A siphon drain valve and toilet

Abstract

The application provides a siphon drainage valve and a closestool. The siphon drainage valve is arranged in a water tank and comprises: a siphon channel, which has a water inlet channel, a water outlet channel, and a drainage port between the water inlet channel and the water outlet channel, the position of the drainage port is lower than the water level in the water tank, the inlet of the water inlet channel is connected with the inner cavity of the water tank and is lower than the water level in the water tank, the outlet of the water outlet channel is connected with the outlet of the water tank or penetrates the outlet of the water tank, the top of the siphon channel is provided with an air exhaust hole, and the air in the siphon channel is exhausted through the air exhaust hole in the process that water in the water tank enters the siphon channel; a valve core assembly, which is movably arranged in the siphon channel to close or open the drainage port; and a driving member, which is used for controlling the valve core assembly to open the drainage port, the air exhaust hole is in a closed state when the drainage port is opened, the water in the water tank is drained to the water outlet channel through the drainage port, and thus the siphon channel forms a siphon. The siphon drainage valve can realize labor-saving opening of the drainage.

Description

Technical Field

[0001] This invention relates to the field of bathroom product technology, and in particular to a siphon drain valve and a toilet. Background Technology

[0002] Currently available siphon drain valves, such as the Chinese utility model patent with patent publication number CN203795555U entitled "A Siphon Drain Valve with Adjustable Siphon Bend Height", disclose a siphon channel formed by the drain pipe 1, siphon bend 2, and water tank 3. When siphon drainage is activated, the lifting rod 32 is pulled upwards, which drives the one-way valve plate 31 to move upwards. The one-way valve plate 31 can squeeze the water in the water tank 3 upwards through the siphon bend 2 and flow into the drain pipe 1, thereby achieving siphoning. This allows the water in the container equipped with the siphon drain valve to be discharged through the siphon channel. Existing siphon drain valves all use valve plates to squeeze water from one side of the siphon channel to the other, thus filling both sides of the siphon channel with water and triggering a siphon (meaning it requires manual water operation). When squeezing water from one side of the siphon channel to the other, there are certain requirements for the water flow rate and velocity; otherwise, the siphon cannot be successfully triggered. Therefore, a large operating force is required to squeeze out a sufficient amount of water and make the water flow have a sufficiently high velocity. This results in a large operating force and a poor user experience.

[0003] Furthermore, low-profile toilets are currently more popular with consumers. However, existing siphon-type drain valves, such as the one disclosed in the aforementioned patent, require a relatively large distance between the one-way valve plate 31 and the top wall of the siphon bend 2 (to ensure sufficient space for storing a sufficient amount of water and for the one-way valve plate 31 to move a sufficient distance to allow a sufficient flow of water from the tank 3 to the drain pipe 1). This results in a large height requirement for the entire siphon-type drain valve, making it unsuitable for use in low-profile toilet tanks. Therefore, it is necessary to improve existing siphon-type drain valves to make them suitable for use in low-profile toilet tanks. Summary of the Invention

[0004] To address the aforementioned problems, one objective of this invention is to provide a siphon-type drain valve that enables effortless opening and drainage.

[0005] The second objective of this invention is to provide a toilet that, while employing a siphon-type drain valve, can achieve a low-profile design.

[0006] This invention is achieved using the following technical solution:

[0007] One of the technical solutions of this invention is:

[0008] A siphon-type drain valve, installed in a water tank, includes:

[0009] A siphon channel has an inlet channel, an outlet channel, and a drain outlet located between the inlet channel and the outlet channel. The drain outlet is positioned below the water level in the water tank. The inlet of the inlet channel is connected to the inner cavity of the water tank and is below the water level in the water tank. The outlet of the outlet channel is connected to the outlet of the water tank, or the outlet of the outlet channel extends out of the outlet of the water tank. The top of the siphon channel is provided with an exhaust hole. During the process of water entering the siphon channel from the water tank, air inside the siphon channel is discharged through the exhaust hole.

[0010] A valve core assembly is movably disposed within the siphon channel to close or open the drain outlet, thereby controlling the on / off state of the siphon channel;

[0011] A drive unit is used to control the valve core assembly to open the drain port. When the drain port is opened, the vent is closed, and the water in the water tank is discharged to the water outlet channel through the drain port, thereby causing the siphon channel to form a siphon.

[0012] Preferably, the siphon channel is lower than the water level in the water tank.

[0013] Preferably, the drive member passes through the vent hole, the inner end of the drive member is located in the siphon channel and connected to the valve core assembly, and the valve core assembly closes the vent hole when it opens the drain port.

[0014] Preferably, the vent is located above the drain outlet, and the valve core assembly moves up and down between the vent and the drain outlet.

