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 for the gas water heater, the water servo structure is arranged in the gas water heater, the water servo structure comprises a valve cavity, the valve cavity 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, and the second water outlet is communicated with a water outlet pipe of the gas water heater. The valve cavity comprises a first cavity and a second cavity which are separated by the one-way throttle valve and arranged in the axial direction of the one-way throttle valve, the water inlet is formed in the first cavity, and the first water outlet and the second water outlet are formed in the second cavity; the water servo structure further comprises an expansion cavity, the expansion cavity communicates with the first cavity and the second cavity, a proportional valve is arranged in the expansion cavity and arranged at the position of a second communication opening where the expansion cavity communicates with the second cavity, the proportional valve comprises a first sealing plug, and the first sealing plug can be close to or away from the second communication opening. And the flow of the second communication port is adjusted or the second communication port is closed. The water servo structure is more reasonable in design, and the complexity is simplified.

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 a valve chamber, the valve chamber including a water inlet, a first water outlet, and a second water outlet, the first water outlet being connected to the water inlet pipe of the gas water heater, and the second water outlet being connected to a bypass pipe of the gas water heater:

[0008] The valve chamber includes a first chamber and a second chamber arranged axially and separated by a one-way throttle valve. The inlet is disposed in the first chamber, and the first outlet and the second outlet are disposed in the second chamber.

[0009] The water servo structure further includes an expansion cavity, which is connected to the first cavity and the second cavity respectively. The expansion cavity has a proportional valve, which is located at the second connection port where the expansion cavity and the second cavity are connected. The proportional valve includes a first sealing plug, which can be close to or away from the second connection port and adjust the flow rate of the second connection port or close the second connection port.

[0010] In this solution, the aforementioned structure is adopted. This water servo structure, through a special valve chamber design, utilizes a one-way throttle valve to divide the valve chamber into a first chamber and a second chamber, allowing the inlet and outlet to be distributed within different chambers. The one-way throttle valve itself has a certain flow resistance, which can limit the flow. Combined with the expansion chamber, it ensures the normal flow rate and effectively controls the direction and flow of water. The proportional valve in the expansion chamber can adjust the flow rate of the second connection port or close it as needed, achieving precise control of the water flow. This design allows the water servo structure to flexibly adjust the inlet and bypass flow rates under different operating conditions, meeting the stable operation of the gas water heater under different water usage demands, improving the control accuracy of the outlet water temperature, and enhancing the user experience. The water servo structure design is more rational, simplifying the complexity of existing water servo structures. It reduces the number of parts and assembly difficulty, lowers manufacturing costs and failure rates, and improves the reliability and stability of the system.

[0011] Preferably, the second outlet further includes a second sealing plug, which can adjust the flow rate of the second outlet or close the second outlet.

[0012] In this design, the aforementioned structure and the second sealing plug design of the second outlet enhance the control of the bypass flow. By adjusting the position of the second sealing plug, the flow rate of the second outlet can be further precisely controlled or the outlet can be completely closed, thereby allowing for more precise adjustment of the bypass flow rate. This enables the water heater to better adapt to different water usage scenarios, ensuring the stability and comfort of the outlet water temperature, and enhancing the control flexibility and reliability of the water servo structure.

[0013] Preferably, the second outlet and the second communication port are coaxially arranged. The proportional valve includes a valve stem and a first sealing plug disposed on the valve stem. The second sealing plug is disposed at the end of the valve stem. The valve stem moves to synchronously adjust the flow rate of the second communication port and the second outlet or to close the second communication port and the second outlet.

[0014] In this solution, the aforementioned structure is adopted. This design achieves synchronous adjustment of the second connecting port and the second outlet through the linkage of the valve stem, the first sealing plug, and the second sealing plug. This synchronous adjustment method not only improves the control accuracy and stability of the water servo structure but also simplifies the structural design, reduces the number of parts, and decreases assembly difficulty. Compared to existing technologies that require the individual adjustment of multiple components, this design achieves simultaneous control of two key parts with a single valve stem, reducing manufacturing costs and failure rates, improving system reliability and stability, and facilitating more precise outlet water temperature control.

