A negative pressure water saving toilet for home

Abstract

The application discloses a negative pressure water-saving closestool for a family, relates to the technical field of negative pressure closestools, and comprises a closestool body, an induction seat ring provided with an opening is fixedly installed on the closestool body, a closestool inner container with a top opening is fixedly assembled in the closestool body, a negative pressure bin is arranged in the closestool body and kept away from the periphery of the closestool inner container, a gas-water separation bin is further arranged in the closestool body, the gas-water separation bin is connected with the closestool inner container and the negative pressure bin through pipelines, a vacuum pump is fixedly assembled on the side of the inner cavity of the closestool body, away from the closestool inner container, the vacuum pump is connected with the pipeline of the negative pressure bin, and a gravity self-flow valve is assembled at a drain hole in a matched mode. In use, the negative pressure bin, the gas-water separation bin and the vacuum pump are arranged in the closestool body in an integrated mode, negative pressure integrated hidden installation is realized, the appearance of the whole machine is consistent with that of a common closestool, and the closestool does not need to occupy the space of a bathroom additionally.

Description

Technical Field

[0001] This invention relates to the field of negative pressure toilet technology, and more specifically to a negative pressure water-saving toilet for home use. Background Technology

[0002] Negative pressure vacuum toilets rely on negative pressure adsorption to discharge waste. Due to their water-saving advantages, they are widely used in special scenarios such as trains, ships, and large public toilets. They rely on external negative pressure tanks, vacuum pumps, and other supporting equipment to complete the flushing and sewage discharge operations.

[0003] Negative pressure toilets differ from traditional toilets that rely on gravity to flush waste. They primarily use the pressure difference created by negative pressure to absorb waste and complete the flushing process. A complete negative pressure toilet system includes the toilet body, vacuum pump, negative pressure tank, and connecting pipes. It creates a negative pressure environment and uses air pressure suction to remove waste from the toilet bowl. Therefore, existing complete negative pressure toilet systems have the negative pressure tank, vacuum pump, and other components located on the outside of the toilet body, resulting in a larger size and footprint. Currently, they are used in public places with ample space. However, the bathrooms in existing residential buildings are often too small, so the large footprint of complete negative pressure toilet systems cannot be installed or used in residential bathrooms. Furthermore, the discharge port diameter of existing negative pressure toilets is relatively small, relying entirely on negative pressure to suction all sewage and waste, making it impossible to empty washing wastewater, mopping wastewater, and other miscellaneous water. Wastewater mixed with debris can easily clog the pipes and air-water tank, affecting normal use. Summary of the Invention

[0004] In view of the problems existing in the prior art, the present invention is proposed.

[0005] Therefore, the purpose of this invention is to provide a negative pressure water-saving toilet for home use. The problem to be solved is that traditional full-set negative pressure toilets are too bulky to be used in the bathrooms of residential buildings; existing negative pressure toilets have small sewage outlet diameters, and full negative pressure suction is prone to frequent pipe blockage due to the dumping of water from washing and mopping.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a negative pressure water-saving toilet for home use, comprising a toilet body, a sensor seat ring with an opening fixedly installed on the toilet body, a toilet liner with a top opening fixedly installed inside the toilet body, a negative pressure chamber disposed inside the toilet body and around the toilet liner, and an air-water separation chamber also disposed inside the toilet body, the air-water separation chamber being connected to the toilet liner and the negative pressure chamber respectively through pipelines, and a vacuum pump fixedly installed on the side of the toilet body cavity away from the toilet liner, the vacuum pump being connected to the negative pressure chamber pipeline; The negative pressure chamber is arranged around the inner liner of the toilet. The bottom of the toilet body has a drain hole corresponding to the air-water separation chamber. The lower end of the air-water separation chamber is connected to the drain hole. A gravity self-flow valve is installed at the drain hole.

[0007] As a preferred embodiment of the negative pressure water-saving toilet for home use described in this invention, a drain pipe is fixedly installed on the inlet of the air-water separation chamber, and a return water bend is provided at one end of the drain pipe extending out of the air-water separation chamber. The return water bend is used to connect to the drain outlet of the toilet liner. The drain pipe and the return water bend together form a return water bend water seal pipeline connecting the toilet liner and the air-water separation chamber.

