A water-saving toilet

Abstract

The invention discloses a water-saving toilet, comprising a toilet body, a toilet bowl and a water tank are arranged on the toilet body, a sinking bay is arranged at the bottom of the toilet bowl, and a sewage siphon is connected to the sinking bay. A water guide cavity is provided at the bottom of the toilet body below the water tank, and a drainage valve installation hole is provided at the bottom of the water tank. A scrubbing pipe for cleaning the surrounding wall is arranged at the top of the toilet bowl, a scrubbing water guide pipe is connected to one side of the scrubbing pipe, the scrubbing water guide pipe is arranged in the water guide cavity, and the pipe mouth of the scrubbing water guide pipe is arranged just below the drainage valve installation hole. A jetting pipe for cleaning the sinking bay is arranged at the bottom of the toilet bowl, and the outer wall surface of the scrubbing water guide pipe and the inner wall surface of the water guide cavity are enclosed to form a jetting water guide pipe, and the upper end of the jetting pipe is connected to the jetting water guide pipe. The invention separates the water of the jetting pipe and the scrubbing pipe through the water guide cavity, and can more reasonably distribute the flushing water to the jetting pipe and the scrubbing pipe of the toilet, so as to achieve the best flushing effect without wasting water.

Description

Technical Field

[0001] The invention relates to the field of sanitary ware, and in particular to a water-saving toilet. Background Art

[0002] Existing toilets such as Figure 1 As shown, after the drain valve is opened, the water in the water tank first flows into the common secondary water channel 1000, and then flows into the brush ring water pipeline 1001 and the jet water pipeline 1002. Since the common secondary water channel 1000 is common, the water volume cannot be reasonably distributed to the brush ring water pipeline 1001 and the jet water pipeline 1002 of the toilet. The "water volume ratio" of the brush ring water pipeline 1001 and the jet water pipeline 1002 varies with the working water level of the toilet water tank, which easily causes the "brush ring water" or "siphon water" of the toilet to exceed the toilet flushing demand and waste water.

[0003] At the same time, when the existing toilet is in a normal water-stopping state, the outside air is connected to the drain port of the drain valve base through the overflow pipe. When overflow occurs, water flows from the overflow pipe to the drain port of the valve base and enters the toilet pipe. In normal use, since the drain port of the valve base is connected to the outside air through the overflow pipe channel, when the drain valve drains water, negative pressure will be generated in the drain channel. Under the action of the external atmospheric pressure, air will be mixed into the drain port of the valve base, so that the drain channel is not in a full pipe water state, thereby reducing the drainage speed and weakening the flushing effect. Summary of the invention

[0004] In view of the above problems, an object of the present invention is to provide a water-saving toilet which can reasonably distribute flushing water and has a good flushing effect.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A water-saving toilet comprises a toilet body, wherein a toilet bowl and a water tank are provided on the toilet body, a sinking bay is provided at the bottom of the toilet bowl, and a sewage siphon is connected to the sinking bay. A water guide cavity is provided at the bottom of the toilet body below the water tank, and a drainage valve installation hole for communicating with the water guide cavity is provided at the bottom of the water tank. A brushing pipe for cleaning the surrounding wall of the toilet bowl is provided at the top of the toilet bowl, and a brushing water guide pipe is connected to one side of the brushing pipe. The brushing water guide pipe is provided in the water guide cavity, and the pipe mouth of the brushing water guide pipe is provided directly below the drainage valve installation hole. A jetting pipe for cleaning the sinking bay is provided at the bottom of the toilet bowl, and the outer wall surface of the brushing water guide pipe and the inner wall surface of the water guide cavity are combined to form a jetting water guide pipe, and the upper end of the jetting pipe is connected to the jetting water guide pipe.

[0007] In one embodiment, the brushing pipe is an annular pipe with closed sides, the annular pipe is connected to the brushing water pipe on the side close to the water tank, and a plurality of flushing holes facing the peripheral wall of the toilet bowl are evenly distributed along the circumferential direction at the bottom of the annular pipe.

[0008] In another embodiment, the scrubbing pipeline is an annular water diversion groove with an opening on the side, and the annular water diversion groove is connected to the scrubbing water conduit on the side close to the water tank.