[0015] Preferably, the valve stem can be moved to cause the water servo structure to change sequentially between the first state, the second state, and the third state;

[0016] In the first state, the water in the valve chamber flows from the first chamber through the expansion chamber into the second chamber and flows out from the first outlet and the second outlet;

[0017] In the second state, the valve stem drives the first sealing plug closer to the second connecting port and the second sealing plug closer to the second outlet, reducing the flow rate of the second connecting port and the second outlet;

[0018] In the third state, the first sealing plug closes the second communication port, the second sealing plug closes the second water outlet, and the first chamber is connected to the second chamber through the one-way throttle valve.

[0019] This solution employs the aforementioned structure, featuring a three-state design for the water servo mechanism. This allows for flexible switching based on actual needs, enhancing the adaptability and flexibility of the water heater. In the first state, water flow is normally distributed to meet regular water usage requirements. In the second state, the valve stem moves the sealing plug closer to the connection port and outlet, reducing the flow rate. This allows for initial flow regulation when the outlet water temperature is low, reducing 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 connection port and outlet are completely sealed, ensuring all incoming water flows through the heat exchanger for heating, effectively increasing the outlet water temperature. This multi-state design reduces the use of complex structures, achieving multiple functions through simple component movements. This lowers assembly difficulty and manufacturing costs while improving the system's intelligence and control precision. It better addresses different water usage scenarios and temperature requirements, enhancing user satisfaction.

[0020] Preferably, the water servo structure further includes a water flow sensor and a temperature sensor disposed within the valve chamber;

[0021] When the water flow sensor detects that the water flow rate in the valve chamber is greater than the preset flow rate, and the temperature sensor detects that the water temperature in the valve chamber is lower than the preset temperature, the valve stem moves and changes sequentially from the first state to the second state and the third state.

[0022] In this design, the aforementioned structure, along with the inclusion 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 valve stem moves promptly and switches its operating state, 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.

[0023] Preferably, the water flow sensor and the temperature sensor are disposed inside the valve chamber near the water inlet.

[0024] In this design, the aforementioned structure places the water flow sensor and temperature sensor within the valve chamber 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 rotary valve stem, 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.

[0025] Preferably, the valve chamber has an opening in its radial direction, the proportional valve closes the opening, and the proportional valve and the opening define the expansion chamber.

[0026] In this solution, the above structure is adopted. The opening in the valve cavity along the radial direction cooperates with the proportional valve to form an expansion cavity. This allows the expansion cavity to easily bypass the one-way throttle valve and connect the first cavity and the second cavity. The expansion cavity formed by the additional proportional valve also simplifies the structure and reduces manufacturing costs and assembly difficulty.

[0027] Preferably, the proportional valve includes a valve seat, a coil assembly, a valve stem passing through the valve seat, the coil assembly for driving the valve stem, the valve seat being sealed to the opening, and a sealing ring being provided between the valve seat and the opening.

[0028] In this solution, the aforementioned structure, including the valve seat and coil assembly design of the proportional valve, enables the valve stem to move precisely via the coil assembly, improving the control accuracy and stability of the proportional valve. The sealing ring between the valve seat and the opening further ensures sealing performance, preventing leakage. Compared to the complex drive devices and sealing structures in existing technologies, this structural design is simpler and more efficient, reducing the number of parts and assembly difficulty, lowering manufacturing costs and failure rates. It allows the water servo structure to more accurately regulate flow, meeting the precise control requirements under different water usage needs, and improving the performance and reliability of the entire water heater system.

[0029] Preferably, the first sealing plug and / or the second sealing plug are funnel-shaped, and the end of the sealing plug is provided with a diaphragm.

[0030] In this design, the aforementioned structure is used, with the first and / or second sealing plugs shaped like trumpets and a diaphragm at the end. This design better adapts to changes in water flow, improving sealing performance. The trumpet-shaped sealing plug maintains its position more stably under water flow impact, while the diaphragm further enhances the sealing effect, preventing water leakage. Compared to the complex sealing structures in existing technologies, this design achieves excellent sealing performance through a simple combination of a trumpet-shaped sealing plug and a diaphragm, simplifying the structure, reducing manufacturing costs and assembly difficulty, improving the control accuracy and reliability of the water servo structure, ensuring accurate flow adjustment under different operating conditions, and achieving effective control of the outlet water temperature.

[0031] A gas water heater includes a water servo structure for a gas water heater as described above.

