Gas water heating equipment

Abstract

The utility model relates to gas water heating equipment, which is characterized in that a pressurizing component is additionally arranged in the gas water heating equipment, and water in a water storage tank is directly conveyed into a water inlet pipe through a water pump. In the pressurization process, water in the cold water pipe flows out of the water inlet pipe, and the water pump can input water in the water storage tank into the water inlet pipe through the pressurization pipe so as to achieve pressurization. Due to the fact that water in the water storage tank is stored in advance, the water flow during bathing can be effectively increased and is not affected by external water pressure and water supply capacity, for example, the water pressure or the water supply capacity is insufficient, the pressurization effect is effectively improved, and the water use requirement of a user is met.

Description

Technical Field

[0001] This utility model relates to the field of hot water equipment technology, and in particular to gas-fired hot water equipment. Background Technology

[0002] Gas-fired water heaters are devices that use gas combustion as an energy source to output hot water. They are popular due to their fast water flow and energy efficiency. To meet users' demands for high-flow-rate water from gas-fired water heaters, traditional systems typically incorporate a built-in pressure boosting function. However, limitations in the structural design of this device result in a weak pressure boosting effect, failing to meet users' water usage needs. Utility Model Content

[0003] The first technical problem solved by this utility model is to provide a gas-fired water heater that can effectively improve the pressurization effect and meet the user's water demand.

[0004] The first technical problem mentioned above is solved by the following technical solution:

[0005] A gas-fired water heater includes: a heat exchange component and an inlet pipe, the inlet pipe being connected to the inlet end of the heat exchange component; and a pressurization component, including a water storage tank, a water pump, and a pressurization pipe, the inlet pipe being connected to the water storage tank via the pressurization pipe, and the water pump being used to draw water from the water storage tank into the inlet pipe via the pressurization pipe.

[0006] The gas-fired water heater of this invention offers several advantages over the prior art: By adding a pressurization component to the gas-fired water heater, water from the storage tank is directly pumped into the inlet pipe via a water pump. During the pressurization process, in addition to water flowing into the inlet pipe, the water pump also draws water from the storage tank into the inlet pipe through the pressurization pipe, thus achieving pressurization. Since the water in the storage tank is pre-stored, the water flow during showering can be effectively increased, unaffected by external water pressure or supply capacity, effectively improving the pressurization effect and meeting the user's water needs.

[0007] In some embodiments, the gas-fired water heater further includes a hot water pipe and a return water pipe connected to the hot water pipe. The hot water pipe is connected to the outlet end of the heat exchange component. One end of the booster pipe is connected to the inlet pipe, and the other end can be selectively connected to the return water pipe and the water storage tank. This design enables the gas-fired water heater to have a booster function and a zero-cold-water function.

[0008] In some embodiments, the pressurization assembly further includes a reversing valve, through which the pressurization pipe can be selectively connected to the return water pipe and the water storage tank. This design allows the gas-fired water heater to flexibly switch between pressurization mode and zero-cold-water mode, improving product performance.

[0009] In some embodiments, the pressurization assembly further includes a first one-way valve disposed on the pressurization pipe to allow water from the pressurization pipe to flow unidirectionally into the inlet pipe. Thus, the introduction of the first one-way valve ensures that water in the pressurization pipe flows smoothly into the inlet pipe, preventing backflow of water from the inlet pipe.

[0010] In some embodiments, the gas-fired water heater further includes a connecting pipe, a hot water pipe connected to the outlet end of the heat exchange component, and a cold water pipe connected to the inlet pipe, wherein the connecting pipe connects the hot water pipe and the cold water pipe. This design allows water in the hot water pipe to flow back to the cold water pipe via the connecting pipe, achieving water circulation and preheating within the hot water pipe, connecting pipe, cold water pipe, inlet pipe, and heat exchange component.

[0011] In some embodiments, the gas-fired water heater further includes a cold water pipe connected to the inlet pipe, and the booster assembly further includes a water supply pipe, one end of which is connected to the water storage tank and the other end of which is connected to the cold water pipe. Therefore, when the water level in the water storage tank is lower than a minimum preset water level, water from the cold water pipe can enter the water storage tank through the water supply pipe, ensuring that the water level in the water storage tank remains sufficient.