[0008] As a preferred embodiment of the negative pressure water-saving toilet for home use described in this invention, wherein: the air vent of the air-water separation chamber is fixedly connected to a negative pressure pipe, and the end of the negative pressure pipe is connected to the negative pressure chamber; a flushing solenoid valve is installed between the negative pressure pipe and the negative pressure chamber; the flushing solenoid valve is equipped with a negative pressure sensor for real-time monitoring of the air pressure inside the negative pressure chamber; and the flushing solenoid valve is electrically connected to a vacuum pump.

[0009] As a preferred embodiment of the negative pressure water-saving toilet for home use described in this invention, wherein: a drain seat is fixedly installed at the lower end of the air-water separation chamber, and the drain seat is matched with the drain hole; the gravity self-flow valve is fixed to the drain hole position through the drain seat; and the drain seat is provided with an air duct for guiding flow.

[0010] As a preferred embodiment of the negative pressure water-saving toilet for home use described in this invention, the vacuum pump is equipped with a pressure suction pipe at its suction end, and one end of the pressure suction pipe is connected to the negative pressure chamber, the other end of the pressure suction pipe is connected to the negative pressure chamber, the vacuum pump is equipped with a pressure relief pipe at its venting end, and the end of the pressure relief pipe is connected to an air passage pipe.

[0011] As a preferred embodiment of the negative pressure water-saving toilet for home use described in this invention, wherein: a water injection pipe is provided at the bottom of the toilet body, and a horizontal check valve is installed at one end of the water injection pipe near the drain hole; The sewage outlet is provided with a water inlet adapted to the water inlet pipe, and the water inlet is located on the side of the sewage outlet opposite to the air duct pipe.

[0012] As a preferred embodiment of the negative pressure water-saving toilet for home use described in this invention, the inner wall of the toilet liner is fixedly equipped with multiple sets of button-type nozzles, and the multiple sets of button-type nozzles are arranged in a three-point circular array with the drain outlet of the toilet liner as the center.

[0013] As a preferred embodiment of the negative pressure water-saving toilet for home use described in this invention, the toilet body is equipped with a water storage tank, and the water storage tank is equipped with a water pump. The water pump is electrically connected to the sensor seat ring, and the water pump is connected to a button-type nozzle and a water injection pipe through a water supply pipe.

[0014] In summary, the present invention has at least one of the following beneficial effects: 1. This invention integrates the negative pressure chamber, the air-water separation chamber, and the vacuum pump into the toilet body and inside, achieving a concealed installation of the entire negative pressure unit. The overall appearance of the unit is consistent with that of a regular toilet, without requiring additional bathroom space.

[0015] 2. In this invention, a gravity-fed valve is used in conjunction with a large-diameter sewage discharge passage. Wastewater and domestic wastewater from washing and mopping are discharged directly by their own weight, and are further flushed by an auxiliary water inlet pipe, which effectively prevents pipe blockage.

[0016] 3. This invention, by instantaneously opening the flushing solenoid valve and only sucking out the dirt in the return water bend, combined with the button-type nozzle for segmented and quantitative pre-lubricating water supply, significantly reduces water consumption compared to traditional negative pressure toilets.

[0017] 4. This invention optimizes the operating logic of the negative pressure system and reduces frequent pump and valve wear by using a self-control structure that integrates a pre-lubrication system with an induction seat ring, a negative pressure sensor connected to a flushing solenoid valve, and a timed start-stop mechanism. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a structural diagram showing the installation of the toilet body and the drain outlet according to the present invention. Figure 3 This is a cross-sectional view of the present invention; Figure 4 This is a structural diagram showing the installation of the toilet inner liner and the air-water separation chamber according to the present invention. Figure 5 This is a three-dimensional structural diagram of the gas-liquid separation chamber of the present invention; Figure 6 This is a diagram showing the installation of the gas-liquid separation chamber and vacuum pump according to the present invention.

[0020] Figure 7 and Figure 8 This is an overall structural diagram of the present invention; Figure 9 This is a schematic diagram of the negative pressure chamber of the present invention.

[0021] Explanation of reference numerals in the attached figures: 1. Toilet body; 11. Sensor seat; 12. Drain hole; 13. Water inlet pipe; 131. Horizontal check valve; 2. Toilet liner; 21. Button nozzle; 3. Negative pressure chamber; 4. Air-water separation chamber; 41. Sewage pipe; 411. Return water trap; 42. Negative pressure pipe; 421. Flushing solenoid valve; 43. Sewage seat; 431. Air duct; 432. Water inlet; 5. Vacuum pump; 51. Pressure extraction pipe; 52. Pressure relief pipe; 6. Gravity self-flow valve. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] This invention discloses a negative pressure water-saving toilet for home use.

