Anti-siphon overflow device, toilet water system and toilet

Abstract

The present invention discloses an anti-siphon overflow device, a toilet water system and a toilet. The anti-siphon overflow device can be installed on a water tank of the toilet and specifically comprises an upper cover and a lower seat. The upper cover is installed on the lower seat and forms a cavity with the interior of the lower seat. The upper cover comprises a cover body, a water inlet, a vent and a first flow guide structure. The water inlet and the vent are both arranged on the cover body. The lower seat comprises a lower seat body, a water outlet, an exhaust port, an overflow port and a second flow guide structure. The water outlet and the exhaust port are arranged at the bottom of the lower seat body and communicate with the interior of the water tank. The second flow guide structure is arranged below the first flow guide structure. During normal water inlet, water flows into the cavity from the water inlet and flows into the water tank through the first guide structure, the second guide structure and the water outlet in sequence. The gas in the water tank enters the cavity through the exhaust port and is discharged through the overflow port and the vent. When the water tank overflows and the water level is higher than the overflow port, the water is discharged from the overflow port. The anti-siphon and anti-overflow functions can be simultaneously realized in one structure.

Description

Technical Field

[0001] The present invention relates to the field of toilets, and in particular to an anti-siphon overflow device, a toilet water system and a toilet. Background Art

[0002] To protect water sources from contamination, anti-siphon devices are required in the toilet water system to prevent external sewage from being sucked back into the water source through the negative pressure of the toilet water system. Furthermore, to protect the electrical components and meet safety regulations, overflow devices are required to establish safe and effective drainage methods. Especially for smart toilets with a large number of electrical components, safety issues in the toilet water system require greater attention to prevent overflows and moisture damage to the electrical components.

[0003] In the traditional toilet lid internal components, anti-siphon and overflow are developed into two components: anti-siphon component and overflow device. Figure 1 As shown. The air inlet 1 of the anti-siphon component is small and can withstand weak sudden negative pressure. Under low water pressure, water enters from the water inlet 2. The water pressure does not lift the diaphragm high enough, and the air inlet 1 is not sealed, resulting in water overflow. Figure 2 As shown, the overflow device is generally integrated into the water tank assembly. The overflow port 4 has a small discharge capacity and generally needs to be higher than the ceramic surface for effective drainage. If the overflow port 4 is lower than the ceramic surface, the overflow port 4 cannot completely drain the overflowing water. In addition, the existing anti-siphon and overflow structure limits the drainage position of the base, which has poor versatility. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide an anti-siphon overflow device, a toilet water system and a toilet.

[0005] In order to achieve the above objectives, the technical solution of the present invention is:

[0006] A siphon-proof overflow device can be installed on a toilet water tank, comprising an upper cover and a lower seat, the upper cover being installed on the lower seat and forming a cavity with the interior of the lower seat, the upper cover comprising a cover body, a water inlet, an air vent and a first guide structure, the water inlet and the air vent being both arranged on the cover body, the first guide structure being arranged below the cover body, the lower seat comprising a lower seat body, a water outlet, an air vent, an overflow port and a second guide structure, the water outlet and the air vent being arranged at the bottom of the lower seat body and communicating with the interior of the water tank, the second guide structure being arranged below the first guide structure, during normal water inlet process, water flows into the cavity from the water inlet and flows into the interior of the water tank through the first guide structure, the second guide structure and the water outlet in sequence, the gas in the water tank enters the cavity through the air vent and is discharged through the overflow port and the air vent; when the water tank overflows and the water level is higher than the overflow port, the water is discharged from the overflow port.

[0007] Preferably, the first diversion structure includes a water diversion channel, which is arranged below the water inlet, with a water diversion surface and an opening provided at the bottom of the water diversion channel, and baffles provided on both sides of the bottom of the water diversion channel.

[0008] Preferably, a connecting plate is provided between the water channel and the cover body, and a recess is provided on the side of the connecting plate facing the water inlet, forming a clearance space between the recess and the water inlet.

[0009] Preferably, the second flow guide structure includes a slow flow grid and a slow flow channel. The slow flow grid includes multiple spacers protruding from the side wall of the lower seat body. The multiple spacers are arranged at intervals to form a grid structure. The bottom of the grid structure is connected to the slow flow channel, and the end of the slow flow channel is connected to the water outlet.

[0010] Preferably, a water retaining rib is provided extending downward from the opening edge of the water diversion channel, and the water retaining rib is used to guide the water in the water diversion channel to the slow flow fence.

