Outdoor frost-proof faucet

Abstract

This utility model discloses an outdoor antifreeze faucet, belonging to the technical field of outdoor faucet structure. The outdoor antifreeze faucet includes: a valve body assembly with an inlet and an outlet; a valve core assembly installed within the valve body assembly, the valve core assembly including a valve core shell, a valve core rod, a stationary plate, and a moving plate, wherein the stationary plate is fixed to the valve core shell, and the moving plate is connected to the valve core rod; the valve core rod is rotatably mounted, driving the moving plate to rotate relative to the stationary plate; the stationary plate has a first through hole and a first vent hole, and the moving plate has a second through hole corresponding to the first through hole and a second vent hole corresponding to the first vent hole; wherein the valve body assembly has a venting channel connected to the first vent hole and the second vent hole. This utility model, through its innovative three-position valve core design, venting and drainage system, and one-way valve structure, effectively solves the technical problems of traditional outdoor faucets being prone to freezing and cracking in winter and potentially causing siphon pollution during water outages.

Description

Technical Field

[0001] This utility model relates to the technical field of outdoor water tap structures. More specifically, this utility model relates to an outdoor antifreeze water tap. Background Technology

[0002] Traditional outdoor faucets generally have two technical defects: First, residual water in the valve body cannot be discharged after being turned off, and it will freeze and expand in low-temperature environments, causing the valve body to crack; second, in the event of a water outage, the connected shower head or hose may draw external sewage back into the water supply network due to the siphon effect, causing water pollution. Summary of the Invention

[0003] One object of this invention is to solve at least the problems described above and to provide at least the advantages that will be explained later.

[0004] Another objective of this utility model is to provide an outdoor antifreeze faucet, which effectively solves the technical problems of traditional outdoor faucets such as easy freezing and cracking in winter and potential siphon pollution when the water supply is interrupted through an innovative three-stage valve core design, a ventilation and drainage system, and a one-way valve structure.

[0005] To achieve these objectives and other advantages according to the present invention, an outdoor antifreeze faucet is provided, comprising: Valve body assembly, which has an inlet and an outlet; A valve core assembly is installed inside a valve body assembly. The valve core assembly includes a valve core housing, a valve core rod, a stationary plate, and a moving plate. The stationary plate is fixed to the valve core housing, and the moving plate is connected to the valve core rod. The valve core rod is rotatably arranged to drive the moving plate to rotate relative to the stationary plate. The stationary plate is provided with a first through hole and a first vent hole, and the moving plate is provided with a second through hole corresponding to the first through hole and a second vent hole corresponding to the first vent hole. The valve body assembly is provided with a ventilation channel, which is connected to the first ventilation hole and the second ventilation hole.

[0006] Preferably, the valve core housing is provided with a water supply positioning groove, a shut-off position positioning groove, and a venting positioning groove; The valve core assembly also includes a ball and a spring. When the ball engages with the corresponding positioning groove under the action of the spring, it forms a gear positioning. Specifically, when the ball is engaged with the water-passing positioning groove, the second through hole of the moving plate is completely aligned with the first through hole of the stationary plate, and the first vent hole of the stationary plate is completely offset from the second vent hole of the moving plate. The water inlet channel of the valve body assembly is connected through the aligned first and second through holes, while the air passage is blocked from communicating with the first and second vent holes. When the ball is engaged with the off position positioning groove, the second through hole of the moving plate is completely offset from the first through hole of the stationary plate, and the second vent hole of the moving plate is completely offset from the first vent hole of the stationary plate. Both the water inlet channel and the air passage of the valve body assembly are blocked. When the ball is engaged with the air-passing positioning groove, the second vent hole of the moving plate is completely aligned with the first vent hole of the stationary plate, and the second through hole of the moving plate is completely offset from the first through hole of the stationary plate. The air passage of the valve body assembly is connected to the internal cavity of the valve body assembly through the aligned first and second vent holes, while the water inlet channel is blocked.

[0007] Preferably, the valve core rod is connected to the moving plate via a valve core shaft; The valve core shaft has an axial vent hole inside; the axial vent hole is connected to the second vent hole of the moving plate.

[0008] Preferably, the valve core assembly further includes a first friction pad, a second friction pad, and a nut; the first friction pad is disposed between the handle and the valve core housing, and the second friction pad is disposed between the stationary plate and the valve body assembly; the nut is threadedly connected to the valve core rod and is used to press the internal components of the valve core assembly.

[0009] Preferably, the outdoor antifreeze faucet further includes: an anti-siphon check valve, which is disposed in the water inlet channel of the valve body assembly and located at the front end of the water inlet channel; the anti-siphon check valve includes a check valve housing, a piston, a sealing ring, and a spring; the check valve housing is connected to the valve body assembly; the piston is movably disposed within the check valve housing; the sealing ring is disposed on the piston; the spring is disposed within the check valve housing and provides a preload force to the piston to move it toward the closed position.

[0010] Preferably, the valve core assembly engages with a corresponding hexagonal structure at the bottom of the valve body assembly via a hexagonal structure at its bottom; this engagement is used to prevent the valve core assembly from rotating within the valve body assembly.

[0011] Preferably, the mounting section of the valve body assembly is configured as an extended structure that can be embedded in the wall; the axis of the valve body assembly is set at an angle to the mounting plane.

[0012] Preferably, the first through hole of the stationary plate is a fan-shaped through hole penetrating the stationary plate; the second through hole of the moving plate is a fan-shaped water outlet with a central angle of 120 degrees, and the center of the moving plate is provided with a circular through hole connected to the second vent hole.

[0013] Preferably, the one-way valve housing of the anti-siphon one-way valve is connected to the inlet connector of the valve body assembly.

[0014] Preferably, the bottom of the valve core rod is provided with a boss, which cooperates with the driving groove on the moving plate to drive the moving plate to rotate; the valve core rod is also provided with a positioning post, which cooperates with the arc-shaped limiting groove on the valve core shell to limit the rotation angle of the valve core rod.

[0015] This utility model has at least the following beneficial effects: 1. This utility model's outdoor antifreeze faucet connects to the first and second vent holes via a venting channel within the valve body assembly. This allows air to be introduced through the venting channel after the water supply is turned off, breaking the vacuum inside the valve and enabling rapid drainage of water stored within the valve body. This effectively prevents valve body cracking due to freezing in winter. The overall structure is highly integrated, requiring no external drainage device or electric heating equipment, making it energy-saving, environmentally friendly, and low-cost.

[0016] 2. This utility model's outdoor antifreeze faucet utilizes a combination of a ball bearing and a spring with three positioning grooves to achieve a clear three-level operation feel (water on, off, air on), allowing users to accurately switch modes and avoid accidental operation. A distinct "click" sound provides feedback when switching modes, enhancing the user experience and operational reliability.

[0017] 3. In this outdoor antifreeze faucet, the axial vent hole inside the valve core shaft forms a continuous ventilation path, ensuring that air can smoothly enter the valve body from the outside, thus improving drainage efficiency. The structure is compact, the ventilation path is concealed, and it does not affect the overall aesthetics or sealing performance.

[0018] 4. In this outdoor antifreeze faucet, the friction pad reduces wear on the handle during rotation, extending its service life. The nut tightening structure ensures a tight fit between all components inside the valve core, preventing leakage and improving sealing and operational stability.

[0019] 5. In this utility model of an outdoor antifreeze faucet, the anti-siphon check valve can automatically close when the water supply is interrupted, preventing external sewage from being drawn back into the water supply network and ensuring water quality safety. The spring preload design ensures that the check valve responds quickly and has high reliability.