[0024] Example, refer to Figure 1-6 This invention provides a first embodiment of a negative pressure water-saving toilet for home use. The toilet includes a toilet body 1, a sensor seat 11 with an opening fixedly installed on the toilet body 1, a toilet liner 2 with a top opening fixedly installed inside the toilet body 1, a negative pressure chamber 3 disposed inside the toilet body 1 and around the toilet liner 2, and an air-water separation chamber 4 also disposed inside the toilet body 1. The air-water separation chamber 4 is connected to the toilet liner 2 and the negative pressure chamber 3 respectively through pipes. A vacuum pump 5 is fixedly installed on the side of the toilet body 1 away from the toilet liner 2, and the vacuum pump 5 is connected to the negative pressure chamber 3 through a pipe (e.g., ...). Figure 5The negative pressure chamber 3 is arranged around the inner liner 2 of the toilet. A drain hole 12, corresponding to the air-water separation chamber 4, is located at the bottom of the toilet body 1. The lower end of the air-water separation chamber 4 is connected to the drain hole 12. A gravity-flow valve 6 is installed at the drain hole 12. This device integrates the entire negative pressure system—comprising the traditional external negative pressure chamber 3, the air-water separation chamber 4, and the vacuum pump 5—into the toilet body 1. Through the drain hole 12 at the bottom, the overall dimensions are consistent with conventional household ceramic toilets, eliminating the need to modify the existing bathroom drainage pipes. It can be directly replaced and installed. The negative pressure chamber 3 is shaped by the space formed by the gap between the toilet inner tank 2 and the toilet body 1. It makes full use of the idle space of ordinary toilet base. Unlike the traditional external cylindrical negative pressure tank, it does not occupy extra space when in use. Through the vacuum pump 5 and the negative pressure principle of the negative pressure chamber 3, the waste can be sucked into the air-water separation chamber 4. Then, through the gravity self-flow valve 6, the waste can be discharged directly into the drain hole 12 by its own weight. This allows mopping water and washing wastewater to be poured directly into the toilet inner tank 2, which can effectively prevent debris from clogging the small pipes.

[0025] like Figure 5 As shown, a drain pipe 41 is fixedly installed on the inlet of the air-water separation chamber 4, and a return water bend 411 is provided at the end of the drain pipe 41 that extends out of the air-water separation chamber 4. The return water bend 411 is used to connect to the drain outlet of the toilet inner tank 2. The drain pipe 41 and the return water bend 411 together form a return water bend water seal pipeline connecting the toilet inner tank 2 and the air-water separation chamber 4. Since the lowest position of the return water bend 411 is lower than the position where the drain pipe 41 connects to the air-water separation chamber 4, some of the water entering the return water bend 411 will remain inside the return water bend 411. Normally, the return water bend 411 relies on the water to prevent the backflow of sewer odors, and during the flushing operation, it can achieve negative pressure suction of the dirt inside the return water bend 411.

[0026] The air exchange port of the gas-liquid separation chamber 4 is fixedly connected to the negative pressure pipe 42, and the end of the negative pressure pipe 42 is connected to the negative pressure chamber 3. A flushing solenoid valve 421 is installed between the negative pressure pipe 42 and the negative pressure chamber 3. The flushing solenoid valve 421 is electrically connected to the vacuum pump 5. The flushing solenoid valve 421 is equipped with a negative pressure sensor for real-time monitoring of the air pressure inside the negative pressure chamber 3. In standby mode, the negative pressure chamber 3 maintains a preset negative pressure value. When the negative pressure loss in the chamber is lower than the set threshold, the sensor automatically triggers the vacuum pump 5 to start pressure replenishment. The entire process is intelligent and automatic pressure maintenance, which can maintain a long standby time. If the negative pressure in the negative pressure chamber 3 is lower than -0.05MPa, the sensor triggers the vacuum pump to automatically replenish the pressure to -0.07MPa.

[0027] The lower end of the gas-water separation chamber 4 is fixedly equipped with a drain seat 43, and the drain seat 43 is matched with the drain hole 12. The gravity self-flow valve 6 is fixed to the drain hole 12 through the drain seat 43. The drain seat 43 is equipped with a guide air pipe 431. The drain seat 43 serves as the transfer mounting base of the gas-water separation chamber 4, integrating three passages: sewage discharge, water injection, and air guidance. The air pipe 431 is used for guiding the depressurized gas of the vacuum pump. The depressurized gas is discharged into the drain pipe, and there is no additional exhaust gas discharged outside.

