Nozzle and pedestal pan with same

Abstract

The utility model belongs to the technical field of pedestal pans, and particularly relates to a nozzle and a pedestal pan with the same. The shell comprises a fluid inlet section and a fluid outlet section; the fluid inlet section is internally provided with cylindrical channels which extend in the axial direction and are equal in diameter. The fluid outlet section is provided with a conical diffusion channel coaxially communicated with the cylindrical channel, and the conical diffusion channel is provided with a small-diameter end close to the fluid inlet section and a large-diameter end far away from the fluid inlet section; and the inner diameter of the small-diameter end is larger than that of the cylindrical channel, so that an annular boss is formed at the joint of the conical diffusion channel and the cylindrical channel. The nozzle consumes kinetic energy through the sudden expansion structure and is matched with the conical diffusion channel to control flow separation, energy dissipation and pressure recovery are cooperatively achieved, and the flushing effect is guaranteed while splashing prevention is achieved; in addition, the cylindrical channel provides a stable fluid inlet, turbulent flow is reduced, the scouring area is enlarged through the conical diffusion design of the fluid outlet section, and the cleaning efficiency is improved to a certain degree.

Description

Technical Field

[0001] This utility model belongs to the field of toilet technology, and in particular relates to a nozzle and a toilet with the nozzle. Background Technology

[0002] With the development of sanitary ware technology, improving the flushing effect of toilets has always been a key focus of the industry. Traditional toilet nozzles, such as the utility model patent CN205242556U entitled "A Toilet Main Flush Nozzle," describe a nozzle that is divided into a larger inner diameter pipe section, a transition pipe section, and a smaller inner diameter pipe section arranged in a continuous manner along the water flow direction. The transition pipe section connects the larger and smaller inner diameter pipe sections, and its inner diameter gradually decreases along the water flow direction. This allows the water flow to reach the nozzle outlet at a faster speed and to straighten the water head, providing greater jet force to further improve the toilet flushing effect.

[0003] It is known that this nozzle accelerates the water flow through a gradually changing inner diameter design (larger inner diameter pipe section → transition pipe section → smaller inner diameter pipe section), forming a high-speed jet to enhance flushing power. However, this design has a significant drawback: when the high-speed jet directly impacts the inner wall of the toilet bowl, the excessive fluid kinetic energy causes liquid splashing, and sewage easily splashes onto the inner edge of the top of the toilet bowl or even the outside, which is not only unhygienic but also increases the difficulty of cleaning, affecting the user experience.

[0004] In existing technologies, to solve the technical problem of liquid splashing from nozzles, a flow restrictor 5 is typically installed at the nozzle inlet, such as... Figure 3 As shown, a flow restrictor 5 can be installed at the inlet of the nozzle mounting hole. While the flow restrictor 5 effectively solves the splashing problem, it significantly reduces the flushing flow rate, negatively impacting the toilet's flushing performance. To ensure proper flushing, toilets with this flow restrictor 5 require adjustments to the parameters of the matching water pump, increasing the complexity of system operation.

[0005] Therefore, this utility model provides a novel nozzle and a toilet with the nozzle to overcome the above-mentioned defects. Utility Model Content

[0006] One objective of this invention is to provide a nozzle that dissipates kinetic energy through a sudden expansion structure and controls flow separation through a conical diffusion channel, thereby achieving energy dissipation and pressure recovery, thus preventing splashing while ensuring rinsing effect. In addition, the cylindrical channel provides a stable fluid inlet, reducing turbulence, and the conical diffusion design at the fluid outlet section expands the rinsing area, which also improves cleaning efficiency to a certain extent.

[0007] The present invention adopts the following technical solution: a nozzle, which includes a fluid inlet section and a fluid outlet section;

[0008] The fluid inlet section has an axially extending cylindrical channel of equal diameter inside.

[0009] The fluid outlet section is provided with a conical diffusion channel coaxially connected to the cylindrical channel. The conical diffusion channel has a small-diameter end near the fluid inlet section and a large-diameter end away from the fluid inlet section. The inner diameter of the small-diameter end is larger than the inner diameter of the cylindrical channel, so as to form an annular protrusion at the junction of the conical diffusion channel and the cylindrical channel.

[0010] Furthermore, the cone angle α of the cone-shaped diffusion channel is 8° to 15°.

[0011] Furthermore, the ratio of the radial thickness of the annular boss to the radial diameter of the cylindrical channel is (2-3):(15-17).