[0020] 6. In this utility model of an outdoor antifreeze faucet, the hexagonal structure ensures the valve core assembly is securely installed, preventing it from rotating during operation, thus improving structural rigidity and operational accuracy. Installation is simple, positioning is accurate, and production and maintenance are convenient.

[0021] 7. The extended structure and inclined design of this outdoor antifreeze faucet facilitate wall installation, are aesthetically pleasing, and save space. The inclined angle helps residual water to drain quickly through the vent, enhancing the antifreeze effect.

[0022] 8. In this utility model of an outdoor antifreeze faucet, the fan-shaped through-hole design, combined with a 120-degree rotation angle, achieves precise water flow control and ventilation switching. The operating angle is reasonable and ergonomic. The fan-shaped structure facilitates uniform water flow distribution and reduces water hammer.

[0023] 9. In this utility model of an outdoor antifreeze faucet, the one-way valve is directly integrated into the water inlet connector, resulting in a compact structure, convenient installation, and no impact on the overall appearance. Located directly at the water inlet, it provides a more direct and reliable anti-siphon effect.

[0024] 10. In this utility model of outdoor antifreeze faucet, the screw connection is firm and reliable, preventing the handle from loosening or falling off. It is easy to assemble and disassemble, facilitating later maintenance or replacement of parts.

[0025] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0026] Figure 1 This is an axial cross-sectional view of an outdoor antifreeze faucet according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the stationary sheet in one embodiment of the present invention; Figure 3 This is a schematic diagram of the moving piece in one embodiment of the present invention; Figure 4 This is a schematic diagram of the static and dynamic plates in the water outlet state in one embodiment of this utility model; Figure 5 This is a cross-sectional view of the stationary and moving plates in the water outlet state in one embodiment of this utility model; Figure 6 This is a schematic diagram of the state of the stationary plate and the moving plate in the water-off state in one embodiment of this utility model; Figure 7 This is a cross-sectional view of the stationary and moving plates in the water-off state in one embodiment of this utility model; Figure 8 This is a schematic diagram of the valve core housing in one embodiment of the present invention; Figure 9 This is a partial structural schematic diagram of an outdoor antifreeze faucet in one embodiment of the present invention; Figure 10 This is an exploded view of a portion of the structure of an outdoor antifreeze faucet in one embodiment of this utility model; Figure 11 This is a cross-sectional view of an outdoor antifreeze faucet installed on a wall in one embodiment of this utility model; Reference numerals: 1. Anti-siphon check valve; 2. Valve body assembly; 3. Valve core assembly; 4. Handle; 5. Screw; 6. Sealing ring; 7. First friction pad; 8. Nut; 9. Valve core shaft; 10. Sealing ring one; 11. Sealing ring two; 12. Sealing ring three; 13. Ball bearing; 14. Spring; 15. Sealing ring four; 16. Moving plate; 160. Second through hole; 161. Second vent hole; 162. Round through hole; 17. Stationary plate; 170. First through hole; 171. First vent hole; 18. Water inlet connector; 19. Valve core rod; 190. Boss; 191. Positioning pin; 20. Valve core housing; 201. Water supply positioning groove; 202. Closed position positioning groove; 203. Vent positioning groove; 21. Second friction pad; 22. Sealing ring five; 23. Sealing ring six. Detailed Implementation

[0027] The present invention will now be described in further detail so that those skilled in the art can implement it based on the description.

[0028] It should be understood that terms such as "having," "comprising," and "including" used in the embodiments of this application do not exclude the presence or addition of one or more other elements or combinations thereof. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of components in a specific posture. If the specific posture changes, the directional indication will also change accordingly. When an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or may have an intervening element present. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element through an intervening element. Descriptions involving "first," "second," etc., in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0029] It should be noted that, unless otherwise specified, the experimental methods described in the following implementation plan are all conventional methods, and the reagents and materials described are all commercially available unless otherwise specified.

[0030] It should be noted that the technical solutions of the various embodiments of this application can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this application.

[0031] like Figure 1-11This utility model provides an outdoor antifreeze faucet, which includes: Valve body assembly 2 has an inlet and an outlet; The valve core assembly 3 is installed inside the valve body assembly 2. The valve core assembly 3 includes a valve core housing 20, a valve core rod 19, a stationary plate 17, and a moving plate 16. The stationary plate 17 is fixed to the valve core housing 20, and the moving plate 16 is connected to the valve core rod 19. The valve core rod 19 is rotatably arranged to drive the moving plate 16 to rotate relative to the stationary plate 17. The stationary plate 17 is provided with a first through hole 170 and a first vent hole 171. The moving plate 16 is provided with a second through hole 160 corresponding to the first through hole 170 and a second vent hole 161 corresponding to the first vent hole 171. The valve body assembly 2 is provided with a ventilation channel, which is connected to the first ventilation hole 171 and the second ventilation hole 161.

[0032] The innovative design of the valve core assembly 3 and the ventilation channel connected to it in the above-mentioned technical solution of this utility model achieves the function of antifreeze drainage.

[0033] The valve body assembly 2 serves as the main structure, forming an internal water flow channel. The valve core assembly 3 is securely installed within the valve body assembly 2 through a hexagonal structure at its bottom that mates with a hexagonal hole at the bottom of the valve body assembly 2, ensuring that the valve core assembly 3 itself does not rotate. The valve body assembly 2 is made of H59-1 copper.

[0034] The core of the valve core assembly 3 is a ceramic disc pair. The stationary disc 17 is fixed by a structure on the valve core housing 20, keeping it stationary in any state. The moving disc 16 engages with the boss 190 on the bottom of the valve core rod 19 through a groove at its bottom, allowing the rotation of the valve core rod 19 to precisely drive the moving disc 16 to rotate as well. The stationary disc 17 can be a ceramic stationary disc made of 95% alumina ceramic, and the moving disc 16 can also be a ceramic moving disc made of 95% alumina ceramic. The upper end of the valve core rod 19 passes through the valve core housing 20 and is pressed by the nut 8 to the internal components, including the first friction pad 7, the second friction pad 21, and the sealing rings 6, 10, 11, 12, 15, 22, and 23, ensuring smooth rotation and good overall sealing. The handle 4 is fixedly connected to the top of the valve core rod 19 by screws 5 for user operation.

[0035] The stationary plate 17 is designed with a first through hole 170 (a fan-shaped water inlet hole that penetrates the stationary plate) and a first vent hole 171 (a fan-shaped non-through hole). The moving plate 16 is correspondingly designed with a second through hole 160 (a fan-shaped water outlet) and a second vent hole 161 (a fan-shaped non-through hole). The moving plate 16 also has a circular through hole 162 at its center, which communicates with the second vent hole 161.

[0036] Its antifreeze and drainage working principle is as follows: When it is necessary to drain the water in the valve to prevent freezing, the user must first turn on the connected shower head, and then rotate the handle clockwise by about 30 degrees from the closed position to enter the "ventilation and drainage" position. At this time, the second through hole 160 of the moving plate 16 is completely misaligned with the first through hole 170 of the stationary plate 17, cutting off the water inlet. At the same time, the second vent hole 161 on the moving plate 16 and the first vent hole 171 on the stationary plate 17 are aligned with each other, allowing external air to enter and break the vacuum state in the valve body. The residual water is then completely drained by the shower head under the action of gravity.

