Negative pressure self-suction water-saving toilet
By designing a negative pressure self-priming water-saving toilet, the negative pressure vacuum pump and nozzle work together to solve the problems of water waste, high cost, incompatible installation, and loud noise of traditional toilets, achieving the effects of low water consumption, high efficiency in sewage discharge, reduced energy consumption, and improved versatility.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINGNING (HEBEI) ENVIRONMENTAL PROTECTION EQUIP MFG CO LTD
- Filing Date
- 2025-08-23
- Publication Date
- 2026-07-14
AI Technical Summary
Traditional negative pressure toilets and squat toilets have problems such as water waste, high production costs, incompatible installation, high noise, low efficiency and safety hazards.
The toilet adopts a negative pressure self-priming water-saving design, which utilizes a negative pressure vacuum pump and a spray nozzle to work together to form a strong negative pressure siphon, reducing water demand, simplifying component connections, reducing energy consumption, and increasing versatility and safety.
It achieves efficient sewage discharge with low water volume, reduces production and maintenance costs, reduces noise, improves versatility and efficiency, avoids leakage risks, and enhances user experience.
Smart Images

Figure CN224495315U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of negative pressure toilet technology, and in particular to a negative pressure self-priming water-saving toilet. Background Technology
[0002] Traditional negative pressure toilets and squat toilets have many obvious drawbacks in daily use. In terms of water conservation, these products consume a large amount of water per flush, leading to serious water waste in the long run, which contradicts the current advocacy of green environmental protection. Regarding cost, traditional toilets are expensive due to complex manufacturing processes and high component costs, increasing the overall price burden on consumers. In terms of versatility, different brands and models have significant differences in installation dimensions and interface specifications, making them difficult to interchange and causing great inconvenience for users in later replacements and repairs. Furthermore, the water flow impacting the pipes and water surface during flushing generates considerable noise, especially at night, which can easily disturb the rest of users and their families.
[0003] Furthermore, existing vacuum toilets also have significant drawbacks. Their operation relies on a vacuum pump to create negative pressure and store it in a pressure tank, a process that is time-consuming and affects efficiency. Simultaneously, the pressure tank is not only energy-intensive but also prone to leaks, increasing operating costs and posing safety hazards. Based on these issues, we propose a negative pressure self-priming water-saving toilet to address these problems. Utility Model Content
[0004] The purpose of this invention is to provide a negative pressure self-priming water-saving toilet to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a negative pressure self-priming water-saving toilet, comprising a cement floor, a toilet body installed on the cement floor, a rear chamber installed at the rear end of the toilet body, a control box installed on the outer wall of the front end of the rear chamber, a power interface installed on the side end of the rear chamber, a negative pressure vacuum pump installed inside the rear chamber, multiple sets of nozzles provided inside the toilet body, the side end of the negative pressure vacuum pump connected to the bottom of the toilet body through a sewage pipe, and the bottom end of the negative pressure vacuum pump connected to a drain pipe through a fan duct.
[0006] As an improved technical solution, the inner wall of the rear enclosure is covered with sound-absorbing cotton.
[0007] As an improved technical solution, an inspection door is hinged to the right side of the rear housing, and a mechanical lock is installed on the inspection door.
[0008] As an improved technical solution, the toilet body is covered with an aluminum plate.
[0009] As an improved technical solution, a touch switch board is installed on the outside of the control box, and the output end of the control box is electrically connected to the negative pressure vacuum pump through a wire.
[0010] As an improved technical solution, the multiple sets of nozzles inside the toilet body are all located on the upper part of the inner wall of the toilet body.
[0011] After adopting the above technical solution, the beneficial effects of this utility model are:
[0012] I. This utility model features a negative pressure vacuum pump installed in the rear chamber. When the user triggers the flush command, the nozzle releases a small amount of water to flush the inner wall of the toilet body. At the same time, the negative pressure vacuum pump starts instantly, creating a strong negative pressure siphon in the sewage pipe. This, along with the water flow, rapidly draws the waste from the toilet body to the drain pipe. The combined effect of water flushing and negative pressure suction allows for thorough waste removal using only the amount of water required for a traditional toilet. The negative pressure vacuum pump generates negative pressure instantly, eliminating the need for a pre-pressurization tank, thus preventing leakage risks and effectively reducing energy consumption. Furthermore, the installation structure of this device is compatible with traditional toilets, allowing for direct replacement of older products.
[0013] II. The wiring connections between the components of this utility model are simple, reducing the risk of failure caused by complex wiring, while also reducing production and maintenance costs. Furthermore, the installation structure of the toilet body is universal with traditional toilets, allowing it to directly replace old products. Users do not need to modify the installation location and pipes in the bathroom, and can directly replace traditional products, thus improving the product's versatility and practicality. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present invention;
[0015] Figure 2 This is a partial cross-sectional structural diagram of the present invention;
[0016] Figure 3 This is a schematic diagram of the second embodiment of the present invention.
