Water servo structure for gas water heater and gas water heater

Abstract

The utility model provides a gas water heater and a water servo structure used for the gas water heater, the water servo structure comprises a water inlet, a first water outlet and a second water outlet, the first water outlet is communicated with a water inlet pipe of the gas water heater, the second water outlet is communicated with a bypass pipe of the gas water heater, a valve cavity is arranged in a valve body, and the valve cavity is communicated with the first water outlet. The valve cavity comprises a water inlet, a first outer hole and a second outer hole; the electromagnetic valve comprises a movable valve element, the movable valve element is arranged in the valve cavity, the movable valve element comprises a first inner hole corresponding to the first outer hole and a second inner hole corresponding to the second outer hole, a first water outlet is formed in the overlapped part of the first outer hole and the first inner hole, and a second water outlet is formed in the overlapped part of the second outer hole and the second inner hole; the movable valve element can linearly move along the valve cavity so that the first inner hole and the second inner hole can move relative to the first outer hole and the second outer hole to change the area of the first water outlet and the area of the second water outlet. The complexity of a water servo structure is simplified, the problem of insufficient hot water temperature is solved, and the user experience is improved.

Description

Technical Field

[0001] This utility model relates to the field of water heaters, and in particular to a water servo structure for a gas water heater and a gas water heater. Background Technology

[0002] As people's living standards continue to improve, water heaters, as essential household appliances, have received widespread attention for their performance and user experience. In existing water heater technology, a bypass pipe is typically used to achieve zero cold water functionality. While this design solves the problem of cold water waste to some extent, it suffers from insufficient hot water temperature during actual use, significantly impacting the user's water experience.

[0003] To improve this situation, the industry has begun incorporating water servo components into water heater systems to regulate water flow and enhance the user experience. However, existing water servo solutions have several shortcomings. First, their function is relatively limited, only adjusting the inlet water flow, failing to fully meet the complex needs of water heaters under different operating conditions. Second, existing water servo structures are quite complex, which not only increases manufacturing costs and installation difficulty but may also lead to higher failure rates and reduced overall reliability of the water heater.

[0004] In view of the problems existing in the above-mentioned prior art, this solution proposes a brand-new water servo control technology, which aims to achieve precise adjustment of the inlet water flow and bypass flow of the water heater by optimizing the structural and functional design, thereby effectively solving the problem of insufficient hot water temperature and improving the user's water use experience. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing water servo schemes, which have relatively simple functions and complex structures, as well as the insufficient hot water temperature of zero-cold-water water heaters, and to provide a water servo structure for gas water heaters and a gas water heater.

[0006] The present invention solves the above-mentioned technical problems through the following technical solution:

[0007] A water servo structure for a gas water heater, the water servo structure being disposed within the gas water heater, the water servo structure including an inlet, a first outlet, and a second outlet, the first outlet being connected to the inlet pipe of the gas water heater, and the second outlet being connected to a bypass pipe of the gas water heater, comprising:

[0008] The valve body has a valve cavity, which includes an inlet, a first outer hole, and a second outer hole.

[0009] The solenoid valve includes a movable valve core disposed in the valve cavity. The movable valve core includes a first inner hole corresponding to the first outer hole and a second inner hole corresponding to the second outer hole. The overlapping portion of the first outer hole and the first inner hole forms the first outlet, and the overlapping portion of the second outer hole and the second inner hole forms the second outlet.

[0010] The movable valve core can move linearly along the valve cavity so that the first inner hole and the second inner hole move relative to the first outer hole and the second outer hole to change the area of ​​the first outlet and the second outlet.

[0011] In this solution, the aforementioned structure, through the ingenious design of the valve body, valve chamber, and solenoid valve, achieves precise control of the inlet and bypass flow rates. The movable valve core of the solenoid valve can move linearly within the valve chamber, changing the area of ​​the first and second outlets, thereby flexibly adjusting the inlet and bypass flow rates. Compared to existing technologies, this design simplifies the complexity of the water servo structure, reduces the number of parts and assembly difficulty, lowers manufacturing costs and failure rates, improves system reliability and stability, effectively solves the problem of insufficient hot water temperature, and enhances the user's water experience.

