Large-size water-saving negative pressure toilet squatting pan

Abstract

The application discloses a large-size water-saving negative pressure toilet squatting pan, and relates to the technical field of sanitary wares. The squatting pan comprises a basin, a first arc-shaped inclined surface is arranged between the front end of the basin and a sewage outlet, and the front end of the basin is provided with a first water jet nozzle. A water inlet channel and a plurality of water outlet channels are arranged in the first water jet nozzle. One end of the water inlet channel is communicated with the outside, one end of the plurality of water outlet channels is communicated with the other end of the water inlet channel, the sum of the cross-sectional areas of the plurality of water outlet channels is smaller than the cross-sectional area of the water inlet channel, the plurality of water outlet channels are arranged in a fan shape in sequence, the other end of the plurality of water outlet channels is formed with a water outlet, and the plurality of water outlets are arranged along an arc in sequence and face the sewage outlet. The plurality of water outlets are matched with the first arc-shaped inclined surface. The squatting pan has the characteristics of saving water, full coverage of the flushing range and large flushing force when flushing the basin, and can ensure that the basin is flushed clean under the condition of less water consumption.

Description

Technical Field

[0001] This invention relates to the field of sanitary ware technology, specifically to a large-size water-saving negative pressure squat toilet. Background Technology

[0002] Squat toilets are a very common type of sanitary ware used in daily life, characterized by the user squatting and suspending themselves during defecation. In existing technology, common squat toilets typically come in sizes such as 520mm*420mm*220mm and 580mm*450mm*270mm, which are often too small. This often leads to situations where excrement falls outside the toilet bowl due to the small dimensions, or where dirty water splashes onto the user due to the shallow depth, significantly impacting the user experience. To address these issues and improve the user experience, those skilled in the art have focused on the design and manufacture of larger-sized squat toilets.

[0003] However, when designing large-sized squat toilets, the increased width and depth of the toilet bowl lead to a larger surface area of ​​the inner wall of the bowl, making it difficult to clean thoroughly and resulting in excessive water consumption in practical applications.

[0004] In existing technology, the most common toilet flushing structure involves multiple side flushing holes along the inner walls of both sides of the upper circumference of the toilet bowl. Water is sprayed out from these holes to flush the toilet. In this type of flushing structure, the outlets of the side flushing holes are usually designed to face the toilet bowl. However, when applied to large squat toilets, due to the increased width of the toilet bowl, this type of flushing structure with holes on the upper circumference of the bowl cannot provide complete coverage, often resulting in inadequate flushing. To achieve a flushing effect, a larger water flow is required, wasting water resources. Furthermore, when the water flow is too large, some water flows upward or bounces after hitting the toilet bowl, spraying out of the bowl and causing fecal splashing, which negatively impacts the user experience.

[0005] In addition, existing technologies also include squat toilets with spray structures that utilize 2-3 nozzles for direct flushing. However, these spray structures typically have only one water flow channel within the nozzle, which diffuses the water flow by creating a flat shape at the outlet to achieve a larger coverage area of ​​the toilet bowl bottom. While this single-flow-channel nozzle structure can increase the flow velocity to a certain extent through the jet principle, its effect on increasing water flow velocity is limited. When applied to large-sized squat toilets, to achieve complete coverage of the toilet bowl bottom, either a larger diffusion range at the nozzle outlet is required, or the number of nozzles needs to be increased. In practical applications, with the nozzle inlet water flow conditions remaining constant, increasing the diffusion range at the nozzle outlet will lead to a decrease in water pressure and flow velocity at the outlet, making it difficult to flush cleanly. This necessitates increasing the given water pressure at the nozzle inlet, resulting in the use of more water. Conversely, if more nozzles are used, the water pressure at the nozzle inlet must remain constant to ensure sufficient flushing force for each nozzle, which also consumes more water due to the increased number of nozzles.

[0006] In existing technologies, toilet flushing methods are generally divided into two types: tank flushing and direct flushing with an external pressurized water source. While direct flushing with an external pressurized water source can achieve a thorough clean by increasing water pressure and volume without considering water waste, it is unsuitable for water-scarce applications such as portable toilets or public toilets in scenic areas where sufficient pressure is difficult to obtain. Therefore, even large-sized squat toilets are mostly found in applications such as hotels and urban residences. As for tank flushing, the tank is generally not sealed, relying solely on the gravity of the water to flush the toilet. The water pressure is relatively low, often requiring multiple flushes to achieve a thorough clean. Multiple flushes not only waste water but also require waiting for the tank to refill, wasting time and negatively impacting the user experience.

