A servo valve body, double-section water quantity servo valve and gas water heater

Abstract

The utility model discloses a kind of servo valve body, double-section water quantity servo valve and gas water heater, belong to household appliance technical field.The servo valve body is opened with water inlet and water outlet, water inlet cavity is arranged in servo valve body, water inlet is communicated with water inlet cavity, water outlet and water inlet cavity between being equipped with one section water inlet hole and two section water inlet hole;Two section water inlet hole has open state and closed state, two section water inlet hole in open state, water outlet is communicated with water inlet cavity through one section water inlet hole and two section water inlet hole, two section water inlet hole in closed state, water outlet is communicated with water inlet cavity only through one section water inlet hole;One section water inlet hole is equipped with at least two, all one section water inlet hole is equidistantly and evenly arranged along circumferential direction, and the edge of one section water inlet hole is wavy curve.When two section water inlet hole is closed, high-pressure water flow in servo valve body is cut and differentiated by multiple one section water inlet holes, greatly reduce the water flow impact that component receives, avoid component damage.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to a servo valve body, a dual-stage water flow servo valve, and a gas water heater. Background Technology

[0002] Gas water heaters are common household appliances that heat cold water by burning gas. To meet people's demands for a better bathing experience, constant temperature control has become a primary requirement for gas water heater temperature control. To achieve precise control of the outlet water temperature and improve user experience, existing gas water heaters typically use water flow sensors, shape memory alloy water flow sensors, or water flow servo valves to regulate the water flow, thereby ensuring a stable inlet water flow and achieving a precise, constant water temperature.

[0003] The water flow sensor ensures stable flow by cutting the water flow through impeller rotation, but it does not have the function of reducing the inlet water flow. Excessive water flow can easily cause impact on the components and affect the service life.

[0004] Shape memory alloy water flow sensors typically employ an embedded titanium-nickel alloy wire wound into a helical spring structure. By sensing the inlet water temperature, they pre-adjust the inlet water flow rate to ensure the outlet water temperature is as close as possible to the preset temperature. However, during repeated temperature-controlled deformation (contraction / expansion), the movement of the martensitic phase transformation front of the nickel-titanium shape memory alloy wire spring can cause cumulative damage, leading to a decrease in the material's elastic modulus. After long-term use, the spring's contraction force decreases by ≥15%, and the water temperature adjustment response delay can reach more than 3 seconds. Furthermore, in winter when the inlet water temperature is low, the shape memory alloy relies on the water temperature to deform autonomously and cannot actively predict flow changes. Excessively reducing the inlet water flow rate results in a smaller outlet water flow rate, affecting the user experience.

[0005] The water flow servo valve uses a stepper motor to adjust the opening in multiple stages, working in conjunction with a gas proportional valve to achieve precise water temperature and flow stability, thus improving the user experience. However, the manufacturing process for this component is complex and costly, affecting the product's market competitiveness. Furthermore, existing water flow servo valves reduce the total flow area by blocking some of the water passages, thereby altering the water flow. However, reducing the flow area leads to increased water pressure. The water flow within the servo valve directly impacts the valve body's components, subjecting them to significant pressure shocks that can easily damage them and negatively impact the user experience.

[0006] Therefore, there is an urgent need to design a servo valve body, a dual-stage water flow servo valve, and a gas water heater to solve the above-mentioned technical problems. Utility Model Content

[0007] The purpose of this utility model is to propose a servo valve body, a dual-stage water flow servo valve, and a gas water heater. The dual-stage water flow servo valve can reduce the impact of excessive water flow on the components, ensure stable water inlet flow, and adjust the water inlet flow according to usage needs, while also having a low cost.

[0008] To achieve this objective, the present invention adopts the following technical solution:

[0009] A servo valve body is provided, comprising an inlet and an outlet, and an inlet chamber inside the servo valve body. The inlet is connected to the inlet chamber. A first inlet hole and a second inlet hole are provided between the outlet and the inlet chamber. The second inlet hole has an open state and a closed state. When the second inlet hole is open, the outlet is connected to the inlet chamber through the first inlet hole and the second inlet hole. When the second inlet hole is closed, the outlet is connected to the inlet chamber only through the first inlet hole. There are at least two first inlet holes, and all the first inlet holes are evenly spaced along the circumference, with the edges of the first inlet holes being wavy curves.

[0010] As an optional technical solution for the aforementioned servo valve body, the servo valve body includes:

[0011] A water inlet pipe, wherein the water inlet pipe is provided with the water inlet, the water inlet pipe extends along a second direction, and,

[0012] The water outlet pipe has a water outlet at one end and extends along a first direction. The water inlet pipe and the water outlet pipe are connected at the intersection of the water inlet pipe and the water outlet pipe. The first direction is perpendicular to the second direction.