[0012] Preferably, the area of ​​the first outer hole and / or the first inner hole is greater than the area of ​​the second outer hole and / or the second inner hole.

[0013] In this solution, the aforementioned structure, by setting the area of ​​the first outer hole and the first inner hole to be larger than the area of ​​the second outer hole and the second inner hole, allows more water to preferentially flow through the heat exchanger for heating under normal operating conditions, ensuring that the outlet water temperature meets basic requirements. Simultaneously, it accommodates water flow through the bypass pipe, achieving stability and efficiency in hot water supply. This design further optimizes the function of the water servo structure, improves the efficiency and quality of hot water supply, and enhances the performance of the water heater and the user experience.

[0014] Preferably, the movable valve core can be rotated to change sequentially between the first state, the second state, and the third state;

[0015] In the first state, the first inner hole and the first outer hole completely overlap, and the second inner hole and the second outer hole completely overlap;

[0016] In the second state, the first inner hole and the first outer hole partially overlap, and the second inner hole and the second outer hole partially overlap.

[0017] In the third state, the first inner hole and the first outer hole partially overlap, while the second inner hole and the second outer hole do not overlap.

[0018] In this solution, the aforementioned structure allows the movable valve core to sequentially change between three states—first, second, and third—driven by a solenoid valve. This provides multiple operating modes and enhances the adaptability and flexibility of the water servo structure. Under different water usage scenarios, the operating state can be flexibly switched according to actual needs, achieving precise adjustment of the inlet and bypass flow rates. For example, in the first state, water flow is normally distributed to meet regular water usage requirements; in the second state, the flow rate can be initially adjusted to accommodate lower outlet water temperatures; in the third state, the bypass passage is completely closed, ensuring all inlet water flows through the heat exchanger for heating, further increasing the outlet water temperature. This multi-state design reduces the use of complex structures, achieving multiple functions through simple component movements, lowering assembly difficulty and manufacturing costs, while simultaneously improving the system's intelligence and control precision. It better addresses different water usage scenarios and temperature requirements, enhancing user satisfaction.

[0019] Preferably, the solenoid valve further includes a coil assembly for driving the movement of the movable valve core.

[0020] In this solution, the aforementioned structure provides a stable driving force for the movement of the movable valve core through the solenoid valve coil assembly, ensuring the normal operation and precise control of the water servo structure. The coil assembly design enables the movable valve core to respond quickly and accurately to control signals, achieving real-time adjustment of the inlet and bypass flow rates. This design simplifies the drive unit structure, reduces manufacturing costs and failure rates, improves system reliability and stability, and facilitates more precise outlet water temperature control.

[0021] Preferably, the water servo structure further includes a water flow sensor and a temperature sensor disposed within the valve body;

[0022] When the water flow sensor detects that the water flow rate in the valve body is greater than the preset flow rate, and the temperature sensor detects that the water temperature in the valve body is lower than the preset temperature, the coil assembly drives the movable valve core to move and change from the first state to the second state and the third state in sequence.

[0023] In this design, the aforementioned structure, along with the placement of water flow and temperature sensors, enables real-time monitoring of water flow and temperature, enhancing the system's intelligence and control precision. When excessive flow and excessively low temperature are detected, the coil assembly promptly drives the movable valve core to switch operating states, automatically adjusting the inlet and bypass flow rates. This automatic adjustment function reduces signal delay and errors, improving the real-time performance and accuracy of control, thus facilitating more precise control of the water heater. Simultaneously, this design avoids complex feedback control circuits and the use of multiple sensors, simplifying the structure, reducing manufacturing costs and failure rates, and improving system reliability and stability, providing users with a more stable and comfortable hot water supply.

[0024] Preferably, the water flow sensor and the temperature sensor are disposed in the valve body near the water inlet.

[0025] In this design, the aforementioned structure places the water flow sensor and temperature sensor within the valve body near the inlet. This allows for faster and more accurate detection of the water flow and temperature entering the water heater, providing timely feedback to the control system for rapid response and adjustment. This layout reduces signal transmission distance and interference, improving detection accuracy and reliability. Furthermore, positioning them at the inlet separates them from the moving valve core, preventing interference with its arrangement and operation. This simplifies the structural design, reduces mutual interference between components, and enhances system stability and reliability, ultimately facilitating more precise control of the water heater.