[0037] External air enters through the air inlet of valve body assembly 2, flows into the through hole 162 of moving plate 16 through the axial vent hole inside valve core shaft 9, and then enters the internal cavity of valve body assembly 2 through the channel formed by the second vent hole 161 and the first vent hole 171. The entry of air breaks the vacuum state inside the valve body, allowing water remaining in valve body assembly 2 and external connecting hose to be quickly and completely discharged from the outlet (such as a shower head) under the action of gravity, thereby completely avoiding the risk of valve body cracking due to water freezing.

[0038] like Figure 4 and 5 In the water-out state, the corresponding diagrams of the stationary plate 17 and the moving plate 16 are shown. The stationary plate 17 is fixed to the valve core housing 20 and does not rotate. The moving plate 16 rotates due to the rotation of the valve core rod 19, cooperating with the stationary plate 17 to open and close the valve. The two are sealed by a planar fit. In the water-out state, the second through hole 160 (i.e., the water outlet) of the moving plate 16 is aligned with the first through hole (i.e., the water inlet) on the stationary plate 17, and the water inlet is open. Water flows from the water inlet on the stationary plate 17 to this valve body assembly and exits through the water outlet. At this time, the air inlet passage is closed.

[0039] like Figure 6 and 7 The corresponding diagram of stationary plate 17 and moving plate 16 when they are in the off state. Existing technology uses traditional outdoor water faucets, which typically only have a simple on / off function. When closed, a large amount of water accumulates inside the valve body, the connected long hose, and the shower head. Because the shower head orifices are small and cannot effectively allow air to enter, a sealed space is formed, and this water cannot drain out on its own. In extremely cold environments, the accumulated ice expands and can easily cause the valve body, pipes, or shower head to burst.

[0040] To solve this problem, existing technologies typically employ two solutions: one is to install an independent drain valve at the lowest point of the pipeline, which requires manual periodic opening for drainage, is cumbersome and easy to forget, and the additional valve also increases costs and potential leak points; the other is to use heating devices such as electric heating tape, which consumes electricity, poses a risk of electric leakage, and increases operating costs.

[0041] Compared with the prior art, the significant advantages of this utility model are: High integration and automatic drainage: This utility model integrates the drainage function into the valve core. The drainage mode can be triggered with one button by rotating the valve. There is no need for users to remember additional operations or install additional equipment. It is simple and reliable.

[0042] Zero energy consumption and water saving: Drainage is achieved entirely through physical principles and structural design, without consuming any energy (such as electricity), and only residual water in the valve is discharged during the drainage process, without wasting drinking water.

[0043] Fundamental solution: It eliminates the water storage space inside the valve body from the source, realizing "open when water is needed and drain when water is turned off", and the antifreeze effect is thorough, far exceeding the remedial heating solution after the fact.

[0044] Low cost: Compared to adding a drain valve or electric heating system, this solution only involves innovative design based on the existing ceramic valve core, resulting in minimal increase in production costs while achieving significant functional value-added.

[0045] In another technical solution, the valve core housing 20 is provided with a water passage positioning groove 201, a closed position positioning groove 202 and a vent positioning groove 203; The valve core assembly 3 also includes a ball 13 and a spring 14. Under the action of the spring 14, the ball 13 cooperates with the water supply positioning groove 201, the closed position positioning groove 202 or the air supply positioning groove 203 to form a position positioning. When the ball bearing 13 engages with the water-passing positioning groove 201, the second through hole 160 of the moving plate 16 is completely aligned with the first through hole 170 of the stationary plate 17, and the first vent hole 171 of the stationary plate 17 is completely offset from the second vent hole 161 of the moving plate 16. The water inlet channel of the valve body assembly 2 is connected through the aligned first through hole 170 and second through hole 160, and the connection between the vent channel and the first vent hole 171 and second vent hole 161 is blocked. When the ball bearing 13 engages with the off position positioning groove 202, the second through hole 160 of the moving plate 16 is completely aligned with the first through hole 170 of the stationary plate 17. When the moving plate 16's second vent hole 161 and the stationary plate 17's first vent hole 171 are completely misaligned, the water inlet channel and the air inlet channel of the valve body assembly 2 are both blocked. When the ball 13 engages with the air positioning groove 203, the moving plate 16's second vent hole 161 and the stationary plate 17's first vent hole 171 are completely aligned, and the moving plate 16's second through hole 160 and the stationary plate 17's first through hole 170 are completely misaligned. The air inlet channel of the valve body assembly 2 is connected to the internal cavity of the valve body assembly 2 through the aligned first vent hole 171 and second vent hole 161, and the water inlet channel is blocked.

[0046] The above-mentioned technical solution of this utility model aims to provide users with a clear, reliable gear operation experience with tactile feedback.

[0047] The core of this implementation is that three positioning grooves with specific angular relationships are precisely machined on the end face of the valve core housing 20: a water-flow positioning groove 201, a closed-position positioning groove 202, and a venting positioning groove 203. These three grooves precisely correspond to the three working positions of the faucet: water flow, closed position, and venting / draining position.

[0048] Within the valve stem 19 or its associated components, there is a receiving cavity in which a spring 14 and a ball bearing 13 are placed. The spring 14 continuously applies a pressure to the ball bearing 13 against the end face of the valve stem housing 20.

[0049] Its working process is as follows: When the user rotates handle 4, valve core rod 19 rotates accordingly, causing the internal ball bearing 13 to move relative to the fixed valve core housing 20. When rotated to the target position, the ball bearing 13 will fall into the corresponding positioning groove (water positioning groove 201, off position positioning groove 202, or vent positioning groove 203) under the push of spring 14.

[0050] When the marble 13 falls into the water-filling positioning groove 201, it makes a "click" sound, corresponding to the water outlet position of the faucet. Continuing to rotate clockwise 120°, the marble 13 falls into the off-position positioning groove 202, making another "click" sound, corresponding to the off position. Then, rotating clockwise another 30°, the marble 13 falls into the venting positioning groove 203, making another "click" sound, corresponding to the venting position. Users can accurately determine the current position by the "click" sound and the rotation angle. The angles between the water-filling positioning groove 201 and the off-position positioning groove 202, and between the off-position positioning groove 202 and the venting positioning groove 203, are not limited to the angles specified in this technical solution; other angles can be selected to accurately distinguish between different positions.

[0051] This design ensures that each of the three function positions has a clear physical positioning point, preventing problems such as incomplete gear shifting due to vague feel (e.g., incomplete closing or exhaust not being opened).

[0052] Existing technology uses outdoor faucets with ordinary dual-position (on / off) ceramic valve cores. These valve cores typically only have two positions: closed and open. Their positioning feel is weak, sometimes relying solely on the friction of the sealing ring to provide tactile feedback, resulting in unclear positional feedback. When operating the faucet, users cannot accurately determine whether the valve core is fully closed or fully open by feel, easily getting stuck in the middle position, leading to incomplete closure and leakage, or failing to accurately enter the third position dedicated to air venting.

[0053] Compared with the prior art, the significant advantages of this utility model are: Precise and reliable operation: Through the mechanical cooperation of the ball 13 and three precision-machined positioning grooves, namely the water positioning groove 201, the closing position positioning groove 202, and the air positioning groove 203, the precise positioning of the three positions is achieved, effectively avoiding functional failures caused by improper operation (such as not being able to close tightly or not being able to release air).

[0054] Clear tactile and auditory feedback: The "click" sound and obvious change in resistance produced when the 13 marble falls into the positioning groove provide users with clear and unambiguous operational feedback. Even if the user does not look directly at the faucet, they can accurately judge the current gear by touch, which greatly improves the user experience and operational reliability.