[0011] Preferably, the bottom of the lower seat is separated by ribs to form an exhaust port and a water outlet, and the top of the ribs is higher than the bottom surface of the slow flow channel.

[0012] Preferably, the overflow port includes a first overflow port, which is arranged on the side of the top of the lower seat body and remains in a normally open state.

[0013] Preferably, the overflow port also includes a second overflow port, a third overflow port and a fourth overflow port located below the first overflow port, the first overflow port is a large-diameter overflow port, the second overflow port, the third overflow port and the fourth overflow port are all small-diameter overflow ports, and the second overflow port, the third overflow port and the fourth overflow port can be selectively opened or closed.

[0014] Preferably, the cover body and the lower seat body are connected by snap-fit connection, and a sealing ring is provided between the bottom of the lower seat body and the water tank.

[0015] A toilet water system comprises a water inlet pipe, a water tank and the above-mentioned anti-siphon overflow device, wherein the water inlet pipe is connected to the water inlet, and the bottom of the lower seat body is connected to the water tank.

[0016] A toilet comprises a toilet body and the above-mentioned toilet water system, wherein the toilet water system is installed on the toilet body.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) The anti-siphon overflow device of the present invention can integrate the anti-siphon and anti-overflow functions into one structure, which can meet more demanding water source environments, has better anti-overflow effects, more powerful anti-siphon functions, and quieter water inlet.

[0019] (2) The anti-siphon overflow device of the present invention broadens the application range of the water tank, and the water tank can be installed at a lower position, thereby improving the possibility of the internal layout of the toilet.

[0020] (3) The anti-siphon overflow device of the present invention is provided with an exhaust port and multiple exhaust paths, which improves the water inlet efficiency and can operate normally even when a large flow of water is inlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of an anti-overflow device in the prior art;

[0022] Figure 2 A schematic diagram of an anti-siphon device in the prior art;

[0023] Figure 3 This is an exploded view of the anti-siphon overflow device of Example 1 of the present application;

[0024] Figure 4 This is an installation diagram of the anti-siphon overflow device of Example 1 of the present application;

[0025] Figure 5 Schematic diagram of the upper cover of the anti-siphon overflow device according to the first embodiment of the present application;

[0026] Figure 6 This is a cross-sectional view of the upper cover of the anti-siphon overflow device according to the first embodiment of the present application, wherein A is a clearance space;

[0027] Figure 7 Schematic diagram of the lower seat of the anti-siphon overflow device of Example 1 of the present application;

[0028] Figure 8 This is a schematic diagram of the installation of the anti-siphon overflow device and the water tank of Example 1 of the present application;

[0029] Figure 9 Schematic diagram of the water and gas flow directions of the anti-siphon overflow device in the normal water inlet process of Example 1 of the present application Figure 1 ;

[0030] Figure 10 Schematic diagram of the water and gas flow directions of the anti-siphon overflow device in the normal water inlet process of Example 1 of the present application Figure 2 ;

[0031] Figure 11 Schematic diagram of the water and gas flow directions of the anti-siphon overflow device of Example 1 of the present application during normal water inflow without an exhaust port;

[0032] Figure 12 Schematic diagram of the water and gas flow directions of the anti-siphon overflow device of Example 1 of the present application in a normal water inlet process with an exhaust port;

[0033] Figure 13 Schematic diagram of the water and gas flow directions of the anti-siphon overflow device of Example 1 of the present application during an overflow process;

[0034] Figure 14 Schematic diagram of the flow directions of the water and gas paths of the anti-siphon overflow device of Example 1 of the present application during the siphoning process;

[0035] Figure 15 This is a schematic diagram of the anti-siphon overflow device of Example 1 of the present application being applied to a smart toilet;

[0036] Figure 16 This is a schematic diagram of the anti-siphon overflow device of Example 1 of the present application being arranged on the base module of the smart toilet;

[0037] Figure 17 for Figure 16 A magnified view of area B;

[0038] Figure 18 Schematic diagram of the anti-siphon overflow device of Example 2 of this application Figure 1 ;

[0039] Figure 19 Schematic diagram of the anti-siphon overflow device of Example 2 of this application Figure 2 ;

[0040] Figure 20 Schematic diagram of the water and gas flow directions of the anti-siphon overflow device in the normal water inlet process of the second embodiment of the present application Figure 1 ;