[0028] The vacuum pump 5 is equipped with a pressure suction pipe 51 at the suction end, and one end of the pressure suction pipe 51 is connected to the negative pressure chamber 3. The other end of the pressure suction pipe 51 is connected to the vacuum pump 5. The vacuum pump 5 is equipped with a pressure relief pipe 52 at the vent end, and the end of the pressure relief pipe 52 is connected to the air passage pipe 431. The vacuum pump 5 draws air from the inside of the negative pressure chamber 3 to form a negative pressure environment, and achieves air pressure exchange with the gas-water separation chamber 4 through the negative pressure pipe 42. The discharged atmospheric pressure waste gas flows into the sewer pipe through the pressure relief pipe 52 and the air passage pipe 431.

[0029] A water inlet pipe 13 is installed at the bottom of the toilet body 1. A horizontal check valve 131 is installed at the end of the water inlet pipe 13 near the drain hole 12. The drain seat 43 has a water inlet 432 adapted to the water inlet pipe 13. The water inlet 432 is located on the side of the drain seat 43 away from the air duct pipe 431. The horizontal check valve 131 prevents sewage from backflowing into the water inlet pipe 13. The water output from the water inlet pipe 13 is sent to the drain seat 43 through the water inlet 432. The gravity self-flow valve 6 further ensures the smooth discharge of waste.

[0030] Multiple sets of button-type nozzles 21 are fixedly installed on the inner wall of the toilet liner 2. The multiple sets of button-type nozzles 21 are arranged in a three-point circular array with the drain outlet of the toilet liner 2 as the center. The three-point circular arrangement of button-type nozzles 21 can spray clean water evenly along the inner wall of the toilet liner 2. After the user sits down, the sensor seat ring 11 triggers the nozzles to pre-lubricate the wall in advance, reducing the adhesion of dirt to the inner wall of the liner and further reducing the water consumption of flushing. After flushing, clean water is sent into the return water trap 411 by quantitative water replenishment after each flush, stabilizing the water seal height of the return water trap.

[0031] The toilet body 1 has a built-in water tank, which is equipped with a water pump. The water pump is electrically connected to the sensor seat 11, and the water pump is connected to the button nozzle 21 and the water injection pipe 13 through water supply pipes. The water tank is built into the cavity of the toilet body 1. The water pump is controlled in time by the seat-sitting signal and flushing signal of the sensor seat 11. It supplies pre-lubricating water to the button nozzle 21 and water seal replenishment water to the water injection pipe 13. The total water consumption of the whole machine per flush is far lower than the national standard for water-saving toilets.

[0032] When using this device as a household toilet, when the device is in normal standby mode, the vacuum pump 5 maintains a negative pressure of -0.07MPa inside the negative pressure chamber 3. The horizontal check valve 131 seals the water inlet pipe 13, the gravity self-flow valve 6 closes and blocks the drain hole 12, and the return water bend 411 stores water to form a sealed water seal. When the negative pressure in the negative pressure chamber 3 drops to -0.05MPa due to prolonged static storage, the system drives the vacuum pump 5 to start pumping air until the negative pressure inside the chamber rises back to -0.07MPa, after which the vacuum pump stops to maintain pressure. When a person sits down, the sensor seat ring 11 outputs an electrical signal, and the water pump in the water tank starts to supply water. The water is transported to the button nozzle 21 through the pipeline. The button nozzle 21 sprays out 0.1L of clean water to spray the inner wall of the toilet tank 2 to pre-wet the wall. After pressing the flush button and issuing the command, the flush solenoid valve 421 opens instantly. The negative pressure inside the negative pressure chamber 3 is transmitted to the air-water separation chamber 4 through the negative pressure pipe 42. Through the air pressure difference, 0.7L of sewage inside the return water bend 411 is sucked into the air-water separation chamber 4 through the sewage pipe 41. The sewage opens the gravity flow valve 6 by its own weight and flows into the sewer pipe through the sewage seat 43 and the drain hole 12. The flushing solenoid valve 421 remains open for 1 second and then closes. After a delay of 0.3 seconds, the vacuum pump 5 starts and draws air out of the negative pressure chamber 3 through the pressure extraction pipe 51. Once the negative pressure in the chamber returns to -0.07MPa, the vacuum pump stops operating. The exhaust gas generated by the vacuum pump flows into the drain pipe through the pressure relief pipe 52 and the air passage pipe 431. Then, the water pump in the water storage tank pumps water again, and about 0.3L of water is sent into the drain outlet in the toilet liner 2 through the button nozzle 21. The return water trap 411 is also added to replenish the water seal. Some clean water flows along the water inlet pipe 13 through the horizontal check valve 131 and the water inlet 432 into the drain seat 43. The gravity self-flow valve 6 further ensures the smooth discharge of waste.