[0055] Simple and durable structure: The positioning mechanism consists only of a ball, a spring, and a positioning groove machined on the valve body. The structure is very simple, requiring no complex electronic sensors or additional parts. It has stable performance, long service life, and low cost.

[0056] In another technical solution, the valve core rod 19 is connected to the moving plate 16 via the valve core shaft 9; The valve core shaft 9 has an axial vent hole inside; the axial vent hole is connected to the second vent hole 161 of the moving plate 16.

[0057] The present invention aims to provide an efficient, concealed, and reliable airflow path.

[0058] In this embodiment, the valve core rod 9 has a boss 190 at its bottom, which directly engages with the drive groove on the moving plate 16. When the valve core rod 9 rotates, the moving plate 16 rotates relative to the stationary plate 17 through the engagement of the boss 190 and the drive groove. The valve core shaft 9 has an axial vent hole inside, which is only used to connect the venting channel and does not participate in torque transmission.

[0059] The axial vent hole forms the core of the ventilation channel. Its lower end connects to the through hole 162 located at the center of the moving plate 16, and the through hole 162 is connected to the second vent hole 161 on the moving plate 16. When the faucet is switched to the ventilation position, the flow path of the external air is as follows: it enters from the air inlet of the valve body assembly 2, immediately passes through the axial vent hole inside the valve core shaft 9, flows upward (relative to the installation posture), turns into the second vent hole 161 through the connected through hole 162, and finally enters the valve body through the first vent hole 171 on the aligned stationary plate 17.

[0060] This design integrates the key ventilation channel inside the core transmission component, valve spindle 9, forming a compact and direct airflow path.

[0061] To achieve drainage and freeze protection functions, existing technologies typically employ external piping. For example, a separate vent pipe or drain valve is connected to the outside of the valve body, or a complex, circuitous air passage is designed inside the valve body. These external piping systems or complex air passages not only increase the overall size and structural complexity of the product but also introduce more potential leakage points, reducing product reliability. Furthermore, external piping affects the product's aesthetics and is easily damaged during installation or use.

[0062] Compared with the prior art, the significant advantages of this utility model are: Highly integrated and compact structure: The ventilation function is creatively integrated into the existing transmission component valve spindle 9, achieving functional integration. There is no need to open up complex external air passages or connect external pipes on the valve body assembly 2, making the entire valve body structure very compact and minimizing its size.

[0063] Highly efficient and direct air path: The axial vent provides an almost straight, low-resistance air path, ensuring that air can enter the valve body quickly and smoothly, thereby greatly improving drainage speed and efficiency.

[0064] High reliability and sealing: The venting channel is built into a metal shaft, providing excellent protection and avoiding the risk of damage from external impacts or aging. This design also reduces the number of sealing points required in the entire venting system, lowering the probability of leakage and improving the long-term reliability of the product.

[0065] Aesthetically pleasing and easy to install: With no exposed additional pipes, the product has a clean and beautiful appearance, no different from a traditional faucet. At the same time, the installation method is exactly the same as that of a traditional faucet, requiring no special installation skills or extra space.

[0066] In another technical solution, the valve core assembly 3 also includes a first friction pad 7, a second friction pad 21, and a nut 8; the first friction pad 7 is disposed between the handle 4 and the valve core housing 20, and the second friction pad 21 is disposed between the stationary plate 17 and the valve body assembly 2; the nut 8 is threadedly connected to the valve core rod 19 and is used to press the internal components of the valve core assembly 3.

[0067] The above-mentioned technical solution of this utility model is an optimization of the assembly structure and friction of the valve core assembly 3, which aims to ensure smooth operation of the valve core, comfortable feel, and long-term reliable sealing.

[0068] In this embodiment, the valve core assembly 3 is assembled following a precise stacking sequence. The valve core rod 19 passes sequentially through the following components: the valve core housing 20, the first friction pad 7, and the handle 4. Then, the nut 8 is screwed onto the threaded portion at the top of the valve core rod 19 from above.

[0069] The first friction pad 7 is precisely positioned between the lower surface of the handle 4 and the upper surface of the valve core housing 20. Its core function is to act as a low-friction interface. When the user rotates the handle 4, this pad effectively reduces the sliding friction and wear between the bottom of the handle 4 and the fixed valve core housing 20. This not only makes operation easier and smoother but also avoids direct friction between metal parts, preventing a stiff operating feel or abnormal noise caused by prolonged use, thereby extending service life.

[0070] The second friction pad 21 is disposed between the bottom of the stationary plate 17 and the mounting surface of the valve body assembly 2. This pad also serves to reduce friction, ensuring that the stationary plate 17 does not generate unnecessary friction on the fixed contact surface with the valve body assembly 2 due to minor displacement or vibration. For example, both the first friction pad 7 and the second friction pad 21 are precision injection molded parts made of POM-C (polyoxymethylene) material. The coefficient of friction is as low as 0.1-0.3 (for steel), resulting in minimal wear. During assembly, a small amount of food-grade silicone grease can be applied to the surface of the pad in contact with the ceramic plate to further optimize the initial feel and protect the surface of the parts. By applying an appropriate torque (an optimal value can be determined experimentally, for example, 1.5-2.5 N·m) through the nut 8 to tighten the entire valve core assembly, the POM-C material pad provides stable and reliable support, ultimately achieving optimal performance of easy operation, clear feel, and leak-proof operation. You can also choose PA (nylon), especially reinforced nylon, such as PA66 (nylon 66) and PA66+GF30 (with 30% glass fiber reinforcement).

[0071] Nut 8 is threaded to the valve core rod and is used to tighten the internal components of the valve core assembly, ensuring sealing and operational stability. It applies an adjustable and uniform axial preload to the entire valve core stack structure (typically including the valve core rod 19, first friction pad 7, second friction pad 21, valve core housing 20, and various internal sealing rings 6, including sealing ring 6, sealing ring one 10, sealing ring two 11, sealing ring three 12, sealing ring four 15, sealing ring five 22, sealing ring six 23, etc., and moving plate 16 and stationary plate 17). This preload needs to be precisely controlled: if the preload is too small, the internal sealing rings may not be properly tightened, causing leakage, or the valve core assembly 3 may wobble during operation. If the preload is too large, the clamping force between the ceramic moving plate 16 and the stationary plate 17 will be too high, resulting in excessive friction when rotating the handle 4, making operation very difficult.

[0072] Therefore, adjusting nut 8 ensures that all internal components are firmly clamped to achieve a seal, while optimizing the two friction pads keeps the operating torque within the optimal range, achieving a perfect balance between sealing performance and operating feel.

[0073] In existing technologies, valve core fixing and sealing typically rely on simple threaded clamping or snap-fit ​​structures, often neglecting the long-term stability of the operating feel. Many products lack dedicated friction washers between the handle and valve body, resulting in direct metal-to-metal contact. After a period of use, this can easily lead to loosening, abnormal noise, or increased operating force due to wear. Furthermore, the function of the clamping nut is often only understood as preventing leaks, with insufficient recognition of its crucial role in adjusting the operating feel. This lack of precise torque control during assembly results in inconsistent product experiences, ranging from leaks to excessively difficult operation.

[0074] Compared with the prior art, the significant advantages of this utility model are: Optimized operation feel and durability: By setting the first friction pad 7 and the second friction pad 21, the friction and wear of the rotating parts are effectively reduced, ensuring that the faucet maintains a smooth and stable operation feel throughout its entire life cycle, and eliminating abnormal noises caused by metal friction.

[0075] High sealing reliability: The adjustable axial preload provided by nut 8 ensures that all sealing rings are evenly compressed, fundamentally preventing the risk of water leakage from the top of the valve core and various interfaces.