[0015] Preferably, the system further includes a siphon shroud and an inner tube. The bottom opening of the siphon shroud opens into the inner cavity of the water tank, and the top of the siphon shroud is provided with the vent hole. The inner tube is disposed inside the siphon shroud, and the top and bottom of the inner tube are respectively provided with openings. There is a gap between the top opening of the inner tube and the top wall of the siphon shroud to form a water storage space. There is a gap between the inner side wall of the siphon shroud and the outer wall of the inner tube. The gap and the water storage space form the water inlet channel. The inner cavity of the inner tube forms the water outlet channel. The bottom opening of the siphon shroud forms the inlet of the water inlet channel. The bottom opening of the inner tube forms the outlet of the water outlet channel. The top opening of the inner tube forms the drain outlet. The valve core assembly is movably disposed in the water storage space. The valve core assembly is driven by the driving member to approach or move away from the drain outlet to close or open the drain outlet.

[0016] Preferably, the top of the inner tube is provided with a connecting part, which is arranged around the outside of the drain outlet. The inner tube and the siphon hood are fixedly connected through the connecting part. The peripheral wall of the connecting part is provided with a hollow part for water to pass through. The lower end face of the inner top wall of the siphon hood is provided with a plurality of first snap-fit ​​parts. The peripheral wall of the connecting part is provided with a number of second snap-fit ​​parts corresponding to the first snap-fit ​​parts. The first snap-fit ​​parts and the second snap-fit ​​parts are snap-fit ​​connected.

[0017] Preferably, it further includes an inverted U-shaped siphon tube, the internal channel of which forms the siphon channel, one end of which is open to form the inlet of the water inlet channel, the other end of which is open to form the outlet of the water outlet channel, and the drain outlet is located on the side of the siphon tube with the outlet of the water outlet channel.

[0018] The second technical solution of the present invention is:

[0019] A toilet includes a seat with a toilet bowl and a water tank disposed at the rear of the seat. The seat is provided with a flushing channel communicating with the water tank and the toilet bowl. A siphon-type drain valve as described in any of the above is installed in the water tank. The drain outlet is connected to the outlet of the water tank. The valve core assembly opens and closes the outlet of the water tank by opening and closing the drain outlet. The outlet of the water outlet channel is connected to the flushing channel.

[0020] Preferably, the bottom of the toilet bowl has a first water seal, the flushing channel includes a washing channel leading to the upper flushing port of the toilet bowl, the flushing channel also includes a pre-storage water channel located upstream of the washing channel, the pre-storage water channel includes an upward section extending upward along the water flow direction, the outlet of the water tank forms the inlet of the pre-storage water channel, in the unflushed state, the pre-storage water channel contains pre-storage water under atmospheric pressure and forms a second water seal, the water surface of the second water seal is above the water surface of the first water seal.

[0021] Preferably, the rising section extends obliquely upward or vertically upward along the water flow direction, the outlet of the rising section forms the outlet of the pre-stored water channel, and the outlet of the water tank is located higher than the outlet of the rising section.

[0022] Preferably, the bottom of the toilet bowl is provided with a lower flushing port located below the water level of the first water seal, and the flushing water channel further includes a spray channel leading to the lower flushing port of the toilet bowl. The outlet of the rising section is connected to the inlet end of the washing channel and the inlet end of the spray channel, respectively. The second water seal is upstream of the first water seal, and in the unflushing state, the water in the second water seal and the water in the first water seal are independent of each other and do not communicate.

[0023] Preferably, point a on the top wall at the inlet of the rising section is lower than point b on the bottom wall at the outlet of the rising section, and the vertical distance between point a and point b is L. In the unflushed state, the water surface of the second water seal is above point a.

[0024] Preferably, the pre-stored water channel further includes a horizontal section and a vertical section, which are sequentially connected along the water flow direction. The vertical section extends upward from the top wall of the horizontal section into the interior of the water tank, and the top opening of the vertical section forms the outlet of the water tank. The water in the vertical section flows downward. The siphon drain valve passes through the vertical section, and the bottom wall of the horizontal section is provided with a second through hole for the siphon drain valve to pass through and be installed. The bottom of the siphon drain valve is locked to the second through hole.

[0025] The siphon-type drain valve and toilet provided by this invention have at least the following technical advantages compared to the prior art:

[0026] 1. This invention comprises a siphon channel, a valve core assembly, and a drive assembly. The siphon channel has an inlet channel, an outlet channel, and a drain outlet located between the inlet and outlet channels. The drain outlet is positioned below the water level in the water tank. The inlet of the inlet channel is connected to the inner cavity of the water tank and is below the water level. The outlet of the outlet channel is connected to the outlet of the water tank, or the outlet of the outlet channel extends beyond the outlet of the water tank. A vent is provided at the top of the siphon channel, allowing air to escape from the siphon channel as water enters. The valve core assembly is movably positioned within the siphon channel to close or open the drain outlet, thereby controlling the siphon flow. The invention controls the opening and closing of the channel; the driving component controls the valve core assembly to open the drain port. When the drain port is opened, the vent is closed, and the water in the tank is discharged through the drain port to the outlet channel, thus creating a siphon in the siphon channel. Compared to existing siphon drain valves that require a valve plate to squeeze water from one side of the siphon channel to the other (i.e., manual water manipulation is required), resulting in a high operating force, this invention only requires the driving component to control the valve core assembly to open the drain port. Once the drain port is open, the water in the tank automatically flows into the outlet channel under its own gravitational potential energy, thus filling the entire siphon channel with water and triggering a siphon. Because this invention does not require squeezing water from one side of the siphon channel to the other, the water in the tank can automatically flow into the outlet channel under its own gravitational potential energy, thus saving effort and providing a better operating feel. Furthermore, this invention has a simple structure and reliable function.