[0007] Overall, in the design of large-sized squat toilets, how to ensure thorough flushing (comprehensive coverage and sufficient flushing power) while minimizing water consumption has always been a technical challenge that those skilled in the art have been working hard to research. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide a large-size water-saving negative pressure toilet squatting device. Through the structural design of the spray nozzle and the matching design of the spray nozzle outlet with the shape of the bottom surface of the toilet bowl, the spray nozzle can fully cover the internal area of ​​the toilet bowl with a small amount of water and has sufficient flushing force to ensure the flushing effect.

[0009] The objective of this invention is achieved through the following technical solution:

[0010] A large-size water-saving negative pressure squat toilet includes a toilet bowl with a drain outlet at the bottom. A first arc-shaped inclined surface is provided between the front end of the toilet bowl and the drain outlet. A first spray nozzle is provided at the front end of the toilet bowl. The first spray nozzle includes a nozzle body with an inlet channel and several outlet channels. One end of the inlet channel is connected to the outside, and one end of each of the outlet channels is connected to the other end of the inlet channel. The sum of the cross-sectional areas of the outlet channels is less than the cross-sectional area of ​​the inlet channel. The outlet channels are arranged in a fan shape, and each outlet has a water outlet at its other end. The outlets are arranged along an arc towards the drain outlet. Each outlet is adapted to the first arc-shaped inclined surface so that the jet of water sprayed from each outlet can diffuse along the surface of the first arc-shaped inclined surface when it contacts it. This setting allows the toilet to be flushed while simultaneously saving water, providing full coverage, and delivering strong flushing power, ensuring the toilet is thoroughly cleaned.

[0011] Furthermore, the cross-sectional area of ​​the water outlet channel gradually widens from the end closest to the water inlet channel, allowing the water flow to diffuse rapidly after entering the water outlet channel, thus enhancing the pressurization effect and ensuring sufficient flushing force.

[0012] Furthermore, the cross-section of the water outlet channel is elliptical, which helps to diffuse the angle, making the rinsing more targeted and facilitating full-coverage rinsing.

[0013] Specifically, the first spray nozzle includes a threaded connecting rod and a columnar boss; one end of the threaded connecting rod is connected to one end of the columnar boss, the water inlet channel is disposed within the threaded connecting rod, the end of the water inlet channel away from the water outlet channel is disposed on the end of the threaded connecting rod away from the columnar boss and communicates with the outside, the water outlet channel is disposed within the columnar boss, and the end of the water outlet channel away from the water inlet channel is disposed on the side wall of the columnar boss and communicates with the outside. This spray nozzle can be quickly installed by bolt connection and is also easy to match the shape of the bottom of the toilet bowl.

[0014] Furthermore, the columnar protrusion is provided with several diversion chambers, and the water inlet channel is connected to all of the diversion chambers; among the several water outlet channels, the two located on both sides are two side jet channels, and the main jet channel is located between the two side jet channels; each of the two side jet channels is connected to one of the diversion chambers, and the several main jet channels are connected to the other diversion chambers one by one. The diversion chambers help to keep the water pressure at the inlet of each main jet channel relatively consistent, ensuring that the water pressure of the water jet from the main jet channel tends to be stable; while the two side jet channels are connected to a diversion chamber to distribute the water pressure, preventing the water pressure from being too high and directly rushing out of the top of the toilet bowl.

[0015] Preferably, there are five main spray channels: a central main spray channel, two first main spray channels, and two second main spray channels. The axis of the central main spray channel is coplanar with the axis of the sewage outlet. The two side spray channels, the two first main spray channels, and the two second main spray channels are symmetrically arranged on both sides of the central main spray channel. In the horizontal projection direction, the angle between the central main spray channel and the first main spray channels is 20 degrees, the angle between the central main spray channel and the second main spray channel is 38 degrees, and the angle between the central main spray channel and the side spray channels is 78 degrees. In the vertical application direction, the angle between the central main spray channel and the first main spray channel is 4 degrees, the angle between the central main spray channel and the second main spray channel is 21 degrees, and the angle between the central main spray channel and the side spray channels is 29 degrees.