[0013] As an optional technical solution for the above-mentioned servo valve body, the water inlet chamber is provided with a blocking part, and a filter screen is provided on the inner side of the blocking part. The central axis of the blocking part and the central axis of the filter screen are both parallel to the first direction. The blocking part is provided with a first-section water inlet hole on the side wall opposite to the water outlet end of the water inlet pipe, and the blocking part is provided with a second-section water inlet hole on the side away from the water outlet along the first direction.

[0014] As an optional technical solution for the above-mentioned servo valve body, both the blocking part and the filter screen are frustoconical structures, and the filter screen is attached to the inner wall of the blocking part.

[0015] As an optional technical solution for the above-mentioned servo valve body, the water inlet pipe is provided with a first assembly groove at the upper part of the water inlet, and the water outlet pipe is provided with a second assembly groove with an O-ring at the water outlet. The first assembly groove and the second assembly groove form a mirror seal.

[0016] The first assembly slot has a positioning step on its upper side, and a clamping groove is provided at the part connected to the positioning step. A third assembly slot is provided on the upper side of the clamping groove for installing the water turbine assembly.

[0017] As an optional technical solution for the above-mentioned servo valve body, the water inlet pipe is provided with a first pin hole on both sides of the water inlet, the first pin hole being used to connect a first pin to connect other components; the water outlet pipe is provided with a second pin hole on both sides of the water outlet, the second pin hole being used to connect a second pin to connect other components.

[0018] As an optional technical solution for the aforementioned servo valve body, the servo valve body further includes:

[0019] Mounting base, which is fixedly connected to the other end of the water outlet pipe, is used to mount the solenoid valve push rod assembly.

[0020] As an optional technical solution for the aforementioned servo valve body, the inlet pipe, the outlet pipe, and the mounting base are integrally formed.

[0021] To achieve this objective, the present invention also adopts the following technical solution:

[0022] A dual-stage water flow servo valve includes a solenoid valve push rod assembly and the aforementioned servo valve body. The solenoid valve push rod assembly is connected to the servo valve body and is located at both ends of the servo valve body along a first direction, respectively, with the outlet. When the solenoid valve push rod assembly is energized, it can close the two-stage water inlet holes, so that the two-stage water inlet holes are in the closed state. When the solenoid valve push rod assembly is not energized, the two-stage water inlet holes are in the open state.

[0023] To achieve this objective, the present invention also adopts the following technical solution:

[0024] A gas water heater includes the aforementioned dual-stage water flow servo valve.

[0025] Compared with the prior art, the present invention has at least the following technical effects:

[0026] The servo valve body disclosed in this utility model has an inlet and an outlet. An inlet chamber is provided inside the servo valve body, and the inlet is connected to the inlet chamber. A first inlet hole and a second inlet hole are provided between the outlet and the inlet chamber. The second inlet hole has an open state and a closed state. When the second inlet hole is open, the outlet is connected to the inlet chamber through both the first and second inlet holes, allowing water to pass through both simultaneously, resulting in a larger water flow. When the second inlet hole is closed, the outlet is connected to the inlet chamber only through the first inlet hole, allowing water to pass through only the first inlet hole, resulting in a smaller water flow. At least two first inlet holes are provided, and all first inlet holes are evenly spaced along the circumference, with the edge of each first inlet hole being a wavy curve. The servo valve body of this structure can adjust the inlet water flow according to the usage requirements. Since there are multiple inlet holes in one stage, when the two inlet holes are closed, the water flow with excessive water pressure in the servo valve body is cut and dispersed by multiple inlet holes in one stage. Through the design of the dispersed hole positions, the impact of water flow on the components is greatly reduced, avoiding damage to the components, ensuring stable water output, and improving the user experience.

[0027] The dual-stage water flow servo valve disclosed in this utility model includes a solenoid valve push rod assembly and the aforementioned servo valve body. The solenoid valve push rod assembly is connected to the servo valve body and is located at both ends of the servo valve body along a first direction, with the outlet at the same location. When the water demand is low, the solenoid valve push rod assembly is energized to close both inlet holes, keeping them closed. At this time, only one inlet hole flows through, resulting in a small water flow. When the water demand is high, the solenoid valve push rod assembly is not energized, and both inlet holes are open, allowing water to flow through both simultaneously, resulting in a larger water flow. This dual-stage water flow servo valve uses a solenoid valve structure instead of a stepper motor to achieve two-stage control of water flow, ensuring stable water flow and post-adjustment of water flow. It can also adjust the inlet flow according to usage requirements and has a low cost.

[0028] The gas water heater disclosed in this utility model includes the aforementioned dual-stage water flow servo valve, which provides stable water flow, lower cost, and strong product competitiveness. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0030] Figure 1 This is an exploded view of the assembly of the dual-stage water flow servo valve provided in a specific embodiment of this utility model.

[0031] Figure 2 This is a schematic diagram of the structure of the servo valve body of the dual-stage water flow servo valve provided in a specific embodiment of this utility model. Figure 1 ;

[0032] Figure 3 This is a cross-sectional view of the servo valve body of the dual-stage water flow servo valve provided in a specific embodiment of this utility model.