[0012] In some embodiments, the pressurization assembly further includes an on / off valve located on the water supply pipe. Thus, when the water in the storage tank is insufficient, the on / off valve controls the flow of water between the water supply pipe and the cold water pipe, ensuring timely replenishment of the water in the storage tank; when the water in the storage tank is sufficient, the on / off valve disconnects the connection between the water supply pipe and the cold water pipe, preventing further water replenishment during pressurization and reducing the impact of water replenishment on pressurization.

[0013] In some embodiments, the pressurization assembly further includes a water level detector for detecting the water level in the water storage tank. Thus, by obtaining the water level information in the water storage tank through the water level detector, water can be replenished to the tank in a timely manner to ensure a stable water supply.

[0014] In some embodiments, the gas-fired water heater further includes a first temperature detector and a water flow detector. The first temperature detector detects the water temperature in the inlet pipe, and the water flow detector detects the water flow rate in the inlet pipe. Thus, by obtaining the water temperature in the inlet pipe through the first temperature detector, the stopping conditions for zero cold water can be determined in zero cold water mode.

[0015] In some embodiments, the water storage tank is equipped with a vent. This design ensures a stable water supply to the tank.

[0016] The second technical problem mentioned above is solved by the following technical solution:

[0017] A control method for a gas-fired water heater, applied to any of the gas-fired water heaters described above, wherein the gas-fired water heater further includes a cold water pipe connected to the inlet pipe, and the booster assembly further includes an on / off valve, the on / off valve being used to control whether water in the cold water pipe flows into the storage tank, the method comprising the following steps: entering a booster mode, determining whether the water flow rate in the inlet pipe is greater than the starting flow rate; if so, keeping the on / off valve in a closed state, and determining whether the water level in the storage tank exceeds a minimum preset water level, wherein the on / off valve is used to control whether water in the cold water pipe flows into the storage tank; if so, controlling the water pump to start.

[0018] The control method for the gas-fired water heater described in this utility model offers the following advantages compared to the prior art: When applied to the gas-fired water heater, during the pressurization process, in addition to water flowing from the cold water pipe into the inlet pipe, the water pump also draws water from the storage tank into the inlet pipe to achieve pressurization. Since the water in the storage tank is pre-stored, the water flow during showering can be effectively increased, unaffected by external water pressure and supply capacity, effectively improving the pressurization effect and meeting the user's water needs.

[0019] In some embodiments, after determining whether the water flow rate in the inlet pipe is greater than the start-up flow rate, the method further includes: if not, keeping the water pump in a closed state and determining whether the water level in the storage tank exceeds the minimum preset water level; if not, opening the on / off valve to connect the cold water pipe to the storage tank.

[0020] A control method for a gas-fired water heater, applied to the aforementioned gas-fired water heater, wherein the booster assembly further includes an on / off valve for controlling whether water in the cold water pipe flows into the storage tank; the method includes the following steps: entering a booster mode, determining whether the water flow rate in the inlet pipe is greater than the starting flow rate; if not, keeping the water pump in a closed state, and determining whether a zero cold water command has been received; if yes, controlling the reversing valve to operate, causing the booster pipe to switch to communication with the hot water pipe; controlling the water pump to start; after the circulation preheating reaches the stop condition, controlling the water pump to stop running, and controlling the reversing valve to operate, causing the booster pipe to switch to communication with the storage tank; if the water flow rate in the inlet pipe is greater than the starting flow rate, keeping the on / off valve in a closed state, and determining whether the water level in the storage tank exceeds the minimum preset water level; if yes, controlling the water pump to start.

[0021] The control method for the gas-fired water heater described in this utility model offers the following advantages compared to the prior art: By using a reversing valve, the booster pipe is switched to connect with the hot water pipe, forming a circulating water circuit. This ensures that the water is effectively preheated before use, improving bathing comfort. Simultaneously, when pressurization is required, the reversing valve switches the booster pipe to connect with the storage tank. At this time, the water pump draws water from the storage tank to the inlet pipe through the booster pipe, achieving pressurization. Since the water in the storage tank is pre-stored, the water flow during bathing can be effectively increased, unaffected by external water pressure or supply capacity, such as insufficient water pressure or supply capacity, effectively improving the pressurization effect and meeting the user's water needs.

[0022] A control method for a gas-fired water heater, applied to the aforementioned gas-fired water heater, wherein the pressurization component further includes an on / off valve for controlling whether water in the cold water pipe flows into the water storage tank; the method includes the following steps: entering pressurization mode, determining whether the water flow rate in the inlet pipe is greater than the starting flow rate; if not, keeping the water pump in a closed state, and determining whether a zero cold water command has been received; if yes, keeping the on / off valve in a closed state, and controlling the water pump to start; after the circulation preheating reaches the stop condition, controlling the water pump to stop running; if the water flow rate in the inlet pipe is greater than the starting flow rate, keeping the on / off valve in a closed state, and determining whether the water level in the water storage tank exceeds the minimum preset water level; if yes, controlling the water pump to start.