[0009] Wherein, a first water delivery pipeline and a second water delivery pipeline are respectively provided on both sides of the scrubbing water pipe, one end of the first water delivery pipeline is connected to the scrubbing water pipe, and the other end is provided with a first rotary jet port connected to the annular water diversion groove. One end of the second water delivery pipeline is connected to the scrubbing water pipe, and the other end is provided with a second rotary jet port connected to the annular water diversion groove.

[0010] Preferably, in order to achieve a better scrubbing effect, the directions of the first rotary jet port and the second rotary jet port are the same as the flow direction of flushing water in the annular water diversion trough.

[0011] Furthermore, a jet port is provided at the bottom of the toilet bowl at a position opposite to the outlet of the sewage siphon pipe, and the bottom end of the jet pipe is connected to the jet port.

[0012] Furthermore, it also includes a drain valve, the bottom of which is provided with a drain channel, and the side wall of which is provided with a water hole for connecting the water tank and the drain channel. The interior of the drain channel is divided into a first drain channel and a second drain channel which are independent of each other by a partition. The bottom of the drain valve is fixedly mounted on the drain valve mounting hole and the first drain channel and the second drain channel are connected to the brushing water pipe and the spraying water pipe respectively.

[0013] The separator is an isolation base, the first drainage channel is arranged inside the isolation base and passes through the isolation base from top to bottom, and the outer wall of the isolation base and the inner wall of the drainage channel are enclosed to form the second drainage channel. The bottom of the isolation base extends downward and is sealed and connected to the nozzle of the brush water pipe through an isolation sealing pad.

[0014] Furthermore, the drain valve includes a valve base, a valve body fixedly mounted on the valve base, and a linkage mechanism arranged inside the valve body and used to drive the drain valve to open or close, the linkage mechanism includes an inner sleeve arranged at the central axis of the valve body, a sealing assembly fixed at the bottom of the inner sleeve and used to seal and close the drainage channel, and a button driving assembly used to drive the sealing assembly to move upward to open the drainage channel.

[0015] In one embodiment, an annular step is provided on the inner wall surface of the drainage channel, and the sealing assembly includes an upper clamping plate, a valve body sealing pad, and a lower clamping plate arranged in sequence from top to bottom. The bottom of the valve body sealing pad is respectively sealed with the upper surface of the annular step and the top of the isolation base. The valve body sealing pad, the lower clamping plate, the isolation base, the isolation sealing pad, and the injection pipe form a closed space.

[0016] In another embodiment, an annular step is provided on the inner wall surface of the drainage channel, and the sealing assembly includes an upper clamping plate, a valve body sealing rubber pad, a pipe sealing rubber pad and a lower clamping plate arranged in sequence from top to bottom. The bottom of the valve body sealing rubber pad is sealed with the upper surface of the annular step, and the bottom of the pipe sealing rubber pad is sealed with the top of the isolation base. The pipe sealing rubber pad, the lower clamping plate, the isolation base, the isolation sealing rubber pad and the injection pipe are enclosed to form a closed space.

[0017] Furthermore, an overflow pipe is fixedly installed on the side of the valve base, an overflow channel connected to the drainage channel is opened inside the overflow pipe, an overflow device for isolating external air is installed on the top of the overflow pipe, and an overflow cap for preventing the generation of vortexes is provided at the water inlet of the overflow device.

[0018] The present invention has the following beneficial effects:

[0019] 1. By separating the water in the jet pipe and the scrubbing pipe through the water guide cavity, the flushing water can be more reasonably distributed to the jet pipe and the scrubbing pipe of the toilet, achieving the best flushing effect without wasting water.

[0020] 2. The water in the water tank flows out through the first drainage channel and the second drainage channel of the valve base, and flows into the scrubbing pipe and the jetting pipe respectively. By controlling the area ratio of the cross section of the first drainage channel and the cross section of the second drainage channel, the water volume can be reasonably distributed to the scrubbing pipe and the jetting pipe of the toilet, thereby saving water while ensuring the flushing effect.