[0033] Figure 4 This is a schematic diagram of the structure of the servo valve body of the dual-stage water flow servo valve provided in a specific embodiment of this utility model. Figure 2 ;

[0034] Figure 5 This is a schematic diagram of the structure of the servo valve body of the dual-stage water flow servo valve provided in a specific embodiment of this utility model. Figure 3 ;

[0035] Figure 6 This is a schematic diagram of the sealing ring structure of the dual-stage water flow servo valve provided in a specific embodiment of this utility model. Figure 1 ;

[0036] Figure 7 This is a schematic diagram of the sealing ring structure of the dual-stage water flow servo valve provided in a specific embodiment of this utility model. Figure 2 ;

[0037] Figure 8 This is a schematic diagram of the structure of the bracket for the dual-stage water flow servo valve provided in a specific embodiment of this utility model. Figure 1 ;

[0038] Figure 9 This is a schematic diagram of the structure of the bracket for the dual-stage water flow servo valve provided in a specific embodiment of this utility model. Figure 2 ;

[0039] Figure 10 This is an exploded view of the water turbine assembly of the dual-stage water flow servo valve provided in a specific embodiment of this utility model.

[0040] Figure 11 This is an exploded view of the assembly of the solenoid valve push rod assembly of the dual-stage water flow servo valve provided in a specific embodiment of this utility model.

[0041] Figure 12 This is a cross-sectional view of the dual-stage water flow servo valve provided in a specific embodiment of this utility model when the solenoid valve is energized.

[0042] Figure 13 This is a cross-sectional view of the dual-stage water flow servo valve provided in a specific embodiment of this utility model when the solenoid valve is not energized.

[0043] In the picture:

[0044] 100. Servo valve body; 101. Inlet; 102. Outlet; 103. First-stage inlet; 104. Second-stage inlet; 105. Temperature probe hole;

[0045] 1. Inlet pipe; 1a. Outlet end; 2. Outlet pipe; 3. Mounting base; 4. Blocking part; 5. Filter screen; 110. Hall element holder; 120. Hall element; 130. Epoxy potting compound; 140. First pin hole; 150. First pin; 160. First assembly groove; 170. Positioning step; 180. Clamp groove; 190. Clamp; 1910. Third assembly groove; 210. Temperature sensor holder; 220. Temperature sensor; 230. O-ring; 240. Pressure plate; 250. Second pin hole; 260. Second pin; 270. Temperature probe hole; 280. Second assembly groove; 410. First partition plate; 420. Second partition plate; 430. Third partition plate; 440. Sealing valve surface; 450. Rotating step;

[0046] 200. Solenoid valve push rod assembly; 15. Solenoid valve; 16. Second sleeve; 17. Magnetic rod; 18. Bearing; 19. Spring; 20. Pressing plate; 21. Top cap; 22. Rotary cap;

[0047] 300. Water turbine assembly; 6. First sleeve; 7. Flow divider blades; 8. Friction reducing components; 9. Magnetic rotor; 10. Flow stabilizer plate; 11. Protrusion; 12. Rotary groove;

[0048] 400. Valve structure; 13. Sealing ring; 14. Bracket; 131. First annular facet; 132. First plane; 133. Second annular facet; 134. Spherical sealing surface; 135. Third annular facet; 136. Second plane; 137. Central positioning hole; 138. Side positioning hole; 139. Locking groove; 1310. Diaphragm cavity; 141. Central positioning post; 142. Anti-detachment protrusion; 143. Side positioning post; 144. First groove; 145. First gathering groove; 146. First guide hole; 147. Second groove; 148. Second gathering groove; 149. Second guide hole. Detailed Implementation

[0049] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0050] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0052] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0053] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0054] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0055] This embodiment discloses a dual-stage water flow servo valve. The dual-stage water flow servo valve uses a solenoid valve structure instead of the stepper motor in the prior art, and uses two-stage control of water flow to ensure stable water flow and post-position adjustment of water flow.

[0056] like Figures 1 to 3 As shown, the dual-stage water flow servo valve in this embodiment includes a servo valve body 100 and a solenoid valve push rod assembly 200. The servo valve body 100 has an inlet 101 and an outlet 102. An inlet chamber is provided inside the servo valve body 100, and the inlet 101 is connected to the inlet chamber. A first-stage inlet hole 103 and a second-stage inlet hole 104 are provided between the outlet 102 and the inlet chamber. The solenoid valve push rod assembly 200 is connected to the servo valve body 100, and the solenoid valve push rod... The rod assembly 200 and the outlet 102 are located at the two ends of the servo valve body 100 along the first direction ab, respectively. When the solenoid valve push rod assembly 200 is energized, it can close the two-stage water inlet hole 104 so that the outlet 102 is connected to the water inlet chamber only through the first-stage water inlet hole 103. When the solenoid valve push rod assembly 200 is not energized, the two-stage water inlet hole 104 can be opened so that the outlet 102 is connected to the water inlet chamber through the first-stage water inlet hole 103 and the two-stage water inlet hole 104, respectively.

