device detects a value greater than the predetermined thawing temperature, the circulating water pump and the electric auxiliary heating device are stopped.

[0166] This allows the electric auxiliary heating device 100 and the circulating water pump 400 to stop operating promptly after the predetermined thawing temperature is reached, thus avoiding energy waste.

[0167] Figure 11 A gas water heater 1 according to some examples of the present invention is shown. For example... Figure 11 As shown, the gas water heater 1 also includes an ambient temperature detection device, and the gas water heater 1 also includes a water usage status control method.

[0168] Entering the water usage state;

[0169] When the ambient temperature detection device detects a value greater than the predetermined summer temperature, the electric auxiliary heating device 100 operates and the gas heating device 500 stops.

[0170] When the ambient temperature detection device detects a value lower than the predetermined winter temperature, the electric auxiliary heating device 100 and the gas heating device 500 operate simultaneously.

[0171] In winter, when ambient temperatures are low, the gas heating unit 500 and the electric auxiliary heating unit 100 work together to increase the upper limit of the gas water heater's heat load and the upper limit of the outlet water temperature. In summer, when ambient temperatures are high, the electric auxiliary heating unit 100 can be used alone to compensate for heating loads below the minimum required for gas heating alone, thus lowering the lower limit of the gas water heater's heat load and the lower limit of the outlet water temperature. This can meet the water needs of users under different ambient temperatures, improve user comfort, and compensate for the shortcomings of gas water heaters that rely solely on the gas heating unit in related technologies.

[0172] Figure 12 A gas water heater 1 according to some examples of the present invention is shown. For example... Figure 12As shown, the gas water heater 1 also includes a flow control device 300 and a water flow sensor 320. The gas water heater 1 also includes a water usage status indicator. The control method includes the following steps:

[0173] Entering the water usage state;

[0174] When the water flow sensor detects that the water flow has stopped, the flow control device 300 reduces the outflow rate.

[0175] In this way, the flow control device 300 reduces the water flow rate after the user temporarily turns off the water. When the user turns the water back on, the water flows out at the limited flow rate, reducing the water flow rate in the gas water heater 1. This makes it easier to heat the water to the target temperature and avoids the problem of a large water flow making it difficult to heat the water to the target temperature. This reduces water temperature fluctuations and improves user comfort.

[0176] Furthermore, since the flow control device 300 actively reduces the outflow when it detects that the water flow has stopped, compared with the flow-limiting technology solution in related technologies that uses shape memory alloys with temperature sensing to adjust the pipe opening, the flow control device 300 can immediately switch to the flow-limiting state after the user temporarily turns off the water, ensuring timely restriction of the water flow and avoiding the lag caused by the shape memory alloy needing to wait for contact with the lower-temperature water flow before deforming to limit the water flow, thereby further reducing water temperature fluctuations and improving user comfort.

[0177] Specifically, such as Figure 12 As shown, the control method includes:

[0178] Entering the water usage state;

[0179] When the water flow sensor detects that the water flow has stopped, the flow control device 300 reduces the outflow rate.

[0180] When the water flow sensor detects water flow, the electric auxiliary heating device 100 is activated.

[0181] Those skilled in the art will understand that when the electric auxiliary heating device 100 is running, the gas heating device 500 runs synchronously, but the gas heating device 500 actually produces a heating effect later than the electric auxiliary heating device 100 due to processes such as self-testing and ignition.

[0182] In this way, when the user temporarily turns off the water and then turns it back on, such as when applying shower gel, the electric auxiliary heating device 100 can heat the water before the gas heating device 500 completes its self-test and ignition and can actually start heating. Compared with gas water heaters that rely solely on gas heating in related technologies, the electric auxiliary heating device 100 can make up for the heating gap caused by the gas heating device 500's self-test and ignition, thus preventing the water from coming out unheated, reducing water temperature fluctuations, and improving user comfort.

[0183] In addition, by setting up a flow control device 300, the water flow rate is reduced after the user temporarily turns off the water. When the user turns the water back on, the water flows out at the limited flow rate, reducing the water flow rate in the gas water heater 1. This makes it easier for the electric auxiliary heating device 100 to heat the water to the target temperature, avoiding the problem of a large water flow making it difficult for the electric auxiliary heating device 100 to heat the water to the target temperature. This further reduces water temperature fluctuations and improves user comfort.

[0184] More specifically, such as Figure 12 As shown, the control method includes:

[0185] Entering the water usage state;

[0186] When the water flow sensor detects that the water flow has stopped, the flow control device reduces the outflow rate.