[0021] 3. After installing the drain valve, when the drain valve is closed, the pipe sealing pad / valve body sealing pad, lower card plate, isolation base, isolation sealing pad and scrubbing water pipe in the drain valve are enclosed to form a closed space, which isolates the scrubbing pipe from being connected to the outside air through the overflow pipe. Therefore, when the drain valve is draining, since the air pressure in the familiar pipe is lower than the air pressure in the outside air, some water will be stored in the scrubbing pipe after each flushing. When the bottom of the toilet is flushed next time, the pre-stored water in the scrubbing pipe can be directly used to transfer the potential energy of the water, greatly improving the flushing effect.

[0022] 4. The scrubbing pipe and the jetting pipe do not have a common secondary water channel. The two are independent of each other, isolating the jetting pipe from being connected to the outside air through the scrubbing pipe.

[0023] 5. The overflow device installed on the top of the overflow pipe isolates the jet pipe from being connected to the outside air through the overflow pipe. Therefore, when the drain valve drains water, since the air pressure in the jet pipe is lower than the outside air pressure, there will be water in the jet pipe after each flush. When the bottom of the toilet is flushed next time, the pre-stored water in the jet pipe can directly act on the siphon pipe, saving the water stroke and greatly improving the flushing effect.

[0024] 6. Install an overflow cap on the top of the water inlet pipe. When overflow occurs, the overflow cap prevents the formation of vortex above the water inlet pipe mouth, effectively reduces the noise made by water replenishment, and the water flow tends to be stable with a higher water flow velocity, thereby improving the overflow capacity of the overflow device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a toilet in the prior art.

[0026] Figure 2 Schematic diagram of the internal structure of the water-saving toilet in Example 1.

[0027] Figure 3 for Figure 2 Schematic diagram of the cross section along the AA direction.

[0028] Figure 4 This is a schematic diagram of the principle of the water-saving toilet in Example 1 when the drain valve is closed.

[0029] Figure 5 This is a schematic diagram of the principle of the water-saving toilet in Example 1 when the drain valve is open.

[0030] Figure 6 This is a schematic diagram of the structure of the water-saving toilet in Example 1 after installing one of the drain valves.

[0031] Figure 7 for Figure 6 A partial enlarged schematic diagram of part A.

[0032] Figure 8 This is a schematic diagram of the structure of the water-saving toilet of Example 1 after installing another type of drain valve.

[0033] Fig. 9 for Figure 8 A partial enlarged schematic diagram of part B.

[0034] Fig.10 Schematic diagram of the structure of the valve base.

[0035] Fig.11 for Fig.10 Schematic diagram of the cross section along direction BB.

[0036] Fig.12 It is a schematic diagram of the structure of the overflow device.

[0037] Fig.13 It is a schematic diagram of the structure of the overflow cap.

[0038] Fig.14 It is a schematic diagram of the three-dimensional structure of the water-saving toilet of the second embodiment.

[0039] Fig.15 This is a schematic diagram of the internal structure of the water-saving toilet of Example 2.

[0040] Fig.16 for Fig.15 Schematic diagram of the cross section along the CC direction.

[0041] Fig.17 This is a schematic diagram of the principle of the water-saving toilet of Example 2 when the drain valve is closed.

[0042] Fig.18 This is a schematic diagram of the principle of the water-saving toilet of Example 2 when the drain valve is open.

[0043] Main component symbol description: 1000, common secondary water channel; 1001, brush ring water supply pipeline; 1002, jet water supply pipeline; 1, toilet body; 10, water guide chamber; 101, brush pipe; 102, brush water guide pipe; 1021, first water guide pipe; 1022, second water guide pipe; 1023, first rotary jet port; 1024, second rotary jet port; 103, jet pipe; 104, jet port; 105, jet water guide pipe; 106, flushing hole; 11, toilet bowl; 111, sinking bay; 112, sewage siphon; 12, water tank; 120, drain valve installation hole; 2, drain valve; 20, drainage channel; 200, water hole; 201, first drainage channel; 202, second drainage channel; 203, confined space; 204, first Water flow section; 205, second water flow section; 206, annular step; 21, valve base; 22, valve body; 23, isolation base; 230, isolation sealing pad; 241, inner sleeve; 242, upper clamping plate; 243, valve body sealing pad; 244, pipe sealing pad; 245, lower clamping plate; 25, overflow pipe; 250, overflow pipe; 3, overflow device; 300, water seal area; 301, water inlet pipe; 302, drain pipe; 31, outer shell; 310, cavity; 321, valve stem; 322, valve sleeve; 323, elastomer; 324, support plate; 325, annular water baffle; 4, overflow cap; 40, overflow channel; 41, main body; 410, water inlet hole; 42, water baffle; 420, water supply pipe; 43, diversion part; 430, diversion arc surface. DETAILED DESCRIPTION