[0027] 2. By using the valve core assembly to simultaneously close the vent when the drain port is opened, there is no need to set up a separate component to close the vent, resulting in a simpler, more compact structure with fewer parts.

[0028] 3. The siphon drain valve includes a siphon cover and an inner tube. The siphon cover and the inner tube cooperate to form a siphon channel. Specifically, there is a gap between the top opening of the inner tube and the top wall of the siphon cover to form a water storage space. There is also a gap between the inner side wall of the siphon cover and the outer wall of the inner tube. The gap and the water storage space form the water inlet channel of the siphon channel, and the inner cavity of the inner tube forms the water outlet channel of the siphon channel. This design is simple and compact.

[0029] 4. The siphon drain valve includes an inverted U-shaped siphon tube. The internal channel of the siphon tube forms a siphon channel. One end of the siphon tube is open to form the inlet of the water inlet channel, and the other end of the siphon tube is open to form the outlet of the water outlet channel. The drain outlet is located on the side of the siphon tube with the outlet of the water outlet channel. This design makes the structure simple and compact.

[0030] The toilet provided by this invention has at least the following technical advantages compared to the prior art:

[0031] 1. The toilet of the present invention has a siphon-type drain valve installed inside its water tank. Because the movement distance of the valve core assembly of the siphon-type drain valve can be designed to be smaller than that of the valve plate in the prior art, the overall height of the siphon-type drain valve can be designed to be lower. Furthermore, due to the use of the siphon principle for drainage, the drain outlet can be designed to be higher, and the lower part of the water tank can be lowered below the drain outlet. The distance from the top wall of the water tank to the drain outlet does not need to be large. Therefore, the water tank can be designed to be more partially recessed into the seat, resulting in less of the water tank protruding from the upper surface of the seat, thus facilitating a lower-profile toilet design. In addition, some standards require the drain outlet to be located above the upper surface of the seat. Using the siphon-type drain valve of the present invention, a lower-profile toilet design can be achieved while meeting this standard requirement.

[0032] 2. The flushing channel of the toilet of the present invention also includes a pre-storage water channel located upstream of the washing channel. The pre-storage water channel includes an upward section extending upward along the water flow direction. The outlet of the water tank forms the inlet of the pre-storage water channel. In the unflushed state, the pre-storage water channel contains pre-storage water under atmospheric pressure and forms a second water seal. During flushing, because there is pre-storage water in the flushing channel, the water flow can quickly flow into the toilet bowl for flushing, resulting in a better flushing effect.

[0033] 3. Since the pre-stored water is maintained under atmospheric pressure, when opening the valve core assembly, it is also necessary to overcome the suction force of the pre-stored water on the valve core assembly. That is, a part of the operating force needs to be offset by the suction force of the pre-stored water. However, since the self-opening force of the siphon drain valve of the present invention is small as described above, even if it is necessary to overcome the suction force of the pre-stored water, the total operating force will not be too large, and a better operating experience can still be maintained.

[0034] 4. The siphon-type drain valve of the present invention, combined with a toilet seat with a pre-stored water channel, allows the entire toilet to simultaneously possess the advantages of better flushing performance, a low-profile design, and lower operating force. Attached Figure Description

[0035] Figure 1 This is a simplified schematic diagram of a siphon drain valve installed in a water tank according to the first embodiment of the present invention (at this time, the valve core assembly of the drain valve is not open to drain the outlet).

[0036] Figure 2 This is a schematic diagram of the state of a siphon-type drain valve core assembly after the drain outlet is opened, when the siphon channel has just formed a siphon. This is a first embodiment of the present invention.

[0037] Figure 3 Is Figure 2 Based on the current state, this is a schematic diagram of the continuous process of siphon drainage.

[0038] Figure 4 yes Figure 3 A magnified view of a portion of point B in the middle.

[0039] Figure 5 This is a schematic diagram of a siphon-type drain valve assembly according to the first embodiment of the present invention.

[0040] Figure 6 This is a cross-sectional schematic diagram of the toilet according to the third embodiment of the present invention when the siphon drain valve is not open.

[0041] Figure 7 This is a cross-sectional schematic diagram of the toilet according to the third embodiment of the present invention when the siphon drain valve is open for drainage.

[0042] Figure 8 This is a top view of the toilet seat according to the third embodiment of the present invention.