[0076] Achieving functional balance: The structural design scientifically balances the contradiction between "the clamping force required for sealing" and "the rotational force required for operation". Through the combination of adjustable nuts and low-friction washers, it achieves the ideal effect of both absolute sealing and easy operation.

[0077] Simple and effective structure: All functions are achieved through a simple mechanical structure, without the need for complex devices, resulting in low cost and extremely high reliability.

[0078] In another technical solution, the outdoor antifreeze faucet also includes: An anti-siphon check valve 1 is disposed in the water inlet channel of the valve body assembly 2 and located at the front end of the water inlet channel; the anti-siphon check valve 1 includes a check valve housing, a piston, a sealing ring, and a spring; the check valve housing is connected to the valve body assembly 2; the piston is movably disposed within the check valve housing; the sealing ring is disposed on the piston; the spring is disposed within the check valve housing and provides a preload force to the piston to move it toward the closed position.

[0079] The above-mentioned technical solution of this utility model is to provide a safety protection mechanism that is integrated inside the faucet and responds automatically, in response to the potential siphon pollution problem in outdoor water use scenarios.

[0080] The anti-siphon check valve 1, as an independent modular component, is directly installed at the very front of the water inlet channel of the valve body assembly 2, i.e., the part where water first enters the faucet. Its core component includes a check valve housing, which is securely connected to the water inlet connector 18 of the valve body assembly 2 by means of threads or other methods.

[0081] The anti-siphon check valve 1 is a conventional component. It is located at the front end of the water inlet channel of the valve body assembly 2 and includes a check valve body, piston, sealing ring, and spring. When the valve core is in the open water outlet state, if the outdoor water supply is suddenly interrupted, negative pressure is generated in the pipeline. The spring pushes the piston to press the sealing ring against the valve seat, automatically closing the channel and preventing external sewage from being drawn back into the water supply network through the siphon effect. During normal water supply, the water pressure overcomes the spring preload and pushes the piston to open the channel, ensuring normal water flow. The anti-siphon check valve 1 is made of food-grade silicone material.

[0082] Its working principle is as follows: Under normal water supply conditions, the water flow from the pipe network has sufficient pressure to overcome the preload of the spring, push the piston backward, compress the spring, and thus open the channel, allowing the water flow to smoothly pass through the one-way valve 1 and enter the valve body assembly 2.

[0083] When the outdoor water supply is suddenly interrupted, the water in valve assembly 2 and the subsequently connected hoses and showerhead will flow back under gravity. At this time, the pressure in the pipes drops rapidly, even creating negative pressure (vacuum). Once negative pressure is generated, its direction of action is opposite to the normal water pressure. At this moment, the preload of the spring quickly takes effect, pushing the piston forward and pressing the sealing ring on it tightly back onto the valve seat, instantly cutting off the reverse flow from the faucet to the water supply network. This effectively prevents the backflow of sewage, stagnant water, and other unclean liquids soaked in the showerhead or hose end into the clean water supply network due to the siphon effect, ensuring the safety of the family's drinking water.

[0084] Existing technology uses ordinary outdoor faucets, which do not have any anti-siphon function. To solve the siphon contamination problem, two external solutions are usually adopted: one is to install an anti-siphon vacuum breaker separately on the water supply line. This device is usually large, requires additional space and fittings for installation, is costly, and affects aesthetics; the other relies on the user's own risk awareness, requiring manual disconnection of the hose connection during water outages. This method has extremely low reliability and is very easy for contamination to occur due to user forgetfulness or negligence.

[0085] Compared with the prior art, the significant advantages of this utility model are: High integration and built-in protection: The anti-siphon function is directly integrated into the faucet valve body in the form of a compact one-way valve1, without any external additional devices. The product looks no different from an ordinary faucet, making installation simple and saving space.

[0086] Fully automatic instant response: Based on the principle of pressure difference and mechanical spring, it automatically triggers shutdown the moment negative pressure is generated when the water supply stops. The response speed is fast, no manual intervention is required, and the reliability is far higher than that of methods that rely on user operation, truly achieving anti-siphon safety protection.

[0087] High safety and reliability: As a physical and mechanical structure, it has stable performance, does not rely on electricity or other external energy sources, has a long service life, and fundamentally eliminates the risk of siphon pollution.

[0088] Significant cost-effectiveness: Compared to installing an external anti-siphon device, this solution integrates functions, increases overall cost only slightly, but provides crucial water quality safety assurance, making it of great value.

[0089] In another technical solution, the valve core assembly 3 has a hexagonal structure at its bottom that mates with a corresponding hexagonal structure at the bottom of the valve body assembly 2; this mate is used to prevent the valve core assembly 3 from rotating within the valve body assembly 2.

[0090] The above-mentioned technical solution of this utility model aims to solve the fundamental assembly and operation problem of the valve core assembly 3 rotating unexpectedly within the valve body assembly 2. Its core lies in a simple and efficient mechanical interlocking structure.

[0091] The key design feature of this embodiment lies in the geometry of the mating area between the valve core assembly 3 and the valve body assembly 2. Specifically, at the bottom of the valve core assembly 3, its outer contour is machined into a standard hexagonal structure (i.e., a regular hexagonal cross-section). Correspondingly, at the bottom of the internal cavity of the valve body assembly 2, a hexagonal hole that perfectly matches the dimensions of the aforementioned hexagonal structure is precisely machined.

[0092] Its working principle is as follows: During final assembly, the operator aligns the valve core assembly 3 with the mounting port of the valve body assembly 2, ensuring that the hexagonal structure at the bottom of the valve core assembly 3 aligns with the hexagonal hole at the bottom of the valve body assembly 2, and then presses it into place axially. Once assembled, the two hexagonal structures interlock, forming an efficient circumferential constraint.

[0093] When the user rotates handle 4, the torque applied to valve core rod 19 is transmitted through valve core shaft 9, ultimately driving the moving plate 16 to rotate relative to the stationary plate 17. Because the overall housing of valve core assembly 3 (valve core housing 20) is firmly locked to valve body assembly 2 via a hexagonal fit, it cannot undergo any circumferential rotation or offset. All rotational movements are precisely limited to the moving parts inside the valve core, thus ensuring: The alignment accuracy of the ceramic disc pair: The stationary disc 17 is firmly fixed inside the non-rotatable valve core housing 20, and the positions of the through hole and vent hole on it always remain unchanged, providing a stable reference for the precise rotation of the moving disc 16.

[0094] Effective transmission of operating force: The rotational force applied to the handle 4 is fully used to overcome the friction between the ceramic plates and the resistance of the ball positioning mechanism, without being wasted on twisting the entire valve core assembly 3, resulting in a clear and efficient operating feel.

[0095] Sealing reliability: Prevents wear or shearing of sealing rings 22 and 23 between the valve core assembly 3 and the valve body assembly 2, which may be caused by the overall rotation of the valve core assembly 3, thus ensuring the long-term effectiveness of the seal.

[0096] In existing technologies, the anti-rotation design between the valve core and the valve body typically employs the following simple methods: Flat bayonet: One or two small flat protrusions are set at the bottom of the valve core, which mate with corresponding grooves in the valve body. This fit has a large amount of play, resulting in low anti-rotation reliability. After repeated operations, it is prone to loosening due to wear, causing the valve core to wobble.

[0097] Screw tightening: After the valve core is installed in the valve body, a screw is screwed in from the side to hold the valve core in place and prevent it from rotating. This method not only increases the number of parts and assembly steps, but more importantly, the tightening force of the screw can damage the roundness of the valve core, potentially causing deformation of the valve core housing. This, in turn, affects the flat fit of the internal moving and stationary plates, ultimately leading to leakage or malfunction. At the same time, the side screw also creates a potential leakage point.

