Water-saving closestool device

Abstract

The utility model provides a water-saving closestool device, which comprises a closestool seat body provided with a urinal, a blow-off pipeline and a flushing water outlet, the blow-off pipeline is communicated with the bottom of the urinal and forms an upper trap, a lower trap is formed on the blow-off pipeline and is positioned at the downstream of the upper trap, and the flushing water outlet is communicated with the lower trap. An inner cavity of the blow-off pipeline between the upper trap and the lower trap forms an airtight cavity; the water tank is mounted at the rear part of the toilet seat body; the water inlet device is used for supplying water to the water tank; the pump is used for pumping water in the water tank to the flushing water outlet; the negative pressure cover is arranged in the water tank, an inner cavity of the negative pressure cover is defined by the top wall and the peripheral wall of the negative pressure cover, a bottom end opening communicated with the inner cavity of the negative pressure cover is formed in the bottom end of the negative pressure cover, water in the water tank enters and exits the negative pressure cover through the opening, and a negative pressure cavity is defined by the top wall and the peripheral wall of the negative pressure cover and the water surface in the negative pressure cover; one end of the negative-pressure communicating pipe is communicated with the negative-pressure cavity, and the other end of the negative-pressure communicating pipe is communicated with the airtight cavity. The utility model has a simple and reliable structure, can effectively reduce the cost of the pump, and saves water.

Description

Technical Field

[0001] The utility model relates to the technical field of toilets, in particular to a water-saving toilet device. Background Art

[0002] At present, some toilet devices on the market use a water pump to extract water from a water tank to flush the toilet bowl. The water pump works on the water in the extracted water tank to generate a high-speed water flow and a high water pressure. The high-speed water flow pushes the water and waste in the toilet bowl to cross the highest point of the sewage pipe through thrust, thereby generating a siphon in the sewage pipe, and then draining the water and waste in the toilet bowl. However, this pump flushing system that relies solely on the thrust of the water flow requires a large water flow speed and water flow rate to generate a siphon in the sewage pipe of the toilet, and requires a water pump with a large power and a large flow rate, resulting in a high cost of the pump flushing system and insufficient water saving.

[0003] In view of this, it is necessary to develop a more water-saving and low-cost toilet device. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a water-saving toilet device, which can effectively reduce the power and flow of the pump, thereby reducing the cost of the pump, and achieve water saving to a certain extent, and has a simple and reliable structure.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A water-saving toilet device, comprising:

[0007] The toilet seat body comprises a toilet bowl, a sewage pipe and a flushing water outlet for supplying water to the toilet bowl, wherein the sewage pipe is connected to the bottom of the toilet bowl and forms an upper water trap, a lower water trap is formed on the sewage pipe downstream of the upper water trap, and an inner cavity of the sewage pipe between the upper water trap and the lower water trap forms an airtight cavity;

[0008] A water tank, mounted at the rear of the toilet seat;

[0009] A water inlet device, used for supplying water to the water tank;

[0010] A pump, used to pump water in the water tank to the flushing water outlet;

[0011] A negative pressure cover is placed in the water tank, the negative pressure cover has a top wall and a peripheral wall, the top wall and the peripheral wall enclose an inner cavity of the negative pressure cover, the bottom end of the negative pressure cover forms a bottom opening communicated with the inner cavity of the negative pressure cover, the water in the water tank enters and exits the negative pressure cover through the bottom opening, and the top wall, the peripheral wall and the water surface in the negative pressure cover enclose a negative pressure cavity;

[0012] A negative pressure connecting pipe has one end connected to the negative pressure chamber and the other end connected to the airtight chamber.

[0013] As a preferred embodiment, the airtight chamber, the negative pressure connecting pipe, and the negative pressure chamber together constitute a sealed connecting body, and positive pressure is formed in the sealed connecting body after the water tank is filled with water to a predetermined water level (here, positive pressure means that the air pressure in the sealed connecting body is greater than the atmospheric pressure).

[0014] As a preferred embodiment, the pressure difference between the positive pressure and the atmospheric pressure is the pressure corresponding to 12-18 mm water column.

[0015] As a preferred embodiment, the pressure difference between the positive pressure and the atmospheric pressure is the pressure corresponding to 15 mm water column, and the volume of the airtight cavity is greater than 500 mmL.