[0043] Figure 9 yes Figure 8 A cross-sectional view along the AA direction.

[0044] Figure 10 This is a schematic diagram of the toilet seat and siphon drain valve separated according to the third embodiment of the present invention.

[0045] Reference numerals: 1-Seat body, 11-Toilet bowl, 111-Upper flushing port, 112-Lower flushing port, 12-Water tank, 121-Water tank outlet, 13-Flushing waterway, 131-Washing channel, 132-Pre-stored water channel, 1321-Rising section, 1322-Vertical section, 1323-Horizontal section, 13231-Second through hole, 133-Jet channel; 2-Siphon drain valve, 21-Air seal gasket, 22-Siphon channel, 221-Inlet channel, 222-Outlet channel, 223-Drain outlet, 224-Ventilation hole, 23-Valve core assembly, 24-Drive component, 241-Cut surface, 25-Water stop gasket, 26-Siphon cover, 261-First snap-fit ​​part, 27-Inner tube, 271-Connecting part, 2711-Second snap-fit ​​part; W1-First water seal, W2-Second water seal. Detailed Implementation

[0046] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0047] Please see Figures 1 to 5 A siphon-type drain valve according to a first embodiment of the present invention is disposed in a water tank 12, comprising:

[0048] The siphon channel 22 has an inlet channel 221, an outlet channel 222, and a drain outlet 223 located between the inlet channel 221 and the outlet channel 222. The drain outlet 223 is positioned below the water level of the water tank 12. The inlet of the inlet channel 221 is connected to the inner cavity of the water tank 12 and is positioned below the water level of the water tank 12. The outlet of the outlet channel 22 is connected to the outlet 121 of the water tank 12, or the outlet of the outlet channel 22 extends out of the outlet 121 of the water tank 12. The top of the siphon channel 22 is provided with an exhaust port 224. During the process of water entering the siphon channel 22 from the water tank 21, the air inside the siphon channel 22 is discharged through the exhaust port 224.

[0049] Valve core assembly 23, which is movably disposed within the siphon channel 22 to close or open the drain outlet 223, thereby controlling the opening and closing of the siphon channel 22;

[0050] The driving component 24 is used to control the valve core assembly 23 to open the drain port 223. When the drain port 223 is opened, the vent 224 is closed. The water in the water tank 1 is discharged to the water outlet channel 222 through the drain port 223, thereby causing the siphon channel 22 to form a siphon.

[0051] Compared to existing siphon drain valves that require valve plates to force water from one side of the siphon channel to the other (i.e., manual operation is required), resulting in a high operating force, this invention only requires the drive component 24 to control the valve core assembly 23 to open the drain port 223. Once the drain port 223 is opened, the water in the water tank 1 will automatically flow into the outlet channel 222 under the influence of its own gravitational potential energy, thus filling the entire siphon channel 22 with water and triggering a siphon. Since this invention does not require forcefully squeezing water from one side of the siphon channel to the other, the water in the water tank can automatically flow into the outlet channel under the influence of its own gravitational potential energy, thus requiring less effort and providing a better operating feel.

[0052] Please see Figure 1 Preferably, the siphon channel 22 is lower than the water level in the water tank 12, which is more conducive to the generation of the siphon effect. Of course, the top wall of the siphon channel 22 can also be higher than the water level in the water tank 12, as long as the water in the water tank 12 can fill the siphon channel 22 after the drain outlet 223 is opened.

[0053] Please see Figures 1 to 5 Preferably, the driving member 24 passes through the vent 224, and the inner end of the driving member 24 is located within the siphon channel 22 and connected to the valve core assembly 23. When the valve core assembly 23 opens the drain outlet 223, it closes the vent 224. The vent 224 is located above the drain outlet 223, and the valve core assembly 23 moves up and down between the vent 224 and the drain outlet 223. The vent 224 guides the movement of the driving member 24, and when the valve core assembly 23 opens, it blocks the vent 224, ensuring that the siphon channel 22 can drain water using the siphon effect. Simultaneously, by using the valve core assembly 23 to close the vent 224, there is no need for a separate component to close the vent 224, resulting in a simpler, more compact structure with fewer parts.