[0098] Interference fit: This method relies on the enormous friction between the rubber seal and the inner wall of the valve body to prevent rotation. This method is extremely unreliable, as the friction can change due to lubrication, wear, and aging. This may result in extremely difficult operation initially, and later, due to a decrease in friction, the valve core may spin and become inoperable.

[0099] Compared with the prior art, the significant advantages of this utility model are: Absolutely reliable anti-rotation: The six-way coordination provides continuous, non-spillable circumferential locking, fundamentally eliminating the possibility of the valve core assembly 3 rotating under any circumstances, resulting in extremely high reliability.

[0100] Non-destructive installation and high performance: This fitting method is a pure geometric fit, requiring no additional locking force. Therefore, it does not generate any lateral stress on the valve core assembly 3 (especially the precision ceramic disc) that could cause deformation, perfectly maintaining the product's sealing performance and operating feel.

[0101] Easy assembly and precise positioning: The hexagonal structure has natural guidance properties. During assembly, it can be easily inserted simply by aligning the angle. It can also automatically achieve precise circumferential positioning, ensuring the accurate direction of the outlet and greatly improving production efficiency and assembly consistency.

[0102] Simple structure and low cost: This design only requires making the corresponding hexagonal shape on the mold of the valve core housing 20 and the valve body assembly 2, without adding any extra parts, yet it achieves the best anti-rotation effect and has a very high cost performance.

[0103] In another technical solution, the mounting section of the valve body assembly 2 is configured as an extended structure that can be embedded in the wall; the axis of the valve body assembly 2 is set at an angle to the mounting plane.

[0104] The core of this implementation lies in the overall shape and installation posture of the valve body assembly 2. First, the installation section of the valve body assembly 2 (i.e., the part that normally passes through the wall and is locked with a nut) is significantly lengthened. This design allows it to be deeply embedded in the pre-drilled hole in the wall, thereby greatly enhancing the faucet's installation stability and anti-shaking ability on the wall, enabling it to withstand greater lateral forces, and making it suitable for outdoor environments with frequent operation.

[0105] Secondly, and more importantly, the axis of the entire valve body assembly 2 is not perpendicular to the mounting wall, but rather designed to maintain a fixed, slight downward tilt angle with the mounting plane (i.e., the wall). According to engineering optimization, this tilt angle is typically set to approximately 3 degrees. This angle not only facilitates wall-mounted installation but also utilizes gravity to guide residual water in the venting channel for rapid drainage. Combined with the siphon effect, it accelerates the emptying of water accumulated in the valve body and external hoses, enhancing the antifreeze effect. During installation, it is essential to ensure that the outlet end of the faucet is lower than the end of the valve body embedded in the wall.

[0106] This slight tilt angle plays a crucial role in the operation of the "ventilation and drainage" function: Auxiliary drainage: When the valve core switches to the venting and drainage state, air enters the valve body, and residual water is mainly discharged from the outlet. However, a very small number of water droplets may remain near the venting channel due to surface tension and other factors. The 3-degree tilt design of the valve body utilizes gravity to provide a clear guide for these residual water droplets, allowing them to flow downwards and be completely discharged from the outlet, preventing water from accumulating at the critical point.

[0107] Enhanced siphon effect for faster drainage: When water drains from the showerhead at the end, the entire water path (valve body + hose + showerhead) forms a U-shaped siphon. The inclined venting channel inside the valve body becomes the highest point of this siphon. Once drainage begins, the water is drawn out by gravity, creating negative pressure at the venting channel at the highest point. This negative pressure strongly draws in air, greatly accelerating the drainage process and achieving faster and more thorough emptying.

[0108] The valve body assembly features an axially elongated design, with key components embedded in the wall insulation layer. An optional L-shaped elbow structure can be used to introduce the drainage section into the room, and the ventilation channel adopts a large-angle design to avoid water accumulation.

[0109] Existing technology is the traditional straight-through outdoor faucet. Its valve body is typically short, and almost without exception, it is installed perpendicular to the wall. This traditional method has two inherent drawbacks: Potential water accumulation: When draining water, the internal channels of vertically installed valve bodies are prone to forming puddles or traps, especially in complex structures such as vents. Some water cannot drain away naturally by gravity, creating a potential risk of freezing and cracking in winter.

[0110] Relying on manual labor: To achieve complete drainage, users usually need to lift or swing the hose to change its shape to drain the water. This is not only cumbersome, but users are also very likely to forget this step, leading to antifreeze failure.

[0111] Compared with the prior art, the significant advantages of this utility model are: Passive Complete Drainage: Through a clever design with a 3-degree tilt angle, the requirement for "complete drainage" is transformed into a gravity-driven passive process. Without any additional user intervention, it ensures that all residual water within the valve body is completely guided to the outlet for discharge, fundamentally improving antifreeze reliability.

[0112] Enhanced performance using physical principles: This design cleverly utilizes the siphon effect principle, creating negative pressure to not only drain the water from the valve body but also accelerate the drainage process in the external hose, making drainage more efficient and thorough.

[0113] Reliable structure and easy installation: The extended installation section provides installation strength and stability far exceeding that of traditional faucets, better resisting accidental impacts and frequent operation during outdoor use. The tilt angle is guaranteed by the structure during production and installation, and for users and installers, the installation process is exactly the same as that of ordinary faucets, requiring no special steps, yet achieving excellent antifreeze performance.

[0114] In another technical solution, the first through hole 170 of the stationary plate 17 is a fan-shaped through hole penetrating the stationary plate; the second through hole 160 of the moving plate 16 is a fan-shaped water outlet with a central angle of 120 degrees, and the center of the moving plate 16 is provided with a circular through hole 162 that communicates with the second vent hole 161.

[0115] The above-mentioned technical solution of this utility model optimizes the hole shape of the core components of the valve core—the stationary plate 17 and the moving plate 16—aiming to accurately realize the three-level function switching and optimize the operating experience.

[0116] The core of this implementation lies in the specific geometry of the through holes on the stationary plate 17 and the moving plate 16. (See attached image) Figure 2 and 3As shown, the first through hole 170 on the stationary plate 17 is designed as a fan-shaped through hole. Similarly, the second through hole 160 on the moving plate 16 is also designed as a fan-shaped outlet. This fan-shaped outlet is not a complete circular opening; its two sides are defined by the two radial sides of the fan, which makes its central angle precisely defined as 120 degrees. The fan-shaped first through hole 170 on the stationary plate 17 runs through the entire stationary plate 17, ensuring that water can flow smoothly; the moving plate 16 has a circular through hole 162 machined in the center, which is directly connected to the second vent hole 161 on the moving plate 16, forming a key channel for air to enter the valve body.

[0117] This geometric design closely corresponds to the operating logic of the faucet: Functional correspondence: The total rotation stroke of valve core rod 19 is 150 degrees, divided into three distinct positions (0 degrees for water outlet, 120 degrees for shut-off, and 150 degrees for drain and venting). The fan-shaped water outlet with a central angle of 120 degrees on the moving plate 16 corresponds precisely to the 120-degree rotation required to move from the "water outlet" position to the "shut-off" position. Summer mode: Normal use between 0-120 degrees, maintaining a complete seal when shut off. Winter mode: After use, rotate to the 150-degree drain position; external air enters through the air inlet and the water inside the valve body is automatically discharged; rotate back to the 120-degree shut-off position to lock.