[0041] Figure 21 Schematic diagram of the water and gas flow directions of the anti-siphon overflow device in the normal water inlet process of the second embodiment of the present application Figure 2 ;

[0042] Figure 22 This is a schematic diagram of the flow directions of the water and gas paths of the anti-siphon overflow device of Example 2 of the present application when only the first overflow port is opened during overflow;

[0043] Figure 23 This is a schematic diagram of the water and gas flow directions of the anti-siphon overflow device of Example 2 of the present application when the second overflow port is opened during overflow;

[0044] Figure numerals: 100, upper cover; 101, cover body; 102, water inlet; 103, vent; 104, first flow guide structure; 105, water channel; 106, connecting plate; 107, water retaining rib; 200, lower seat; 201, lower seat body; 202, water outlet; 203, exhaust port; 204, first overflow port; 205, second flow guide structure; 206, slow flow fence; 207, slow flow channel; 208, second overflow port; 209, third overflow port; 210, fourth overflow port; 300, water tank. DETAILED DESCRIPTION

[0045] The present invention is further explained below with reference to the accompanying drawings and specific embodiments. The drawings are provided for illustrative purposes only to facilitate understanding of the present invention, and their specific proportions may be adjusted according to design requirements. Those skilled in the art will understand that the vertical relationships between components and the definitions of front and back in the figures described herein refer to the relative positions of components. Therefore, they can be flipped to present the same components, and all such representations are within the scope of this specification.

[0046] Example 1

[0047] refer to Figure 3-4 The embodiment of the present application proposes an anti-siphon overflow device, including an upper cover 100 and a lower seat 200. The upper cover 100 is installed on the lower seat 200 and forms a cavity with the interior of the lower seat 200. The cover 101 and the lower seat body 201 are connected by a snap-fit connection. The lower seat 200 is installed on the water tank 300. A sealing ring is provided between the bottom of the lower seat body 201 and the water tank 300. The interference fit connection of the sealing ring ensures good sealing between the lower seat 200 and the water tank 300. In other embodiments, the cover 101 and the lower seat body 201 can also be connected by other means such as threads, and the bottom of the lower seat body 201 and the water tank 300 can also be connected by other means. Reference Figure 5-6The upper cover 100 includes a cover body 101, a water inlet 102, an air vent 103 and a first flow-guiding structure 104. The water inlet 102 and the air vent 103 are both arranged on the cover body 101, and the air vent 103 is arranged next to the water inlet 102. The two can be connected in the cavity. Due to the existence of the air vent 103, the air pressure in the cavity is kept balanced, which can avoid the siphon phenomenon and ensure that no negative pressure is formed in the cavity. The water in the water tank 300 will not be sucked back to the water inlet 102, thereby polluting the water source. The first guide structure 104 is arranged below the cover body 101. Specifically, the first guide structure 104 includes a water channel 105, a connecting plate 106 and a water retaining rib 107. The water channel 105 is arranged below the water inlet 102. Water flowing in from the water inlet 102 can flow directly into the water channel 105. Specifically, a water guide surface and an opening are provided at the bottom of the water channel 105. Baffles are provided on both sides of the bottom of the water channel 105. The water guide surface of the water channel 105 can be a stepped surface inclined toward the opening composed of multiple planes. The baffles on both sides are combined with the water guide surface to make water flow out of the opening. The opening edge of the water channel 105 is extended downward to be provided with a water retaining rib 107. The water channel 105 ensures that the water path cannot flow to other places in the cavity. Due to the obstruction of the water retaining rib 107, the direction of the water flow is restricted, so that the water flows out downward. A connecting plate 106 is provided between the water channel 105 and the cover 101. A recess is provided on the side of the connecting plate 106 facing the water inlet 102, forming a clearance space A between the recess and the water inlet 102. The clearance space provided below the water inlet 102 ensures that water can flow away effectively and prevent accumulation when high-pressure, high-speed water is injected from the water inlet 102, meeting the standards of certain countries.

