Water servo structure for gas water heater and gas water heater

Abstract

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, the water servo structure comprises a valve body, a valve cavity is formed in the valve body, and the valve cavity is communicated with the valve body. The valve cavity comprises a water inlet, a first outer hole and a second outer hole; the rotary valve element is arranged in the valve cavity, the rotary 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 rotary valve element can drive the first inner hole and the second inner hole to rotate relative to the first outer hole and the second outer hole through rotation so as to change the area of the first water outlet and the area of the second water outlet, the structure is relatively simple, and more stable and comfortable hot water use experience can be provided.

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] A rotary valve core is disposed in the valve cavity. The rotary 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 rotary valve core can rotate to cause the first inner hole and the second inner hole to rotate relative to the first outer hole and the second outer hole, thereby changing the area of ​​the first outlet and the second outlet.

[0011] This solution employs the aforementioned structure, resulting in a relatively simple water servo structure primarily composed of a valve body and a rotary valve core. Compared to existing complex water servo structures, it reduces the number of components and assembly difficulty, lowers manufacturing costs and failure rates, and improves system reliability and stability, facilitating large-scale production and application. The rotary valve core design allows for precise control of the areas of the first and second outlets based on water flow and outlet temperature, enabling dynamic adjustment of the inlet and bypass flow rates. When the water flow is too high and the outlet temperature is lower than the set temperature, the areas of the bypass and inlet pipes are reduced, gradually decreasing the inlet and bypass flow rates to ensure sufficient heating of the hot water and meet the user's hot water temperature requirements. This provides users with a more stable and comfortable hot water experience, resolving the problem of insufficient hot water temperature in existing water heaters that negatively impacts user 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 above structure is adopted. By setting the area of ​​the first outer hole and / or the first inner hole to be larger than the area of ​​the second outer hole and / or the second inner hole, more water can be prioritized to flow through the heat exchanger for heating under normal working conditions, ensuring that the outlet water temperature can meet the basic requirements. At the same time, the water flow in the bypass pipe is also taken into account, so as to achieve the stability and efficiency of hot water supply and further improve the user's water experience.

[0014] Preferably, the rotary 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 rotary valve core to operate in multiple states, enabling flexible adjustment of the inlet and bypass flow rates according to actual needs. In the first state, water flow is normally distributed to meet regular water usage requirements. In the second state, when the outlet water temperature is low, the flow rate can be initially adjusted to reduce the water flow into the water heater and bypass, resulting in a higher outlet water temperature. In the third state, if the outlet water temperature remains low after adjustment, the bypass is completely closed, ensuring all inlet water flows through the heat exchanger for heating, effectively increasing the outlet water temperature to meet users' higher hot water temperature requirements without reducing the hot water flow rate, thus enhancing the adaptability and flexibility of the water heater.

[0019] Preferably, the water servo structure further includes a stator coil and a corresponding rotor, the rotor being connected to the rotary valve core, and the stator coil and the rotor being able to drive the rotary valve core to rotate.

[0020] In this solution, the aforementioned structure is adopted. The stator coil and corresponding rotor in this water servo structure are connected to the rotary valve core, enabling precise drive control of the rotary valve core. Through the electromagnetic drive of the stator coil and rotor, the rotary valve core can rotate according to a preset program and instructions, thereby changing the area of ​​the first and second water outlets and achieving precise adjustment of the inlet and bypass flow rates. This drive method features fast response speed and high control precision, ensuring stable and reliable operation of the water servo structure under various working conditions. It meets the precise control requirements of water heaters for hot water temperature and flow, improving the performance and user experience of the entire water heater system.

[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 stator coil and the rotor drive the rotary valve core to rotate and change from the first state to the second state and the third state in sequence.

[0023] In this solution, the aforementioned structure, along with the inclusion of water flow and temperature sensors, enables real-time monitoring of water flow and temperature. When excessive water flow and excessively low temperature are detected, the rotary valve core is driven to rotate and switch states, thereby automatically adjusting the inlet and bypass flow rates. This allows the water heater to respond quickly and adjust its operating status, ensuring that the outlet water temperature meets the set requirements. This improves the system's intelligence and control precision, providing users with a more stable and comfortable hot water supply.

[0024] Preferably, the water flow sensor and the temperature sensor are located 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. This enables the system to respond and adjust quickly, reducing signal delay and errors, and improving the real-time performance and accuracy of control. This facilitates more precise control of the water heater. Furthermore, placing them at the inlet also separates them from the rotary valve core, ensuring they do not interfere with the arrangement and operation of the rotary valve core.

[0026] Preferably, the rotary valve core includes a cylindrical body, which is coaxially arranged with the valve body and nested within the valve body. 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 body that contacts the cylindrical body has a first outer hole and a second outer hole.

[0027] In this design, the aforementioned structure is adopted, with the rotary valve core featuring a cylindrical structure that is coaxially mounted and nested within the valve body. This compact and rational design helps reduce 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 water flow resistance and improving the efficiency and accuracy of water flow regulation.

[0028] Preferably, the cylinder includes a cover, the peripheral wall is connected to the cover, the rotor is fixedly connected to the cover, and the cover separates the inner side of the valve body and the stator coil;

[0029] A sealing ring is provided between the circumferential part of the cover and the cavity wall of the valve body.

