A dishwasher nozzle

Abstract

The utility model provides a kind of dishwasher nozzle, including a nozzle main body, the water flow passage is arranged in nozzle main body, the outlet of water flow passage is a water outlet hole, the projection of water outlet hole in along nozzle axis direction is rectangle;Water flow passage in the region close to water outlet hole, in its cross section view along nozzle axis direction, opposite two sides inner wall has preset inclination angle, so that the cross-sectional area of water flow passage gradually increases along water flow direction, forms fan-shaped flow guide area, the water of ejection can reach each corner and the tableware surface of different height in dishwasher, reduces the unavoidable washing "dead angle" of traditional nozzle, to improve washing efficiency and the overall cleanliness of tableware;Moreover, fan-shaped flow guide area can reduce the disorder turbulence and energy dissipation of water flow when leaving nozzle, so that the pressure energy provided by water pump is more effectively converted into kinetic energy and potential energy of lateral diffusion of water flow, instead of waste in vain internal turbulence.

Description

Technical Field

[0001] This utility model relates to the field of dishwasher technology, specifically to a dishwasher nozzle. Background Technology

[0002] Traditional dishwasher nozzles typically use round or simple rectangular water outlets with a relatively crude internal water flow channel design. This results in uneven water coverage within the washing chamber, leaving some surfaces or deep areas of dishes uncleaned and requiring repeated washing or manual pre-treatment, thus reducing dishwasher efficiency and user experience. Furthermore, this simple outlet shape and internal channel design prevents effective water flow guidance and shaping before spraying, leading to turbulent water flow. Energy is dissipated in unnecessary turbulence and diffusion, reducing the impact on stains and failing to fully utilize water pressure for effective cleaning.

[0003] Therefore, there is an urgent need for a new type of dishwasher nozzle that can overcome the shortcomings of existing technologies and improve washing efficiency and cleanliness. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model proposes a dishwasher nozzle that aims to solve the technical problems of uneven water flow coverage and low energy utilization in existing dishwasher nozzles, thereby improving washing efficiency and cleanliness.

[0005] The technical solution of this utility model is implemented as follows: A dishwasher nozzle includes a nozzle body, a water flow channel inside the nozzle body, and a water outlet hole at the outlet of the water flow channel. The projection of the water outlet hole along the nozzle axis is rectangular. In the area near the outlet, the water flow channel has a preset inclination angle on its two inner walls in a cross-sectional view along the nozzle axis, which makes the cross-sectional area of ​​the water flow channel gradually increase along the water flow direction, forming a fan-shaped guide area.

[0006] Preferably, the water outlet is formed on the spherical outer surface at the front end of the nozzle body.

[0007] Preferably, the water outlet has a preset length and a preset width, and the setting of the length and width determines the spray angle and spray height of the nozzle.

[0008] Preferably, the water flow channel includes a first-stage inlet section, a second-stage contraction section, a third-stage transition section, a fourth-stage hemispherical section, and a fan-shaped guide area connected in sequence; In the primary intake section and the tertiary transition section, the flow path of the primary intake section is longer than that of the tertiary transition section, and the diameter of the primary intake section is larger than that of the tertiary transition section.

[0009] Preferably, the cross-section of the primary water inlet section is circular, and the primary water inlet section has a preset diameter and a preset axial length. The setting of the diameter and axial length determines the spray angle and spray height of the nozzle.

[0010] Preferably, the cross-section of the secondary contraction section along the nozzle axis is trapezoidal.

[0011] Preferably, the cross-section of the third-stage transition section along the nozzle axis is rectangular.

[0012] Preferably, in another lateral dimension of the cross-sectional view perpendicular to the axis, the inner walls on both sides of the fan-shaped flow guiding area also have a preset inclination angle, so that the cross-sectional area of ​​the water flow channel gradually increases along the water flow direction in this dimension.