[0057] When the solenoid valve push rod assembly 200 is energized, it generates electromagnetic force to control the flow of fluid. When current passes through the electromagnetic coil, a magnetic field is generated, driving the solenoid valve push rod assembly 200 to move, thereby closing the secondary inlet port 104. At this time, water can only enter from the primary inlet port 103, thus reducing the water flow rate and controlling the inlet flow rate within the range of 6.5L to 9.0L / min. When the solenoid valve push rod assembly 200 is not energized, the secondary inlet port 104 is in the open state. At this time, water enters from both the primary inlet port 103 and the secondary inlet port 104 simultaneously. Under a water pressure of 0.1 to 0.5MPa, the water flow rate can reach 9.6 to 14.5L / min.

[0058] Specifically, the servo valve body 100 is generally shaped like a "7", including an inlet pipe 1, an outlet pipe 2, and a mounting base 3. The outlet pipe 2 extends along a first direction ab, and the inlet pipe 1 extends along a second direction cd. The inlet pipe 1 has an inlet 101, specifically, the lower end of the inlet pipe 1 has an inlet 101. One end of the outlet pipe 2 has an outlet 102, and the other end is fixedly connected to the mounting base 3. The solenoid valve push rod assembly 200 is connected to the mounting base 3. An inlet chamber is provided at the junction of the inlet pipe 1 and the outlet pipe 2, with the first direction ab perpendicular to the second direction cd. The side wall of the inlet pipe 1 has a Hall element seat 110 with a groove for mounting a Hall element 120 to accurately detect the magnetic signal of the water flow. The Hall element 120 is installed in the groove of the Hall element seat 110. After installation, it is sealed with epoxy potting compound 130. Figure 1 , Figure 2 and Figure 4 As shown, a temperature sensor holder 210 is provided on the side wall of the water outlet pipe 2. The temperature sensor holder 210 is located above the Hall element holder 110 and is used to fix the temperature sensor 220 to monitor the temperature of the water flow. To achieve a seal between the temperature sensor 220 and the temperature sensor holder 210, an O-ring 230 is provided in the temperature sensor holder 210 and fixed by a pressure plate 240.

[0059] Optionally, the inlet pipe 1, the outlet pipe 2, and the mounting base 3 are integrally molded, which is simple to process and low in cost.

[0060] Optionally, the outlet 102 and the Hall element holder 110 are not located on the same side to facilitate the core-pulling process during production.

[0061] Optionally, such as Figure 1 and Figure 2 As shown, the water inlet pipe 1 has first pin holes 140 on both sides of the water inlet 101. The first pin holes 140 are used to connect with the first pin 150 to connect other components. The water outlet pipe 2 has second pin holes 250 on both sides of the water outlet 102. The second pin holes 250 are used to connect with the second pin 260 to connect other components. Optionally, the first pin holes 140 and the second pin holes 250 can be either circular or square holes, depending on the actual situation. The cross-sectional shape of the first pin 150 and the second pin 260 should match the shape of the corresponding pin holes.

[0062] Based on temperature requirements, the dual-stage water flow servo valve can automatically adjust the output water flow rate at outlet 102. The aforementioned components of the dual-stage water flow servo valve work together to ensure accurate detection of parameters such as water flow rate and temperature. The signal processing circuit then converts the detection results into a usable signal output for precise temperature control. Optionally, an installation indicator arrow is provided on the outer wall of the servo valve body 100 to prevent incorrect installation.

[0063] Optionally, such as Figure 1 , Figures 3 to 5 As shown, a blocking part 4 is provided in the water inlet chamber, and a filter screen 5 is provided on the inner side of the blocking part 4. The central axis of the blocking part 4 and the central axis of the filter screen 5 are both parallel to the first direction ab. A section of water inlet hole 103 is provided on the side wall of the blocking part 4 facing the water outlet 1a of the water inlet pipe 1. Two sections of water inlet hole 104 are provided on the side of the blocking part 4 near the solenoid valve push rod assembly 200.

[0064] Optionally, both the blocking part 4 and the filter screen 5 are frustoconical structures, and the filter screen 5 is attached to the inner wall of the blocking part 4. In this structure, the top of the blocking part 4 along the first direction ab is a two-stage water inlet hole 104, and its top surface is a valve sealing surface 440, that is, a plane for opening or closing the two-stage water inlet hole 104. A water inlet hole 103 is opened on the side wall of the blocking part 4 along the second direction cd near the water inlet 101.