[0048] In a specific embodiment, reference Figure 7The lower seat 200 includes a lower seat body 201, a water outlet 202, an exhaust port 203, an overflow port, and a second flow-guiding structure 205. The second flow-guiding structure 205 is disposed below the first flow-guiding structure 104, allowing water flowing through the first flow-guiding structure 104 to flow directly to the second flow-guiding structure 205. Specifically, the second flow-guiding structure 205 includes a flow-slowing fence 206 and a flow-slowing channel 207. The water-retaining rib 107 can guide the water in the water channel 105 to the flow-slowing fence 206. The slow flow fence 206 includes multiple spacers protruding from the side wall of the lower seat body 201. The multiple spacers are spaced apart to form a grid structure. The grid structure can divert the water flow. The bottom of the grid structure is connected to the slow flow channel 207. The diverted water flows into the gentle slow flow channel 207, which can reduce the flow rate and achieve a smooth outflow. The end of the slow flow channel 207 is connected to the water outlet 202, and finally flows into the water tank 300 through the water outlet 202. The overflow port includes a first overflow port 204. The first overflow port 204 is located on the top side of the lower seat body 201 and remains in a normally open state. Specifically, the first overflow port 204 is a large-diameter overflow port. The bottom of the first overflow port 204 extends into the cavity to form a guide plate that does not interfere with the upper cover 100. This guide plate can guide the overflowing water to flow out of the first overflow port 204. The first overflow port 204 allows water to overflow from the first overflow port 204 in the event of overflow, and also serves as an outlet for gas to escape during normal water intake. Since the vent 103 is provided next to the water inlet 102 above the cover 101, the air pressure inside and outside the cavity is kept consistent, avoiding the generation of negative pressure and achieving an anti-siphon function. The overflow port also serves as an anti-overflow function, so the anti-siphon overflow device has both anti-siphon and overflow functions.

[0049] In a specific embodiment, reference Figure 8-10 The water outlet 202 and the exhaust port 203 are located at the bottom of the lower seat body 201 and communicate with the interior of the water tank 300. The exhaust port 203 is separated from the water outlet 202 by a rib, the top of which is higher than the bottom surface of the slow flow channel 207. When the water flow is large, the water outlet 202 is blocked by water, and the air in the water tank 300 can be exhausted smoothly through the exhaust port 203. The height of the ribs surrounding the exhaust port 203 is higher than the bottom surface of the water flow, ensuring that water cannot flow into the exhaust port 203 beyond the height of the ribs, thereby affecting normal exhaust. Figure 11-12 , Figure 11 In the exhaust and drainage state without the exhaust port 203, when the water flow from the water inlet 102 is large, it is easy to cause water accumulation at the water outlet 202. The accumulated water will hinder the exhaust of air inside the water tank 300, resulting in water inflow obstruction and affecting water inlet efficiency. In severe cases, the water inlet 102 continues to flow at a high flow rate, but the water tank 300, due to poor exhaust, only flows at a low flow rate. Until the water tank 300 is not full, but the water inside the cavity overflows, causing overflow, resulting in a continuous water inflow and overflow. Figure 12In the exhaust and drainage state with the exhaust port 203, the air in the water tank 300 is smoothly exhausted through the exhaust port 203, and the water smoothly enters the water tank 300 along the water outlet 202, forming separate channels for water and gas to go through respectively without interfering with each other. It can be seen that the design of the exhaust port 203 fully guarantees the smooth water intake and exhaust of the water tank 300.

[0050] refer to Figure 8-10 During normal water inflow, water flows from the water inlet 102 into the cavity and then sequentially through the first flow-guiding structure 104, the second flow-guiding structure 205, and the water outlet 202 into the interior of the water tank 300. The gas flow in the water tank 300 enters the cavity through the exhaust port 203 and is discharged through the overflow port and the vent 103. During normal water inflow, the anti-siphon overflow device fills the water tank 300 with water, and the water in the water tank 300 is discharged normally without overflow. Specifically, water flows into the cavity from the water inlet 102, and the water channel 105 receives the water ejected from the pipe. The water flows out along the water channel 105. The water channel 105 ensures that the water path cannot flow to other places in the cavity. Due to the obstruction of the water retaining rib 107, the water flows into the slow flow fence 206. The slow flow fence 206 cuts and diverts the turbulent water path into multiple small streams, and reduces the flow rate, while also reducing the water inlet noise. The water flow that enters the slow flow fence 206 forms a relatively gentle water flow and flows out along the slow flow channel 207, and then flows out from the water outlet 202 and into the water tank 300.

[0051] refer to Figure 13 The anti-overflow process is as follows: when the water tank 300 overflows and the water level is higher than the overflow port, the water can be discharged from the overflow port. When a system failure or other factors cause the water inlet 102 to continue to inflow, and the water tank 300 cannot discharge water, the water level continues to rise until the water level is higher than the overflow port, and the water above the overflow port flows out from the overflow port. When the water source is under high pressure, the water inlet 102 continues to spray water at high pressure and high speed, and the large-diameter overflow port can effectively overflow and drain water, so that the water can only flow away according to the set overflow path. The first overflow port 204 is set on the top side of the lower seat body 201, which can make the water level rise to a certain height before overflowing.