[0016] Furthermore, a second arc-shaped inclined surface is provided between the rear end of the toilet bowl and the drain outlet. A second water spray nozzle is provided at the rear end of the toilet bowl. The structure of the second water spray nozzle is the same as that of the first water spray nozzle. Several outlets of the second water spray nozzle are adapted to the second arc-shaped inclined surface so that when the jet of water comes into contact with the second arc-shaped inclined surface, it can diffuse along the surface of the second arc-shaped inclined surface. The inclination angle of the first arc-shaped inclined surface is approximately 20 degrees, and the inclination angle of the second arc-shaped inclined surface is approximately 60 degrees.

[0017] The beneficial effects of this invention are:

[0018] In this large-size water-saving negative pressure squat toilet, a first arc-shaped inclined surface is provided between the front end of the toilet bowl and the sewage outlet, and a first water spray nozzle is provided at the front end of the toilet bowl; the first water spray nozzle is provided with a water inlet channel and multiple water outlet channels, the sum of the cross-sectional areas of the water outlet channels is less than the cross-sectional area of ​​the water inlet channel. The water outlet channels are arranged in a fan shape, and the water outlets of the water outlet channels are arranged in a curved direction towards the sewage outlet. When the column of water sprayed from each water outlet comes into contact with the first arc-shaped inclined surface, it can spread along the surface of the first arc-shaped inclined surface.

[0019] By incorporating multiple water outlet channels, the water jets from the nozzles can still fully cover the bottom of the toilet bowl even when its size increases. The inlet of each outlet channel connects to the inlet channel at the same location. The sum of the cross-sectional areas of all outlet channels is less than that of the inlet channel. Based on the Laval pressure-boosting effect, each outlet channel effectively pressurizes and accelerates the water flow. Furthermore, the principle of equal pressure distribution allows for easy design of the specific shape, size, and position of each outlet channel to adjust the acceleration effect, ensuring that the water flow distribution matches the shape of the first arc-shaped inclined surface. The outlets of each channel are arranged sequentially along an arc towards the drain outlet and are adapted to the first arc-shaped inclined surface. This allows the water flow from each outlet channel to spread along the surface of the first arc-shaped inclined surface during flushing, creating a shovel-like effect, making the flushing process more targeted and reducing the required flushing force to some extent. The fan-shaped arrangement of the outlet channels also enhances flushing capacity during the flushing process by utilizing the differential and mutual flow carrying effects between the water jets from each channel, further reducing the required flushing force.

[0020] Overall, this large-size water-saving negative pressure squat toilet can simultaneously meet the three core requirements of strong flushing power, reduced water consumption, and comprehensive coverage, ensuring that the large-size squat toilet can still be cleaned with a small amount of water. Attached Figure Description

[0021] Figure 1 This is a side sectional view of a large-size water-saving negative pressure squat toilet according to the present invention;

[0022] Figure 2 This is a top view of a large-size water-saving negative pressure squat toilet according to the present invention;

[0023] Figure 3 This is a schematic diagram of the spray nozzle structure in a large-size water-saving negative pressure toilet squatting device according to the present invention;

[0024] Figure 4 for Figure 3 The diagram shows the internal structure of the water nozzle, i.e., the internal water structure after the structural components are removed when water is flowing through it.

[0025] Figure 5 for Figure 3 The diagram shows the distribution structure of the flow divider and water outlet channel of the water nozzle in the horizontal projection direction.

[0026] Figure 6 for Figure 3 A schematic diagram illustrating the simulation effect of static pressure and flow velocity of the water nozzle shown.

[0027] Figure 7This is a comparison diagram of simulation data between the spray nozzle in the large-size water-saving negative pressure toilet squatting device of the present invention and the existing single-channel flat outlet spray nozzle. Detailed Implementation

[0028] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0029] like Figure 1 , Figure 2 As shown, a large-size water-saving negative pressure toilet squatting device includes a toilet bowl, a drain outlet 11 at the bottom of the toilet bowl, a first arc-shaped inclined surface 10 between the front end of the toilet bowl and the drain outlet 11, and a first spray nozzle 20 at the front end of the toilet bowl.