[0017] In the diagram: 1. Toilet body; 2. Cement floor; 3. Rear chamber; 4. Inspection door; 5. Control box; 6. Power interface; 7. Aluminum plate; 8. Negative pressure vacuum pump; 9. Sewage conveying pipe; 10. Sprayer head; 11. Fan duct; 12. Drainage pipe fittings. Detailed Implementation
[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0019] This utility model provides the following technical solution:
[0020] Implementation 1: As Figures 1 to 3 As shown, a negative pressure self-priming water-saving toilet includes a cement floor 2, a toilet body 1 installed on the cement floor 2, a rear chamber 3 installed at the rear end of the toilet body 1, a control box 5 installed on the outer wall of the front end of the rear chamber 3, a power interface 6 installed on the side end of the rear chamber 3, a negative pressure vacuum pump 8 installed inside the rear chamber 3, multiple sets of nozzles 10 are provided inside the toilet body 1, the side end of the negative pressure vacuum pump 8 is connected to the bottom of the toilet body 1 through a sewage pipe 9, and the bottom end of the negative pressure vacuum pump 8 is connected to a drain pipe fitting 12 through a fan duct 11.
[0021] By installing a negative pressure vacuum pump 8 in the rear housing 3, when the user triggers the flush command, the nozzle 10 releases a small amount of water to flush the inner wall of the toilet body 1. At the same time, the negative pressure vacuum pump 8 starts instantly, forming a strong negative pressure siphon in the sewage pipe 9. Together with the water flow, it draws the sewage in the toilet body 1 to the drain pipe fitting 12 at high speed. The water flushing and negative pressure suction work together to completely flush the sewage with only 1 / 10 of the water volume of a traditional toilet. The negative pressure vacuum pump 8 can generate negative pressure instantly, eliminating the need for a pre-pressurization tank, preventing leakage risks, and effectively reducing energy consumption. Moreover, the installation structure of this device is compatible with traditional toilets and can directly replace old products.
[0022] In other embodiments, the inner wall of the rear enclosure 3 is covered with sound-absorbing cotton;
[0023] This design allows the sound-absorbing cotton to absorb the vibration noise generated by the negative pressure vacuum pump 8 during operation through its porous structure, preventing the rear housing 3 from amplifying mechanical noise and improving the nighttime user experience.
[0024] In other embodiments, a maintenance door 4 is hinged to the right side of the rear housing 3, and a mechanical lock is installed on the maintenance door 4;
[0025] The inspection door 4 is opened and closed by a mechanical latch, allowing direct access to the internal components of the rear enclosure 3 during maintenance, thus facilitating the inspection of the interior of the rear enclosure 3.
[0026] In other embodiments, the toilet body 1 is covered with an aluminum plate 7;
[0027] This design allows the aluminum plate 7 to be tightly bonded to the surface of the toilet body 1 through stamping, forming a physical protective layer that isolates moisture and chemical cleaning agents, thus extending the service life of the toilet body 1.
[0028] In other embodiments, a touch switch board is installed on the outside of the control box 5, and the output terminal of the control box 5 is electrically connected to the negative pressure vacuum pump 8 through a wire;
[0029] This design allows the touch switch panel to be touched by the user, thereby simultaneously activating the nozzle 10 and the negative pressure vacuum pump 8. This simplifies the operation logic, avoids the malfunctions of traditional mechanical buttons, ensures a short interval between water flow and negative pressure activation, and maximizes sewage discharge efficiency.
[0030] In other embodiments, the multiple sets of nozzles 10 inside the toilet body 1 are all located on the upper end of the inner wall of the toilet body 1;
[0031] This design allows multiple nozzles 10 to fully wet the inner wall of the toilet body 1, preventing debris from adhering to the inner wall of the toilet body 1.
[0032] Example 2: Figure 3 As shown, when the toilet body 1 is a seated toilet, the working principle is the same as in Embodiment 1. The other structures are adjusted according to the actual situation, and will not be described in detail here.
[0033] The electrical components mentioned in this article are all common, known equipment.
[0034] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model 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 solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A negative pressure self-priming water-saving toilet, comprising a cement floor (2), wherein a toilet body (1) is installed on the cement floor (2), characterized in that: The toilet body (1) has a rear chamber (3) installed at the rear end. The rear chamber (3) has a control box (5) installed on the outer wall of the front end. The rear chamber (3) has a power interface (6) installed on the side. The rear chamber (3) has a negative pressure vacuum pump (8) installed inside. The toilet body (1) has multiple sets of nozzles (10). The side of the negative pressure vacuum pump (8) is connected to the bottom of the toilet body (1) through a fecal conveying pipe (9). The bottom of the negative pressure vacuum pump (8) is connected to the drain pipe fitting (12) through a fan duct (11).
2. The negative pressure self-priming water-saving toilet according to claim 1, characterized in that: The inner wall of the rear enclosure (3) is covered with sound-absorbing cotton.
3. The negative pressure self-priming water-saving toilet according to claim 1, characterized in that: The rear housing (3) is hinged to the right side with an inspection door (4), and the inspection door (4) is equipped with a mechanical lock.
4. The negative pressure self-priming water-saving toilet according to claim 1, characterized in that: The toilet body (1) is covered with an aluminum plate (7).
5. A negative pressure self-priming water-saving toilet according to claim 1, characterized in that: The control box (5) is equipped with a touch switch board on the outside, and the output end of the control box (5) is electrically connected to the negative pressure vacuum pump (8) through a wire.
6. A negative pressure self-priming water-saving toilet according to claim 1, characterized in that: The multiple sets of nozzles (10) inside the toilet body (1) are all located on the upper part of the inner wall of the toilet body (1).