[0026] Preferably, the movable valve core includes a cylindrical body, which is coaxially arranged with the valve body and nested in the valve cavity. The cylindrical body is open on the side facing the water inlet. The peripheral wall of the cylindrical body has a first inner hole and a second inner hole. The cavity wall of the valve cavity that contacts the cylindrical body has a first outer hole and a second outer hole.

[0027] In this design, the aforementioned structure, with its cylindrical design for the movable valve core, allows the valve core to be coaxially aligned with the valve body and nested within the valve cavity. This compact and rational structure reduces the volume and space occupied by the water servo structure, facilitating installation and arrangement within the gas water heater. Simultaneously, the cylindrical structure ensures smoother water flow within the valve cavity, reducing flow resistance and improving the efficiency and accuracy of water flow regulation. Furthermore, the cylindrical body is open on the side facing the inlet, with a first and second inner hole on its circumferential wall. The cavity wall in contact with the cylindrical body has a first and second outer hole. This design further simplifies the structure, reduces the number of parts and assembly difficulty, lowers manufacturing costs and failure rates, and improves the reliability and stability of the system.

[0028] Preferably, a sealing ring is provided between the circumferential direction of the cylinder and the cavity wall of the valve chamber; and / or,

[0029] The coil assembly is connected to the valve body using screws.

[0030] In this design, the aforementioned structure, with a sealing ring placed between the circumferential surface of the cylinder and the cavity wall of the valve chamber, effectively prevents water leakage, ensures the sealing performance of the water servo structure, improves system reliability and safety, and avoids malfunctions and safety hazards caused by leakage. The coil assembly is connected to the valve body using screws, a simple and reliable connection method that facilitates installation and disassembly. During production and maintenance, the coil assembly can be quickly fixed to the valve body or replaced, improving production efficiency and maintenance convenience, reducing production and maintenance costs, and ensuring the stability of the connection between the coil assembly and the valve body, thus ensuring the normal operation of the system. This design further simplifies the structure, reduces assembly difficulty, and improves the reliability and stability of the system.

[0031] Preferably, the solenoid valve further includes a return spring capable of driving the movable valve core to a return position; and / or,

[0032] The solenoid valve also includes a reset magnetic element, which can drive the movable valve core to reset.

[0033] In this solution, the aforementioned structure and the design of the solenoid valve's return spring or magnetic reset component enable the movable valve core to reset, ensuring that the water servo structure can return to its initial state in the event of a power outage or malfunction, thus improving the system's safety and reliability. The return spring or magnetic reset component allows the movable valve core to automatically return to its default position when not driven by electromagnetic force, guaranteeing the normal operation and stability of the water servo structure. This design simplifies the reset device structure, reduces manufacturing costs and failure rates, and improves system reliability and stability, ultimately enhancing the water heater's safety performance and lifespan.

[0034] A gas water heater includes a water servo structure for a gas water heater as described above.

[0035] In this solution, the gas water heater employs the aforementioned optimized water servo structure, effectively addressing the existing problems in hot water temperature control and flow regulation. Through the precise control of the water servo structure, the water heater can flexibly adjust the inlet and bypass flow rates according to actual water usage needs, ensuring stable and comfortable outlet water temperature and improving the user experience. Simultaneously, the simplified design of the water servo structure reduces manufacturing costs and failure rates, improves system reliability and stability, enhances the market competitiveness of gas water heaters, and provides users with a higher-quality, more efficient, and more comfortable hot water solution.

[0036] The significant advantages of this invention are as follows: This invention discloses a water servo structure for a gas water heater and a gas water heater in general. The water servo structure, through the ingenious design of the valve body, valve chamber, and solenoid valve, achieves precise control of the inlet and bypass flow rates. The movable valve core of the solenoid valve can move linearly within the valve chamber, changing the area of ​​the first and second outlets, thereby flexibly adjusting the inlet and bypass flow rates. Compared to existing technologies, this design simplifies the complexity of the water servo structure, reduces the number of parts and assembly difficulty, lowers manufacturing costs and failure rates, improves system reliability and stability, effectively solves the problem of insufficient hot water temperature, and enhances the user's water experience. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of a gas water heater according to an embodiment of the present utility model.