[0030] like Figures 3 to 5 As shown, the first water nozzle 20 includes a water nozzle body, which is provided with a water inlet channel and several water outlet channels 2. One end of the water inlet channel is connected to the outside, and one end of each of the several water outlet channels 2 is connected to the other end of the water inlet channel. The sum of the cross-sectional areas of the several water outlet channels 2 is less than the cross-sectional area of ​​the water inlet channel. The several water outlet channels 2 are arranged in a fan shape. The other end of each of the several water outlet channels 2 forms a water outlet. The several water outlets are arranged in a curved line towards the sewage outlet 11.

[0031] When water is introduced into the inlet channel, the water flows through one end of the inlet channel into several outlet channels 2, and is sprayed out from the other end of the outlet channels 2, forming a columnar water line. The aforementioned outlet channels 2 are arranged in a fan shape, and the outlets formed at the other ends of the outlet channels 2 are arranged in a sequential arc towards the sewage outlet 11, so that the outlets are all adapted to the first arc-shaped inclined surface 10, so that when the front end of the columnar water line sprayed from each outlet impacts and contacts the first arc-shaped inclined surface 10, it diffuses to both sides along the surface of the first arc-shaped inclined surface 10. Thus, the water jets from several water outlets 2 form multiple diffused flushing water surfaces on the surface of the first arc-shaped inclined surface 10. These flushing water surfaces overlap each other, achieving full coverage of the first arc-shaped inclined surface 10. Each flushing water surface interacts with the others and flows forward along the first arc-shaped inclined surface 10. When flushing the toilet, it essentially scrapes and cuts the dirt on the first arc-shaped inclined surface 10, making it relatively easy to scrape up the dirt. Under the drive of the subsequent water flow, the dirt is pushed to the drain outlet 11, completing the flushing of the squat toilet.

[0032] When in use, the water jet from the first nozzle 20 of this large-size water-saving negative pressure squat toilet scoops up the excrement and washes the entire first arc-shaped inclined surface 10. In terms of flushing force, it only needs to be sufficient to scoop up the excrement to achieve a clean wash, which is less demanding than the flushing structure of existing squat toilets. In specific implementation, the inclination angle of the first arc-shaped inclined surface 10 is approximately 20 degrees. After the excrement is scooped up, the area between the excrement and the first arc-shaped inclined surface 10 is largely covered by a water layer, allowing the excrement to easily slide into the drain outlet 11 along the water flow. Unlike existing squat toilets with spray structures, which require higher water pressure and flow rate to push the excrement, this design addresses this issue. Furthermore, the fan-shaped arrangement of the water outlets not only achieves the aforementioned full coverage but also allows for a differential arrival process of the flushing water from the corresponding water outlets 2 on the main accumulation area of ​​the excrement. This results in a flushing process that starts from the center and then moves to the sides, further reducing the required flushing force. In addition, this large-size water-saving negative pressure toilet squatting unit is equipped with a vacuum suction system. When the excrement is brought into the drain outlet 11, the excrement can be easily sucked away by the vacuum suction system, unlike conventional flush toilets, which require higher water pressure and volume to flush away the waste.

[0033] During the rinsing process, since the inlet ends of each outlet channel 2 are connected to the same position in the inlet channel, according to the principle of equal pressure distribution, the water pressure at each part tends to be consistent at this position, and the water pressure at the inlet of each outlet channel 2 is basically consistent. Because the sum of the cross-sectional areas of each outlet channel 2 is less than the cross-sectional area of ​​the inlet channel, when the water flows through the equal pressure distribution channels into each outlet channel 2, a Laval pressure boosting effect is generated in each outlet channel 2, which can increase the flow velocity at the outlet of the outlet channel 2. The multiple outlet channels 2 described above can individually accelerate the water flow inside them, ensuring that the outlet water flow has sufficient velocity to meet the cutting requirements. Since the water flows through equal pressure channels before entering each outlet channel 2, the water pressure at the inlet end of each outlet channel 2 tends to be equal, that is, slightly equal to the water pressure at the end where the inlet channel connects to each outlet channel 2. Therefore, it is relatively convenient to design the diameter, length or outlet position of each outlet channel 2 so that the flow velocity or pressure of the water jet from the outlet of each outlet channel 2 is matched with each other and the whole is adapted to the first arc-shaped inclined surface 10. Under the premise of ensuring clean flushing (full coverage and sufficient flushing force), the purpose of saving water resources is achieved.