[0054] Specifically, the drive component 24 is rod-shaped, and the valve core assembly 23 is disc-shaped. The lower end of the drive component 24 is fixed to the valve core assembly 23. The valve core assembly 23 includes a valve disc, a water-stop pad 25 disposed on the lower surface of the valve disc, and an air-sealing pad 21 disposed on the upper surface of the valve disc. The valve core assembly 23 is sealed to the drain outlet 223 through the water-stop pad 25, and is sealed to the vent hole 224 through the air-sealing pad 21. See details... Figure 5In this embodiment, the driving member 24 is formed by cutting off a portion of a cylindrical rod along the axial direction, forming a cut surface 241. The outer diameter of the rod is designed to match the inner diameter of the vent hole 224, so that the vent hole 224 can guide the sliding of the driving member 24. A ventilation gap is formed between the cut surface 241 of the driving member 24 and the inner wall of the vent hole 224. During the filling process of the water tank 12, the water in the inner cavity of the water tank 12 enters the siphon channel 22, thereby squeezing the air in the siphon channel 22 upward and discharging it from the ventilation gap. In other embodiments, a ventilation groove can be formed along the axial direction on the outer wall of the drive member 24 to form a ventilation gap, or a ventilation groove can be formed on the inner wall of the exhaust hole 224 to form a ventilation gap, or the outer diameter of the drive member 24 can be designed to be smaller than the inner diameter of the exhaust hole 224, so that a ventilation gap is formed between the outer wall of the drive member 24 and the inner wall of the exhaust hole 224. The specific ventilation structure is not limited to this, as long as the air in the siphon channel 22 can be discharged from the exhaust hole 224.

[0055] Please see Figures 1 to 5 Preferably, the system further includes a siphon cover 26 and an inner tube 27. The bottom opening of the siphon cover 26 is open to the inner cavity of the water tank 21, and the top of the siphon cover 26 is provided with the vent 224. The inner tube 27 is disposed inside the siphon cover 26, and the top and bottom of the inner tube 27 are respectively provided with openings. There is a gap between the top opening of the inner tube 27 and the top wall of the siphon cover 26 to form a water storage space. There is a gap between the inner wall of the siphon cover 26 and the outer wall of the inner tube 27. The gap and the water storage space form the water inlet channel 221, and the inner cavity of the inner tube 27 forms the water outlet channel 222. The bottom opening of the siphon cover 26 forms the inlet of the water inlet channel 221, the bottom opening of the inner tube 27 forms the outlet of the water outlet channel 222, and the top opening of the inner tube 27 forms the drain outlet 223. The valve core assembly 23 is movably disposed in the water storage space. The valve core assembly 23 is driven by the driving member 24 to approach or move away from the drain outlet 223 to close or open the drain outlet 223.

[0056] Please see Figures 1 to 5Preferably, the top of the inner tube 27 is provided with a connecting portion 271, which surrounds the outside of the drain outlet 223. The inner tube 27 and the siphon cover 26 are fixedly connected through the connecting portion 271. The peripheral wall of the connecting portion 271 has a hollowed-out portion for water passage. The lower end face of the inner top wall of the siphon cover 26 is provided with multiple first snap-fit ​​portions 261, and the peripheral wall of the connecting portion 271 is provided with a number of second snap-fit ​​portions 2711 corresponding to the first snap-fit ​​portions 261. The first snap-fit ​​portions 261 and the second snap-fit ​​portions 2711 are snap-fit ​​connected. This design facilitates the fixed connection of the siphon cover 26 and the inner tube 27, making assembly more convenient. In addition to snap-fit ​​connection, the first snap-fit ​​portions 261 and the second snap-fit ​​portions 2711 can also be fixedly connected by conventional methods such as threaded connection.

[0057] It should be noted here that... Figures 1 to 5 The diagram only shows a simplified schematic of the main components of the siphon drain valve in this embodiment. Other components not involved in the invention are not shown. For example, the drive unit 24 can also be connected to a lifting rod or lifting rope, which can be used to lift the drive unit 24 upwards. The drive unit 24 can be driven manually or electrically.

[0058] See Figures 1 to 3 ,in, Figure 1 The illustration shows the state where the valve core assembly 23 of this embodiment has not opened the drain port 223. Figure 2 The illustration shows the state of the siphon channel 22 when the siphon is just formed after the valve core assembly 23 opens the drain port 223. Figure 3 The illustration shows Figure 2 Based on the state, the state during the continuous process of siphon drainage.

[0059] A second embodiment of the present invention provides a siphon-type drain valve (not shown), which differs from the first embodiment mainly in the specific structure forming the siphon channel 22. The first embodiment uses a siphon cover 26 and an inner tube 27 to form the siphon channel 22. This embodiment does not use a siphon cover 26 and an inner tube 27; instead, it replaces the siphon cover 26 and inner tube 27 of the first embodiment with an inverted U-shaped siphon tube (not shown). Specifically, the internal channel of the siphon tube forms the siphon channel 22. One end of the siphon tube opens to form the inlet of the water inlet channel 221, and the other end opens to form the outlet of the water outlet channel 222. The drain outlet 223 is located on the side of the siphon tube with the outlet of the water outlet channel 222.

[0060] For the remaining structures not described in this embodiment, please refer to the first embodiment; they will not be repeated here.