[0030] In this design, the aforementioned structure not only separates the inner side of the valve body from the stator coil, providing protection against water damage, but also provides a mounting and securing position for the rotor. The sealing ring between the cover and the valve body cavity wall effectively prevents leakage, ensuring the sealing performance of the water servo structure, improving system reliability and safety, and avoiding malfunctions and safety hazards caused by leakage.

[0031] Preferably, the stator coil is connected to the valve body using screws.

[0032] In this solution, the aforementioned structure is adopted, using screws to connect the stator coil to the valve body. This connection method is simple, reliable, and facilitates installation and disassembly. During production and maintenance, the stator coil 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 stator coil and the valve body, thus ensuring the normal operation of the system.

[0033] Preferably, the rotor and the cover are connected by in-mold injection molding.

[0034] In this design, the rotor and cover are connected using an in-mold injection molding process, which ensures a tight connection between them, improving connection strength and stability. The in-mold injection molding process integrates the rotor and cover during molding, preventing malfunctions and safety hazards caused by loose connections. It also improves production efficiency and product quality, ensuring the water servo structure maintains good performance and reliability over long-term use.

[0035] A gas water heater includes a water servo structure for a gas water heater as described in any of the preceding claims.

[0036] In this solution, the aforementioned structure is adopted, and the water servo structure is applied to a gas water heater. This effectively solves the problem of insufficient hot water temperature in existing gas water heaters, improving the performance and user experience of the water heater. The water servo structure achieves precise control of the outlet water temperature by accurately adjusting the inlet and bypass flow rates, meeting users' needs for both hot water temperature and volume, enhancing the market competitiveness of gas water heaters, and providing users with a higher quality, more efficient, and more comfortable hot water solution.

[0037] The positive and progressive effects of this utility model are as follows: This utility model discloses a water servo structure for a gas water heater and a gas water heater in general. The water servo structure of this solution is relatively simple, mainly composed of a valve body, a rotary valve core, and other components. Compared with the existing complex water servo structures, it reduces the number of components and assembly difficulty, lowers manufacturing costs and failure rates, and improves the reliability and stability of the system, which is beneficial for large-scale production and application. Through the design of the rotary valve core, the area of ​​the first and second water outlets 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 and the inlet pipe is reduced, gradually reducing the inlet flow rate and bypass flow rate, ensuring that the hot water can be fully heated to meet the user's hot water temperature requirements. This provides users with a more stable and comfortable hot water experience and solves the problem of insufficient hot water temperature in existing water heaters affecting user experience. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of a gas water heater according to an embodiment of the present utility model.

[0039] Figure 2 This is a schematic diagram of the water servo structure in the first state according to an embodiment of the present invention.

[0040] Figure 3 This is a schematic diagram of the water servo structure in the second state according to an embodiment of the present invention.

[0041] Figure 4 This is a schematic diagram of the water servo structure in the third state according to an embodiment of the present invention.

[0042] Explanation of reference numerals in the attached figures:

[0043] Gas water heater 200

[0044] Water inlet pipe 201

[0045] Bypass pipe 202

[0046] Water Servo Structure 1

[0047] Valve body 10

[0048] Valve chamber 101

[0049] Inlet 12

[0050] First outlet 13

[0051] First outer hole 103

[0052] Second outer hole 104

[0053] Second outlet 14

[0054] Rotary valve core 11

[0055] Cover 111

[0056] Zhoubi 112

[0057] First inner hole 113

[0058] Second inner hole 114

[0059] Sealing ring 115

[0060] Rotor 15

[0061] Stator coil 16

[0062] Water flow sensor 17 Detailed Implementation

[0063] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0064] like Figure 1 As shown, this embodiment also provides a gas water heater 200, which includes a water servo structure 1.

[0065] like Figures 1 to 4 As shown, this embodiment provides a water servo structure 1 for a gas water heater. The water servo structure 1 is disposed within 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 rotary valve core 11. The valve body 10 has a valve cavity 101, which includes the inlet 12, a first outer hole 103, and a second outer hole 104. The rotary valve core 11 is disposed within the valve cavity 101. The rotary valve core 11 includes a first inner hole 113 corresponding to the first outer hole 103 and a second inner hole 114 corresponding to the second outer hole 104. The overlapping portion of the first outer hole 103 and the first inner hole 113 forms the first outlet 13, and the overlapping portion of the second outer hole 104 and the second inner hole 114 forms the second outlet 14. The rotary valve core 11 can rotate to drive the first inner hole 113 and the second inner hole 114 to rotate 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.

[0066] 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 rotary valve core 11 rotates, the first inner hole 113 and the second inner hole 114 rotate synchronously, causing them to be misaligned relative to the first outer hole 103 and the second outer hole 104, thereby reducing the flow area of ​​the two and reducing the water flow.

[0067] 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.

[0068] The water servo structure 1 of this solution is relatively simple, mainly composed of components such as valve body 10 and rotary valve core 11. Compared with the existing complex water servo structures, it reduces the number of components 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 rotary 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, achieving 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.