[0034] like Figure 7 The image shows simulation comparison data between the nozzle structure of this embodiment and the single-channel flat outlet nozzle structure at a given inlet water velocity of 2 m / s and inlet water pressure of 3.5 MPa:

[0035] Detection points 1-10 are longitudinally distributed measuring points. In a single-channel nozzle, measuring points are set at equal intervals along the center. In this embodiment, the measuring points are set at equal intervals within the central water outlet channel 2 (i.e., the central main jet channel 22 described later). Simulation comparison shows that, under the same water inlet conditions, the nozzle structure of this embodiment has a much better effect on accelerating the water flow than the single-channel nozzle.

[0036] Detection points 11-17 are horizontally distributed measuring points, located at the outlet positions of each water outlet channel 2 in this embodiment's spray nozzles. In single-channel spray nozzles, they are horizontally distributed along their flat outlets (the distribution angle of each measuring point corresponds to the measuring points set in this embodiment's spray nozzles). Simulation comparison shows that in this embodiment's spray nozzle structure, the water velocity is highest in the central water outlet channel 2, gradually decreasing towards both sides. This is more conducive to targeted flushing of waste in the squat toilet. Conversely, in single-channel spray nozzles, the water flow velocity is highest on both sides of the outlet, while the water flow velocity is slowest in the central area corresponding to the waste flushing zone. To achieve a thorough flush with this type of spray nozzle, a larger water supply is required, resulting in greater water consumption.

[0037] Furthermore, the cross-sectional area of ​​the water outlet channel 2 gradually widens from the end closest to the water inlet channel, allowing the water flow to spread rapidly after entering the water outlet channel 2, avoiding obstruction at the inlet of the water outlet channel 2, and further enhancing the pressurization effect of each water outlet channel 2.

[0038] Furthermore, since the required flushing force varies depending on the direction of the excrement's downward cutting motion during the flushing process, the elliptical cross-section of the aforementioned water outlet channel 2 helps to further improve the local cutting force through the divergence angle of this elliptical water outlet channel 2. This allows the columnar water line formed by the water outlet channel 2 to achieve more targeted flushing after diffusion, resulting in a greater cutting force in the middle and a smaller cutting force at the edges. In contrast, a conventional design with a simple circular cross-section would reduce the divergence range of the water outlet channel 2, decreasing the contact area between the columnar water line and the first arc-shaped inclined surface 10. This would lead to increased splashing water and a smaller diffusion coverage area for the columnar water lines in each water outlet channel 2, resulting in incomplete cleaning.

[0039] In specific implementation, such as Figures 3 to 5As shown, the nozzle body of the first spray nozzle 20 includes a threaded connecting rod 3 and a columnar boss 4, with one end of the threaded connecting rod 3 connected to one end of the columnar boss 4. The aforementioned water inlet channel is disposed within the threaded connecting rod 3 along its axis. The end of the water inlet channel away from the water outlet channel 2 is located at the end of the threaded connecting rod 3 away from the columnar boss 4 and communicates with the outside. The water outlet channel 2 is disposed within the columnar boss, with the end of the water outlet channel away from the water inlet channel located on the side wall of the columnar boss 4 and communicates with the outside. In application, a silicone pad and a nut are also provided. Through the cooperation of the silicone pad and nut with the first arc-shaped inclined surface 10, the first spray nozzle 20 can be directly installed on the squat toilet. The installation process is similar to bolt installation, which is extremely convenient.

[0040] Specifically, several diversion chambers are set within the columnar protrusion 4, separated by partitions. The water inlet channel is connected to all of these diversion chambers, achieving equal pressure diversion through the arrangement of these chambers. Among the aforementioned water outlet channels 2, two side jet channels 21 are located on both sides, and the main jet channel is located between the two side jet channels 21. Each of the two side jet channels 21 is connected to one of the diversion chambers, and the main jet channels are connected to the other diversion chambers one by one. Separating the diversion chambers by partitions effectively prevents water flow from interfering with each other or forming turbulence, keeping the water pressure at the inlet of each main jet channel relatively uniform, ensuring that the water pressure of the main jet channel meets the design requirements and tends to be stable. The side jet channels 21 on both sides are mainly used to flush the sides of the squat toilet bowl, and they are all connected to the aforementioned diversion chamber to divide the water pressure, preventing the water pressure from being too high and directly rushing out of the top of the toilet bowl.