[0061] Please see Figures 6 to 10A toilet according to a third embodiment of the present invention includes a seat 1 with a toilet bowl 11 and a water tank 12 disposed at the rear of the seat 1. The seat 1 is also provided with a flushing channel 13 connecting the water tank 12 and the toilet bowl 11. A siphon-type drain valve 2 as described in any of the above claims is installed in the water tank 12. The drain outlet 223 is connected to the outlet 121 of the water tank 12. The valve core assembly 23 opens and closes the outlet 121 of the water tank 12 by opening and closing the drain outlet 223. The outlet of the water outlet channel 222 is connected to the flushing channel 13. The bottom of the toilet bowl 11 has a first water seal W1. Water from the water tank 12 flows to the toilet bowl 11 through the flushing channel 13 to flush the toilet bowl 11.

[0062] Preferably, the specific structure of the base 1 is further designed as follows:

[0063] The flushing channel 13 includes a washing channel 131 leading to the upper flushing port 111 of the toilet bowl 11 and a pre-storage water channel 132 located upstream of the washing channel 131. The pre-storage water channel 132 includes an upward rising section 1321 extending in the direction of water flow. The outlet 121 of the water tank 12 forms the inlet of the pre-storage water channel 132. In the unflushed state, the pre-storage water channel 132 contains pre-storage water under atmospheric pressure and forms a second water seal W2 (e.g., ...). Figure 6 As shown), the water surface of the second water seal W2 is above the water surface of the first water seal W1. The second water seal W2 is upstream of the first water seal W1, and in the unflushed state, the water in the second water seal W2 and the water in the first water seal W1 are independent of each other and not connected.

[0064] Please see Figures 6 to 9 By setting a pre-storage water channel 132 upstream of the washing channel 131 on the flushing water channel 13, the pre-storage water channel 132 has an upwardly extending rising section 1321. In the unflushed state, the pre-storage water channel 132 can pre-store water under atmospheric pressure. In this way, when flushing, since there is already pre-stored water in the pre-storage water channel 132, the water flow can quickly flush the toilet bowl 11, with a greater flushing force and better flushing effect. Furthermore, the pre-storage water channel 132 is located upstream of the washing channel 131. During the flushing process, the water in the pre-storage water channel 132 will enter the washing channel 131 and flow out from the upper flushing port 111 of the toilet bowl 11 to flush the inner wall of the toilet bowl 11. Compared with existing technologies, the present invention does not require a one-way valve to prevent outside air from entering the pre-stored water channel through the washing channel 131. Instead, the pre-stored water channel 132 is designed to be located upstream of the washing channel 131 and has an ascending section 1321. The structure is simpler and the function is more reliable.

[0065] The rising section 1321 can extend upwards at an angle or vertically upwards along the water flow direction. This embodiment specifically adopts an upward angle extension, which is more conducive to water flow and minimizes energy loss in the rising section 1321. The outlet of the rising section 1321 forms the outlet of the pre-stored water channel 132, that is, the pre-stored water channel 132 refers to the channel between the outlet 121 of the water tank 12 and the outlet of the rising section 1321. The position of the outlet 121 of the water tank 12 (i.e., the inlet position of the pre-stored water channel 132) is higher than the position of the outlet of the rising section 1321 (i.e., the outlet position of the pre-stored water channel 132). Under atmospheric pressure, there is a level difference in the pre-stored water within the pre-stored water channel 132; the water level near the outlet of the rising section 1321 is lower than the water level near the outlet 121 of the water tank 12.

[0066] The bottom of the toilet bowl 11 is provided with a lower flushing port 112 located below the water level of the first water seal W1. The flushing water channel 13 also includes a spray channel 133 leading to the lower flushing port 112 of the toilet bowl 11. The outlet of the rising section 1321 is connected to the inlet end of the washing channel 131 and the inlet end of the spray channel 133, respectively. That is, the water flow in the pre-stored water channel 132 is split at the outlet of the pre-stored water channel 132, with one part flowing to the washing channel 131 and the other part flowing to the spray channel 133. The water flow into the washing channel 131 flows to the upper flushing port 111 of the toilet bowl 11 to clean the inner wall of the toilet bowl 11, and the water flow into the spray channel 133 flows to the lower flushing port 112 of the toilet bowl 11 to spray the sewage pipe, causing the sewage pipe to form a siphon.

[0067] Point a on the top wall of the inlet of the rising section 1321 is lower than point b on the bottom wall of the outlet of the rising section 1321, and the vertical distance between points a and b is L (e.g., ...). Figure 7 (As shown). In the unrinsed state, the water surface of the second water seal W2 is above the position at point a.

[0068] The lower part of the water tank 12 is lower than the upper surface of the seat 1, so that the internal space of the seat 1 can be fully utilized. The height of the part of the water tank 12 that protrudes from the upper surface of the seat 1 can be designed to be relatively low, so that the appearance design of the toilet seat 1 can be more flexible.

[0069] The rising section 1321 extends upward at an angle along the direction of water flow, and the angle of inclination of the rising section 1321 to the horizontal plane is between 30° and 80°. Specifically, the angle of inclination of the rising section 1321 to the horizontal plane can be 30°, 40°, 50°, 60°, 70°, 80°, etc.

[0070] The top wall of the rising section 1321 serves as part of the bottom wall of the water tank 12, thus making the internal structure of the seat 1 more compact.