[0038] Figure 2 This is a schematic diagram of the water servo structure in the first state according to Embodiment 1 of this utility model.

[0039] Figure 3 This is a schematic diagram of the water servo structure in the second state of Embodiment 1 of this utility model.

[0040] Figure 4 This is a schematic diagram of the water servo structure in the third state of Embodiment 1 of this utility model.

[0041] Figure 5 This is a schematic diagram of the water servo structure in the first state of Embodiment 2 of this utility model.

[0042] Figure 6 This is a schematic diagram of the water servo structure in the second state of Embodiment 2 of this utility model.

[0043] Figure 7 This is a schematic diagram of the water servo structure in the third state of Embodiment 2 of this utility model.

[0044] Explanation of reference numerals in the attached figures:

[0045] Gas water heater 200

[0046] Water inlet pipe 201

[0047] Bypass pipe 202

[0048] Water Servo Structure 1

[0049] Valve body 10

[0050] Valve chamber 101

[0051] Inlet 12

[0052] First outlet 13

[0053] First outer hole 103

[0054] Second outer hole 104

[0055] Second outlet 14

[0056] Active valve core 11

[0057] Cover 111

[0058] Zhoubi 112

[0059] First inner hole 113

[0060] Second inner hole 114

[0061] Sealing ring 115

[0062] Coil assembly 15

[0063] Return spring 16

[0064] Flow sensor 17 Detailed Implementation

[0065] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0066] Example 1

[0067] like Figure 1 As shown, this embodiment also provides a gas water heater 200, which includes a water servo structure 1.

[0068] like Figures 1 to 4As shown, this embodiment provides a water servo structure 1 for a gas water heater. The water servo structure 1 is installed inside the gas water heater 200. The water servo structure 1 includes an inlet 12, a first outlet 13 and a second outlet 14. The first outlet 13 is connected to the inlet pipe 201 of the gas water heater 200, and the second outlet 14 is connected to the bypass pipe 202 of the gas water heater 200. It also includes a valve body 10 and a movable valve core 11. The valve body 10 has a valve cavity 101, which includes an inlet 12, a first outer hole 103 and a second outer hole 104. The system also includes a solenoid valve, which comprises a movable valve core 11 and a coil assembly 15. The movable valve core 11 is disposed within the valve cavity 101. The movable valve core 11 includes a first inner hole 113 corresponding to a first outer hole 103 and a second inner hole 114 corresponding to a second outer hole 104. The overlapping portion of the first outer hole 103 and the first inner hole 113 forms a first outlet 13, and the overlapping portion of the second outer hole 104 and the second inner hole 114 forms a second outlet 14. The movable valve core 11 can move linearly along the valve cavity 101, causing the first inner hole 113 and the second inner hole 114 to move relative to the first outer hole 103 and the second outer hole 104, thereby changing the area of ​​the first outlet 13 and the second outlet 14.

[0069] Specifically, during use, the water servo structure 1 is installed at the water inlet of the gas water heater 200. After the water flows into the cavity of the water servo structure 1, it flows out through two routes: the overlapping part of the first outer hole 103 and the first inner hole 113 (i.e., the first water outlet 13) and the overlapping part of the second outer hole 104 and the second inner hole 114 (i.e., the second water outlet 14). The routes are as follows: Figure 2 As shown. When the movable valve core 11 moves, the first inner hole 113 and the second inner hole 114 move synchronously, causing them to be misaligned relative to the first outer hole 103 and the second outer hole 104, thereby reducing the flow area between them and reducing the water flow.

[0070] The first outlet 13 is directly connected to the inlet pipe 201 of the gas water heater 200, and the water flows through this route to the heat exchanger of the gas water heater 200 for heating. The second outlet 14 is connected to the bypass water circuit, and the water flows into the bypass water circuit from here.