[0041] Specifically, there are five main jet channels: a central main jet channel 22, two first main jet channels 23, and two second main jet channels 24. The axis of the central main jet channel 22 is coplanar with the axis of the drain outlet 11. The two side jet channels 21, the two first main jet channels 23, and the two second main jet channels 24 are symmetrically arranged on both sides of the central main jet channel. A first main jet zone 51 is formed between the central main jet channel 22 and the two first main jet channels 23. A second main jet zone 52 is formed between the two first main jet channels 23 and the second main jet channels 24. A side jet zone 53 is formed between the second main jet channel 24 and the side jet channels 21. During the actual flushing process, the water flow from two jet channels in each jet zone diffuses and then converges differentially to flush the bottom of the toilet bowl. The water flow from the first main jet zone 51 and the second main jet zone 52 is directed towards the area where the excrement is located and arrives sequentially, cutting and pushing the excrement to the drain outlet. The side jet zone 53 mainly acts on both sides of the toilet bowl 5, achieving full coverage flushing of the toilet bowl 5. In this design, at least seven spray channels are required because, in experimental verification, if five or fewer spray channels are used (the nozzle diameter must be controlled within 2mm to achieve water-saving effect and to ensure thorough cleaning through increased water flow), the spray coverage cannot meet the requirements. When spraying, the nozzles need to be swung to achieve full coverage and cleaning of the squat toilet, which results in splashing.

[0042] In practical implementation, the number of spray channels on the water nozzle is increased to seven, and the spray direction of each channel is adjusted so that, in the horizontal projection direction, the angle between the central main spray channel 22 and the first main spray channel 23 is 20 degrees, the angle between the central main spray channel 22 and the second main spray channel 24 is 38 degrees, and the angle between the central main spray channel 22 and the side spray channel 21 is 78 degrees; in the vertical application direction, the angle between the central main spray channel 22 and the first main spray channel 23 is 4 degrees, the angle between the central main spray channel 22 and the second main spray channel 24 is 21 degrees, and the angle between the central main spray channel 22 and the side spray channel 21 is 29 degrees. This configuration effectively controls the amount of water splashing and achieves full coverage. It should be noted that adding more spray channels to the water nozzle would increase its size due to manufacturing requirements, potentially affecting the product's appearance.

[0043] In specific implementation, a second arc-shaped inclined surface 30 is provided between the rear end of the toilet bowl and the drain outlet 11. A second water nozzle 40 is provided at the rear end of the toilet bowl. The structure of the second water nozzle 40 is the same as that of the first water nozzle 20. Several outlets of the second water nozzle 40 are adapted to the second arc-shaped inclined surface 30 so that when the jet of water comes into contact with the second arc-shaped inclined surface 30, it can spread along the surface of the second arc-shaped inclined surface 30. The working process of the second water nozzle 40 is basically the same as that of the first water nozzle 20. At the same time, since the second arc-shaped inclined surface 30 is not the main accumulation area of ​​excrement, and the inclination angle of the second arc-shaped inclined surface 30 is basically 60 degrees, the waste is more likely to slide down to the drain outlet 11. Compared with the first arc-shaped inclined surface 10, it is relatively easier to flush. Therefore, its flushing process will not be described in detail here.

[0044] like Figure 6 The diagram shows a simulation of the static pressure and velocity at various points within the nozzle, given a fluid velocity of 2 m / s at the inlet and a pressure of 3.5 MPa. As can be seen, the pressure inside the nozzle cavity gradually decreases towards the outlet, and the fluid velocity significantly increases after passing through the internal channels of the nozzle cavity. This indicates a significant increase in the water flow velocity entering each main jet channel, effectively addressing the issue of insufficient water pressure from the nozzles, which can lead to failure to flush away waste. According to simulation data, the average water velocity from the nozzle is approximately 5 m / s, and flushing the toilet only takes 2 seconds to achieve the required cleanliness. Therefore, the flow rate Q for flushing the toilet with two nozzles is approximately 7.7 × [missing value]. The water consumption per flush is approximately 0.77 liters (m³ / s). Considering error correction, the average water consumption per flush in actual use is about 0.7 to 1 liter. However, conventional squat toilets with a spray structure around the upper edge of the bowl require significant water pressure and at least 10 seconds of flushing time to achieve the desired cleanliness, resulting in a high water flow rate of at least 6 liters. Even with a single-channel flat-outlet spray nozzle, at least 2.5 liters of water are needed. Therefore, the spray nozzle in this squat toilet effectively saves water while meeting cleaning requirements, significantly reducing the water consumption per flush.