[0016] As a preferred embodiment, when the pump draws water from the water tank to flush the toilet, the volume of water descending in the negative pressure hood is less than or equal to the volume of gas in the sewage pipe when the toilet is not flushed.

[0017] As a preferred embodiment, the inner cavity of the water tank includes a high-level area and a low-level area, the bottom wall of the water tank corresponding to the high-level area is higher than the bottom wall of the water tank corresponding to the low-level area, a partition is provided between the high-level area and the low-level area, the negative pressure hood is installed at the high-level area, the pump is installed at the bottom of the low-level area, the bottom opening of the negative pressure hood is located below the top of the partition and is spaced from the bottom wall of the water tank corresponding to the high-level area, the top of the partition defines the water storage level of the high-level area, and the bottom opening of the negative pressure hood is air-sealed by the water storage formed by the partition.

[0018] As a preferred embodiment, the water inlet device is installed in the low-position area, and when water is inletted, the water flows from the low-position area to the high-position area.

[0019] As a preferred embodiment, the negative pressure connecting pipe includes a first pipe section and a second pipe section, the first pipe section is integrally formed on the side wall of the sewage pipe and is connected to the airtight cavity, the second pipe section is fixedly penetrated through the bottom wall of the water tank, the bottom end opening of the second pipe section is sealedly connected to the end opening of the first pipe section away from the airtight cavity, and the top end opening of the second pipe section is located in the negative pressure cavity and is higher than the water surface in the negative pressure cavity.

[0020] As a preferred embodiment, the second pipe section of the negative pressure connecting pipe is integrally formed with the water tank.

[0021] As a preferred embodiment, a sunken accommodating chamber is provided at the rear of the toilet seat body, and the sewage pipe is provided with an ascending section, a turning section and a descending section in sequence along the water flow direction from the inlet of the sewage pipe, the turning section is located in the accommodating chamber, and the top wall of the turning section is provided with a through hole connected to the negative pressure connecting pipe, and the water tank is embedded in the accommodating chamber.

[0022] Compared with the prior art, the beneficial effects of the utility model are:

[0023] 1. The utility model provides a negative pressure hood and a negative pressure connecting pipe. The negative pressure hood is placed in a water tank. The top wall, the peripheral wall and the water surface in the negative pressure hood form a negative pressure chamber. One end of the negative pressure connecting pipe is connected to the negative pressure chamber, and the other end is connected to an airtight chamber formed by the inner cavity of the sewage pipe between the upper water trap and the lower water trap. In this way, when the pump draws water from the water tank to flush the toilet bowl, negative pressure will be formed in the negative pressure chamber. The negative pressure acts on the airtight chamber through the negative pressure connecting pipe, so that the sewage pipe can be effectively siphoned in time under the action of negative pressure, and the siphon effect is better, thereby effectively reducing the power and flow of the pump, reducing the cost of the pump, and achieving water saving to a certain extent. The structure is simple and reliable.

[0024] 2. The airtight cavity, the negative pressure connecting pipe and the negative pressure cavity together form a sealed connecting body. After the water tank is filled with water to a predetermined water level, positive pressure is formed in the sealed connecting body, which will increase the liquid level of the upper water trap on one side of the toilet bowl (i.e., the water seal level of the toilet bowl), thereby increasing the water storage surface area in the toilet bowl, which is beneficial to the generation of siphon in the sewage pipe during flushing to a certain extent. Among them, when the pressure difference between the positive pressure and the atmospheric pressure is selected to be a pressure corresponding to a 12-18mm water column, it is more beneficial to the generation of siphon.

[0025] 3. When the pump draws water from the water tank to flush the toilet, the volume of water that descends in the negative pressure hood is less than or equal to the volume of gas in the sewage pipe when the toilet is not flushed. This can effectively prevent the sewage in the sewage pipe from entering the negative pressure connecting pipe and the negative pressure hood, ensuring the hygiene of the product and the simple and reliable structure.