[0071] The water servo structure 1 of this solution is relatively simple, mainly composed of components such as valve body 10 and movable valve core 11. Compared with the existing complex water servo structures, it reduces the number of parts and assembly difficulty, lowers manufacturing costs and failure rates, and improves system reliability and stability, which is beneficial for large-scale production and application. Through the design of the movable valve core 11, the area of ​​the first outlet 13 and the second outlet 14 can be precisely controlled according to the water flow rate and outlet temperature, realizing dynamic adjustment of the inlet flow rate and bypass flow rate. When the water flow rate is too high and the outlet temperature is lower than the set temperature, the area of ​​the bypass pipe 202 and the inlet pipe 201 is reduced, gradually decreasing the inlet flow rate and bypass flow rate to ensure that the hot water is fully heated and meets the user's hot water temperature requirements. This provides users with a more stable and comfortable hot water experience, solving the problem of insufficient hot water temperature affecting user experience in existing water heaters.

[0072] like Figure 2 As shown, the areas of the first outer hole 103 and the first inner hole 113 are larger than the areas of the second outer hole 104 and the second inner hole 114. By setting the areas of the first outer hole 103 and / or the first inner hole 113 to be larger than the areas of the second outer hole 104 and / or the second inner hole 114, under normal operating conditions, more water can preferentially flow through the heat exchanger for heating, ensuring that the outlet water temperature meets basic requirements. At the same time, it also takes into account the water flow in the bypass pipe 202, achieving stability and efficiency in hot water supply, and further improving the user's water experience.

[0073] Since the first inlet 12 and the second inlet 12 are formed by the overlap of the outer hole and the inner hole, in other embodiments, the actual flow area is determined by the smaller of the outer hole and the inner hole. Therefore, it is sufficient to ensure the size ratio between the smaller outer hole or the inner hole.

[0074] like Figures 2 to 4 As shown, the movable valve core 11 can change sequentially through movement into the first state, the second state, and the third state.

[0075] Among them, the first state Figure 2 As shown. In the first state, the first inner hole 113 and the first outer hole 103 completely overlap, and the second inner hole 114 and the second outer hole 104 completely overlap. Both water passages are at maximum flow rate. Water flow is normally distributed, meeting routine water usage needs.

[0076] Among them, the second state Figure 3As shown. In the second state, the first inner hole 113 and the first outer hole 103 partially overlap, and the second inner hole 114 and the second outer hole 104 partially overlap. The second state is executed when the outlet water temperature is low. At this time, the movable valve core 11 moves at a certain angle, which reduces the flow area of ​​both the first outlet 13 and the second outlet 14. This initially adjusts the flow rate when the outlet water temperature is low, reducing the water flow entering the water heater and the bypass passage, thus making the outlet water temperature of the water heater higher.

[0077] Among them, the third state Figure 4 As shown. In the third state, the first inner hole 113 and the first outer hole 103 partially overlap, while the second inner hole 114 and the second outer hole 104 do not overlap. In the third state, if the water heater outlet temperature is still low after adjustment, the bypass passage is completely sealed, so that all the incoming water flows through the heat exchanger for heating, effectively increasing the outlet water temperature and meeting the user's higher requirements for hot water temperature.

[0078] This design allows the movable valve core 11 to have multiple working states, enabling flexible adjustment of the inlet water flow and bypass flow according to actual needs without reducing the hot water flow, thus enhancing the adaptability and flexibility of the water heater.

[0079] like Figure 2 As shown, the water servo structure 1 also includes a coil assembly 15, which drives the movable valve core 11 to move, enabling precise drive control of the movable valve core 11. The coil assembly 15 of the solenoid valve provides a stable driving force for the movement of the movable valve core 11, ensuring the normal operation and precise control of the water servo structure 1. The design of the coil assembly 15 allows the movable valve core to respond quickly and accurately to control signals, achieving real-time adjustment of the inlet flow rate and bypass flow rate. This design simplifies the structure of the drive device, reduces manufacturing costs and failure rate, improves the reliability and stability of the system, and facilitates more precise outlet water temperature control.

[0080] like Figure 2 As shown, the water servo structure 1 also includes a water flow sensor 17 and a temperature sensor disposed within the valve body 10. When the water flow sensor 17 detects that the water flow rate within the valve body 10 is greater than a preset flow rate, and the temperature sensor detects that the water temperature within the valve body 10 is lower than a preset temperature, the coil assembly 15 drives the movable valve core 11 to move and sequentially change from the first state to the second state and the third state.