[0118] Precise control: When the moving plate 16 rotates, the overlapping area of ​​its 120-degree fan-shaped outlet and the fan-shaped inlet 170 of the stationary plate 17 changes accordingly, thereby achieving linear adjustment of water flow from fully open to fully closed. When rotated to 120 degrees, the solid part of the moving plate 16 completely covers the inlet 170 of the stationary plate 17, achieving a sealed closure. When rotated further to 150 degrees, the fan-shaped outlet 160 of the moving plate 16 is completely offset from the inlet 170 of the stationary plate 17, but at the same time, its second vent 161 aligns with the first vent 171 on the stationary plate 17, opening the ventilation channel.

[0119] Feel and reliability: The 120-degree gear interval is a large-angle design, which, together with the 13-positioning mechanism of the pin ball, provides users with a clear and easy-to-understand gear feel and sufficient operating space, effectively preventing mode errors caused by slight misoperation.

[0120] The existing technology uses standard ceramic valve cores, which are commonly used in outdoor faucets. This traditional design has significant drawbacks: Limited functionality: Traditional dual-hole valve cores typically only have two positions, open and closed, which cannot achieve the third "ventilation and drainage" position required by this utility model.

[0121] Ambiguous angle: Its operating rotation angle is usually 90 degrees, which is small. The gear position is not clear and it is easy to over- or under-operate.

[0122] Incomplete drainage: Even if the drainage function is barely achieved through modification, the shape and angle of its circular hole cannot accurately and reliably allocate the three functional states of "water discharge", "sealing and closing" and "ventilation" within the total stroke of 150 degrees like this utility model, which can easily lead to incomplete closure or poor ventilation.

[0123] Compared with the prior art, the significant advantages of this utility model are: Achieving three-function integration: By precisely designing the outlet of the moving plate 16 as a fan shape with a central angle of 120 degrees, and cooperating with the 150-degree total stroke and three positioning grooves, the three functions of water outlet, shut-off and air venting / drainage are perfectly integrated on a single valve core, which is something that traditional round hole valve cores cannot achieve.

[0124] Optimized operating angle: The 120-degree gear interval (from open to closed) is greater than the traditional 90-degree valve core, making gear switching more precise and larger, effectively avoiding misoperation, and improving user experience and reliability.

[0125] Reliable sealing and switching: The fan-shaped radial edge provides a clear sealing boundary, ensuring that when the position is closed, the moving plate 16 can completely and reliably cover and seal the water inlet 170 of the stationary plate 17, eliminating the possibility of leakage. Its shape also ensures that the vent can be accurately opened when rotated to the venting position.

[0126] In another technical solution, the one-way valve housing of the anti-siphon check valve 1 is connected to the water inlet connector 18 of the valve body assembly 2.

[0127] The above-mentioned technical solution of this utility model is a further specific definition of the integrated solution of the anti-siphon device, which aims to achieve the most efficient protection response and the most compact structural layout.

[0128] This embodiment clarifies the specific installation location of the anti-siphon check valve 1 in the entire water inlet passage. (See attached instruction manual.) Figure 1 As shown, the anti-siphon check valve 1 is not an external accessory independent of the faucet, but is directly connected to the inlet connector 18 of the valve body assembly 2 through its check valve housing.

[0129] The inlet connector 18 is part of the valve body assembly 2 and serves as the primary connection interface between the external water supply pipe and the faucet body. The housing of the one-way valve 1 is securely installed in the inner hole or port of the inlet connector 18 via a threaded connection or other means. This means that water flowing from the external pipe must first pass through the anti-siphon one-way valve 1 before flowing into the channel formed by the inlet connector 18 and continuing towards the valve core assembly 3.

[0130] This installation location has crucial strategic significance: The first line of defense: It places the anti-siphon function at the forefront of the water supply path, becoming the first and most direct barrier to protect the household water supply network. Any fluid attempting to flow backward from the faucet outlet will be intercepted by the one-way valve 1 before entering the valve body assembly 2.

[0131] Extremely rapid response: Due to its proximity to the inlet, any negative pressure (vacuum) generated in the pipeline will immediately act on the piston of the one-way valve 1, enabling it to respond at the fastest speed and close instantly, minimizing the backflow window period of potential contaminants and ensuring extremely high safety.

[0132] Protecting the entire system: This location not only prevents siphoning through the faucet outlet, but also provides comprehensive protection against siphon contamination that may be caused by leaks in the valve body assembly 2 itself or other internal joints.

[0133] Existing technologies typically employ the following two methods to address the siphon contamination problem: External vacuum breaker: This is a stand-alone device, typically installed outside the faucet and above the faucet outlet on the pipe. It is complex in structure, bulky, inconvenient to install, and unsightly. Its protection relies on a normally open vent to the atmosphere, which is prone to clogging by impurities and is unsuitable for systems with continuous water pressure.

[0134] Terminal solutions: For example, installing an anti-siphon device at the end of a garden shower. This method offers limited protection, only preventing siphoning through that particular showerhead. If the user replaces it with a showerhead that lacks this feature, the protection immediately fails, and its reliability depends entirely on user behavior.

[0135] Compared with the prior art, the significant advantages of this utility model are: Highly integrated and compact structure: The anti-siphon function is directly built into the water inlet of the faucet in a modular form, achieving deep integration of functions. No external additional pipes or space are required. The product has a simple appearance and the installation method is exactly the same as that of ordinary faucets.

[0136] Source protection, absolutely reliable: By blocking the source of potential contamination, the thoroughness and absolute reliability of the protection are ensured. Its effectiveness does not depend on any external equipment or correct user operation, eliminating the risk from the physical structure.

[0137] Fast response and extremely high safety: Because its installation location is closest to potential risk points, it can react instantly to changes in pipeline pressure, providing the highest level of safety assurance.

[0138] High versatility: No matter what kind of hose or showerhead the user connects to the water outlet, or even if nothing is connected, the built-in anti-siphon protection is always effective, providing the user with constant safety.

[0139] In another technical solution, the bottom of the valve core rod 19 is provided with a boss 190, which cooperates with the driving groove on the moving plate 16 to drive the moving plate 16 to rotate; the valve core rod 19 is also provided with a positioning post 191, which cooperates with the arc-shaped limiting groove on the valve core housing 20 to limit the rotation angle of the valve core rod 19.

[0140] The above-mentioned technical solution of this utility model is a further optimization of the internal transmission and mechanical limiting structure of the valve core, aiming to achieve reliable power transmission and fundamentally prevent component damage caused by excessive rotation.

[0141] The core of this implementation is the integration of two key geometric features at the bottom of the valve core rod 19: a boss 190 and a positioning post 191.

[0142] The boss 190 protrudes downward from the bottom end face of the valve core 19, and its cross-sectional shape is typically non-circular (e.g., approximately rectangular or D-shaped). This boss 190 forms a precise mating relationship with the drive groove machined at the center of the back surface of the moving plate 16. When the valve core 19 rotates, the side of the boss 190 contacts the sidewall of the drive groove, thereby directly and without slippage transmitting torque to the moving plate 16, driving it to rotate precisely relative to the stationary plate 17. This rigid transmission method avoids the slippage problems that may exist in traditional friction-based transmission, ensuring the accuracy and response speed of the switching action.

[0143] The positioning pin 191 protrudes radially outward from the side of the valve core rod 19. This positioning pin 191 is embedded in a corresponding arc-shaped limiting groove machined on the inner wall of the valve core housing 20. The central angle corresponding to the arc length of this limiting groove is precisely calculated and machined, and its range strictly limits the trajectory length that the positioning pin 191 can move within, thus strictly defining the maximum angle that the valve core rod 19 can rotate.