[0026] 4. By dividing the inner cavity of the water tank into a high-level area and a low-level area, a partition is provided between the high-level area and the low-level area, the bottom opening of the negative pressure hood is located below the top of the partition and is separated from the bottom wall of the water tank corresponding to the high-level area, and the top of the partition defines the water level of the high-level area. The water storage formed by the partition is used to air-seal the bottom opening of the negative pressure hood. In this way, the partition can be used to control the descending height of the water level in the negative pressure chamber (that is, each time the toilet is flushed, the water level in the negative pressure chamber will not continue to descend after it drops to a predetermined height), thereby ensuring that the volume of water descending in the negative pressure hood is less than or equal to the volume of gas in the sewage pipe when the toilet bowl is not flushed, thereby achieving the purpose of preventing sewage in the sewage pipe from entering the negative pressure connecting pipe and the negative pressure hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0028] in:

[0029] Figure 1 This is a schematic diagram of the overall three-dimensional assembly of a water-saving toilet device provided by an embodiment of the utility model;

[0030] Figure 2 It is a schematic diagram of the overall three-dimensional assembly of a water-saving toilet device provided by an embodiment of the utility model after the negative pressure cover is hidden;

[0031] Figure 3 It is an overall three-dimensional exploded view of a water-saving toilet device provided by an embodiment of the utility model;

[0032] Figure 4 It is a partial three-dimensional schematic diagram of an embodiment of the utility model;

[0033] Figure 5 This is one of the cross-sectional views of a water-saving toilet device provided by one embodiment of the utility model;

[0034] Figure 6 This is the second cross-sectional view of the water-saving toilet device provided by one embodiment of the utility model;

[0035] Figure 7 This is a schematic diagram of the state of the water-saving toilet device provided by an embodiment of the utility model in an initial unflushed state (in the figure, the horizontal bar represents water, and the dots represent air);

[0036] Figure 8 It is a schematic diagram of the state of a water-saving toilet device provided by an embodiment of the utility model during the flushing process.

[0037] The accompanying drawings in the figure are as follows:

[0038] 10-toilet seat; 11-urinal; 12-sewage pipe; 121-upper water trap; 122-lower water trap; 123-airtight chamber; 124-rising section; 125-turning section; 1251-through hole; 126-descending section; 13-flushing water outlet; 14-accommodating chamber;

[0039] 20-water tank; 21-high area; 22-low area; 23-partition; 231-top of the partition; 24-flow gap;

[0040] 30-water inlet device;

[0041] 40- pump;

[0042] 50-negative pressure cover; 51-top wall; 52-peripheral wall; 53-bottom opening; 54-negative pressure chamber;

[0043] 60-negative pressure connecting pipe; 61-first pipe section; 62-second pipe section; 63-sealing sleeve;

[0044] 70- water supply pipe;

[0045] C- The water level in the negative pressure hood after flushing. DETAILED DESCRIPTION

[0046] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0047] See also Figures 1 to 8 The utility model provides a water-saving toilet device in a preferred embodiment, including a toilet seat body 10, a water tank 20, a water inlet device 30, a pump 40, a negative pressure cover 50 and a negative pressure connecting pipe 60 and other components.

[0048] The toilet seat 10 has a toilet bowl 11, a sewage pipe 12 and a flushing water outlet 13 for supplying water to the toilet bowl 11. The sewage pipe 12 is connected to the bottom of the toilet bowl 11 and forms an upper water trap 121. A lower water trap 122 is formed on the sewage pipe 12 downstream of the upper water trap 121. The inner cavity of the sewage pipe 12 between the upper water trap 121 and the lower water trap 122 forms an airtight cavity 123.

[0049] The water tank 20 is mounted at the rear of the toilet seat 10;

[0050] The water inlet device 30 is used to supply water to the water tank 20. The water inlet device 30 can adopt an existing known structure, which will not be described in detail here.

[0051] The pump 40 is used to pump water in the water tank 20 to the flushing water outlet 13, and then the water flows out from the flushing water outlet 13 to flush the toilet bowl 11; the pump 40 can adopt an existing known structure as long as it can pump water.

[0052] The negative pressure cover 50 is placed in the water tank 20. The negative pressure cover 50 has a top wall 51 and a peripheral wall 52. The top wall 51 and the peripheral wall 52 enclose the inner cavity of the negative pressure cover 50. The bottom end of the negative pressure cover 50 forms a bottom opening 53 that communicates with the inner cavity of the negative pressure cover 50. The water in the water tank 20 enters and exits the negative pressure cover 50 through the bottom opening 53. Specifically, when the water inlet device 30 fills the water tank 20 with water, the water flowing into the water tank 20 enters the negative pressure cover 50 through the bottom opening 53. When the pump 40 sucks the water in the water tank 20, the water level in the water tank 20 gradually decreases with the suction of the pump 40, and the water in the negative pressure cover 50 flows out through the bottom opening 53. The top wall 51, the peripheral wall 52 of the negative pressure cover 50 and the water surface in the negative pressure cover 50 enclose a negative pressure cavity 54.