[0044] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0045] Embodiment 1

[0046] like Figure 2-13 As shown, a water-saving toilet comprises a toilet body 1, on which a toilet bowl 11 and a water tank 12 are arranged, a sinking bay 111 is arranged at the bottom of the toilet bowl 11, and a sewage siphon 112 is connected to the sinking bay 111. A water guide cavity 10 is provided in the toilet body 1 below the water tank 12, a drain valve installation hole 120 for communicating with the water guide cavity 10 is provided at the bottom of the water tank 12, and a drain valve 2 is installed on the drain valve installation hole 120.

[0047] A scrubbing pipe 101 for cleaning the surrounding wall of the toilet bowl 11 is provided on the top of the scrubbing pipe 101, and a scrubbing water pipe 102 is connected to one side of the scrubbing pipe 101. The scrubbing water pipe 102 is provided in the water guiding cavity 10, and the pipe mouth of the scrubbing water pipe 102 is provided just below the drain valve installation hole 120. The scrubbing pipe 101 is a ring pipe with closed sides, and the side of the ring pipe close to the water tank 12 is connected to the scrubbing water pipe 102, and a plurality of flushing holes 106 facing the surrounding wall of the toilet bowl 11 are evenly distributed along the circumferential direction at the bottom of the ring pipe. A jet pipe 103 for cleaning the sink bay 111 is provided at the bottom of the toilet bowl 11. A jet port 104 is provided at the bottom of the toilet bowl 11 at a position opposite to the outlet of the sewage siphon 112. The bottom end of the jet pipe 103 is connected to the jet port 104. The outer wall surface of the brushing water pipe 102 and the inner wall surface of the water guide cavity 10 are combined to form a jet water pipe 105. The upper end of the jet pipe 103 is connected to the jet water pipe 105.

[0048] The drain valve 2 includes a valve base 21, a valve body 22 fixedly mounted on the valve base 21, and a linkage mechanism disposed inside the valve body 22 and used to drive the drain valve 2 to open or close. A drain channel 20 is disposed inside the valve base 21, and a water hole 200 for connecting the water tank 12 and the drain channel 20 is provided on the side wall of the drain valve 2. The inside of the drain channel 20 is divided into a first drain channel 201 and a second drain channel 202 that are independent of each other by an isolation base 23. The first drain channel 201 is disposed inside the isolation base 23 and passes through the isolation base 23 from top to bottom, and the outer wall of the isolation base 23 and the inner wall of the drain channel 20 are enclosed to form the second drain channel 202. The bottom of the isolation base 23 extends downward and is sealed and connected to the pipe mouth of the scrubbing water pipe 102 through an isolation sealing rubber pad 230. The bottom of the valve base 21 is fixedly mounted on the drain valve mounting hole 120 and enables the first drain channel 201 and the second drain channel 202 to be connected to the scrubbing water pipe 102 and the spraying water pipe 105, respectively.

[0049] The linkage mechanism includes an inner sleeve 241 disposed at the center axis of the valve body 22, a sealing assembly fixed at the bottom of the inner sleeve 241 and used to seal and close the drainage channel 20, and a button driving assembly used to drive the sealing assembly to move upward to open the drainage channel 20. An annular step 206 is provided on the inner wall surface of the drainage channel 20.

[0050] like Figure 6 , Figure 7As shown, in one structure of the sealing assembly, the sealing assembly includes an upper clamping plate 242, a valve body sealing pad 243, a pipe sealing pad 244 and a lower clamping plate 245 arranged in sequence from top to bottom. The bottom of the valve body sealing pad 243 is sealed with the upper surface of the annular step 206, and the bottom of the pipe sealing pad 244 is sealed with the top of the isolation base 23. The pipe sealing pad 244, the lower clamping plate 245, the isolation base 23, the isolation sealing pad 230 and the brushing water pipe 102 are surrounded to form a closed space 203.