[0144] Its working process is as follows: When the user rotates handle 4, the valve core rod 19 rotates accordingly, and the positioning pin 191 slides along the arc-shaped limiting groove. When rotated to the desired position (e.g., 150 degrees for the vent / drain setting), the positioning pin 191 reaches the end of the limiting groove and is mechanically blocked by the groove wall, preventing further rotation. This rigid mechanical limit provides the user with an absolutely clear operating endpoint, protecting the internal ceramic moving plate 16 and stationary plate 17 from misalignment, impact, or wear due to excessive rotation, greatly improving the product's reliability and service life.

[0145] In existing technologies, the transmission between the valve core rod and the moving plate often uses a simple cylindrical fit relying on friction, or two small planes at the bottom of the rod fit into shallow grooves on the moving plate. This results in low transmission reliability and a tendency to slip. The limiting of its rotation angle typically employs the following two unreliable methods: Relying on the friction of the sealing ring for limiting: This increases the rotational resistance to indicate to the user that the valve is in position, but it cannot accurately stop the continued rotation and is prone to damage to the valve core if the user applies too much force.

[0146] Limiting the valve position by having the valve core handle contact the valve body: This method limits the position by having the handle collide with the valve body surface after rotating a certain angle. This method produces impact noise, easily wears down the handle or valve body with long-term use, and the limiting is not accurate.

[0147] Compared with the prior art, the significant advantages of this utility model are: Precise and reliable transmission: The rigid fit between the boss 190 and the drive groove enables precise torque transmission without slippage, ensuring that the rotation angle of the moving plate 16 is completely synchronized with the input angle of the valve core rod 19, resulting in direct operation response and precise control.

[0148] Absolutely reliable mechanical stop: The engagement of the positioning pin 191 with the arc-shaped limit groove provides a built-in, absolute mechanical hard stop. This method of limiting is accurate and reliable, with a clear tactile feel, and effectively prevents any form of over-rotation, fundamentally protecting the precision ceramic valve plate and eliminating product damage caused by misoperation.

[0149] Integrated structure, no additional parts required: The boss and positioning post are inherent structural features on the valve core rod 19, which are formed in one piece by machining. No additional transmission or limiting parts need to be assembled. The structure is simple and compact, low in cost and extremely reliable in performance.

[0150] This utility model's outdoor antifreeze faucet utilizes a ventilation and drainage system, which can drain water from the valve body and external hose within 3 seconds in the ventilation setting. Testing has shown it can operate normally in temperatures as low as -25℃, effectively preventing valve body breakage due to freezing in winter. Simultaneously, the anti-siphon one-way valve has a response time of <0.5 seconds, quickly preventing siphon contamination during water outages and ensuring water quality safety. It boasts a long service life: the ceramic valve core has a lifespan of up to 300,000 cycles, and the extended valve body design reduces the risk of freezing damage, with an expected service life of 8-10 years. Operation is simple: clear tactile feedback for different settings eliminates the need for additional tools, making it easy for the elderly and children to use.

[0151] Although the technical solution of this utility model has been disclosed above, it is not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and embodiments shown and described herein.

Claims

1. An outdoor freeze-proof faucet, characterized by, include: Valve body assembly, which has an inlet and an outlet; A valve core assembly is installed inside a valve body assembly. The valve core assembly includes a valve core housing, a valve core rod, a stationary plate, and a moving plate. The stationary plate is fixed to the valve core housing, and the moving plate is connected to the valve core rod. The valve core rod is rotatably arranged to drive the moving plate to rotate relative to the stationary plate. The stationary plate is provided with a first through hole and a first vent hole, and the moving plate is provided with a second through hole corresponding to the first through hole and a second vent hole corresponding to the first vent hole. The valve body assembly is provided with a ventilation channel, which is connected to the first ventilation hole and the second ventilation hole.

2. The outdoor frost-proof faucet of claim 1, wherein The valve core housing is provided with a water passage positioning groove, a shut-off position positioning groove, and a vent positioning groove; The valve core assembly also includes a ball and a spring. Under the action of the spring, the ball cooperates with the water supply positioning groove, the closed position positioning groove or the air supply positioning groove to form a position positioning. Specifically, when the ball is engaged with the water-passing positioning groove, the second through hole of the moving plate is completely aligned with the first through hole of the stationary plate, and the first vent hole of the stationary plate is completely offset from the second vent hole of the moving plate. The water inlet channel of the valve body assembly is connected through the aligned first and second through holes, while the air passage is blocked from communicating with the first and second vent holes. When the ball is engaged with the off position positioning groove, the second through hole of the moving plate is completely offset from the first through hole of the stationary plate, and the second vent hole of the moving plate is completely offset from the first vent hole of the stationary plate. Both the water inlet channel and the air passage of the valve body assembly are blocked. When the ball is engaged with the air-passing positioning groove, the second vent hole of the moving plate is completely aligned with the first vent hole of the stationary plate, and the second through hole of the moving plate is completely offset from the first through hole of the stationary plate. The air passage of the valve body assembly is connected to the internal cavity of the valve body assembly through the aligned first and second vent holes, while the water inlet channel is blocked.

3. The outdoor frost-proof faucet as described in claim 1, wherein, The valve core rod is connected to the moving plate via the valve core shaft; The valve core shaft has an axial vent hole inside; the axial vent hole is connected to the second vent hole of the moving plate.

4. The outdoor frost-proof faucet as described in claim 1, wherein, The valve core assembly also includes a first friction pad, a second friction pad, and a nut; the first friction pad is disposed between the handle and the valve core housing, and the second friction pad is disposed between the stationary plate and the valve body assembly; the nut is threadedly connected to the valve core rod and is used to press the internal components of the valve core assembly.

5. The outdoor frost-proof faucet as described in claim 1, wherein, Also includes: An anti-siphon check valve is disposed in the inlet channel of the valve body assembly and located at the front end of the inlet channel; the anti-siphon check valve includes a check valve body, a piston, a sealing ring, and a spring; the check valve body is connected to the valve body assembly; the piston is movably disposed within the check valve body; the sealing ring is disposed on the piston; the spring is disposed within the check valve body and provides a preload force to the piston to move it toward the closed position.

6. The outdoor frost-proof faucet as defined in claim 1, wherein The valve core assembly engages with a corresponding hexagonal structure on the bottom of the valve body assembly via a hexagonal structure on its bottom; this engagement is used to prevent the valve core assembly from rotating within the valve body assembly.

7. The outdoor frost-proof faucet as described in claim 1, wherein, The mounting section of the valve body assembly is configured as an extended structure that can be embedded in the wall; the axis of the valve body assembly is set at an angle to the mounting plane.

8. The outdoor frost-proof faucet as described in claim 1, wherein, The first through hole of the stationary plate is a fan-shaped through hole that penetrates the stationary plate; the second through hole of the moving plate is a fan-shaped water outlet with a central angle of 120 degrees, and the center of the moving plate is provided with a round through hole that is connected to the second vent hole.

9. The outdoor frost-proof faucet as defined in claim 2, wherein, The anti-siphon check valve's check valve housing is connected to the inlet connector of the valve body assembly.

10. The outdoor frost-proof faucet according to claim 4, wherein The bottom of the valve core rod is provided with a boss, which cooperates with the driving groove on the moving plate to drive the moving plate to rotate; the valve core rod is also provided with a positioning post, which cooperates with the arc-shaped limiting groove on the valve core shell to limit the rotation angle of the valve core rod.

Images