[0081] Specifically, in this embodiment, the temperature sensor is integrated into the water flow sensor 17, making it smaller and more integrated. In other embodiments, they can also be set separately.

[0082] The water flow sensor 17 and temperature sensor enable real-time monitoring of water flow and temperature. When excessive water flow and excessively low temperature are detected, the movable valve core 11 is driven to move and switch states, thereby automatically adjusting the inlet water flow and bypass flow. This allows the water heater to respond quickly and adjust its operating state, ensuring that the outlet water temperature meets the set requirements. This improves the system's intelligence and control accuracy, providing users with a more stable and comfortable hot water supply.

[0083] like Figure 2 As shown, the water flow sensor 17 and the temperature sensor are located inside the valve body 10 near the water inlet 12. Positioning the water flow sensor 17 and the temperature sensor inside the valve body 10 near the water inlet 12 allows for faster and more accurate detection of the water flow rate and temperature entering the water heater. This timely feedback to the control system enables a rapid response and adjustment, reducing signal delay and errors, improving the real-time performance and accuracy of control, and facilitating more precise control of the water heater. Furthermore, positioning them at the water inlet 12 also separates them from the movable valve core 11, ensuring that they do not affect or interfere with the arrangement and operation of the movable valve core 11.

[0084] like Figure 2 As shown, the movable valve core 11 includes a cylindrical body, which is coaxially arranged with and nested within the valve body 10. The cylindrical body is open on the side facing the water inlet 12. The peripheral wall 112 of the cylindrical body has a first inner hole 113 and a second inner hole 114. The cavity wall of the valve body 10 in contact with the cylindrical body has a first outer hole 103 and a second outer hole 104. The movable valve core 11 adopts a cylindrical structure and is coaxially arranged with and nested within the valve body 10. This structural design is compact and reasonable, which helps to reduce the volume and space occupied by the water servo structure 1, and facilitates its installation and arrangement within the gas water heater 200. At the same time, the cylindrical structure ensures smoother water flow within the valve cavity 101, reduces water flow resistance, and improves the efficiency and accuracy of water flow regulation.

[0085] like Figure 2 As shown, the cylinder includes a cover 111, and a peripheral wall 112 connects to the cover 111. The cover 111 separates the inner side of the valve body 10 from the coil assembly 15. A sealing ring 115 is provided between the cover 111 and the cavity wall of the valve body 10. The design of the cover 111 not only separates the inner side of the valve body 10 from the coil assembly 15, providing a certain degree of protection and preventing water flow from damaging the coil assembly 15, but also effectively prevents water leakage by providing a sealing ring 115 between the cover 111 and the cavity wall of the valve body 10. This ensures the sealing performance of the water servo structure 1, improves the reliability and safety of the system, and avoids malfunctions and safety hazards caused by water leakage.

[0086] like Figure 2As shown, the coil assembly 15 is connected to the valve body 10 using screws. Using screws to connect the coil assembly 15 and the valve body 10 is a simple and reliable connection method, facilitating installation and disassembly. During production and maintenance, the coil assembly 15 can be quickly fixed to the valve body 10 or replaced, improving production efficiency and maintenance convenience, reducing production and maintenance costs, and ensuring the stability of the connection between the coil assembly 15 and the valve body 10, thus ensuring the normal operation of the system.

[0087] like Figures 2 to 4 As shown, the solenoid valve also includes a return spring 16, which drives the movable valve core 11 to reset. The return spring design of the solenoid valve drives the movable valve core to reset, ensuring that the water servo structure can return to its initial state in the event of a power outage or malfunction, thus improving the safety and reliability of the system. The return spring allows the movable valve core to automatically return to its default position when not driven by electromagnetic force, ensuring the normal operation and stability of the water servo structure. This design simplifies the structure of the reset device, reduces manufacturing costs and failure rate, improves the reliability and stability of the system, and contributes to improving the safety performance and service life of the water heater.

[0088] Specifically, the return spring 16 is positioned low on the peripheral wall 112 of the cylinder. When the coil assembly 15 drives the movable valve core 11 to move, the return spring 16 is compressed by force. When the coil assembly 15 is not activated, the return spring drives the movable valve core 11 to reset.