[0013] Preferably, the nozzle body is made of plastic or metal.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. The projection of the water outlet along the nozzle axis is designed as a rectangle, which provides a prerequisite for the lateral expansion of the water flow. The flow channel is provided with a fan-shaped guide area near the water outlet. The inner wall of this area has a preset inclination angle, and the cross-sectional area gradually increases along the water flow direction, forming a gradually expanding structure. This ensures that the water flow forms a stable, uniform, and wide-coverage fan shape when it leaves the nozzle. The sprayed water can reach all corners inside the dishwasher and the surface of tableware at different heights, reducing the washing "dead corners" that are difficult to avoid with traditional nozzles, thereby improving washing efficiency and the overall cleanliness of the tableware.

[0015] 2. The design of the fan-shaped flow guide area can reduce the disordered turbulence and energy dissipation of the water flow when it leaves the nozzle, so that the pressure energy provided by the water pump can be more effectively converted into the kinetic energy and lateral diffusion potential energy of the water flow, rather than being wasted in unnecessary internal turbulence. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a top view of the present invention.

[0017] Attached image labels: 1- Nozzle body; 11- Water flow channel; 111- Primary water inlet section; 112- Secondary contraction section; 113- Tertiary transition section; 114- Quaternary hemispherical section; 115- Fan-shaped guide area; 12- Water outlet; 13- Spherical outer surface. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] See Figure 1 and Figure 2 This utility model provides a dishwasher nozzle, including a nozzle body 1. The nozzle body 1 has a water flow channel 11 inside, and the outlet of the water flow channel 11 is a water outlet 12. The projection of the water outlet 12 along the nozzle axis is rectangular. Here, rectangular projection means that when viewed from directly in front of the nozzle in the water outlet direction, the outer contour shape of the water outlet is rectangular (e.g., ...). Figure 3 ); The water flow channel 11 forms a fan-shaped guide region 115 near the outlet hole 12. In a cross-sectional view along the nozzle axis, the inner walls of the opposite sides of the fan-shaped guide region 115 have a preset inclination angle, and the opposite inner walls are at... Figure 2 The middle section consists of the top and bottom sides, with a preset tilt angle at... Figure 2 The term 'a' represents the cross-sectional area of ​​the water flow channel 11, which gradually increases along the water flow direction. When water flows through this area, it is guided and expanded, forming an unfolding fan-shaped water curtain upon ejection. This structure effectively converts the incoming columnar water flow into a fan-shaped flow with a specific angle and height, improving the coverage efficiency and impact effect of the water flow. The preset tilt angle 'a' can be selected from 5° to 25°.

[0021] Compared to the traditional circular water outlet 12, the projection of the water outlet 12 along the nozzle axis is designed as rectangular, fundamentally changing the initial geometry of the water flow leaving the nozzle. This rectangular opening provides a wider outlet in the lateral direction, providing a prerequisite for the lateral expansion of the water flow. This allows the water flow to occupy a wider lateral space than a circular nozzle the moment it leaves the nozzle, laying a solid foundation for the subsequent formation of a broad water curtain. A fan-shaped guiding region 115 is provided in the flow channel near the water outlet 12. The inner wall of this region has a preset inclination angle, and its cross-sectional area gradually increases along the water flow direction, forming a gradually expanding structure. When the high-pressure water flow passes through this region, it is forcibly guided and expanded by these inclination inner walls. This internal, purposeful guiding mechanism can efficiently transform the initial concentrated water flow into a flat fan-shaped water curtain with a specific diffusion angle. This orderly diffusion from the inside out ensures that the water flow forms a stable, uniform, and wide-coverage fan shape as soon as it leaves the nozzle, reaching every corner of the dishwasher and the surface of tableware at different heights. This reduces the washing "dead corners" that are difficult to avoid with traditional nozzles, improving washing efficiency and the overall cleanliness of the tableware.

[0022] In addition, the design of the fan-shaped guide area 115 allows the water flow to undergo an orderly diffusion process controlled by the internal structure before it is ejected. This orderliness reduces the disordered turbulence and energy dissipation of the water flow when it leaves the nozzle, so that the pressure energy provided by the water pump is more effectively converted into the kinetic energy and lateral diffusion potential energy of the water flow, rather than being wasted in unnecessary internal turbulence.