[0032] 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.

[0033] 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. This water servo structure, through a special design of the valve chamber, uses a one-way throttle valve to divide the valve chamber into a first chamber and a second chamber, allowing the inlet and outlet to be distributed in different chambers. The one-way throttle valve itself has a certain flow resistance, which can limit the flow. Combined with the expansion chamber, it ensures the flow rate under normal conditions, effectively controlling the direction and flow rate of the water. The proportional valve in the expansion chamber can adjust the flow rate of the second connecting port or close the port as needed, achieving precise control of the water flow. This design allows the water servo structure to flexibly adjust the inlet flow rate and bypass flow rate under different operating conditions, meeting the stable operation of the gas water heater under different water demand, improving the control accuracy of the outlet water temperature, and enhancing the user experience. The water servo structure design is more reasonable, simplifying the complexity of existing water servo structures. It reduces the number of parts and assembly difficulty, lowers manufacturing costs and failure rates, and improves the reliability and stability of the system. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of a gas water heater according to Embodiment 1 of this utility model.

[0035] Figure 2 This is a schematic diagram of the water servo structure in the first state according to Embodiment 1 of this utility model.

[0036] Figure 3 This is a schematic diagram of the water servo structure in the second state of Embodiment 1 of this utility model.

[0037] Figure 4 This is a schematic diagram of the water servo structure in the third state of Embodiment 1 of this utility model.

[0038] Figure 5 This is a schematic diagram of the water servo structure in Embodiment 2 of this utility model.

[0039] Explanation of reference numerals in the attached figures:

[0040] Gas water heater 200

[0041] Water inlet pipe 201

[0042] Bypass pipe 202

[0043] Water Servo Structure 1

[0044] Valve chamber 100

[0045] Valve chamber 10

[0046] First cavity 101

[0047] Second chamber 102

[0048] Expansion cavity 103

[0049] Second Exit 104

[0050] Proportional valve 11

[0051] Valve stem 111

[0052] First sealing plug 112

[0053] Second sealing plug 113

[0054] Coil assembly 114

[0055] Skin 115

[0056] Sealing gasket 116

[0057] Inlet 12

[0058] First outlet 13

[0059] Second outlet 14

[0060] One-way throttle valve 15

[0061] Opening 16

[0062] 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] Example 1

[0065] like Figure 1 As shown, this embodiment provides a gas water heater 200, which employs an optimized water servo structure 1, effectively solving the problems of existing water heaters in hot water temperature control and flow regulation. Through the precise control of the water servo structure 1, the water heater can flexibly adjust the inlet and bypass flow rates according to actual water usage needs, ensuring the stability and comfort of the outlet water temperature and improving the user experience. Simultaneously, the simplified design of the water servo structure 1 reduces manufacturing costs and failure rates, improves system reliability and stability, enhances the market competitiveness of the gas water heater 200, and provides users with a higher quality, more efficient, and more comfortable hot water solution.

[0066] like Figures 1 to 4As shown, this embodiment provides a water servo structure 1 for a gas water heater 200. The water servo structure 1 is disposed within the gas water heater 200. The water servo structure 1 includes a valve chamber 10, which 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. The valve chamber 10 includes a first chamber 101 and a second chamber 102, which are separated by a one-way throttle valve 15 and arranged axially therein. The inlet 12 is disposed in the first chamber 101, and the first outlet 13 and the second outlet 14 are disposed in the second chamber 102. The water servo structure 1 also includes an expansion cavity 103, which is connected to the first cavity 101 and the second cavity 102 respectively. The expansion cavity 103 has a proportional valve 11, which is located at the second connection port 104 connecting the expansion cavity 103 and the second cavity 102. The proportional valve 11 includes a first sealing plug 112, which can move closer to or further away from the second connection port 104 and adjust the flow rate of the second connection port 104 or close the second connection port 104.