[0053] One end of the negative pressure connecting pipe 60 is connected to the negative pressure chamber 54, and the other end is connected to the airtight chamber 123. In this way, the negative pressure chamber 54 is connected to the airtight chamber 123 through the negative pressure connecting pipe 60. When the pump 40 draws water from the water tank 20 to flush the toilet bowl 11, negative pressure will be formed in the negative pressure chamber 54, and the negative pressure acts on the airtight chamber 123 through the negative pressure connecting pipe 60, so that the sewage pipe 12 can be effectively promoted to form a siphon in time under the action of negative pressure, and the siphon effect is better, thereby effectively reducing the power and flow of the pump 40, reducing the cost of the pump 40, and achieving water saving to a certain extent, and the structure is simple and reliable.

[0054] In this embodiment, the airtight cavity 123, the negative pressure connecting pipe 60, and the negative pressure cavity 54 together form a sealed connecting body, which is isolated from the outside air. After the water tank 20 is filled with water to a predetermined water level, a positive pressure is formed in the sealed connecting body (i.e., the air pressure in the sealed connecting body is greater than the atmospheric pressure), which will increase the liquid level of the upper water trap 121 on one side of the toilet bowl 11 (i.e., the water seal level of the toilet bowl 11), thereby increasing the water storage surface area in the toilet bowl 11, which is beneficial to the generation of siphoning of the sewage pipe 12 during flushing to a certain extent. Figure 7 Under the action of positive pressure, the liquid level difference between the liquid level on the side of the upper water trap 121 located in the toilet bowl 11 and the liquid level on the side of the upper water trap 121 located in the airtight chamber 123 is A1, and at the same time, the liquid level difference between the liquid level on the side of the lower water trap 122 away from the airtight chamber 123 and the liquid level on the side of the lower water trap 122 located in the airtight chamber 123 is A2, and the liquid level difference between the liquid level in the water tank 20 outside the negative pressure cover 50 and the liquid level in the negative pressure cover 50 is A3, A1=A2=A3. Preferably, the pressure difference between the positive pressure and the atmospheric pressure is the pressure corresponding to a 12-18mm water column, that is, A1=A2=A3=12-18mm. More preferably, the pressure difference between the positive pressure and the atmospheric pressure is the pressure corresponding to a 15mm water column, that is, A1=A2=A3=15mm, and the volume of the airtight chamber 123 is greater than 500mmL. Such a design is more conducive to the generation of siphon.

[0055] In this embodiment, when the pump 40 draws water from the water tank 20 to flush the toilet bowl 11, the volume of water that descends in the negative pressure cover 50 is less than or equal to the volume of gas in the sewage pipe 12 when the toilet bowl 11 is not flushed. This can effectively prevent the sewage in the sewage pipe 12 from entering the negative pressure connecting pipe 60 and the negative pressure cover 50, ensuring the sanitation of the product, and the structure is simple and reliable.

[0056] In order to ensure that the volume of water dropped in the negative pressure cover 50 during each flushing is less than or equal to the volume of gas in the sewage pipe 12 when the toilet bowl 11 is not flushed, the present embodiment adopts the following structure: the inner cavity of the water tank 20 is divided into a high-position area 21 and a low-position area 22, and the bottom wall of the water tank corresponding to the high-position area 21 is higher than the bottom wall of the water tank corresponding to the low-position area 22; a partition 23 is provided between the high-position area 21 and the low-position area 22 (see Figure 2 , Figure 3 and Figure 6 ), the negative pressure hood 50 is installed in the high-level area 21, the pump 40 is installed at the bottom of the low-level area 22, the bottom opening 53 of the negative pressure hood 50 is located below the top 231 of the partition 23 and is spaced from the bottom wall of the water tank corresponding to the high-level area 21 to form a flow gap 24, and the negative pressure hood 50 is connected to the inner cavity fluid of the water tank 20 through the flow gap 24. The top 231 of the partition 23 defines the water level of the high-level area 21, and the bottom opening 53 of the negative pressure hood 50 is air-sealed by the water storage formed by the partition 23. In this way, the falling height of the water level in the negative pressure chamber 54 can be controlled by the partition 23 (that is, each time flushing, the water level in the negative pressure chamber 54 will not continue to drop after it drops to a predetermined height, and the predetermined height is not lower than the height of the top 231 of the partition 23. For this embodiment, the predetermined height is referred to Figure 8 The height position indicated by the mark C in the figure) can ensure that the volume of water descending in the negative pressure hood 50 is less than or equal to the volume of gas in the sewage pipe 12 when the toilet bowl 11 is not flushed, thereby preventing the sewage in the sewage pipe 12 from entering the negative pressure connecting pipe 60 and the negative pressure hood 50.