[0045] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A large size water-saving negative pressure toilet squatting pan comprising a bowl, the bottom end of the bowl is provided with a sewage outlet, characterized in that, A first arc-shaped inclined surface is arranged between the front end of the toilet bowl and the sewage outlet, and the front end of the toilet bowl is provided with a first water jet nozzle. The first water jet nozzle comprises a water jet nozzle body, an inlet water channel and a plurality of outlet water channels are arranged in the water jet nozzle body, one end of the inlet water channel is in communication with the outside, one end of each of the plurality of outlet water channels is in communication with the other end of the inlet water channel, the sum of the cross-sectional areas of the plurality of outlet water channels is less than the cross-sectional area of the inlet water channel, the plurality of outlet water channels are arranged in a fan shape in sequence, the other end of each of the plurality of outlet water channels is formed with a water outlet, and the plurality of water outlets are arranged along an arc in sequence towards the direction of the sewage outlet. Each of the plurality of water outlets is matched with the first arc-shaped inclined surface, so that the columnar water lines sprayed by each water outlet can diffuse along the surface of the first arc-shaped inclined surface when the columnar water lines contact the first arc-shaped inclined surface. The first water jet nozzle comprises a threaded connecting rod and a columnar boss. One end of the threaded connecting rod is connected with one end of the columnar boss, the inlet water channel is arranged in the threaded connecting rod, the end of the inlet water channel away from the outlet water channel is arranged at the end of the threaded connecting rod away from the columnar boss and is in communication with the outside, the outlet water channel is arranged in the columnar boss, and the end of the outlet water channel away from the inlet water channel is arranged on the side wall of the columnar boss and is in communication with the outside. A plurality of shunt cavities are arranged in the columnar boss, and the inlet water channel and the plurality of shunt cavities are in communication. Among the plurality of outlet water channels, the two side jet channels are located at the two sides, and the main jet channels are located between the two side jet channels. Each of the two side jet channels is in communication with one of the shunt cavities, and each of the main jet channels is in one-to-one communication with another shunt cavity.

2. The large size water-saving negative pressure toilet squatting pan according to claim 1, characterized in that, The cross-sectional area of the outlet water channel becomes wider from the end close to the inlet water channel.

3. The large size water-saving negative pressure toilet squatting pan according to claim 1, characterized in that, The cross section of the outlet water channel is in an elliptical shape.

4. The large size water-saving negative pressure toilet squatting pan according to claim 1, characterized in that, The main jet channels are five, which are a central main jet channel, two first main jet channels and two second main jet channels. The axis of the central main jet channel is arranged in the same plane as the axis of the sewage outlet, and the two side jet channels, the two first main jet channels and the two second main jet channels are symmetrically arranged on both sides of the central main jet channel.

5. The large-size water-saving negative pressure toilet squatting pan according to claim 4, wherein In the horizontal plane projection direction, the included angle between the central main jet channel and the first main jet channel is 20 degrees, the included angle between the central main jet channel and the second main jet channel is 38 degrees, and the included angle between the central main jet channel and the side jet channel is 78 degrees. In the vertical plane projection direction, the included angle between the central main jet channel and the first main jet channel is 4 degrees, the included angle between the central main jet channel and the second main jet channel is 21 degrees, and the included angle between the central main jet channel and the side jet channel is 29 degrees.

6. A large size water-saving negative pressure toilet bowl according to any one of claims 1 to 5, characterized in that, The second arc-shaped inclined surface is arranged between the rear end of the toilet bowl and the sewage outlet, and the rear end of the toilet bowl is provided with a second water jet nozzle which has the same structure as the first water jet nozzle, and the water outlets of the second water jet nozzle are matched with the second arc-shaped inclined surface so that the water column sprayed by the water outlets can spread along the surface of the second arc-shaped inclined surface.

7. A large size water-saving negative pressure toilet squatting pan according to claim 6, characterized in that, The inclination angle of the first arc-shaped inclined surface is substantially 20 degrees, and the inclination angle of the second arc-shaped inclined surface is substantially 60 degrees.

Images