[0051] like Figure 8 , Fig. 9 As shown in the figure, in another structure of the sealing assembly, the sealing assembly includes an upper clamping plate 242, a valve body sealing pad 243 and a lower clamping plate 245 arranged in sequence from top to bottom. The bottom of the valve body sealing pad 243 is respectively sealed with the upper surface of the annular step 206 and the top of the isolation base 23. The valve body sealing pad 243, the lower clamping plate 245, the isolation base 23, the isolation sealing pad 230 and the brushing water pipe 102 form a closed space 203.

[0052] An overflow pipe 25 is fixedly installed on the side of the valve base 21, and an overflow pipe 250 connected to the drainage channel 20 is provided inside the overflow pipe 25. An overflow device 3 for isolating the external air is installed on the top of the overflow pipe 25. The overflow device 3 includes a shell 31 and a check valve arranged inside the shell 31, a cavity 310 is arranged inside the shell 31, a water inlet pipe 301 for connecting the water tank 12 and the cavity 310 is fixedly arranged on the top of the shell 31, and a drain pipe 302 for connecting the cavity 310 and the overflow pipe 250 is arranged at the bottom of the shell 31.

[0053] The check valve includes a valve stem 321, a valve sleeve 322, an elastic body 323, a support plate 324 and an annular water baffle 325. The valve sleeve 322 is fixed at the lower part of the cavity 310. The bottom of the valve stem 321 is installed in the valve sleeve 322 and can move up and down. The support plate 324 is fixed on the top of the valve stem 321. The elastic body 323 is sleeved on the outside of the valve stem 321 and presses against the support plate 324 upward. The elastic body 323 is a metal spring or a rubber spring. The annular water baffle 325 is fixed on the top of the support plate 324. The top of the annular water baffle 325 is provided with an overflow port. The annular water baffle 325 and the support plate 324 enclose a water seal area 300. The bottom end of the water inlet pipe 301 extends into the water seal area 300. The bottom surface of the water inlet pipe 301 is sealed and fitted with the upper surface of the support plate 324.

[0054] An overflow cap 4 is installed on the top of the water inlet pipe 301. The overflow cap 4 includes a main body 41. An overflow channel 40 is provided inside the main body 41 and runs through from top to bottom. A water retaining portion 42 is fixedly provided at the upper end of the inner wall of the overflow channel 40 for blocking the water inlet end of the overflow channel 40. A plurality of water inlet holes 410 connected to the drainage end of the overflow channel 40 are provided on the side wall of the main body 41. The bottom of the water retaining portion 42 extends downward to form a guide portion 43. The outer wall surface of the guide portion 43 is provided with a guide arc surface 430 at a position opposite to the water inlet hole 410. A water replenishment pipe 420 for inserting a water replenishment pipe is provided in the water retaining portion 42. The water replenishment pipe 420 runs through the water retaining portion 42 and the guide portion 43 from top to bottom.

[0055] When the water-saving drain valve is opened, the water in the water tank 12 flows out through the first drain channel 201 and the second drain channel 202. The water in the first drain channel 201 enters the scrubbing pipe 101 through the scrubbing water pipe 102, and finally sprays out from the plurality of flushing holes 106 to clean the surrounding wall of the toilet bowl 11. The water in the second drain channel 202 enters the jetting pipe 103 through the jetting water pipe 105, and finally sprays out from the jetting port 104 to clean the sinking bay 111. By controlling the area ratio of the first water flow section 204 and the second water flow section 205, the water volume is reasonably distributed to the scrubbing pipe 101 and the jetting pipe 103 of the toilet, so that the toilet can achieve the best flushing effect without wasting water.

[0056] When the drain valve is closed, the isolation base 23, the isolation sealing pad 230, the lower clamping plate 245, the pipe sealing pad 244 and the scrubbing water pipe 102 form a closed space 203, isolating the scrubbing pipe 101 from being connected to the outside air through the overflow pipe 25. Therefore, when the drain valve 2 is draining, since the air pressure in the scrubbing pipe 101 is lower than the air pressure in the outside air, some water will be stored in the scrubbing pipe 101 after each flushing. When the surrounding wall of the toilet bowl 11 is flushed next time, the pre-stored water in the scrubbing pipe 101 can directly act on the potential energy of the transferred water, which can greatly improve the flushing effect.