[0065] Optionally, such as Figure 4 As shown, each section of water inlet 103 has at least two inlets, and all section water inlets 103 are evenly spaced along the circumference, with the edges of each section water inlet 103 having a wavy curve. This dispersed inlet design avoids excessive water flow from impacting the components and allows the water flow rate to be controlled within the range of 6.5L to 9.0L / min. In this embodiment, four section water inlets 103 are provided. The wavy curve design achieves a smooth, circular transition edge, further reducing water flow impact and ensuring stable water output.

[0066] Optionally, one section of the water inlet hole 103 is shaped like a petal or leaf.

[0067] Optionally, such as Figure 5 As shown, at least two partition plates are provided between the blocking part 4 and the inner wall of the servo valve body 100 to divide the water inlet chamber into at least two chambers, namely the first chamber and the second chamber. The volume of the first chamber is smaller than the volume of the second chamber. The water outlet 1a of the water inlet pipe 1 is located in the first chamber. The edge of the water outlet 1a extends beyond the end face of the partition plate along the first direction ab, so that water can flow into the first chamber and the second chamber.

[0068] Optionally, the outlet end 1a of the water inlet pipe 1 is located at the center of the first chamber to ensure the uniformity of water output.

[0069] Optionally, the side wall of the servo valve body 100 is provided with a temperature probe hole 270 for inserting a temperature sensor 220. The temperature probe hole 270 is the inner opening of the temperature sensor seat 210, and the temperature probe hole 270 is located in the second chamber. The second chamber has a large volume and a large water capacity, which is beneficial for the temperature probe to detect the average water temperature and ensure detection accuracy.

[0070] In this embodiment, three partitions are provided: a first partition 410, a second partition 420, and a third partition 430. The first partition 410 and the second partition 420 form a first chamber, the second partition 420 and the third partition 430 form a second chamber, and the third partition 430 and the first partition 410 form a third chamber. Optionally, the first partition 410 and the second partition 420 form a 120° angle, the second partition 420 and the third partition 430 form a 150° angle, and the third partition 430 and the first partition 410 form a 90° angle. It is understood that the angles between any two partitions can be adjusted as needed, as long as the angle between the second partition 420 and the third partition 430 is greater than the angle between the first partition 410 and the second partition 420. The first partition plate 410, the second partition plate 420 and the third partition plate 430 have the same size along the first direction ab, and are all lower than the edge of the water outlet 1a, so that water can flow from the water outlet 1a of the water inlet pipe 1 into the three chambers.

[0071] In this embodiment, such as Figure 1 , Figures 6 to 9 As shown, the dual-stage water flow servo valve also includes a sealing valve structure 400, which is disposed between the servo valve body 100 and the solenoid valve push rod assembly 200. The sealing valve structure 400 includes a sealing ring 13 and a bracket 14. A spherical sealing surface 134 is formed on the sealing ring 13, and a central positioning hole 137 is provided at the center of the sealing ring 13. The bracket 14 is sealed and fitted with the spherical sealing surface 134. A central positioning post 141 is provided at the center of the bracket 14, and the central positioning post 141 is inserted and fitted with the central positioning hole 137. At least two anti-detachment protrusions 142 are provided at the end of the central positioning post 141 along its circumferential direction. The anti-detachment protrusions 142 are used to prevent the sealing ring 13 from falling off the bracket 14.

[0072] Optionally, the sealing ring 13 has an irregular structure, including a first annular surface 131, a first plane 132, a second annular surface 133, a spherical sealing surface 134, a third annular surface 135, and a second plane 136. The first annular surface 131, the first plane 132, and the second annular surface 133 form a locking groove 139 structure, facilitating engagement with the solenoid valve push rod assembly 200 and ensuring a tight seal. The connection surface between the second annular surface 133 and the third annular surface 135 is designed as a spherical sealing surface 134, which better forms a sealing fit with the bracket 14, ensuring a tight seal. The third annular surface 135 and the second plane 136 form a U-shaped diaphragm cavity 1310 structure, facilitating connection and assembly with the U-shaped frame on the bracket 14. The second plane 136 also has a central positioning hole 137 at its center, with side positioning holes on either side of the central hole, facilitating assembly with the central positioning post 141 on the bracket 14 and ensuring a stable and reliable connection. Optionally, both the central positioning hole 137 and the side positioning hole 138 are circular holes, and the diameter of the side positioning hole 138 is smaller than the diameter of the central positioning hole 137.

[0073] Optionally, the sealing ring 13 is made of EPDM material.

[0074] Furthermore, the end of the central positioning post 141 is umbrella-shaped, and its lower part is provided with a first groove 144, which facilitates assembly and fixation with the central positioning hole 137 of the sealing ring 13 to avoid misalignment.

[0075] Furthermore, the "umbrella"-shaped end of the central positioning post 141 is provided with three anti-detachment protrusions 142, which can increase the roughness, increase the connection stability between the sealing ring 13 and the bracket 14, and prevent the sealing ring 13 from falling off.