[0052] refer to Figure 14The anti-siphon process is as follows: when a system failure or other factors cause the overflow port to be blocked or the water to be contaminated, and at this time the water source forms a negative pressure, when the water inlet 102 is sucked back, the vent 103 can effectively replenish air to keep the air pressure inside and outside the cavity consistent, ensuring that no negative pressure is formed in the cavity, and the water in the water tank 300 will not be sucked back into the water inlet 102, thereby polluting the water source. If the space near the water inlet 102 is not protected from air, water droplets may adhere to the surface. When the water inlet 102 is under negative pressure, the water droplets attached nearby may be sucked back into the pipeline. The vent 103 above the cover 101 serves as one of the channels for gas discharge during normal water inlet. When the water source forms a negative pressure, it can absorb external gas into the cavity, so that the air pressure inside and outside the cavity is the same, avoiding the siphon phenomenon, and can meet more demanding water source environments. The anti-siphon function is more powerful and the water inlet is quieter.

[0053] The toilet water system of the present invention includes a water inlet pipe, a water tank 300 and the above-mentioned anti-siphon overflow device. The water inlet pipe is connected to the water inlet 102, and the bottom of the lower seat body 201 is connected to the water tank 300. Figure 15-17 On the smart toilet, the anti-siphon overflow device is integrated into the base module and can be fixed to the base module by bolts or the like.

[0054] refer to Figure 15 The present invention provides a toilet comprising a toilet body and the above-mentioned toilet water system, wherein the toilet water system is mounted on the toilet body. In a smart toilet, the toilet water system is arranged on the toilet base.

[0055] The anti-overflow and siphoning working processes of the toilet of the present invention are as described above and will not be further described here.

[0056] The toilet of the present invention, the parts not involved are the same as those in the prior art or can be implemented by using the prior art.

[0057] Example 2

[0058] refer to Figure 18-19The difference between Example 2 of the present application and Example 1 is that the overflow port also includes a second overflow port 208, a third overflow port 209, and a fourth overflow port 210 located below the first overflow port 204. The first overflow port 204 is a large-diameter overflow port, while the second overflow port 208, the third overflow port 209, and the fourth overflow port 210 are all small-diameter overflow ports. The first overflow port 204 is set on the top side of the lower seat body 201. Due to the position of the first overflow port 204, the position of the toilet base drain port is restricted, which may lead to a limited layout of the toilet base. The provision of other overflow ports below the first overflow port 204 is conducive to a diversified layout of the toilet base. The first overflow port 204 is in a normally open state, while the second overflow port 208, the third overflow port 209, and the fourth overflow port 210 can be selectively opened or closed, and any overflow port can be selected for drainage according to the actual layout of the lower seat 200. Among them, the positions of the second overflow port 208, the third overflow port 209, and the fourth overflow port 210 need to be ensured to be lower than the first overflow port 204, in order to ensure that other overflow ports can overflow first. The drainage flow rate of the second overflow port 208, the third overflow port 209, and the fourth overflow port 210 needs to be greater than the overflow flow rate required by regulations. In scenarios with specific overflow requirements, only the first overflow port 204 can be selected to be opened. In other situations where the first overflow port 204 cannot be used, other overflow ports can be opened and the opened overflow ports can be used for drainage. In one example, the second overflow port 208 can be set on the side wall of the lower seat body 201 above the exhaust port 203. The third overflow port 209 is set on the side wall of the lower seat body 201 around the bottom of the first overflow port 204, and the fourth overflow port 210 is set opposite to the third overflow port 209. In other embodiments, the positions of the second overflow port 208 , the third overflow port 209 , and the fourth overflow port 210 may be adjusted according to the layout of the toilet base and other conditions.

[0059] In a specific embodiment, reference Figure 20-21 During the normal water inflow process, in addition to the first overflow port 204 being able to exhaust, any opened overflow port among the second overflow port 208, the third overflow port 209 and the fourth overflow port 210 can also be used for exhaust.