[0071] The pre-stored water channel 132 also includes a horizontal section 1323 and a vertical section 1322. The vertical section 1322, the horizontal section 1323 and the rising section 1321 are sequentially connected along the water flow direction. The vertical section 1322 extends upward from the top wall of the horizontal section 1323 into the interior of the water tank 12. The top opening of the vertical section 1322 forms the outlet 121 of the water tank 12. The water in the vertical section 1322 flows downward.

[0072] In this embodiment, the inner tube 27 of the siphon-type drain valve 2 passes through the vertical section 1322. The bottom wall of the horizontal section 1323 is provided with a second through hole 13231 for the inner tube 27 to pass through and be installed, and the bottom of the inner tube 27 is locked to the second through hole 13231. This design makes the installation and fixing of the inner tube 27 simpler and easier.

[0073] In the unflushed state, because the siphon drain valve 2 is in the closed state of the outlet 121 of the water tank 12, under the action of atmospheric pressure, there is pre-stored water in the vertical section 1322, the horizontal section 1323, and the rising section 1321 (at this time, the liquid level of the pre-stored water in the vertical section 1322 is higher than the liquid level of the pre-stored water in the rising section 1321, and atmospheric pressure maintains this liquid level difference). Therefore, when flushing, less water is needed to fill the pre-stored water channel 132, and the water flow can be transmitted to the toilet bowl 11 more quickly, thus enabling rapid flushing. In addition, a step is provided at the transition between the top of the inner pipe 27 and the connecting part 271. The step is sealed against the top of the vertical section 1322 of the pre-stored water channel by an annular sealing gasket, preventing water in the water tank 1 from entering the pre-stored water channel 132 from the top opening of the vertical section 1322. The step on the inner tube 27 is used to position the inner tube 27 on the vertical section 1322. The siphon cover 26 is then placed over the inner tube 27, thus installing the siphon-type drain valve 2 of the present invention inside the water tank 1. A connecting plate is provided on the lower end of the inner tube 27 of the siphon-type drain valve 2, on the open side (the side opposite to the inclined section of the flushing water channel 13). A connecting pipe is connected to the bottom end of the connecting plate. The connecting pipe passes through the second through hole 13231 and is locked in place with a locking nut, thereby fixing the inner tube 27. Of course, the method of fixing the inner tube 27 is not limited to this; it can also be fixed by a snap-fit ​​method, etc.

[0074] The working process of this invention is as follows:

[0075] Reference Figure 6As shown, at the end of each drainage, the siphon drain valve 2 seals the outlet 121 of the water tank 12, thereby closing the connection between the water tank 12 and the pre-stored water channel 132. At this time, there is negative pressure in the pre-stored water channel 132. Therefore, under the action of atmospheric pressure, there is pre-stored water in the pre-stored water channel 132, and the pre-stored water forms a water seal, namely the second water seal W2.

[0076] Reference Figure 7 As shown, when flushing, the drive component 24 of the siphon drain valve 2 is activated, thereby causing the valve core assembly 23 to open the outlet 121 of the water tank 12. At this time, water from the water tank 12 enters the pre-storage water channel 132. Since there is already water in the pre-storage water channel 132, the water can flow rapidly in two directions: one to the jet channel 133 and out of the lower flushing port 112 of the toilet bowl, and the other to the washing channel 131 and out of the upper flushing port 111 of the toilet bowl. The directions of the two water flows can be specifically referred to... Figure 7 The arrows indicate the direction of flushing. After flushing, the siphon drain valve 2 reseals the outlet 121 of the water tank 12, and the pre-stored water in the pre-stored water channel 132 is re-stored, restoring the original state. Figure 6 The state shown.

[0077] Several points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.

[0078] Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.

[0079] Finally, the above description is only a preferred embodiment of the present invention, and the scope of protection of the present invention is not limited to the above embodiments. All technical solutions that fall within the scope of the present invention are within the scope of protection of the present invention.

[0080] It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of this invention should also be considered within the scope of protection of this invention.

Claims

1. A siphon-type drain valve, installed in a water tank, characterized in that: include: A siphon channel has an inlet channel, an outlet channel, and a drain outlet located between the inlet channel and the outlet channel. The drain outlet is positioned below the water level in the water tank. The inlet of the inlet channel is connected to the inner cavity of the water tank and is below the water level in the water tank. The outlet of the outlet channel is connected to the outlet of the water tank, or the outlet of the outlet channel extends out of the outlet of the water tank. The top of the siphon channel is provided with an exhaust hole. During the process of water entering the siphon channel from the water tank, air inside the siphon channel is discharged through the exhaust hole. A valve core assembly is movably disposed within the siphon channel to close or open the drain outlet, thereby controlling the on / off state of the siphon channel; A driving component is used to control the valve core assembly to open the drain port. When the drain port is opened, the vent is closed, and the water in the water tank is discharged to the water outlet channel through the drain port, thereby causing the siphon channel to form a siphon. The siphon channel is lower than the water level in the water tank.