[0023] The control method for the gas-fired water heater described in this utility model offers the following advantages compared to the prior art: By connecting hot and cold water pipes to form a circulating water path, the water is effectively preheated before use, enhancing bathing comfort. Simultaneously, when pressurization is required, the water pump draws water from the storage tank to the inlet pipe via a pressurization pipe. Since the water in the storage tank is pre-stored, the water flow during bathing is effectively increased, unaffected by external water pressure or supply capacity, such as insufficient water pressure or supply capacity, thus effectively improving the pressurization effect and meeting the user's water needs. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of a gas-fired hot water device with a booster pipe but without a circulating water path, as described in some embodiments of this application. Figure 1 .

[0027] Figure 2 This is a schematic diagram of the structure of a gas-fired hot water device with a booster pipe but without a circulating water path, as described in some embodiments of this application. Figure 2 .

[0028] Figure 3 This is a schematic diagram of the structure of a gas-fired water heater with a return water pipe as described in some embodiments of this application.

[0029] Figure 4 This is a schematic diagram of the structure of a gas-fired hot water device with a connecting pipe as described in some embodiments of this application.

[0030] Figure 5 The control method flow of the gas-fired water heater described in some embodiments of this application is as follows. Figure 1 .

[0031] Figure 6 The control method flow of the gas-fired water heater described in some embodiments of this application is as follows. Figure 2 .

[0032] Figure 7 The control method flow of the gas-fired water heater described in some embodiments of this application is as follows. Figure 3 .

[0033] Figure 8 The control method flow of the gas-fired water heater described in some embodiments of this application is as follows. Figure 4 .

[0034] Figure 9 The control logic for the gas-fired water heater described in some embodiments of this application Figure 1 .

[0035] Figure 10 The control logic for the gas-fired water heater described in some embodiments of this application Figure 2 .

[0036] Figure 11 The control logic for the gas-fired water heater described in some embodiments of this application Figure 3 .

[0037] Figure label:

[0038] 100. Gas-fired hot water equipment; 11. Heat exchanger assembly; 12. Inlet pipe; 121. Water flow detector; 122. First temperature detector; 13. Cold water pipe; 131. Third check valve; 14. Hot water pipe; 141. Second temperature detector; 15. Return pipe; 16. Connecting pipe; 161. Second check valve; 17. Housing; 18. Controller; 20. Pressure boosting assembly; 21. Pressure boosting pipe; 211. Reversing valve; 212. First check valve; 22. Water pump; 222. Suction pipe; 23. Water storage tank; 231. Vent; 24. Water level detector; 241. First detector; 242. Second detector; 25. Water supply pipe; 251. On / off valve. Detailed Implementation

[0039] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0040] In some embodiments, please refer to Figures 1 to 3 This application provides a gas-fired water heater 100, which includes a pressurization component 20, a heat exchange component 11, and an inlet pipe 12. The inlet pipe 12 is connected to the inlet end of the heat exchange component 11. The pressurization component 20 includes a water storage tank 23, a water pump 22, and a pressurization pipe 21. The inlet pipe 12 is connected to the water storage tank 23 through the pressurization pipe 21. The water pump 22 is used to draw water from the water storage tank 23 into the inlet pipe 12 through the pressurization pipe 21.

[0041] The aforementioned gas-fired water heater 100 incorporates a booster component 20, which uses a water pump 22 to directly deliver water from the storage tank 23 to the inlet pipe 12. During the pressurization process, in addition to water flowing into the inlet pipe 12, the water pump 22 also draws water from the storage tank 23 into the inlet pipe 12 via a booster pipe 21 to achieve pressurization. Since the water in the storage tank 23 is pre-stored, it effectively increases the water flow during showering, unaffected by external water pressure or supply capacity, such as insufficient water pressure or supply capacity, thus effectively improving the pressurization effect and meeting the user's water needs.

[0042] It should be noted that the heat exchange component 11 is a heat exchange component in the gas water heater 100, which can exchange heat to raise the temperature of cold water. It has an inlet end and an outlet end. The inlet end is connected to the inlet pipe 12, so that the water in the inlet pipe 12 flows into the heat exchange component 11, while the outlet end can output the heated water, which can be output to the outside, for example, by outputting hot water to the user through a shower head.