[0076] Furthermore, the inner side of the central positioning post 141 is provided with a first gathering groove 145 and a first guide hole 146 that are connected. The first gathering groove 145 is opened on one side of the "umbrella"-shaped end, and the first guide hole 146 is opened on the other side. The end of the other side is tapered. The tapered structure can better disperse the bottom pressure and increase its stability.

[0077] Optionally, a side positioning post 143 is provided on each side of the central positioning post 141, and the two side positioning posts 143 are respectively connected to the two side positioning holes 138 one-to-one. The lower part of the side positioning post 143 is provided with a second groove 147, which facilitates the assembly and fixation with the side positioning holes 138 of the sealing ring 13, further increasing the connection stability of the sealing ring 13 and the bracket 14 and avoiding misalignment.

[0078] Furthermore, the side positioning post 143 located below the central positioning post 141 is provided with a connected second gathering groove 148 and a second guide hole 149, which can increase its drainage flow rate. The first gathering groove 145 and the second gathering groove 148 are positioned opposite each other to form a water flow discharge backflow. The two ends of the second guide hole 149 are respectively connected to the diaphragm cavity 1310 and a section of water inlet 103, so that water flows from the diaphragm cavity 1310 into the section of water inlet 103.

[0079] Optionally, the size of the side positioning post 143 is smaller than the size of the center positioning post 141, and the size of the side positioning post 143 can be matched with the size of the side positioning hole 138.

[0080] Optionally, such as Figure 5 As shown, the inner and outer sides of the sealing valve surface 440 of the blocking part 4 are provided with rounded chamfers to ensure the sealing performance when assembled with the sealing ring 13. The sealing valve surface 440 is provided with a rotating step 450 on the lower side along the first direction ab, which facilitates rotational positioning with the central positioning post 141 on the bracket 14 and avoids misalignment and poor sealing problems.

[0081] In this embodiment, such as Figure 1 and Figure 10 As shown, the dual-stage water flow servo valve also includes a water turbine assembly 300, which is disposed inside the water inlet pipe 1. The water turbine assembly 300 includes a first sleeve 6, a flow divider blade 7, a friction reducing component 8, a magnetic rotor 9, and a flow stabilizing plate 10. The flow divider blade 7 is fixedly disposed inside the first sleeve 6 and located at one end near the water inlet 101. The magnetic rotor 9 is disposed inside the first sleeve 6 and located downstream of the flow divider blade 7. The flow stabilizing plate 10 is detachably connected to the other end of the first sleeve 6, i.e., the end away from the water inlet 101. The two ends of the magnetic rotor 9 are rotatably connected to the flow divider blade 7 and the flow stabilizing plate 10, respectively. A friction reducing component 8 is provided between the magnetic rotor 9 and the flow divider blade 7, and between the magnetic rotor 9 and the flow stabilizing plate 10, respectively, to reduce the friction and wear of the magnetic rotor 9 during rotation, thereby extending the service life of the magnetic rotor 9 and reducing production costs.

[0082] Optionally, the magnetic rotor 9 includes a rotating shaft and blades sleeved on the rotating shaft. The flow-dividing blades 7 have a central hole, and the flow-stabilizing plate 10 has a central groove. The two ends of the rotating shaft are rotatably connected to the central hole and the groove, respectively. A friction-reducing component 8 is provided between the rotating shaft and the bottom of the central hole, and another friction-reducing component 8 is provided between the rotating shaft and the bottom of the groove. By providing friction-reducing components 8 between the rotating shaft and the flow-dividing blades 7, and between the rotating shaft and the flow-stabilizing plate 10, friction and wear during shaft rotation can be effectively reduced, thereby extending the service life of the magnetic rotor 9. Further optionally, the friction-reducing component 8 is a sphere.

[0083] Optionally, the diverting blades 7 are designed with a curved shape, which helps to disperse the water flow and reduce water flow noise. The number of diverting blades 7 can be designed according to the actual situation; in this embodiment, there are five diverting blades 7.

[0084] Optionally, the diverter blade 7 and the first sleeve 6 are integrally molded using injection molding, so that the water entering the inlet pipe 1 is dispersed and the water flow is not abnormally large or small due to fluctuations in water volume or water pressure, thereby ensuring the stability of the water flow.

[0085] Optionally, the flow stabilizer 10 is used to disperse water flow and stabilize water pressure. The flow stabilizer 10 includes an end cap and flow stabilizers. The flow stabilizers are fixedly disposed on the side of the end cap facing the first sleeve 6. There are at least two flow stabilizers, and all flow stabilizers are evenly distributed along the circumference of the end cap. By setting the flow stabilizers, the water flow can be further dispersed, avoiding fluctuations in water volume or water pressure. The number of flow stabilizers can be selected according to the actual situation. In this embodiment, four flow stabilizers are provided.