[0057] In this embodiment, the water inlet device 30 is installed in the low-level area 22 , and when water is inletted, the water flows from the low-level area 22 to the high-level area 21 .

[0058] For the convenience of assembly, in this embodiment, the negative pressure connecting pipe 60 includes a first pipe section 61 and a second pipe section 62. The first pipe section 61 is integrally formed on the side wall of the sewage pipe 12 and is connected to the airtight cavity 123. The second pipe section 62 is fixedly penetrated through the bottom wall of the water tank 20. The bottom end opening of the second pipe section 62 is sealed and connected to the end opening of the first pipe section 61 away from the airtight cavity 123. The top end opening of the second pipe section 62 is located in the negative pressure cavity 54 and is higher than the water surface in the negative pressure cavity 54. During assembly, just plug and connect the first pipe section 61 and the second pipe section 62 accordingly.

[0059] In this embodiment, the second pipe section 62 of the negative pressure connecting pipe 60 is formed integrally with the water tank 20. The negative pressure connecting pipe 60 further includes a sealing sleeve 63 for sealing the connection between the first pipe section 61 and the second pipe section 62.

[0060] In this embodiment, a sinking accommodating chamber 14 is provided at the rear of the toilet seat body 10, and the sewage pipe 12 is provided with an ascending section 124, a turning section 125 and a descending section 126 in sequence along the water flow direction from the inlet of the sewage pipe 12, the turning section 125 is located in the accommodating chamber 14, and the top wall of the turning section 125 is provided with a through hole 1251 connected to the negative pressure connecting pipe 60, and the water tank 20 is embedded in the accommodating chamber 14. The negative pressure cover 50 is fixedly connected to the water tank 20 by a plurality of screws.

[0061] The working principle of this embodiment is briefly described as follows:

[0062] See also Figure 7 At this time, it is the initial non-flushing state, that is, the pump 40 is not turned on to extract water from the water tank 20. In this state, the upper water trap 121 and the lower water trap 122 respectively have water stored after the last flushing. The water stored in the upper water trap 121 and the lower water trap 122 isolates the airtight cavity 123 in the sewage pipe 12 from the outside air. The airtight cavity 123, the negative pressure connecting pipe 60, and the negative pressure cavity 54 together constitute a sealed connecting body isolated from the outside air. At this time, the water tank 20 is full of working water. Before this, during the water intake process of the water tank 20, the water flowing into the water tank 20 enters the negative pressure hood 50 through the flow gap 24, and the water flow squeezes the air in the negative pressure hood 50 into the airtight chamber 123. After the water tank 20 stops taking in water, an air storage space is formed at the top of the negative pressure hood 50. The water level in the negative pressure hood 50 will not exceed the top opening position of the negative pressure connecting pipe 60 in the negative pressure hood 50. The air pressure in the sealed connecting body formed by the airtight chamber 123, the negative pressure connecting pipe 60, and the negative pressure chamber 54 is a positive pressure.

[0063] See also Figure 8At this time, the pump 40 is turned on to draw the water in the water tank 20 to the flushing water outlet 13 through the water supply pipe 70 to flush the toilet 11. At the same time, in the process of the water level outside the negative pressure cover 50 in the water tank 20 falling, the water flow inside the negative pressure cover 50 flows out through the flow gap 24, which will cause the air pressure in the sealed connecting body composed of the airtight cavity 123, the negative pressure connecting pipe 60, and the negative pressure cavity 54 to drop to a vacuum negative pressure state. Under the action of negative pressure, it can effectively promote the timely formation of siphon in the sewage pipe 12, and the siphon effect is better, thereby effectively reducing the power and flow of the pump, reducing the cost of the pump, and achieving water saving to a certain extent, with a simple and reliable structure. During the flushing process, since the volume of the water falling in the negative pressure cover 50 is less than or equal to the gas volume in the sewage pipe 12 when the toilet 11 is not flushed, the sewage in the sewage pipe 12 will not enter the negative pressure connecting pipe 60 and the negative pressure cover 50, ensuring the hygiene of the product.