[0043] When pressurization is required, the water pump 22 provides power to drive water from the outlet tank through the booster pipe 21 into the inlet pipe 12, thereby increasing the water flow and pressure in the inlet pipe 12. The inlet pipe 12 is connected to the storage pipe 23 via the booster pipe 21. The connection method can be varied; for example, one end of the inlet pipe 12 can extend directly into the storage pipe 23, in which case the booster pipe 21 becomes part of the inlet pipe 12. See reference [reference needed] for details. Figure 2 Alternatively, a booster pipe 23 may be connected to one side of the water inlet pipe 12, in which case at least a portion of the booster pipe 23 may be parallel to the water inlet pipe 12.

[0044] The water storage tank 23 refers to a container structure with a certain space. It can be designed as a cylinder, a cuboid, or other shapes, and no specific limitation is made here. The capacity of the water storage tank 23 can be determined according to the user's needs. For example, if a typical user's shower water flow rate is around 6L / min, the flow rate can be increased to 12L / min by pre-filling water and pressurizing it. This means the water storage tank 23 reduces water flow by 6L per minute. If a user's shower time is estimated to be 10 minutes, a 60L water storage tank 23 would be suitable. Different water storage tank volumes can be selected based on different user needs and the desired increase in flow rate. If only the water flow rate needs to be increased from 6L to 10L, the water storage tank 23 reduces water flow by 4L per minute, thus a 40L water storage tank 23 would be suitable.

[0045] The water pump 22 can be positioned in various ways within the gas-fired water heater 100. For example, the gas-fired water heater 100 may include a housing 17, and the water pump 22 may be installed inside or outside the housing 17; alternatively, it may be installed inside the water storage tank 23. When the water pump 22 is installed outside the housing 17, a higher power device can be considered. Of course, the water storage tank 23 can also be integrated inside or outside the housing 17, for example, the water storage tank 23 may be located below the housing 17.

[0046] Additionally, the water pump 22 can be installed on the inlet pipe 12 or on the booster pipe 21. When the water pump 22 is installed on the booster pipe 21, most or all of the suction force of the water pump 22 can be applied in the booster pipe 21, thereby ensuring that the water in the storage tank 23 is stably pumped. It should be noted that the connection between the inlet pipe 12 and the storage tank 23 via the booster pipe 21 emphasizes that the inlet pipe 12 and the storage tank 23 must be connected through the booster pipe 21, rather than emphasizing that the booster pipe 21 is always connected to the storage tank 23. The booster pipe 21 can be always connected to the storage tank 23; it can also be disconnected from the storage tank 23 in non-boosting mode, but in boosting mode, the booster pipe 21 must be connected to the storage tank 23.

[0047] In some embodiments, please refer to Figure 3The gas-fired water heater 100 also includes a hot water pipe 14 and a return water pipe 15 connected to the hot water pipe 14. The hot water pipe 14 is connected to the outlet end of the heat exchange component 11. One end of the booster pipe 21 is connected to the inlet pipe 12, and the other end can be selectively connected to the return water pipe 15 and the water storage tank 23. The hot water pipe 14 refers to the tubular structure that transports water after heat exchange by the heat exchange component 11. When the booster pipe 21 is selectively connected to the return water pipe 15, a circulating water path can be formed in the gas-fired water heater 100. That is, water can sequentially pass through the heat exchange component 11, the hot water pipe 14, the return water pipe 15, the booster pipe 21, and the inlet pipe 12, and circulate and preheat according to the above flow path. This eliminates cold water in the pipes, achieving zero cold water output and improving the bathing experience. This design enables the gas-fired water heater 100 to have both booster and zero cold water functions.

[0048] It should be noted that the circulating water circuit refers to a structure that allows at least a portion of the heated water in the hot water pipe 14 to flow back to the heat exchange component 11 for preheating until the preheating condition is met, thus achieving a zero-cold-water function. When the booster pipe 21 is connected to the return water pipe 15, the circulating water circuit can be a channel formed by the inlet pipe 12, the heat exchange component 11, a portion of the hot water pipe 14, the return water pipe 15, and the booster pipe 21. Further details can be found in the following references. Figure 3 The booster assembly 20 also includes a reversing valve 211. The booster pipe 21 can be selectively connected to the return pipe 15 and the water storage tank 23 via the reversing valve 211. Therefore, when the gas water heater 100 is in booster mode, the booster pipe 21 is connected to the water storage tank 23 via the reversing valve 211, allowing water from the water storage tank 23 to enter the inlet pipe 12, increasing water flow and pressure to meet user needs. When the gas water heater 100 is in zero-cold-water mode, the booster pipe 21 is connected to the return pipe 15 via the reversing valve 211, allowing hot water from the hot water pipe 14 to flow back to the inlet pipe 12 via the booster pipe 21 for preheating. This design allows the gas water heater 100 to flexibly switch between booster mode and zero-cold-water mode, improving product performance.