[0012] Furthermore, the axial length ratio of the conical diffusion channel to the cylindrical channel is (10-17):1.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] In this invention, during operation, fluid enters the conical diffusion channel from the cylindrical channel. Because the inner diameter of the smaller diameter end is greater than the inner diameter of the cylindrical channel, a sudden expansion annular protrusion (i.e., a geometric abrupt change zone) is formed. This sudden expansion structure causes a rapid increase in the flow cross-sectional area, leading to a sudden drop in fluid velocity, triggering boundary layer separation, forming vortices and low-velocity regions, increasing the local drag coefficient, consuming fluid kinetic energy, thereby reducing the velocity in the jet core region and minimizing liquid splashing.

[0015] Meanwhile, the tapered diffusion channel, through its gradually expanding cross-sectional area, reduces the fluid velocity gradient and allows for gradual pressure recovery, preventing flow separation caused by sudden velocity drops, thereby reducing energy loss and further suppressing splashing. Therefore, this nozzle, through its abrupt expansion structure to dissipate kinetic energy and the tapered diffusion channel to control flow separation, synergistically achieves energy dissipation and pressure recovery, ensuring both splash prevention and effective flushing and drainage.

[0016] Furthermore, the nozzle structure of this utility model eliminates the design of the flow restrictor 5, which not only simplifies the overall structure and production process, but also effectively reduces the manufacturing cost.

[0017] Another object of this invention is a toilet that includes the aforementioned nozzle. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the nozzle structure in a specific embodiment of the present invention;

[0020] Figure 2 This is a flow velocity distribution diagram after nozzle simulation analysis in a specific embodiment of this utility model;

[0021] Figure 3 A schematic diagram of a conventional nozzle with a flow restrictor at the nozzle inlet;

[0022] The components include: fluid inlet section 1, cylindrical channel 10; fluid outlet section 2, conical diffusion channel 20, small diameter end 21, large diameter end 22, first step 23, second step 24, sealing ring groove 25, third step 26, external thread 27, annular flange 28, chamfer 29; annular boss 3; annular groove 4; and flow restrictor 5. Detailed Implementation

[0023] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] The following is in conjunction with the appendix Figure 1 To be continued Figure 2 The present invention will be described in detail with reference to specific embodiments:

[0025] like Figure 1 As shown, this utility model provides a nozzle, which includes a fluid inlet section 1 and a fluid outlet section 2, wherein fluid flows in from the fluid inlet section 1 and flows out from the fluid outlet section 2.

[0026] The fluid inlet section 1 has an axially extending cylindrical channel 10 of equal diameter inside, providing a stable fluid inlet.

[0027] The fluid outlet section 2 is provided with a conical diffusion channel 20 coaxially connected to the cylindrical channel 10. The conical diffusion channel 20 has a small-diameter end 21 near the fluid inlet section 1 and a large-diameter end 22 away from the fluid inlet section 1. The inner diameter of the small-diameter end 21 is larger than the inner diameter of the cylindrical channel 10, so that an annular protrusion 3 is formed at the junction of the conical diffusion channel 20 and the cylindrical channel 10.

[0028] In this invention, during operation, fluid enters the conical diffusion channel 21 from the cylindrical channel 10. Because the inner diameter of the smaller diameter end 21 is greater than the inner diameter of the cylindrical channel 10, a sudden expansion annular protrusion 3 (i.e., a geometric abrupt change zone) is formed. This sudden expansion structure causes a sharp increase in the flow cross-sectional area, which leads to a sudden drop in fluid velocity, triggering boundary layer separation, forming vortices and low-velocity regions, increasing the local drag coefficient, consuming fluid kinetic energy, thereby reducing the velocity in the jet core region and reducing liquid splashing.

[0029] Meanwhile, the tapered diffusion channel 20, through its gradually expanding cross-sectional area, reduces the fluid velocity gradient and allows for gradual pressure recovery, preventing flow separation caused by a sudden drop in velocity, thereby reducing energy loss and further suppressing splashing. Therefore, this nozzle, through its abrupt expansion structure to dissipate kinetic energy and the tapered diffusion channel 20 to control flow separation, synergistically achieves energy dissipation and pressure recovery, ensuring both splash prevention and effective flushing and drainage.

[0030] Furthermore, the nozzle structure of this utility model eliminates the design of the flow restrictor 5, which not only simplifies the overall structure and production process, but also effectively reduces the manufacturing cost.

[0031] Furthermore, in this embodiment, the specific dimensions of the nozzle are designed as follows:

[0032] The cone angle α of the conical diffusion channel 20 is 8° to 15°. This cone angle range can form a moderate adverse pressure gradient during the expansion of the cross-sectional area, which avoids the reduction of diffusion efficiency due to the angle being too small, and prevents violent flow separation caused by the angle being too large. This achieves a better balance between splash suppression and cleaning efficiency, that is, maintaining scouring performance while suppressing splash.