[0067] In this embodiment, the water servo structure 1, through a special design of the valve chamber 10, utilizes a one-way throttle valve 15 to divide the valve chamber 10 into a first chamber 101 and a second chamber 102, allowing the inlet 12 and outlet to be distributed in different chambers. The one-way throttle valve 15 itself has a certain flow resistance, which can limit the flow. Combined with the expansion chamber 103, it ensures the flow rate under normal conditions, effectively controlling the direction and flow rate of the water. Under normal conditions, the expansion chamber 103 has no flow resistance restriction, and the water flows out from the expansion chamber 103 without affecting the water output of the gas water heater 200. The proportional valve 11 within the expansion chamber 103 can adjust the flow rate of the second connecting port 104 or close the port as needed, achieving precise control of the water flow. This design allows the water servo structure 1 to flexibly adjust the inlet flow rate and bypass flow rate under different operating conditions, meeting the stable operation of the gas water heater 200 under different water usage demands, improving the control accuracy of the outlet water temperature, and enhancing the user experience. The water servo structure 1 is more rationally designed, simplifying the complexity of existing water servo structures. This reduces the number of parts and assembly difficulty, lowers manufacturing costs and failure rates, and improves the reliability and stability of the system.

[0068] like Figure 2As shown, the second outlet 14 also includes a second sealing plug 113, which can adjust the flow rate of the second outlet 14 or close the second outlet 14. The design of the second sealing plug 113 of the second outlet 14 increases the means of controlling the bypass flow. By adjusting the position of the second sealing plug 113, the flow rate of the second outlet 14 can be further precisely controlled or the outlet can be completely closed, thereby more finely adjusting the bypass flow rate, enabling the water heater to better adapt to different water use scenarios, ensuring the stability and comfort of the outlet water temperature, and enhancing the control flexibility and reliability of the water servo structure 1.

[0069] like Figure 2 As shown, the second outlet 14 and the second connecting port 104 are coaxially arranged. The proportional valve 11 includes a valve stem 111 and a first sealing plug 112 disposed on the valve stem 111. A second sealing plug 113 is disposed at the end of the valve stem 111. The valve stem 111 moves to synchronously adjust the flow rate of the second connecting port 104 and the second outlet 14 or to close the second connecting port 104 and the second outlet 14. This design achieves synchronous adjustment of the second connecting port 104 and the second outlet 14 through the linkage structure of the valve stem 111, the first sealing plug 112, and the second sealing plug 113. This synchronous adjustment method not only improves the control accuracy and stability of the water servo structure 1, but also simplifies the structural design, reduces the number of parts, and reduces assembly difficulty. Compared with the prior art where multiple components need to be adjusted separately, this design can achieve simultaneous control of two key parts through a single valve stem 111, reducing manufacturing costs and failure rates, improving the reliability and stability of the system, and facilitating more precise control of the outlet water temperature.

[0070] Specifically, in this embodiment, the valve cavity 100 is cylindrical, with its inlet 12 and outlet located at opposite ends in the axial direction. The first cavity 101 and the second cavity 102 are respectively located at the beginning and end. An expansion cavity 103 is located on the side of the valve cavity 100, connecting the first cavity 101 and the second cavity 102 from the side. The expansion cavity 103 is connected to the second cavity 102 via a second connecting port 104. The second outlet 14 is located on the other side of the valve chamber 100. The proportional valve 11 is arranged radially along the valve chamber 100, and its valve stem 111 can extend to the corresponding position of the second outlet 14. The valve stem 111 is provided with a first sealing plug 112 and a second sealing plug 113. The first sealing plug 112 can be adjusted to adjust its distance from the second connecting port 104 to adjust the flow rate of water entering the second chamber 102 from the first chamber 101. The second sealing plug 113 can be adjusted to adjust its distance from the second outlet 14 to adjust the flow rate of water flowing out of the second outlet 14 to the bypass passage. The first sealing plug 112 and the second sealing plug 113 can also seal the second connecting port 104 and the second outlet 14.

[0071] In this embodiment, the valve stem 111 can move to cause the water servo structure 1 to change sequentially in the first state, the second state, and the third state.

[0072] Among them, the first state is as follows Figure 2 As shown. In the first state, water in valve chamber 10 flows from the first chamber 101 through the expansion chamber 103 into the second chamber 102 and out from the first outlet 13 and the second outlet 14. The water flow is normally distributed, meeting the normal water demand. Since there is no flow resistance in the expansion chamber 103, the water flow does not pass through the one-way throttle valve 15, but flows completely through the expansion chamber 103 and enters the water inlet pipe 201 and bypass pipe 202 of the water heater respectively. At this time, the proportional valve 11 is opened to the maximum, and the water flow is at its maximum.