[0023] In fact, the fan-shaped guide area 115 also has a preset tilt angle on its opposite inner walls in another lateral dimension of the cross-sectional view perpendicular to the axis, causing the cross-sectional area of ​​the water flow channel 11 to gradually increase along the water flow direction in this dimension. This means that the water flow in the fan-shaped guide area 115 diffuses simultaneously in two mutually perpendicular lateral dimensions. This dual-dimensional fan-shaped guide can generate a more uniform, wider-coverage flat fan-shaped water curtain, or, depending on the design, form a rectangular water curtain with a specific aspect ratio, thereby maximizing the coverage of the tableware surface. This design further ensures that tableware in all corners inside the dishwasher can be fully rinsed by the water flow, further reducing washing dead corners and improving washing effect. By precisely controlling the tilt angles in these two dimensions, more refined control of the final water spray pattern can be achieved. For example, a larger tilt angle in one dimension and a smaller tilt angle in the other dimension can form a "flat and tall" fan-shaped water flow; conversely, a "wide and short" fan-shaped water flow can be formed. These tilt angle values ​​can be selected between 5° and 25° depending on the specific spraying requirements.

[0024] Preferably, the water outlet 12 is formed on the spherical outer surface 13 at the front end of the nozzle body 1. Placing the water outlet 12 on the spherical outer surface 13 not only gives the nozzle a more aesthetically pleasing and streamlined appearance, but more importantly, it helps the water flow maintain its initial fan-shaped pattern after leaving the nozzle, reducing turbulence and irregular diffusion caused by edge effects. Furthermore, the spherical surface can guide the airflow to a certain extent, optimizing the jet trajectory.

[0025] Based on this, in order to achieve precise control over the nozzle's spray angle and spray height, the water outlet 12 has a preset length L and a preset width W (see...). Figure 3 The length L and width W are fixed after the nozzle is manufactured, determining its spray angle and spray height. This means that manufacturers can produce nozzles with different spray characteristics by selecting molds for different sizes of water outlet holes 12 to meet the needs of different washing scenarios and dishwasher models, without needing to make dynamic adjustments during dishwasher operation. For example, to obtain a wider spray angle, a water outlet hole 12 with a longer length L can be designed; to obtain a higher spray height, the matching relationship between the width W of the water outlet hole 12 and the water pressure can be adjusted.

[0026] The water flow channel 11 of this invention is not a simple straight pipe, but rather a series of carefully designed fluid guiding structures connected sequentially to achieve gradual shaping of the water flow. Specifically, as... Figure 2 As shown, the water flow channel 11 includes a first-stage inlet section 111, a second-stage contraction section 112, a third-stage transition section 113, a fourth-stage hemispherical section 114, and a fan-shaped guide area 115 connected in sequence. The first-stage inlet section 111 serves as the initial area where water enters the nozzle, and its main function is to receive water from the dishwasher pump body. The second-stage converging section 112, located after the first-stage inlet section 111, is used to initially accelerate and rectify the water flow, reducing turbulence. The third-stage transition section 113 prepares a stable water flow for the subsequent fourth-stage hemispherical section 114 and fan-shaped guide area 115. The fourth-stage hemispherical section 114 provides a buffer and uniform pressure space before the water enters the fan-shaped guide area 115, ensuring that the water can enter the fan-shaped guide area 115 at a more uniform speed and pressure, thereby optimizing the formation of the fan-shaped water flow. Moreover, the hemispherical structure helps to disperse the water flow and provide a relatively stable pressure environment for the water flow. The fan-shaped guide area 115 finally shapes the water flow, causing it to spray out in the desired fan shape.

[0027] It should be noted that when the high-speed, shaped water flow enters the fourth-stage hemispherical section 114 from the third-stage transition section 113, the expansion of the fourth-stage hemispherical section 114 provides a space for deceleration and pressure recovery. Simultaneously, the hemispherical structure allows for a more uniform distribution of velocity and pressure before the water flow enters the fan-shaped guide region 115. This uniformity is crucial for forming a stable, symmetrical fan-shaped water flow with a predetermined angle. Without the fourth-stage hemispherical section 114, the water flow might enter the guide region with uneven velocity and pressure, resulting in an irregular or significantly distorted final fan-shaped water flow that fails to achieve the desired angle and height.