[0057] The overflow device 3 isolates the jet pipe 103 from the outside air through the overflow pipe 25. Therefore, when the drain valve 2 drains water, since the air pressure in the jet pipe 103 is lower than the outside air pressure, water will remain in the jet pipe 103 after each flush. When the bottom of the toilet is flushed next time, the pre-stored water in the jet pipe 103 can directly act on the siphon pipe 112, saving the water stroke and greatly improving the flushing effect.

[0058] Embodiment 2

[0059] like Figure 14-18As shown, the difference between this embodiment and the first embodiment is that the scrubbing pipe 101 is an annular water diversion groove with an opening on the side, and the annular water diversion groove is connected to the scrubbing water guide pipe 102 on the side close to the water tank 12. The first water delivery pipe 1021 and the second water delivery pipe 1022 are respectively provided on both sides of the scrubbing water guide pipe 102, one end of the first water delivery pipe 1021 is connected to the scrubbing water guide pipe 102, and the other end is provided with a first rotary jet port 1023 connected to the annular water diversion groove. One end of the second water delivery pipe 1022 is connected to the scrubbing water guide pipe 102, and the other end is provided with a second rotary jet port 1024 connected to the annular water diversion groove. The directions of the first rotary jet port 1023 and the second rotary jet port 1024 are the same as the flow direction of the flushing water in the annular water diversion groove. The rest of the structure of this embodiment is the same as that of the first embodiment.

[0060] When the water-saving drain valve is opened, the water in the water tank 12 flows out through the first drain channel 201 and the second drain channel 202, and the water in the first drain channel 201 enters the scrubbing water pipe 102. The water in the scrubbing water pipe 102 flows through the first water delivery pipe 1021 and the second water delivery pipe 1022 respectively and is finally sprayed out from the first rotary jet port 1023 and the second rotary jet port 1024. The sprayed water is drained through the annular water diversion groove to clean the surrounding wall of the toilet bowl 11. The directions of the first rotary jet port 1023 and the second rotary jet port 1024 are the same as the flow direction of the flushing water of the annular water diversion groove. The water flushed out from both sides follows the same direction of the water flow, and the surrounding wall of the toilet bowl 11 is "spirally" flushed, with a good flushing effect. The principles of the rest of this embodiment are the same as those of the first embodiment.

[0061] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes in form and details may be made to the present invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A water-saving toilet, comprising a toilet body, wherein a toilet bowl and a water tank are arranged on the toilet body, a sinking bay is arranged at the bottom of the toilet bowl, and a sewage siphon is connected to the sinking bay, characterized in that: The toilet body is provided with a water guide cavity below the water tank, a drain valve installation hole for communicating with the water guide cavity is provided at the bottom of the water tank, a scrubbing pipe for cleaning the peripheral wall of the toilet bowl is provided at the top, a scrubbing water guide pipe is connected to one side of the scrubbing pipe, the scrubbing water guide pipe is provided in the water guide cavity, the pipe mouth of the scrubbing water guide pipe is provided just below the drain valve installation hole, a jetting pipe for cleaning the sinking bay is provided at the bottom of the toilet bowl, the outer wall surface of the scrubbing water guide pipe and the inner wall surface of the water guide cavity are surrounded to form a jetting water guide pipe, and the upper end of the jetting pipe is connected to the jetting water guide pipe; Also included is a drain valve, which includes a valve base, a valve body fixedly mounted on the valve base, and a linkage mechanism disposed inside the valve body and used to drive the drain valve to open or close; The bottom of the drain valve is provided with a drain channel, and a water hole for connecting the water tank and the drain channel is opened on the side wall of the drain valve. The interior of the drain channel is divided into a first drain channel and a second drain channel that are independent of each other by a separator. The bottom of the drain valve is fixedly mounted on the drain valve mounting hole so that the first drain channel and the second drain channel are connected to the brushing water pipe and the jetting water pipe respectively. The separator is an isolation base, the first drainage channel is arranged inside the isolation base and passes through the isolation base from top to bottom, the outer wall of the isolation base and the inner wall of the drainage channel are enclosed to form the second drainage channel, the bottom of the isolation base extends downward and is sealed and connected to the pipe opening of the brush water pipe through an isolation sealing pad; An overflow pipe is fixedly installed on the side of the valve base, an overflow channel connected to the drainage channel is opened inside the overflow pipe, an overflow device for isolating external air is installed on the top of the overflow pipe, and an overflow cap for preventing vortex generation is provided at the water inlet of the overflow device; The overflow device includes a shell and a check valve arranged inside the shell, the inside of the shell is provided with a cavity, the top of the shell is fixedly provided with a water inlet pipe for connecting the water tank and the cavity, and the bottom of the shell is provided with a drain pipe for connecting the cavity and the overflow pipe; the check valve includes a valve stem, a valve sleeve, an elastomer, a support plate and an annular water baffle plate, the valve sleeve is fixed at the bottom of the cavity, the bottom of the valve stem is installed in the valve sleeve and can move up and down; the support plate is fixed to the top of the valve stem, the elastomer is sleeved on the outside of the valve stem and presses upward against the support plate, and the elastomer is a metal spring or a rubber spring; the annular water baffle plate is fixed on the top of the support plate, the top of the annular water baffle plate is provided with an overflow port, a water seal area is formed between the annular water baffle plate and the support plate, the bottom end of the water inlet pipe extends into the water seal area, and the bottom surface of the water inlet pipe is sealed and fitted with the upper surface of the support plate.