[0086] Optionally, one of the first sleeve 6 and the flow stabilizer 10 is provided with a protrusion 11, and the other is provided with an L-shaped rotating groove 12, with the protrusion 11 and the rotating groove 12 being detachably connected. Specifically, when the first sleeve 6 and the flow stabilizer 10 are assembled, the first sleeve 6 and the flow stabilizer 10 are fastened by rotating the protrusion 11 into the L-shaped rotating groove 12. In this embodiment, the protrusion 11 is provided on the flow stabilizer 10, and the rotating groove 12 is provided on the first sleeve 6.

[0087] In this embodiment, such as Figure 3 As shown, the water inlet pipe 1 has a first assembly groove 160 at the upper part of the water inlet 101, and the water outlet pipe 2 has a second assembly groove 280 with an O-ring at the water outlet 102. The first assembly groove 160 and the second assembly groove 280 form a mirror seal.

[0088] Optionally, a positioning step 170 is provided on the upper side of the first assembly groove 160 for fixing and positioning the assembly components. A clamp groove 180 is provided at the part connected to the positioning step 170, and a third assembly groove 1910 is provided on the upper side of the clamp groove 180 for installing the water turbine assembly 300.

[0089] In this embodiment, such as Figure 11As shown, the solenoid valve push rod assembly 200 includes a solenoid valve 15, a second sleeve 16, a magnetic rod 17, a bearing 18, a spring 19, a pressure plate 20, and a top cap 21. The solenoid valve 15 is connected to the mounting base 3 via a flange. The second sleeve 16 is mounted on the solenoid valve 15. The magnetic rod 17 is installed inside the second sleeve 16. The bearing 18 is connected in parallel with the magnetic rod 17. The spring 19 is nested around the outer periphery of the bearing 18. The pressure plate 20 presses the spring 19 onto the bearing 18 and is then pressed and assembled onto the bearing 18 by the top cap 21. The second sleeve 16 is connected to the sealing valve structure 400. Specifically, the second sleeve 16 has a locking step, which engages with the locking groove 139 on the sealing ring 13 in the sealing valve structure 400, thereby achieving the connection between the air valve structure and the solenoid valve push rod assembly 200.

[0090] When the solenoid valve 15 is energized, it generates electromagnetic force to control the flow of fluid. When the current passes through the solenoid coil, a magnetic field is generated, which attracts the magnetic rod 17 and drives the bearing 18 to move, thereby opening or closing the sealing valve face 440. This controls the servo valve body 100 to switch back and forth between the first inlet 101 and the second inlet 101, thereby controlling the flow rate of the incoming water.

[0091] The assembly method of the dual-stage water flow servo valve in this embodiment will be described below.

[0092] A friction-reducing component 8 is installed in the center hole of the flow divider blade 7. The flow divider blade 7 and the first sleeve 6 are integrally molded and located at the lower part of the water inlet pipe 1. The magnetic rotor 9 is installed above the friction-reducing component 8. Another friction-reducing component 8 is embedded in the groove of the flow stabilizer plate 10. The protrusion 11 on the flow stabilizer plate 10 and the rotating groove 12 on the first sleeve 6 are assembled to form the water turbine assembly 300.

[0093] Furthermore, the servo valve body 100 is provided with a positioning step 170, and the assembled water wheel assembly 300 is embedded in the water inlet 101 of the servo valve body 100. It is pressed and fixed in the clamp groove 180 by the clamp 190 to ensure tightness and stability.

[0094] Furthermore, the frustum-shaped filter screen 5 is embedded inside the blocking part 4.

[0095] Furthermore, the second sleeve 16 is embedded in the central hole of the solenoid valve 15, and the nut 22 is connected to the second sleeve 16 to fix it on the solenoid valve 15.

[0096] Furthermore, the magnetic rod 17 is installed inside the second sleeve 16, the bearing 18 is connected in parallel with the magnetic rod 17, the spring 19 is nested on the bearing 18, and the pressing plate 20 is assembled on the bearing 18 by pressing the spring 19 and is pressed and connected to the bearing 18 by the top cap 21, forming the structure of the solenoid valve push rod assembly 200.

[0097] Furthermore, the sealing ring 13 and the bracket 14 are fixedly connected by the central positioning post 141 and the side positioning posts 143 on both sides to form the sealing valve structure 400, and are connected to the solenoid valve push rod assembly 200 through the locking groove 139.

[0098] Furthermore, the solenoid valve push rod assembly 200 and the servo valve body 100 are connected to the mounting base 3 via screw fastening flanges.

[0099] like Figure 12 As shown, the assembled dual-stage water flow servo valve generates electromagnetic force to control fluid flow after the solenoid valve 15 is energized. When current passes through the solenoid coil, a magnetic field is generated, attracting the magnetic rod 17 and driving the bearing 18 to move, thereby closing the sealing surface 440 of the second-stage inlet 104. At the same time, the water flow in the diaphragm chamber 1310 is discharged to the first-stage inlet 103 through the second guide hole 149 of the side positioning column 143. At this time, the water flow can only enter the outlet pipe 2 from the first-stage inlet 103, thereby achieving the effect of reducing the water flow rate and controlling the inlet flow rate in the range of 6.5L to 9.0L / min.