[0028] In the primary inlet section 111 and the tertiary transition section 113, the flow path of the primary inlet section 111 is longer than that of the tertiary transition section 113, and the diameter of the primary inlet section 111 is larger than that of the tertiary transition section 113. The combined effect of the longer flow path and larger diameter of the primary inlet section 111 ensures that the incoming flow to the subsequent secondary contraction section 112 is stable, uniform, and low-turbulence, which is the foundation for all subsequent efficient flow guidance and shaping. If the inlet section is short and narrow, the turbulent water flow will directly impact the subsequent structures, resulting in uncontrollable turbulence and energy loss throughout the entire jetting process.

[0029] The nozzle stabilizes pressure and stores energy in the first-stage inlet section 111; the second-stage contraction section 112 efficiently converts pressure energy into kinetic energy for acceleration; the third-stage transition section 113 maintains kinetic energy and prepares for shape transformation; and the fourth-stage hemispherical section 114 and fan-shaped guide area 115 convert kinetic energy and remaining pressure energy into directional, expanding impact force and a wide coverage area. This allows the nozzle to generate a stronger impact and wider coverage area than traditional nozzles under the same pump power. This four-stage segmented design ensures precise control and guidance of the water flow at every step before ejection, thereby improving the utilization rate of water flow energy and the stability of the spray effect. The above description is only a preferred embodiment of this utility model. It should be understood that the core of this utility model lies in forming a fan-shaped water flow through the cooperation of the guide area and the rectangular outlet hole. Based on this core, those skilled in the art can conceive of other variations or simplifications of the structure, such as omitting the third-level transition segment or the fourth-level hemispherical segment, or changing the specific shape of certain segments. As long as these contain the core technical solution of this utility model, they should all be considered to fall within the protection scope of this utility model.

[0030] Furthermore, the primary water inlet section 111 has a circular cross-section. This circular cross-section is a standard shape that is easy to connect to the internal water supply system of the dishwasher. The primary water inlet section 111 has a preset diameter D and a preset axial length H, similar to the size of the water outlet 12. The setting of the diameter D and axial length H of the primary water inlet section 111 also determines the spray angle and spray height of the nozzle. The diameter D and axial length H of the primary water inlet section 111 mainly affect the initial flow velocity, flow rate, and stability of the water flow after entering the nozzle. A larger diameter or a longer axial length may allow for a larger water flow rate and a more stable initial flow field, thus providing more ideal conditions for the subsequent contraction and guiding areas. A smaller diameter or a shorter axial length may result in faster water flow acceleration or different initial turbulence patterns. These initial conditions affect the overall energy and shape of the water flow after passing through the secondary contraction section 112 and the fourth hemispherical section 114, thereby indirectly affecting the final spray angle and spray height. By selecting primary inlet sections 111 with different diameters D and axial lengths H, macroscopic adjustments to the spray height and angle can be achieved; while the length and width of the outlet holes 12 are then microscopically and ultimately finely shaped. This division of labor makes nozzle design more flexible and controllable.

[0031] Preferably, the cross-section of the secondary contraction section 112 along the nozzle axis is trapezoidal. The trapezoidal cross-section means that the cross-sectional area of ​​this section gradually decreases along the water flow direction, thereby achieving smooth acceleration and rectification of the water flow, reducing energy loss and turbulence generation, and providing a more ideal, high-speed, and stable water flow for subsequent channels. Furthermore, an appropriately long, uniformly shaped straight channel helps reduce potential localized eddies or secondary flows at the outlet of the secondary contraction section 112, ensuring that the water flows into the next section with purer axial momentum.

[0032] Preferably, the cross-section of the third-stage transition section 113 along the nozzle axis is rectangular, and the cross-sectional area of ​​this section remains constant along the water flow direction. After the water flow is accelerated by the second-stage contraction section 112, there may still be a certain degree of turbulence. The third-stage transition section 113, as a stable channel with a constant cross-section, can provide a sufficient length to allow the water flow to further develop in this region, weaken the turbulence intensity, stabilize the flow field, and make its velocity distribution tend to be uniform.