[0187] When the water flow sensor detects water flow, the electric auxiliary heating device is activated;

[0188] After a predetermined time, the flow control device increases the outflow rate.

[0189] This allows the flow control device 300 to restore normal water flow after the gas heating device 500 is able to heat normally, ensuring smooth use for the user.

[0190] Specifically, such as Figure 7 As shown, the circulating water pump 400 is connected between the water inlet of the gas heating device 500 and the electric auxiliary heating device 100. This way, the water heated by the gas heating device will not pass through the electric auxiliary heating device 100 and the circulating water pump 400, preventing hot water from affecting the service life of the electric auxiliary heating device 100 and the circulating water pump 400, and slowing down the rate of scale accumulation in the electric auxiliary heating device 100 and the circulating water pump 400.

[0191] The following describes a computer-readable storage medium according to embodiments of the present invention. The computer-readable storage medium according to embodiments of the present invention stores a computer program thereon, which, when executed by a processor, implements a control method for a gas water heater according to the above embodiments of the present invention.

[0192] The computer-readable storage medium according to embodiments of the present invention, by utilizing the control method of the gas water heater according to the above embodiments of the present invention, has advantages such as reducing gas water heater noise and improving water temperature stability.

[0193] The following describes a gas water heater 1 according to an embodiment of the present invention. The gas water heater 1 according to the embodiment of the present invention applies the control method of the gas water heater according to the above embodiment of the present invention.

[0194] The gas water heater 1 according to an embodiment of the present invention has advantages such as low noise and stable water temperature by utilizing the control method of the gas water heater according to the above embodiment of the present invention.

[0195] The following description, with reference to the accompanying drawings, describes a gas water heater 1 according to an embodiment of the present invention.

[0196] like Figures 1-12 As shown, the gas water heater 1 according to an embodiment of the present invention includes a gas heating device 500, an electric auxiliary heating device 100, and a flow control device 300.

[0197] The flow control device 300 is provided with a normally open flow channel A and a regulating flow channel B. The flow control device 300 can switch between a flow-limiting state and a flow-free state. The flow control device closes the regulating flow channel in the flow-limiting state and opens the regulating flow channel in the flow-free state. The flow control device is connected to the electric auxiliary heating device and the gas heating device.

[0198] Specifically, during water use, after the user briefly turns off the water, the flow control device 300 switches to the flow-limiting state, closing the regulating channel. When the user turns the water back on, the electric auxiliary heating device 100 and the gas heating device 500 operate. After a period of time, the flow control device 300 switches to the unobstructed flow state, opening the regulating channel.

[0199] According to an embodiment of the present invention, the gas water heater 1, by providing an electric auxiliary heating device 100, can overcome the shortcomings of gas water heaters in related technologies that only use a gas heating device for heating. For example, in winter when the ambient temperature is low, the gas heating device 500 and the electric auxiliary heating device 100 work together to increase the upper limit of the heat load of the gas water heater and the upper limit of the outlet water temperature. In summer when the ambient temperature is high, the electric auxiliary heating device 100 can be used alone to compensate for heating conditions below the minimum load of gas heating alone, thereby lowering the lower limit of the heat load of the gas water heater and the lower limit of the outlet water temperature. This can meet the water needs of users under different ambient temperatures and improve user comfort.

[0200] Furthermore, by setting up an electric auxiliary heating device 100, when the user temporarily turns off the water and then turns it back on, such as when applying shower gel, the electric auxiliary heating device 100 can be used to heat the water before the gas heating device 500 completes its self-test and ignition and can actually start heating. Compared with gas water heaters that rely solely on gas heating in related technologies, the electric auxiliary heating device 100 can make up for the heating gap caused by the gas heating device 500's self-test and ignition, thus preventing the water from coming out without any heating, reducing water temperature fluctuations, and improving user comfort.

[0201] In addition, by setting up a flow control device 300, the water flow rate is reduced after the user temporarily turns off the water. When the user turns the water back on, the water flows out at the limited flow rate, reducing the water flow rate in the gas water heater 1. This makes it easier for the electric auxiliary heating device 100 to heat the water to the target temperature, avoiding the problem of a large water flow making it difficult for the electric auxiliary heating device 100 to heat the water to the target temperature. This further reduces water temperature fluctuations and improves user comfort.

[0202] Furthermore, since the flow control device 300 regulates the water flow by adjusting the opening and closing of the flow channel B, compared with the related technology that uses a shape memory alloy with temperature sensing to regulate the pipe opening, the flow control device 300 can immediately switch to the flow limiting state after the user temporarily turns off the water, ensuring timely restriction of the water flow and avoiding the lag caused by the shape memory alloy needing to wait for contact with the lower temperature water flow before deforming to restrict the water flow, thereby further reducing water temperature fluctuations and improving user comfort.