[0089] Example 2

[0090] The water servo structure 1 in this embodiment is largely the same as that in embodiment 1, except for the reset structure. In this embodiment, a reset magnetic component 162 is used for the reset structure, and its structure is as follows: Figures 5 to 7 As shown. Specifically, the reset magnetic component 162 includes two magnetic assemblies, which are respectively fixed on the peripheral wall 112 of the cylinder and the cavity wall of the valve chamber 101. The two magnetic assemblies are arranged to repel each other. When the coil assembly 15 drives the movable valve core 11 to move, the two magnetic assemblies move closer to each other, increasing the repulsive force. When the coil assembly 15 is not activated, the two magnetic assemblies move away from each other under the action of repulsive force and push the movable valve core 11 to reset.

Claims

1. A water servo structure for a gas water heater, the water servo structure being disposed within the gas water heater, the water servo structure comprising an inlet, a first outlet, and a second outlet, the first outlet being connected to the inlet pipe of the gas water heater, and the second outlet being connected to a bypass pipe of the gas water heater, characterized in that... It includes: The valve body has a valve cavity, which includes an inlet, a first outer hole, and a second outer hole. The solenoid valve includes a movable valve core disposed in the valve cavity. The movable valve core includes a first inner hole corresponding to the first outer hole and a second inner hole corresponding to the second outer hole. The overlapping portion of the first outer hole and the first inner hole forms the first outlet, and the overlapping portion of the second outer hole and the second inner hole forms the second outlet. The movable valve core can move linearly along the valve cavity so that the first inner hole and the second inner hole move relative to the first outer hole and the second outer hole to change the area of ​​the first outlet and the second outlet.

2. The water servo structure for a gas water heater as described in claim 1, characterized in that, The area of ​​the first outer hole and / or the first inner hole is greater than the area of ​​the second outer hole and / or the second inner hole.

3. The water servo structure for a gas water heater as described in claim 2, characterized in that, The movable valve core can be rotated to change sequentially between a first state, a second state, and a third state. In the first state, the first inner hole and the first outer hole completely overlap, and the second inner hole and the second outer hole completely overlap; In the second state, the first inner hole and the first outer hole partially overlap, and the second inner hole and the second outer hole partially overlap. In the third state, the first inner hole and the first outer hole partially overlap, while the second inner hole and the second outer hole do not overlap.

4. The water servo structure for a gas water heater as described in claim 1, characterized in that, The solenoid valve also includes a coil assembly for driving the movement of the movable valve core.

5. The water servo structure for a gas water heater as described in claim 4, characterized in that, The water servo structure also includes a water flow sensor and a temperature sensor disposed in the valve body. When the water flow sensor detects that the water flow rate in the valve body is greater than the preset flow rate, and the temperature sensor detects that the water temperature in the valve body is lower than the preset temperature, the coil assembly drives the movable valve core to move and change from the first state to the second state and the third state in sequence.

6. The water servo structure for a gas water heater as described in claim 5, characterized in that, The water flow sensor and the temperature sensor are located in the valve body near the water inlet.

7. The water servo structure for a gas water heater as described in claim 1, characterized in that, The movable valve core includes a cylindrical body, which is coaxially arranged with the valve body and nested in the valve cavity. The cylindrical body is open on the side facing the water inlet. The peripheral wall of the cylindrical body has a first inner hole and a second inner hole. The cavity wall of the valve cavity that contacts the cylindrical body has a first outer hole and a second outer hole.

8. The water servo structure for a gas water heater as described in claim 7, characterized in that, A sealing ring is provided between the circumferential direction of the cylinder and the cavity wall of the valve chamber; and / or, The solenoid valve also includes a coil assembly, which is connected to the valve body using screws.

9. The water servo structure for a gas water heater as described in claim 1, characterized in that, The solenoid valve further includes a return spring, which is capable of driving the movable valve core to return to its original position; and / or The solenoid valve also includes a reset magnetic element, which can drive the movable valve core to reset.

10. A gas-fired water heater, characterized in that, It includes a water servo structure for a gas water heater as described in any one of claims 1 to 9.

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