[0033] Preferably, the nozzle body 1 is made of plastic, such as polypropylene, ABS resin, polycarbonate, or polysulfone. Plastic materials have advantages such as low cost, ease of injection molding, corrosion resistance, and light weight, making them ideal for mass production. Alternatively, the nozzle body 1 can be made of metal, such as stainless steel, brass, or aluminum alloy, which offers higher strength, high temperature resistance, and wear resistance, making it suitable for applications with higher requirements for service life and extreme environments. Choosing appropriate materials ensures that the nozzle operates stably for a long time in the high temperature, high humidity, and chemical detergent environment inside the dishwasher.

[0034] The working principle of the dishwasher nozzle of this invention is as follows: The high-pressure water flow generated by the dishwasher pump first enters the primary inlet section 111 of the nozzle. The circular cross-section of the primary inlet section 111 ensures that the water flow can enter smoothly and efficiently. The water flow then passes through the secondary contraction section 112, where the water flow is gradually accelerated and rectified, converting water pressure energy into kinetic energy, while reducing turbulence within the water flow.

[0035] Next, the water flows into the third-stage transition section 113. This section, as a channel with a constant cross-section, has the core function of further stabilizing the flow pattern of the water, reducing the local eddies that may be generated in the first and second-stage contraction sections 112, and avoiding additional energy loss or distortion caused by the unstable flow pattern when the water enters the subsequent complex structure.

[0036] Subsequently, the water flows into the fourth hemispherical section 114, which acts as a buffer and pressure homogenization zone, ensuring that the water achieves a uniform velocity and pressure distribution before entering the fan-shaped guide zone 115. This is crucial for forming a fan-shaped flow and avoids jet distortion caused by uneven flow field.

[0037] Finally, the water flows into the fan-shaped guide region 115. In this region, the inner wall of the water flow channel 11 has a preset inclination angle, causing the cross-sectional area of ​​the channel to gradually increase along the water flow direction in at least one lateral dimension. Guided by these inclined inner walls, the water flow is forced to diffuse outward, thus forming a stable fan-shaped water curtain with a preset spray angle and spray height when it exits the water outlet 12. The water outlet 12 itself is formed on the spherical outer surface 13 at the front end of the nozzle body 1, and its preset length and width further refine the final shape of the water flow.

[0038] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A dishwasher nozzle, characterized in that, It includes a nozzle body, the nozzle body has a water flow channel inside, the outlet of the water flow channel is a water outlet hole, and the projection of the water outlet hole along the direction of the nozzle axis is rectangular; In the area near the water outlet, in a cross-sectional view along the nozzle axis, the inner walls on opposite sides of the water flow channel have a preset inclination angle, causing the cross-sectional area of ​​the water flow channel to gradually increase along the water flow direction, forming a fan-shaped guiding area.

2. The dishwasher nozzle according to claim 1, characterized in that, The water outlet is formed on the spherical outer surface at the front end of the nozzle body.

3. The dishwasher nozzle according to claim 2, characterized in that, The water outlet has a preset length and a preset width, and the setting of the length and width determines the spray angle and spray height of the nozzle.

4. The dishwasher nozzle according to claim 2, characterized in that, The water flow channel includes a first-stage inlet section, a second-stage contraction section, a third-stage transition section, a fourth-stage hemispherical section, and the fan-shaped guide area connected in sequence. In the primary inlet section and the tertiary transition section, the flow path of the primary inlet section is longer than that of the tertiary transition section, and the diameter of the primary inlet section is larger than that of the tertiary transition section.

5. The dishwasher nozzle according to claim 4, characterized in that, The cross-section of the primary water inlet section is circular. The primary water inlet section has a preset diameter and a preset axial length. The setting of the diameter and axial length determines the spray angle and spray height of the nozzle.

6. The dishwasher nozzle according to claim 4, characterized in that, The cross-section of the secondary contraction section along the nozzle axis is trapezoidal.

7. The dishwasher nozzle according to claim 4, characterized in that, The cross-section of the third-stage transition section along the nozzle axis is rectangular.

8. The dishwasher nozzle according to claim 1, characterized in that, In another lateral dimension of the cross-sectional view perpendicular to the axis, the inner walls of the fan-shaped flow guiding area also have a preset inclination angle, so that the cross-sectional area of ​​the water flow channel gradually increases along the water flow direction in this dimension.

9. The dishwasher nozzle according to claim 1, characterized in that, The nozzle body is made of plastic or metal.

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