[0049] Of course, in other embodiments, the return water pipe 15 can also be directly connected to the inlet water pipe 12 or the cold water pipe 13, so that the water in the hot water pipe 14 flows back to the inlet water pipe 12 for circulation preheating.

[0050] In addition, the pressurization assembly 20 may also include a water suction pipe 222, which extends into the water storage tank 23 and is connected to the reversing valve 211. This ensures that water is stably drawn from the water storage tank 23 to achieve effective and stable pressurization.

[0051] In some embodiments, please refer to Figure 4The gas-fired water heater 100 also includes a connecting pipe 16, a hot water pipe 14 connected to the outlet end of the heat exchange component 11, and a cold water pipe 13 connected to the inlet pipe 12. The connecting pipe 16 connects the hot water pipe 14 and the cold water pipe 13. With this design, water in the hot water pipe 14 flows back to the cold water pipe 13 through the connecting pipe 16, realizing the circulation and preheating of water in the hot water pipe 14, the connecting pipe 16, the cold water pipe 13, the inlet pipe 12, and the heat exchange component 11.

[0052] It should be noted that, in order to achieve a better zero-cold-water effect, the connecting pipe 16 can be connected to the hot water pipe 14 located at the farthest water-using node, so that most water-using nodes can have a zero-cold-water effect.

[0053] In some embodiments, please refer to Figure 1 The booster assembly 20 also includes a first one-way valve 212. The first one-way valve 212 is disposed on the booster pipe 21 and is used to allow water from the booster pipe 21 to flow unidirectionally into the inlet pipe 12. In this way, the introduction of the first one-way valve 212 can ensure that the water in the booster pipe 21 flows smoothly into the inlet pipe 12 and prevent the water in the inlet pipe 12 from flowing back.

[0054] In some embodiments, please refer to Figure 1 The pressurization component 20 also includes a water supply pipe 25. One end of the water supply pipe 25 is connected to the water storage tank 23, and the other end is connected to the cold water pipe 13. Therefore, when the water level in the water storage tank 23 is lower than the minimum preset water level, water from the cold water pipe 13 can enter the water storage tank 23 through the water supply pipe 25 to ensure that the water in the water storage tank 23 remains sufficient.

[0055] To prevent cold water backflow, a second check valve 161 can be installed on the connecting pipe 16 to allow water in the hot water pipe 14 to flow unidirectionally into the cold water pipe 13. Similarly, a third check valve 131 can also be installed on the cold water pipe 13 to ensure a stable supply of external water to the cold water pipe 13.

[0056] Further, please refer to Figure 1 The pressurization assembly 20 also includes an on / off valve 251, which is located on the water supply pipe 25. Thus, when the water in the water storage tank 23 is insufficient, the on / off valve 251 controls the flow of water between the water supply pipe 25 and the cold water pipe 13, ensuring timely replenishment of water in the water storage tank 23; when the water in the water storage tank 23 is sufficient, the on / off valve 251 disconnects the connection between the water supply pipe 25 and the cold water pipe 13, preventing further water replenishment during pressurization and reducing the impact of water replenishment on pressurization.

[0057] Optionally, the on / off valve 251 may be, but is not limited to, a solenoid valve.

[0058] In some embodiments, please refer to Figure 1The pressurization assembly 20 also includes a water level detector 24, which is used to detect the water level information in the water storage tank 23. In this way, by obtaining the water level information in the water storage tank 23 through the water level detector 24, water can be replenished into the water storage tank 23 in a timely manner to ensure a stable water supply.