[0203] Therefore, the gas water heater 1 according to the embodiment of the present invention has advantages such as small water temperature fluctuation and comfortable use.

[0204] The following description, with reference to the accompanying drawings, describes a gas water heater 1 according to a specific embodiment of the present invention.

[0205] In some specific embodiments of the present invention, such as Figures 1-12 As shown, the gas water heater 1 according to an embodiment of the present invention includes a gas heating device 500, an electric auxiliary heating device 100, and a flow control device 300.

[0206] Specifically, such as Figure 8 As shown, the flow control device 300 includes an on / off valve 310. In the flow-limiting state, the on / off valve 310 closes the regulating flow channel B, and in the unobstructed flow state, the on / off valve 310 opens the regulating flow channel B. This allows the on / off valve 310 to control the opening and closing of the regulating flow channel B, facilitating the switching of the state of the flow control device 300.

[0207] More specifically, such as Figure 8 As shown, the flow control device 300 is equipped with a water flow sensor 320, and the on / off valve 310 is electrically connected to the water flow sensor 320. This allows the water flow sensor 320 to detect the water flow, facilitating the control of the on / off valve 310 based on the water flow conditions, thereby facilitating the control of the opening and closing of the regulating channel B.

[0208] Furthermore, such as Figure 8 As shown, the water flow sensor 320 is configured to control the on-off valve 310 to close the regulating flow channel B when it detects that the water flow has stopped. This allows the water flow sensor 320 to control the on-off valve 310 to close the regulating flow channel B after detecting that the user has temporarily turned off the water, causing the flow control device 300 to switch to the flow-limiting state, thereby reducing the water flow and facilitating the electric auxiliary heating device 100 to heat the water to the target temperature.

[0209] Advantageously, the electric auxiliary heating device 100 is electrically connected to the water flow sensor 320. This allows for easy control of the operation of the electric auxiliary heating device 100 based on water flow conditions.

[0210] More advantageously, the water flow sensor 320 is configured to control the operation of the electric auxiliary heating device 100 when water flow is detected. This allows the electric auxiliary heating device 100 to heat the water first when the user turns on the hot water, compensating for the waiting time caused by the self-test and ignition of the gas heating device 500, and reducing water temperature fluctuations.

[0211] Specifically, the water flow sensor 320 is configured to control the simultaneous operation of the gas heating device 500 and the electric auxiliary heating device 100 when water flow is detected. Those skilled in the art will understand that, after the gas heating device 500 and the electric auxiliary heating device 100 operate simultaneously, the gas heating device 500 will actually generate heating later than the electric auxiliary heating device 100 due to processes such as self-checking and ignition.

[0212] Furthermore, the gas water heater 1 also includes a timing device, which is electrically connected to the on / off valve 310. This allows the timing device to control when the on / off valve 310 reopens the regulating flow channel B.

[0213] Furthermore, the timing device is configured to control the on-off valve 310 to open the regulating flow channel B after the electric auxiliary heating device 100 has been running for a predetermined time. Those skilled in the art will understand that the predetermined time can be obtained through experiments, big data analysis, or actual needs. This allows the on-off valve 310 to open the regulating flow channel B after the predetermined time has elapsed and the gas heating device 500 has been able to heat normally, thus restoring the flow control device 300 to the unobstructed flow state and ensuring the water flow rate of the gas water heater 1.

[0214] Figure 8 A gas water heater 1 according to some examples of the present invention is shown. For example... Figure 8 As shown, a flow-limiting ring 330 is fitted inside the normally open flow channel A. This allows the flow-limiting ring 330 to restrict the flow in the normally open flow channel A, thereby improving the flow control effect of the flow control device 300 on the water flow during the flow-limiting state.

[0215] Specifically, such as Figure 8 As shown, the flow control device 300 also includes a pipe body 340, a water flow sensor 320 disposed inside the pipe body 340, and an on / off valve 310 mounted on the peripheral wall of the pipe body 340 with its axis perpendicular to the axis of the pipe body 340. This facilitates the placement of the on / off valve 310 and facilitates its control over the opening and closing of the regulating flow channel B.

[0216] Advantageously, such as Figure 8 As shown, the central axis of the normally open flow channel A coincides with the central axis of the tube body 340. This facilitates the installation of the normally open flow channel A.