[0033] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A negative pressure water-saving toilet for household use, comprising a toilet body (1), wherein a sensor seat ring (11) with an opening is fixedly installed on the toilet body (1), and a toilet liner (2) with a top opening is fixedly installed inside the toilet body (1), characterized in that: The toilet body (1) is equipped with a negative pressure chamber (3) inside and outside the toilet liner (2). The toilet body (1) is also equipped with an air-water separation chamber (4). The air-water separation chamber (4) is connected to the toilet liner (2) and the negative pressure chamber (3) respectively. The toilet body (1) is equipped with a vacuum pump (5). The vacuum pump (5) is connected to the negative pressure chamber (3) through a pipeline. The negative pressure chamber (3) is arranged around the toilet liner (2), and the bottom of the toilet body (1) is provided with a drain hole (12) corresponding to the air-water separation chamber (4). The lower end of the air-water separation chamber (4) is connected to the drain hole (12).

2. The negative pressure water-saving toilet for household use according to claim 1, characterized in that, A drain pipe (41) is fixedly installed on the inlet of the gas-water separation chamber (4), and a return water bend (411) is provided at one end of the drain pipe (41) extending out of the gas-water separation chamber (4). The return water bend (411) is used to connect to the drain outlet of the toilet liner (2). The drain pipe (41) and the return water bend (411) together form a return water bend water seal pipeline connecting the toilet liner (2) and the gas-water separation chamber (4).

3. The negative pressure water-saving toilet for household use according to claim 2, characterized in that, The air exchange port of the gas-water separation chamber (4) is fixedly connected to the negative pressure pipe (42), and the end of the negative pressure pipe (42) is connected to the negative pressure chamber (3). A flushing solenoid valve (421) is installed between the negative pressure pipe (42) and the negative pressure chamber (3). The flushing solenoid valve (421) is equipped with a negative pressure sensor for real-time monitoring of the internal air pressure of the negative pressure chamber (3). The flushing solenoid valve (421) is electrically connected to the vacuum pump (5).

4. The negative pressure water-saving toilet for household use according to claim 1, characterized in that, The lower end of the gas-water separation chamber (4) is fixedly equipped with a drain seat (43), and the drain seat (43) is matched with the drain hole (12). The gravity self-flow valve (6) is fixed to the drain hole (12) through the drain seat (43). The drain seat (43) is provided with a guide air pipe (431).

5. The negative pressure water-saving toilet for household use according to claim 1, characterized in that, The vacuum pump (5) is equipped with a pressure suction pipe (51) at the suction end, and one end of the pressure suction pipe (51) is connected to the negative pressure chamber (3), and the other end of the pressure suction pipe (51) is connected to the negative pressure chamber (3). The vacuum pump (5) is equipped with a pressure relief pipe (52) at the venting end, and the end of the pressure relief pipe (52) is connected to the air passage pipe (431).

6. The negative pressure water-saving toilet for household use according to claim 4, characterized in that, A water inlet pipe (13) is installed at the bottom of the toilet body (1), and a horizontal check valve (131) is installed at one end of the water inlet pipe (13) near the drain hole (12). The drain seat (43) is provided with a water inlet (432) adapted to the water inlet pipe (13), and the water inlet (432) is located on the side of the drain seat (43) away from the air duct pipe (431).

7. The negative pressure water-saving toilet for household use according to claim 5, characterized in that, The inner wall of the toilet liner (2) is fixedly equipped with multiple sets of button-type nozzles (21), and the multiple sets of button-type nozzles (21) are arranged in a three-point ring array with the drain outlet of the toilet liner (2) as the center.

8. The negative pressure water-saving toilet for household use according to claim 7, characterized in that, The toilet body (1) is equipped with a water tank, and the water tank is equipped with a water pump. The water pump is electrically connected to the sensor seat ring (11), and the water pump is connected to the button nozzle (21) and the water injection pipe (13) through the water supply pipe.

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