[0059] Please refer to the following: Figure 1 The water level detector 24 may include a first detector 241 and a second detector 242. The first detector 241 is used to detect whether the water in the water storage tank 23 has reached the highest preset water level, and the second detector 242 is used to detect whether the water in the water storage tank 23 has reached the lowest preset water level. The highest preset water level is higher than the lowest preset water level. Thus, during the pressurization process, if the second detector 242 detects that the water level has reached or fallen below the lowest preset water level, it indicates that the water in the water storage tank 23 is insufficient, and water should be added to the water storage tank 23 in a timely manner; when the first detector 241 detects that the water level has reached the highest preset water level, it indicates that the water in the water storage tank 23 is sufficient, and water addition should be stopped in a timely manner.

[0060] Meanwhile, the water level detector 24 can be, but is not limited to, a water level sensor.

[0061] In some embodiments, please refer to Figure 1 The gas-fired water heater 100 also includes a first temperature detector 122 and a water flow detector 121. The first temperature detector 122 is used to detect the water temperature in the inlet pipe 12, and the water flow detector 121 is used to detect the water flow rate in the inlet pipe 12. Thus, by obtaining the water temperature in the inlet pipe 12 through the first temperature detector 122, the stopping conditions for zero cold water can be determined in the zero cold water mode. Simultaneously, the water flow detector 121 obtains the water flow rate when the gas water heater starts, in order to determine the ignition conditions.

[0062] To ensure that the outlet water temperature meets the user's requirements, the gas water heater 100 may also include a second temperature detector 141, which is used to detect the temperature of the water output from the heat exchange component 11.

[0063] In addition, to achieve automated control, the gas-fired water heater 100 also includes a controller 18, a water flow detector 121, a first temperature detector 122, a second temperature detector 141, a water level detector 24, an on / off valve 251, a reversing valve 211, and a water pump 22, all of which are electrically connected to the controller 18.

[0064] In some embodiments, please refer to Figure 1 The water storage tank 23 is equipped with an air vent 231. This design ensures a stable water supply to the water storage tank 23.

[0065] In some embodiments, please refer to Figure 5 and Figure 9A control method for a gas-fired water heater, applied to the gas-fired water heater 100 according to any of the above, wherein the gas-fired water heater 100 further includes a cold water pipe 13 connected to the inlet pipe 12, and the booster assembly 20 further includes an on / off valve 251, the on / off valve 251 being used to control whether water in the cold water pipe 13 flows into the water storage tank 23; the method includes the following steps:

[0066] S100, Enter the booster mode and determine whether the water flow in the inlet pipe 12 is greater than the starting flow;

[0067] S200. If so, keep the on / off valve 251 in the closed state and determine whether the water level in the water storage tank 23 exceeds the minimum preset water level. The on / off valve 251 is used to control whether the water in the cold water pipe 13 flows into the water storage tank 23.

[0068] S300, if so, control water pump 22 to start.

[0069] The control method described above for gas-fired water heating equipment, when applied to the aforementioned gas-fired water heater, involves the following process: during the pressurization process, in addition to water flowing from the cold water pipe 13 into the inlet pipe 12, the water pump 22 also inputs water from the storage tank 23 into the inlet pipe 12 to achieve pressurization. Since the water in the storage tank 23 is pre-stored, it effectively increases the water flow during showering, unaffected by external water pressure or water supply capacity, effectively improving the pressurization effect and meeting the user's water needs.

[0070] It should be noted that in step S100, the gas water heater 100 can be judged to have started normally by comparing the water flow rate in the inlet pipe 12 with the start-up flow rate. If the flow rate is less than the start-up flow rate, it means that the user is not using hot water; otherwise, it means that the user is using hot water, and the gas water heater 100 will start normally.

[0071] It should also be noted that in step S200, if the gas water heater 100 starts normally, the on-off valve 251 can be kept closed. For example, when the gas water heater 100 starts normally, if the on-off valve 251 is open, it needs to be closed; if the on-off valve 251 was already closed, its state remains unchanged. Meanwhile, in step S200, the minimum preset water level refers to the water level in the storage tank 23 used to determine whether water needs to be added. In pressurization mode, keeping the on-off valve 251 closed before starting the water pump 22 prevents the storage tank 23 from remaining connected to the cold water pipe 13, which could lead to pressure loss and affect the pressurization effect of the water pump 22.

[0072] Of course, the water storage tank 23 also has a maximum preset water level. When the water level in the water storage tank 23 reaches the maximum preset water level, the on / off valve 251 is closed to stop replenishing water to the water storage tank 23.

[0073] Further, please refer to Figure 6 After step S100, which determines whether the water flow rate in the inlet pipe 12 is greater than the starting flow rate, the following steps are also included:

[0074] S400 If not, keep the water pump 22 in the off state and determine whether the water level in the water tank 23 exceeds the minimum preset water level;

[0075] S500 If not, open the on / off valve 251 to connect the cold water pipe 13 to the water storage tank 23.