2. A water-saving toilet according to claim 1, characterized in that: The brushing pipe is a ring-shaped pipe with closed sides. The side of the ring-shaped pipe close to the water tank is connected to the brushing water pipe. The bottom of the ring-shaped pipe is evenly distributed along the circumference with a plurality of flushing holes facing the peripheral wall of the toilet bowl.

3. A water-saving toilet according to claim 1, characterized in that: The scrubbing pipeline is an annular water diversion groove with an opening on the side, and the annular water diversion groove is connected with the scrubbing water guide pipe on the side close to the water tank.

4. A water-saving toilet according to claim 3, characterized in that: A first water supply pipe and a second water supply pipe are respectively provided on both sides of the scrubbing water pipe. One end of the first water supply pipe is connected to the scrubbing water pipe, and the other end is provided with a first rotary jet port connected to the annular water diversion groove. One end of the second water supply pipe is connected to the scrubbing water pipe, and the other end is provided with a second rotary jet port connected to the annular water diversion groove.

5. A water-saving toilet according to claim 4, characterized in that: The directions of the first rotary jet port and the second rotary jet port are both the same as the flow direction of flushing water in the annular water diversion trough.

6. A water-saving toilet according to claim 1, characterized in that: The bottom of the toilet bowl is provided with a jet port at a position opposite to the pipe opening of the sewage siphon pipe, and the bottom end of the jet pipe is connected to the jet port.

7. The water-saving toilet according to claim 1, characterized in that: The linkage mechanism comprises an inner sleeve arranged at the central axis of the valve body, a sealing component fixed at the bottom of the inner sleeve and used to seal and close the drainage channel, and a button driving component used to drive the sealing component to move upward to open the drainage channel.

8. A water-saving toilet according to claim 7, characterized in that: An annular step is provided on the inner wall surface of the drainage channel, and the sealing assembly includes an upper clamping plate, a valve body sealing pad and a lower clamping plate arranged in sequence from top to bottom, and the bottom of the valve body sealing pad is respectively sealed with the upper surface of the annular step and the top of the isolation base, and a closed space is formed between the valve body sealing pad, the lower clamping plate, the isolation base, the isolation sealing pad and the injection pipe.

9. A water-saving toilet according to claim 7, characterized in that: An annular step is provided on the inner wall surface of the drainage channel, and the sealing assembly includes an upper clamping plate, a valve body sealing pad, a pipe sealing pad and a lower clamping plate which are arranged in sequence from top to bottom. The bottom of the valve body sealing pad is sealed with the upper surface of the annular step, and the bottom of the pipe sealing pad is sealed with the top of the isolation base. The pipe sealing pad, the lower clamping plate, the isolation base, the isolation sealing pad and the injection pipe are enclosed to form a closed space.

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