[0073] Among them, the second state is as follows Figure 3 As shown. In the second state, valve stem 111 moves the first sealing plug 112 closer to the second connecting port 104 and the second sealing plug 113 closer to the second outlet 14, reducing the flow rate at the second connecting port 104 and the second outlet 14. When the water flow sensor 17 detects that the water flow rate is too high and the outlet water temperature is lower than the set temperature, it continuously adjusts the proportional valve 11 according to the water flow rate and the difference between the outlet water temperature and the set temperature. The proportional valve 11 will push valve stem 111 to reduce the flow rate flowing into the second chamber 102 and out of the second outlet 14. The second state, where flow detection drives the sealing plugs closer to the connecting port and the outlet via valve stem 111 to reduce the flow rate, allows for preliminary flow adjustment when the outlet water temperature is low, reducing the water flow into the water heater and bypass, resulting in a higher outlet water temperature from the water heater.

[0074] Among them, the third state is as follows Figure 4 As shown. In the third state, the first sealing plug 112 closes the second connecting port 104, the second sealing plug 113 closes the second water outlet 14, and the first chamber 101 is connected to the second chamber 102 through the one-way throttle valve 15. If the water temperature of the water heater is still low after adjustment, the gas water heater 200 enters the third state. At this time, the proportional valve 11 will continue to push the valve stem 111 until the connecting port and the water outlet are completely closed, so that all the inlet water flows through the heat exchanger for heating, effectively increasing the water temperature.

[0075] This multi-state design reduces the use of complex structures, achieves multiple functions through simple component movements, reduces assembly difficulty and manufacturing costs, and improves the system's intelligence and control precision. It can better cope with different water use scenarios and temperature requirements, thereby improving user satisfaction.

[0076] like Figure 2As shown, the water servo structure 1 also includes a water flow sensor 17 and a temperature sensor disposed within the valve chamber 100. When the water flow sensor 17 detects that the water flow rate within the valve chamber 100 is greater than a preset flow rate, and the temperature sensor detects that the water temperature within the valve chamber 100 is lower than a preset temperature, the valve stem moves and changes sequentially from a first state to a second state and then a third state. The placement of the water flow sensor 17 and the temperature sensor enables real-time monitoring of water flow rate and temperature, improving the system's intelligence and control accuracy. When excessive flow and excessively low temperature are detected, the valve stem can move promptly and switch operating states, thereby automatically adjusting the inlet and bypass flow rates. This automatic adjustment function reduces signal delay and errors, improves the real-time performance and accuracy of control, and facilitates better 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, improving system reliability and stability, and providing users with a more stable and comfortable hot water supply.

[0077] In this embodiment, the water flow sensor 17 and the temperature sensor are integrated together, making it smaller in size.

[0078] like Figure 2 As shown, the water flow sensor 17 and the temperature sensor are positioned within the valve chamber 100 near the inlet 12. Positioning these sensors within the valve chamber 100 near the inlet 12 allows for faster and more accurate detection of the water flow rate 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 12 separates them from the rotary valve stem, 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.

[0079] like Figures 2 to 4 As shown, the valve chamber 100 has an opening 16 in its radial direction. The proportional valve 11 closes the opening 16, and the proportional valve 11 and the opening 16 define the expansion chamber 103. The opening 16 in the radial direction of the valve chamber 100, in cooperation with the proportional valve 11, forms the expansion chamber 103. This allows the expansion chamber 103 to easily bypass the one-way throttle valve 15 and connect to the first chamber 101 and the second chamber 102. The expansion chamber 103 formed by the additional proportional valve 11 also simplifies the structure and reduces manufacturing costs and assembly difficulty.

[0080] like Figures 2 to 4As shown, the proportional valve 11 includes a valve seat, a coil assembly 114, and a valve stem 111 passing through the valve seat. The coil assembly 114 drives the valve stem 111 to move. The valve seat is sealed to an opening 16, and a sealing ring is provided between the valve seat and the opening 16. The design of the valve seat and coil assembly 114 in the proportional valve 11 allows the valve stem 111 to move precisely through the drive of the coil assembly 114, improving the control accuracy and stability of the proportional valve 11. The sealing ring between the valve seat and the opening 16 further ensures sealing performance and prevents leakage. Compared with the complex drive devices and sealing structures in existing technologies, this structural design is simpler and more efficient, reducing the number of parts and assembly difficulty, lowering manufacturing costs and failure rates. This allows the water servo structure 1 to more accurately adjust the flow rate, meeting the precise control requirements under different water demand conditions, and improving the performance and reliability of the entire water heater system.