[0060] Specifically, refer to Figure 22 When overflow occurs in the water tank 300 and only the first overflow port 204 is used for drainage, the corresponding drain port of the toilet base will also be restricted by the position of the first overflow port 204. Figure 23When a second overflow port 208 is provided and opened, the second overflow port 208 is connected to a silicone tube, the other end of which is connected to the drain port of the toilet base. This allows the water tank 300 to continue to receive water even in abnormal situations. Overflowing water from the water tank 300 flows through the second overflow port 208 into the silicone tube, then through the silicone tube, and finally out through the drain port of the toilet base. If the overflow flow from the second overflow port 208 is insufficient to meet the overflow, a third overflow port 209 or a fourth overflow port 210 can be added to ensure that the overflowing water does not overflow from the first overflow port 204 but from other overflow ports. There is no priority order for the second overflow port 208, the third overflow port 209, and the fourth overflow port 210; they can be used in any order that meets the needs of the toilet base layout and employee convenience. This broadens the application scenarios of the toilet base, allowing it to be applied to more types of toilet bases, meeting the requirements of different overflow ports for different toilet bases, and enhancing versatility.

[0061] The above embodiments are only used to further illustrate the technical solutions of the present invention, but the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the technical solutions of the present invention.

Claims

1. An anti-siphon overflow device that can be installed on a toilet tank, characterized by: The water tank comprises an upper cover and a lower seat, wherein the upper cover is mounted on the lower seat and forms a cavity with the interior of the lower seat, the upper cover comprises a cover body, a water inlet, a vent and a first flow guide structure, the first flow guide structure comprises a water guide channel, the water inlet and the vent are both arranged on the cover body, the first flow guide structure is arranged below the cover body, the lower seat comprises a lower seat body, a water outlet, an exhaust port, an overflow port and a second flow guide structure, the water outlet and the exhaust port are arranged at the bottom of the lower seat body and communicate with the interior of the water tank, the second flow guide structure is arranged below the first flow guide structure, and during normal water inlet, water flows from the inlet into the water tank. The water inlet flows into the cavity and passes through the first guide structure, the second guide structure and the water outlet in sequence and flows into the interior of the water tank. The second guide structure includes a slow flow grid and a slow flow channel. The slow flow grid includes a plurality of partitions protruding from the side wall of the lower seat body. The plurality of partitions are arranged at intervals to form a grid structure. The bottom of the grid structure is connected to the slow flow channel, and the end of the slow flow channel is connected to the water outlet. The gas in the water tank enters the cavity through the exhaust port and is discharged through the overflow port and the vent. When the water tank overflows and the water level is higher than the overflow port, the water is discharged from the overflow port.

2. The anti-siphon overflow device according to claim 1, characterized in that: The water diversion channel is arranged below the water inlet, a water diversion surface and an opening are arranged at the bottom of the water diversion channel, and baffles are arranged on both sides of the bottom of the water diversion channel.

3. The anti-siphon overflow device according to claim 2, characterized in that: A connecting plate is provided between the water channel and the cover body, and a recess is provided on the connecting plate facing the water inlet, with a clearance space formed between the recess and the water inlet.

4. The anti-siphon overflow device according to claim 1, characterized in that: A water retaining rib is provided on the opening edge of the water channel extending downwards, and the water retaining rib is used to guide the water in the water channel to the slow flow fence.

5. The anti-siphon overflow device according to claim 1, characterized in that: The bottom of the lower seat is separated into the exhaust port and the water outlet by ribs, and the top of the ribs is higher than the bottom surface of the slow flow channel.

6. The anti-siphon overflow device according to claim 1, characterized in that: The overflow port includes a first overflow port, which is arranged on the side of the top of the lower seat body and keeps a normally open state.

7. The anti-siphon overflow device according to claim 6, characterized in that: The overflow port also includes a second overflow port, a third overflow port and a fourth overflow port located below the first overflow port. The first overflow port is a large-diameter overflow port, and the second overflow port, the third overflow port and the fourth overflow port are all small-diameter overflow ports. The second overflow port, the third overflow port and the fourth overflow port can be selectively opened or closed.

8. The anti-siphon overflow device according to claim 1, characterized in that: The cover body and the lower seat body are connected by snap fastening, and a sealing ring is provided between the bottom of the lower seat body and the water tank.

9. A toilet water system comprising a water inlet pipe, a water tank, and the anti-siphon overflow device according to any one of claims 1 to 8, characterized in that: The water inlet pipeline is connected to the water inlet, and the bottom of the lower seat body is connected to the water tank.

10. A toilet, comprising a toilet body, characterized in that: It also includes the toilet water system according to claim 9, wherein the toilet water system is installed on the toilet body.

Images