[0100] like Figure 13 As shown, when the solenoid valve 15 is not energized, the solenoid valve push rod assembly 200 does not move, and the sealing valve structure 400 opens the second-stage water inlet 104 under the push of the water flow. At this time, water enters the first-stage water inlet 103 and the second-stage water inlet 104 at the same time. Under a water pressure of 0.1 to 0.5 MPa, the water flow rate can reach 9.6 to 14.5 L / min.

[0101] This embodiment also provides a gas water heater including the aforementioned dual-stage water flow servo valve, thus possessing all the advantages of the aforementioned dual-stage water flow servo valve, which will not be repeated here. The derivation process of the beneficial effects of the gas water heater in this embodiment is largely similar to the derivation process of the beneficial effects of the aforementioned dual-stage water flow servo valve, and therefore will not be repeated here.

[0102] Obviously, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

[0103] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A servo valve body, characterized in that, The servo valve body (100) is provided with an inlet (101) and an outlet (102). An inlet chamber is provided inside the servo valve body (100). The inlet (101) is connected to the inlet chamber. A first inlet hole (103) and a second inlet hole (104) are provided between the outlet (102) and the inlet chamber. The second inlet hole (104) has an open state and a closed state. When the second inlet hole (104) is in the open state, the outlet (102)... 102) The water inlet is connected to the water inlet cavity through the first water inlet hole (103) and the second water inlet hole (104) respectively. When the second water inlet hole (104) is closed, the water outlet (102) is connected to the water inlet cavity only through the first water inlet hole (103). There are at least two first water inlets (103). All first water inlets (103) are evenly arranged at equal intervals along the circumferential direction, and the edge of the first water inlet hole (103) is a wavy curve.

2. The servo valve body according to claim 1, characterized in that, The servo valve body (100) includes: A water inlet pipe (1), wherein the water inlet pipe (1) is provided with the water inlet (101), the water inlet pipe (1) extends along a second direction, and, The water outlet pipe (2) has an outlet (102) at one end. The water outlet pipe (2) extends along a first direction. The water inlet chamber is provided at the intersection of the water inlet pipe (1) and the water outlet pipe (2). The first direction is perpendicular to the second direction.

3. The servo valve body according to claim 2, characterized in that, The water inlet cavity is provided with a blocking part (4), and a filter screen (5) is provided on the inner side of the blocking part (4). The central axis of the blocking part (4) and the central axis of the filter screen (5) are both parallel to the first direction. The blocking part (4) is provided with a first-section water inlet hole (103) on the side wall opposite to the water outlet (1a) of the water inlet pipe (1). The blocking part (4) is provided with a second-section water inlet hole (104) on the side away from the water outlet (102) along the first direction.

4. The servo valve body according to claim 3, characterized in that, Both the blocking part (4) and the filter screen (5) are frustum-shaped structures, and the filter screen (5) is attached to the inner wall of the blocking part (4).

5. The servo valve body according to claim 2, characterized in that, The water inlet pipe (1) has a first assembly groove (160) at the upper part of the water inlet (101), and the water outlet pipe (2) has a second assembly groove (280) with an O-ring at the water outlet (102). The first assembly groove (160) and the second assembly groove (280) form a mirror seal. The first assembly slot (160) has a positioning step (170) on its upper side, and a clamping groove (180) is provided at the part connected to the positioning step (170). The clamping groove (180) has a third assembly slot (1910) on its upper side for installing the water turbine assembly (300).

6. The servo valve body according to claim 2, characterized in that, The water inlet pipe (1) has a first pin hole (140) on both sides of the water inlet (101). The first pin hole (140) is used to connect the first pin (150) to connect other components. The water outlet pipe (2) has a second pin hole (250) on both sides of the water outlet (102). The second pin hole (250) is used to connect the second pin (260) to connect other components.

7. The servo valve body according to any one of claims 2-6, characterized in that, The servo valve body (100) also includes: Mounting base (3), which is fixedly connected to the other end of the water outlet pipe (2), is used to install the solenoid valve push rod assembly (200).

8. The servo valve body according to claim 7, characterized in that, The inlet pipe (1), the outlet pipe (2), and the mounting base (3) are integrally formed.

9. A dual-stage water flow servo valve, characterized in that, The device includes a solenoid valve push rod assembly (200) and a servo valve body (100) as described in any one of claims 1-8. The solenoid valve push rod assembly (200) is connected to the servo valve body (100) and is located at both ends of the servo valve body (100) along a first direction, respectively, with the outlet (102). When the solenoid valve push rod assembly (200) is energized, it can close the two-stage water inlet (104) so ​​that the two-stage water inlet (104) is in the closed state. When the solenoid valve push rod assembly (200) is not energized, the two-stage water inlet (104) is in the open state.

10. A gas water heater, characterized in that, Includes the dual-stage water flow servo valve as described in claim 9.

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