[0081] like Figure 2 As shown, the first sealing plug 112 and the second sealing plug 113 are funnel-shaped, with a diaphragm 115 at the end of each plug. This funnel-shaped design, with the diaphragm 115 at the end, better adapts to changes in water flow and improves sealing performance. The funnel-shaped sealing plug maintains its position more stably under water flow impact, while the diaphragm 115 further enhances the sealing effect, preventing water leakage. Compared to the complex sealing structures in existing technologies, this design achieves excellent sealing performance through a simple combination of a funnel-shaped sealing plug and a diaphragm 115, simplifying the structure, reducing manufacturing costs and assembly difficulty, improving the control accuracy and reliability of the water servo structure 1, ensuring accurate flow adjustment under different operating conditions, and achieving effective control of the outlet water temperature.

[0082] Example 2

[0083] like Figure 5 As shown, the water servo structure 1 in this embodiment is largely the same as that in embodiment 1, except that the first sealing plug 112 and the second sealing plug 113 in this embodiment are sealing gaskets.

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 including a valve chamber, the valve chamber 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, characterized in that: The valve chamber includes a first chamber and a second chamber arranged axially and separated by a one-way throttle valve. The inlet is disposed in the first chamber, and the first outlet and the second outlet are disposed in the second chamber. The water servo structure further includes an expansion cavity, which is connected to the first cavity and the second cavity respectively. The expansion cavity has a proportional valve, which is located at the second connection port where the expansion cavity and the second cavity are connected. The proportional valve includes a first sealing plug, which can be close to or away from the second connection port and adjust the flow rate of the second connection port or close the second connection port.

2. The water servo structure for a gas water heater as described in claim 1, characterized in that, The second outlet also includes a second sealing plug, which can adjust the flow rate of the second outlet or close the second outlet.

3. The water servo structure for a gas water heater as described in claim 2, characterized in that, The second outlet and the second connecting port are coaxially arranged. The proportional valve includes a valve stem and a first sealing plug disposed on the valve stem. The second sealing plug is disposed at the end of the valve stem. The valve stem moves to synchronously adjust the flow rate of the second connecting port and the second outlet or to close the second connecting port and the second outlet.

4. The water servo structure for a gas water heater as described in claim 3, characterized in that, The valve stem can be moved to cause the water servo structure to change sequentially into a first state, a second state, and a third state. In the first state, the water in the valve chamber flows from the first chamber through the expansion chamber into the second chamber and flows out from the first outlet and the second outlet; In the second state, the valve stem drives the first sealing plug closer to the second connecting port and the second sealing plug closer to the second outlet, reducing the flow rate of the second connecting port and the second outlet; In the third state, the first sealing plug closes the second communication port, the second sealing plug closes the second water outlet, and the first chamber is connected to the second chamber through the one-way throttle valve.

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 chamber. When the water flow sensor detects that the water flow rate in the valve chamber is greater than the preset flow rate, and the temperature sensor detects that the water temperature in the valve chamber is lower than the preset temperature, the valve stem moves and changes sequentially from the first state to the second state and the third state.

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 inside the valve chamber near the water inlet.

7. The water servo structure for a gas water heater as described in claim 1, characterized in that, The valve chamber has an opening in its radial direction, the proportional valve closes the opening, and the proportional valve and the opening define the expansion chamber.

8. The water servo structure for a gas water heater as described in claim 7, characterized in that, The proportional valve includes a valve stem, a valve seat, and a coil assembly. The valve stem passes through the valve seat, and the coil assembly is used to drive the valve stem to move. The valve seat is sealed to the opening, and a sealing ring is provided between the valve seat and the opening.

9. The water servo structure for a gas water heater as described in claim 3, characterized in that, The first sealing plug and / or the second sealing plug are funnel-shaped, and a diaphragm is provided at the end of the sealing plug.

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.

Images