[0076] Therefore, in step S400, it indicates that the gas-fired water heater 100 has started normally and the user is not using hot water. At this time, no pressurization is required, ensuring that the water pump 22 is in the off state. Simultaneously, the relationship between the water level in the storage tank 23 and the minimum preset water level is determined to promptly understand the water level information in the storage tank 23. In step S500, if the water level is not exceeded, it indicates that the water in the storage tank 23 is insufficient, and the on / off valve 251 needs to be opened to replenish water promptly.

[0077] It should be noted that when pressurization is not required, the water pump 22 can be kept in the off state in several ways. For example, if the water pump 22 is in the on state when the gas water heater 100 has not been ignited and started normally, then the water pump 22 should be turned off; if the water pump 22 was already in the off state, then the state of the water pump 22 should remain unchanged.

[0078] It should also be noted that after executing step S400, if so, the on / off valve 251 remains in the closed state.

[0079] In some embodiments, this application provides a control method for a gas-fired water heater; please refer to... Figure 7 and Figure 10 The booster assembly 20 also includes a reversing valve 211, through which the booster pipe 21 can be selectively connected to the return water pipe 15 and the water storage tank 23; the booster assembly 20 also includes an on / off valve 251, which is used to control whether water in the cold water pipe 13 flows into the water storage tank 23; the method includes the following steps:

[0080] S100, Enter the booster mode and determine whether the water flow in the inlet pipe 12 is greater than the starting flow;

[0081] S600 If not, keep water pump 22 in the off state and determine whether a zero cold water command has been received;

[0082] S710 controls the operation of the reversing valve 211, causing the booster pipe 21 to switch to be connected to the hot water pipe 14;

[0083] S720, control water pump 22 to start;

[0084] S730. After the circulation preheating reaches the stop condition, control the water pump 22 to stop running and control the reversing valve 211 to work, so that the booster pipe 21 switches to be connected to the water storage tank 23.

[0085] S200. If the water flow rate in the inlet pipe 12 is greater than the starting flow rate, keep the on / off valve 251 closed and determine whether the water level in the water storage tank 23 exceeds the minimum preset water level.

[0086] S300, if so, control water pump 22 to start.

[0087] Therefore, by using the reversing valve 211, the booster pipe 21 is switched to connect with the hot water pipe 14, forming a circulating water circuit. This ensures that the water is effectively preheated before use, improving the comfort of bathing. Simultaneously, when pressurization is required, the reversing valve 211 switches the booster pipe 21 to connect with the water storage tank 23. At this time, the water pump 22 inputs water from the water storage tank 23 to the inlet pipe 12 through the booster pipe 21 to achieve pressurization. Since the water in the water storage tank 23 is pre-stored, it can effectively increase the water flow during bathing, unaffected by external water pressure or water supply capacity, such as insufficient water pressure or supply capacity, effectively improving the pressurization effect and meeting the user's water needs.

[0088] It should be noted that in some specific embodiments, after step S730 is executed, the water tank 23 water replenishment determination step of the above embodiment can be executed. For example, after step S730 is executed, the water pump 22 is kept in the off state, and it is determined whether the water level of the water tank 23 exceeds the minimum preset water level; if not, the on / off valve 251 is opened to connect the cold water pipe 13 to the water tank 23. In addition, after opening the on / off valve 251, it can be determined whether the water level of the water tank 23 exceeds the maximum preset water level; if so, the on / off valve 251 is closed.

[0089] In some embodiments, this application provides a control method for a gas-fired water heater; please refer to... Figure 8 and Figure 11 The gas-fired water heater 100 also includes a connecting pipe 16, a hot water pipe 14 connected to the outlet end of the heat exchange component 11, and a cold water pipe 13 connected to the inlet pipe 12. The connecting pipe 16 connects the hot water pipe 14 and the cold water pipe 13. The pressurization component 20 also includes an on / off valve 251, which is used to control whether water in the cold water pipe 13 flows into the water storage tank 23. The method includes the following steps:

[0090] S100, Enter the booster mode and determine whether the water flow in the inlet pipe 12 is greater than the starting flow;

[0091] S600 If not, keep water pump 22 in the off state and determine whether a zero cold water command has been received;

[0092] S740. If so, keep the on / off valve 251 closed and control the water pump 22 to start. The on / off valve 251 is used to control whether the water in the cold water pipe 13 flows into the water storage tank 23.