[0217] More specifically, such as Figure 8 As shown, the peripheral wall of the pipe body 340 is provided with a water inlet 341 that connects the inside of the pipe body 340 and the regulating channel B. The on-off valve 310 controls the opening or closing of the regulating channel B by opening and closing the water inlet 341. This makes it convenient to control the opening and closing of the regulating channel B using the on-off valve 310.

[0218] More advantageously, such as Figure 7 As shown, the flow control device 300 is connected between the water inlet of the gas heating device 500 and the electric auxiliary heating device 100. This prevents hot water heated by the gas heating device 500 from flowing through the flow control device 300 and the electric auxiliary heating device 100, thus preventing the hot water from affecting the service life of the electric auxiliary heating device 100 and the flow control device 300, and slowing down the rate of scale accumulation in the electric auxiliary heating device 100 and the flow control device 300.

[0219] Optionally, the rated power of the electric auxiliary heating device 100 is 1-8 kilowatts. This facilitates the use of the electric auxiliary heating device 100 in conjunction with the gas heating device 500 for heating.

[0220] Specifically, the gas heating device 500 includes a water tank and a burner.

[0221] Other configurations and operations of the gas water heater 1 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0222] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0223] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A control method for a gas water heater, characterized in that, The gas water heater includes a gas heating device, an electric auxiliary heating device, and a circulating water pump. The gas water heater includes at least a preheating state. The control method includes the following steps: Entering the preheating state; The circulating water pump is in operation; The electric auxiliary heating device is in operation; The electric auxiliary heating device is stopped, and the gas heating device is started; The gas heating device is stopped; The gas water heater also includes a water temperature detection device, and the control method further includes: The target water temperature is obtained when entering the preheating state; After the electric auxiliary heating device is running, when the sum of the value detected by the water temperature detection device and the predetermined temperature rise is greater than the target water temperature, the electric auxiliary heating device is stopped and the gas heating device is run. The predetermined temperature rise is the temperature rise after the water flow completes one full pipeline circulation.

2. The control method for a gas water heater according to claim 1, characterized in that, The control method further includes: After the gas heating device is in operation, the gas heating device is stopped when the value detected by the water temperature detection device is greater than the sum of the predetermined hysteresis temperature and the target temperature.

3. The control method for a gas water heater according to claim 1, characterized in that, The gas water heater also includes an antifreeze mode, and the control method includes the following steps: Enter the antifreeze state; The circulating water pump is in operation; The electric auxiliary heating device is in operation.

4. The control method for a gas water heater according to claim 3, characterized in that, The gas water heater also includes an ambient temperature detection device, and the control method further includes: When the ambient temperature detection device detects a value lower than the predetermined freezing temperature, it controls the gas water heater to enter the antifreeze state.

5. The control method for a gas water heater according to claim 3, characterized in that, The gas water heater also includes a water temperature detection device, and the control method further includes: When the water temperature detection device detects a value greater than the predetermined thawing temperature, the circulating water pump and the electric auxiliary heating device are stopped.

6. The control method for a gas water heater according to claim 1, characterized in that, The gas water heater also includes an ambient temperature detection device, and the gas water heater also includes a water usage status indicator. The control method further includes: Entering the water usage state; When the ambient temperature detection device detects a value greater than the predetermined summer temperature, the electric auxiliary heating device operates and the gas heating device stops. When the ambient temperature detection device detects a value lower than the predetermined winter temperature, the electric auxiliary heating device and the gas heating device operate simultaneously.

7. The control method for a gas water heater according to claim 1, characterized in that, The gas water heater also includes a flow control device and a water flow sensor, and the gas water heater also includes a water usage status indicator. The control method includes the following steps: Entering the water usage state; When the water flow sensor detects that the water flow has stopped, the flow control device reduces the outflow rate.

8. The control method for a gas water heater according to claim 7, characterized in that, The control method includes: Entering the water usage state; When the water flow sensor detects that the water flow has stopped, the flow control device reduces the outflow rate. When the water flow sensor detects water flow, the electric auxiliary heating device is activated.

9. The control method for a gas water heater according to claim 8, characterized in that, The control method includes: Entering the water usage state; When the water flow sensor detects that the water flow has stopped, the flow control device reduces the outflow rate. When the water flow sensor detects water flow, the electric auxiliary heating device is activated; After a predetermined time, the flow control device increases the outflow rate.

10. The control method for a gas water heater according to claim 1, characterized in that, The circulating water pump is connected between the water inlet of the gas heating device and the electric auxiliary heating device.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the control method for a gas water heater as described in any one of claims 1-10.

12. A gas-fired water heater, characterized in that, The gas water heater is controlled by the gas water heater control method according to any one of claims 1-10.

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