[0064] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A water-saving toilet device, characterized in that: include: The toilet seat body comprises a toilet bowl, a sewage pipe and a flushing water outlet for supplying water to the toilet bowl, wherein the sewage pipe is connected to the bottom of the toilet bowl and forms an upper water trap, a lower water trap is formed on the sewage pipe downstream of the upper water trap, and an inner cavity of the sewage pipe between the upper water trap and the lower water trap forms an airtight cavity; A water tank, mounted at the rear of the toilet seat; A water inlet device, used for supplying water to the water tank; A pump, used to pump water in the water tank to the flushing water outlet; A negative pressure cover is placed in the water tank, the negative pressure cover has a top wall and a peripheral wall, the top wall and the peripheral wall enclose an inner cavity of the negative pressure cover, the bottom end of the negative pressure cover forms a bottom opening communicated with the inner cavity of the negative pressure cover, the water in the water tank enters and exits the negative pressure cover through the bottom opening, and the top wall, the peripheral wall and the water surface in the negative pressure cover enclose a negative pressure cavity; A negative pressure connecting pipe has one end connected to the negative pressure chamber and the other end connected to the airtight chamber.

2. The water-saving toilet device according to claim 1, characterized in that: The airtight cavity, the negative pressure connecting pipe and the negative pressure cavity together form a sealed connecting body, and positive pressure is formed in the sealed connecting body after the water tank is filled with water to a predetermined water level.

3. The water-saving toilet device according to claim 2, characterized in that: The pressure difference between the positive pressure and the atmospheric pressure is the pressure corresponding to 12-18 mm water column.

4. The water-saving toilet device according to claim 3, characterized in that: The pressure difference between the positive pressure and the atmospheric pressure is the pressure corresponding to 15 mm water column, and the volume of the airtight cavity is greater than 500 mmL.

5. The water-saving toilet device according to claim 2, characterized in that: During the process of the pump extracting water from the water tank to flush the toilet, the volume of water descending in the negative pressure hood is less than or equal to the volume of gas in the sewage pipe when the toilet is not flushed.

6. The water-saving toilet device according to claim 5, characterized in that: The inner cavity of the water tank includes a high-position area and a low-position area, the bottom wall of the water tank corresponding to the high-position area is higher than the bottom wall of the water tank corresponding to the low-position area, a partition is provided between the high-position area and the low-position area, the negative pressure hood is installed at the high-position area, the pump is installed at the bottom of the low-position area, the bottom opening of the negative pressure hood is located below the top of the partition and is spaced apart from the bottom wall of the water tank corresponding to the high-position area, the top of the partition defines the water storage level of the high-position area, and the bottom opening of the negative pressure hood is air-sealed by the water storage formed by the partition.

7. The water-saving toilet device according to claim 6, characterized in that: The water inlet device is installed in the low-position area, and when water is inletted, the water flows from the low-position area to the high-position area.

8. The water-saving toilet device according to claim 1, characterized in that: The negative pressure connecting pipe includes a first pipe section and a second pipe section. The first pipe section is integrally formed on the side wall of the sewage pipe and is connected to the airtight cavity. The second pipe section is fixedly penetrated through the bottom wall of the water tank. The bottom end opening of the second pipe section is sealedly connected to the end opening of the first pipe section away from the airtight cavity. The top end opening of the second pipe section is located in the negative pressure cavity and is higher than the water surface in the negative pressure cavity.

9. The water-saving toilet device according to claim 8, characterized in that: The second pipe section of the negative pressure connecting pipe is integrally formed with the water tank.

10. The water-saving toilet device according to claim 1, characterized in that: A sunken accommodating chamber is provided at the rear of the toilet seat body, and the sewage pipe is provided with an ascending section, a turning section and a descending section in sequence along the water flow direction from the inlet of the sewage pipe. The turning section is located in the accommodating chamber, and the top wall of the turning section is provided with a through hole connected to the negative pressure connecting pipe, and the water tank is embedded in the accommodating chamber.

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