[0033] The radial thickness (also known as wall thickness) of the annular protrusion 3 is in the ratio of (2-3) to (15-17) of the radial diameter of the cylindrical channel 10, balancing kinetic energy dissipation and flow channel unobstructedness, suppressing splashing while maintaining scouring force. The axial length ratio of the conical diffusion channel 20 to the cylindrical channel 10 is (10-17) to 1.

[0034] The specific parameter ratios (cone angle 8°~15°, radial thickness ratio (2~3): (15~17), length ratio (10~17): 1) have been verified through numerical simulation and experiments. They significantly reduce the amount of splashing while maintaining high-efficiency cleaning performance, thus achieving the optimal balance between splash suppression and scouring coverage area.

[0035] In this embodiment, a nozzle with a radial thickness of 1.5 mm for the annular boss 3 was used for simulation experiment analysis, and its flow velocity analysis diagram is shown below. Figure 2 As shown, it is clear that boundary layer separation is triggered at the annular protrusion 3, forming a low-velocity region and increasing resistance.

[0036] Furthermore, in some specific embodiments, the outer wall surface of the fluid inlet section 1 is a cylindrical surface of equal diameter.

[0037] The outer wall of the fluid outlet section 2 forms a stepped variable diameter structure, including a first step 23, a second step 24, ..., an Nth step connected sequentially along the axial direction, where N is a positive integer ≥ 2, and the outer diameter of the first step 23, the second step 24, ..., the Nth step gradually increases. The stepped variable diameter structure facilitates precise positioning and installation, thereby improving the stability of the entire structure.

[0038] Meanwhile, the first step 23 is connected to the cylindrical surface of equal diameter. A sealing ring groove 25, arranged circumferentially around the nozzle, is formed on the outer wall of the first step 23 of the stepped variable diameter structure; the sealing ring groove 25 is used to place the sealing ring.

[0039] In this embodiment, N is 3, that is, the outer wall surface of the fluid outlet section 2 includes a first step 23, a second step 24 and a third step 26.

[0040] The first step 23 is used to connect to a multi-way valve to control the water inlet at the nozzle. Correspondingly, multiple spaced-apart sealing ring slots 25 are provided on the first step 23 to hold sealing rings and enhance the sealing performance of external connections.

[0041] An annular groove 4 is provided on the outer wall surface of the second step 24 along the circumference of the nozzle. The annular groove 4 is used to place a locking and limiting ring, which can realize the axial limiting of the multi-way valve, etc.

[0042] Specifically, an external thread 27 is formed on the third step 26. This external thread is used to connect with the internal thread of the locking nut. During installation, the nozzle is inserted into the mounting hole of the toilet body from the fluid inlet section 1, and a locking nut is fitted onto the external thread 27. The locking nut abuts against the inner wall of the mounting hole of the toilet body, thereby achieving a locking connection between the nozzle and the toilet body. The external thread facilitates nozzle installation and increases connection stability.

[0043] Simultaneously, an annular flange 28 can be formed on the outer wall surface of the Nth step away from the cylindrical surface of equal diameter, serving as a positioning element to ensure accurate nozzle insertion depth. During use, a sealing gasket can be placed between the annular flange 28 and the outer wall surface at the periphery of the toilet body mounting hole to increase sealing during installation.

[0044] More specifically, the joints of the equal-diameter cylindrical surfaces, the first step 23, the second step 24... the Nth step are chamfered 29, which facilitates the insertion and installation of the nozzle.

[0045] Based on the aforementioned nozzle, this utility model also provides a toilet seat that includes the aforementioned nozzle. This toilet seat incorporates at least all the technical solutions of the nozzle and possesses at least all the advantages of the nozzle, which will not be elaborated further here.

[0046] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the substance and scope of the present invention. Various modifications made by those skilled in the art to the above embodiments after reading this specification are all within the scope of protection of the present invention.

Claims

1. A nozzle, characterized in that: It includes a fluid inlet section and a fluid outlet section; The fluid inlet section has an axially extending cylindrical channel of equal diameter inside. The fluid outlet section is provided with a conical diffusion channel coaxially connected to the cylindrical channel. The conical diffusion channel has a small-diameter end near the fluid inlet section and a large-diameter end away from the fluid inlet section. The inner diameter of the small-diameter end is larger than the inner diameter of the cylindrical channel, so as to form an annular protrusion at the junction of the conical diffusion channel and the cylindrical channel.

2. The nozzle according to claim 1, characterized in that: The cone angle α of the cone-shaped diffusion channel is 8° to 15°.

3. The nozzle according to claim 1, characterized in that: The ratio of the radial thickness of the annular boss to the radial diameter of the cylindrical channel is (2-3):(15-17).

4. The nozzle according to claim 1, characterized in that: The ratio of the axial length of the conical diffusion channel to that of the cylindrical channel is (10-17):

1.

5. A toilet seat, characterized in that: Includes the nozzle described in any one of claims 1 to 4.

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