[0093] S750, after the circulation preheating reaches the stop condition, control water pump 22 to stop running;

[0094] S200. If the water flow rate in the inlet pipe 12 is greater than the starting flow rate, keep the on / off valve 251 closed and determine whether the water level in the water storage tank 23 exceeds the minimum preset water level.

[0095] S300, if so, control water pump 22 to start.

[0096] Therefore, by connecting the hot water pipe 14 and the cold water pipe 13, a circulating water circuit is formed, ensuring that the water is effectively preheated before use, thus improving the comfort of bathing. Simultaneously, when pressurization is required, the water pump 22 inputs water from the storage tank 23 to the inlet pipe 12 through the pressurization pipe 21 to achieve pressurization. Since the water in the storage tank 23 is pre-stored, it can effectively increase the water flow during bathing, unaffected by external water pressure or water supply capacity, such as insufficient water pressure or supply capacity, effectively improving the pressurization effect and meeting the user's water needs.

[0097] It should be noted that in some specific embodiments, after step S750 is executed, the water tank 23 water replenishment determination step of the above embodiment can be executed. For example, after step S750 is executed, the water pump 22 is kept in the off state, and it is determined whether the water level of the water tank 23 exceeds the minimum preset water level; if not, the on / off valve 251 is opened to connect the cold water pipe 13 to the water tank 23. In addition, after opening the on / off valve 251, it can be determined whether the water level of the water tank 23 exceeds the maximum preset water level; if so, the on / off valve 251 is closed.

[0098] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 this utility model.

[0099] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0100] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0101] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0102] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0103] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments 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.

[0104] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A gas-fired hot water device, characterized in that, The gas-fired hot water equipment includes: The heat exchange assembly (11) is connected to the water inlet pipe (12), and the water inlet pipe (12) is connected to the water inlet end of the heat exchange assembly (11); The pressurization assembly (20) includes a water storage tank (23), a water pump (22), and a pressurization pipe (21). The inlet pipe (12) is connected to the water storage tank (23) through the pressurization pipe (21). The water pump (22) is used to draw water from the water storage tank (23) into the inlet pipe (12) through the pressurization pipe (21). The gas-fired water heater also includes a hot water pipe (14) and a return water pipe (15) connected to the hot water pipe (14). The hot water pipe (14) is connected to the outlet end of the heat exchange component (11). One end of the booster pipe (21) is connected to the inlet pipe (12), and the other end can be selectively connected to the return water pipe (15) and the water storage tank (23). The booster component (20) also includes a reversing valve (211). The booster pipe (21) can be selectively connected to the return water pipe (15) and the water storage tank (23) through the reversing valve (211).

2. The gas-fired hot water equipment according to claim 1, characterized in that, The booster assembly (20) further includes a first one-way valve (212), which is disposed on the booster pipe (21) and is used to allow water from the booster pipe (21) to flow unidirectionally into the inlet pipe (12).

3. The gas-fired hot water equipment according to claim 1, characterized in that, The gas-fired water heater also includes a connecting pipe (16), a hot water pipe (14) connected to the outlet end of the heat exchange component (11), and a cold water pipe (13) connected to the inlet pipe (12). The connecting pipe (16) is connected between the hot water pipe (14) and the cold water pipe (13).

4. The gas-fired hot water equipment according to any one of claims 1-3, characterized in that, The gas-fired water heater also includes a cold water pipe (13) connected to the inlet pipe (12), and the booster assembly (20) also includes a water supply pipe (25), one end of which is connected to the water storage tank (23) and the other end is connected to the cold water pipe (13).

5. The gas-fired hot water equipment according to claim 4, characterized in that, The pressurization assembly (20) also includes an on / off valve (251), which is located on the water supply pipe (25).

6. The gas-fired hot water equipment according to any one of claims 1-3, characterized in that, The pressurization assembly (20) also includes a water level detector (24), which is used to detect the water level information in the water storage tank (23).

7. The gas-fired hot water equipment according to any one of claims 1-3, characterized in that, The gas-fired water heater also includes a first temperature detector (122) and a water flow detector (121). The first temperature detector (122) is used to detect the water temperature in the inlet pipe (12), and the water flow detector (121) is used to detect the water flow in the inlet pipe (12).

8. The gas-fired hot water equipment according to any one of claims 1-3, characterized in that, The water storage tank (23) is provided with an exhaust port (231).

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