2. The siphon-type drain valve according to claim 1, characterized in that: The drive component passes through the vent hole, and the inner end of the drive component is located in the siphon channel and connected to the valve core assembly. When the valve core assembly opens the drain port, it closes the vent hole.

3. A siphon-type drain valve according to claim 2, characterized in that: The vent is located above the drain outlet, and the valve core assembly moves up and down between the vent and the drain outlet.

4. A siphon-type drain valve according to claim 1, characterized in that: It also includes a siphon shroud and an inner tube. The bottom opening of the siphon shroud opens into the inner cavity of the water tank, and the top of the siphon shroud is provided with the vent hole. The inner tube is disposed inside the siphon shroud, and the top and bottom of the inner tube are respectively provided with openings. There is a gap between the top opening of the inner tube and the top wall of the siphon shroud to form a water storage space. There is a gap between the inner side wall of the siphon shroud and the outer wall of the inner tube. The gap and the water storage space form the water inlet channel. The inner cavity of the inner tube forms the water outlet channel. The bottom opening of the siphon shroud forms the inlet of the water inlet channel. The bottom opening of the inner tube forms the outlet of the water outlet channel. The top opening of the inner tube forms the drain outlet. The valve core assembly is movably disposed in the water storage space. The valve core assembly is driven by the driving member to approach or move away from the drain outlet to close or open the drain outlet.

5. A siphon-type drain valve according to claim 4, characterized in that: The inner tube is provided with a connecting part at the top, which surrounds the outside of the drain outlet. The inner tube and the siphon hood are fixedly connected through the connecting part. The peripheral wall of the connecting part is provided with a hollow part for water to pass through. The lower end face of the inner top wall of the siphon hood is provided with a plurality of first snap-fit ​​parts. The peripheral wall of the connecting part is provided with a number of second snap-fit ​​parts corresponding to the first snap-fit ​​parts. The first snap-fit ​​parts and the second snap-fit ​​parts are snap-fit ​​connected.

6. A siphon-type drain valve according to claim 1, characterized in that: It also includes an inverted U-shaped siphon tube, the internal channel of which forms the siphon channel, one end of which is open to form the inlet of the water inlet channel, and the other end of which is open to form the outlet of the water outlet channel. The drain outlet is located on the side of the siphon tube with the outlet of the water outlet channel.

7. A toilet, comprising a seat with a commode and a water tank disposed at the rear of the seat, wherein the seat is provided with a flushing channel communicating with the water tank and the commode, characterized in that: The water tank is equipped with a siphon-type drain valve as described in any one of claims 1-6, the drain outlet is connected to the outlet of the water tank, the valve core assembly opens and closes the outlet of the water tank by opening and closing the drain outlet, and the outlet of the water outlet channel is connected to the flushing water channel.

8. A toilet according to claim 7, characterized in that: The bottom of the toilet bowl has a first water seal. The flushing channel includes a washing channel leading to the upper flushing port of the toilet bowl. The flushing channel also includes a pre-storage water channel located upstream of the washing channel. The pre-storage water channel includes an upward section extending upward along the water flow direction. The outlet of the water tank forms the inlet of the pre-storage water channel. In the unflushed state, the pre-storage water channel contains pre-storage water under atmospheric pressure and forms a second water seal. The water surface of the second water seal is above the water surface of the first water seal.

9. A toilet according to claim 8, characterized in that: The rising section extends upward at an angle or vertically upward along the direction of water flow, and the outlet of the rising section forms the outlet of the pre-stored water channel. The outlet of the water tank is located higher than the outlet of the rising section.

10. A toilet according to claim 9, characterized in that: The bottom of the toilet bowl is provided with a lower flushing port located below the water level of the first water seal. The flushing water channel also includes a spray channel leading to the lower flushing port of the toilet bowl. The outlet of the rising section is connected to the inlet end of the washing channel and the inlet end of the spray channel, respectively. The second water seal is upstream of the first water seal, and in the unflushed state, the water in the second water seal and the water in the first water seal are independent of each other and do not communicate.

11. A toilet according to claim 8, characterized in that: Point a on the top wall at the inlet of the rising section is lower than point b on the bottom wall at the outlet of the rising section. The vertical distance between points a and b is L. In the unflushed state, the water surface of the second water seal is above point a.

12. A toilet according to claim 8, characterized in that: The pre-stored water channel further includes a horizontal section and a vertical section. The vertical section, horizontal section, and rising section are sequentially connected along the water flow direction. The vertical section extends upward from the top wall of the horizontal section into the interior of the water tank. The top opening of the vertical section forms the outlet of the water tank, and the water in the vertical section flows downward. The siphon drain valve passes through the vertical section. The bottom wall of the horizontal section is provided with a second through hole for the siphon drain valve to pass through and install. The bottom of the siphon drain valve is locked to the second through hole.

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