[0069] 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.

[0070] 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.

[0071] like Figures 2 to 4 As shown, the rotary valve core 11 can change sequentially into a first state, a second state, and a third state by rotation.

[0072] 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.

[0073] 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 rotary valve core 11 rotates at a certain angle, which reduces the flow area of ​​both the first outlet 13 and the second outlet 14. This initially regulates the flow rate when the outlet water temperature is low, reducing the water flow entering the water heater and the bypass passage, thus resulting in a higher outlet water temperature from the water heater.

[0074] 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.

[0075] This design allows the rotary valve core 11 to have multiple working states, enabling flexible adjustment of the inlet and bypass flow rates according to actual needs without reducing the hot water flow, thus enhancing the adaptability and flexibility of the water heater.

[0076] like Figure 2 As shown, the water servo structure 1 also includes a stator coil 16 and a corresponding rotor 15. The rotor 15 is connected to the rotary valve core 11, and the stator coil 16 and rotor 15 can drive the rotary valve core 11 to rotate. The stator coil 16 and corresponding rotor 15 in the water servo structure 1, connected to the rotary valve core 11, enable precise drive control of the rotary valve core 11. Through the electromagnetic drive of the stator coil 16 and rotor 15, the rotary valve core 11 can rotate according to a preset program and instructions, thereby changing the area of ​​the first outlet 13 and the second outlet 14, achieving precise adjustment of the inlet flow rate and bypass flow rate. This drive method has a fast response speed and high control precision, ensuring that the water servo structure 1 operates stably and reliably under various working conditions, meeting the precise control requirements of the water heater for hot water temperature and flow rate, and improving the performance and user experience of the entire water heater system.

[0077] 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 the preset flow rate, and the temperature sensor detects that the water temperature within the valve body 10 is lower than the preset temperature, the stator coil 16 and the rotor 15 drive the rotating valve core 11 to rotate and change sequentially from the first state to the second state and the third state.

[0078] 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.

[0079] 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 rotary valve core 11 is driven to rotate and switch states, thereby automatically adjusting the inlet and bypass flow rates. 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.

[0080] 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 rotary valve core 11, ensuring that they do not affect or interfere with the arrangement and operation of the rotary valve core 11.

[0081] like Figure 2 As shown, the rotary 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 rotary 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.

[0082] like Figure 2 As shown, the cylinder includes a cover 111, a peripheral wall 112 connected to the cover 111, and a rotor 15 fixedly connected to the cover 111. The cover 111 separates the inner side of the valve body 10 from the stator coil 16. 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 stator coil 16, providing a certain degree of protection and preventing water flow from damaging the stator coil 16, but also provides an installation and fixing position for the rotor 15. The sealing ring 115 between the cover 111 and the cavity wall of the valve body 10 effectively prevents water leakage, 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.

[0083] like Figure 2 As shown, the stator coil 16 is connected to the valve body 10 using screws. Using screws to connect the stator coil 16 and the valve body 10 is a simple and reliable connection method, facilitating installation and disassembly. During production and maintenance, the stator coil 16 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 stator coil 16 and the valve body 10, thus ensuring the normal operation of the system.

[0084] Furthermore, the rotor 15 and the cover 111 are connected using an in-mold injection molding process. This connection method ensures a tight bond between the rotor 15 and the cover 111, improving connection strength and stability. The in-mold injection molding process integrates the rotor 15 and the cover 111 during molding, avoiding malfunctions and safety hazards caused by loose connections. It also improves production efficiency and product quality, ensuring that the water servo structure 1 maintains good performance and reliability during long-term use.

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. A rotary valve core is disposed in the valve cavity. The rotary 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 rotary valve core can rotate to cause the first inner hole and the second inner hole to rotate relative to the first outer hole and the second outer hole, thereby changing 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 rotary valve core can change sequentially between a first state, a second state, and a third state by rotation; 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 water servo structure also includes a stator coil and a corresponding rotor. The rotor is connected to the rotary valve core, and the stator coil and the rotor can drive the rotary valve core to rotate. And / or, 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 stator coil and the rotor drive the rotary valve core to rotate and change from the first state to the second state and the third state in sequence.

5. The water servo structure for a gas water heater as described in claim 4, characterized in that, The water flow sensor and the temperature sensor are located in the valve body near the water inlet.

6. The water servo structure for a gas water heater as described in claim 4, characterized in that, The rotary valve core includes a cylindrical body, which is coaxially arranged with the valve body and nested within the valve body. 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 body that contacts the cylindrical body has a first outer hole and a second outer hole.

7. The water servo structure for a gas water heater as described in claim 6, characterized in that, The cylinder includes a cover, the peripheral wall is connected to the cover, the rotor is fixedly connected to the cover, and the cover separates the inner side of the valve body and the stator coil; A sealing ring is provided between the circumferential part of the cover and the cavity wall of the valve body.

8. The water servo structure for a gas water heater as described in claim 7, characterized in that, The stator coil is connected to the valve body using screws.

9. The water servo structure for a gas water heater as described in claim 7, characterized in that, The rotor and the cover are connected by in-mold injection molding.

10. A gas 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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