A nozzle and a dishwasher

Abstract

The application discloses a nozzle and a dish washing machine. The nozzle is internally provided with a flow channel, a fluid pressurizing structure is arranged in the middle of the flow channel, a gas guiding structure is arranged on the nozzle downstream of the fluid pressurizing structure and is communicated with the flow channel, gas is introduced into the nozzle through the gas guiding structure, water flow sprayed in the nozzle is mixed with the gas, bubbles are generated in the water flow, the bubbles are broken when contacting tableware, stubborn stains can be washed powerfully, and the cleaning effect is enhanced. The application further provides the dish washing machine, which comprises a spraying arm, a water spraying hole is arranged on the spraying arm, and the spraying arm is further provided with the nozzle, and a water inlet of the nozzle is communicated with the water spraying hole.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of dishwashers, in particular, relates to a nozzle and a dishwasher. BACKGROUND

[0002] A household dishwasher is a kind of intelligent electric ball suitable for ordinary families and capable of replacing manual dish washing. Generally, the water pump of the dishwasher circulates water to each spray arm, the spray arm sprays high-temperature and high-pressure water flow while rotating, and the dishes in the sink are washed and cleaned in all directions, and the comprehensive effects of wetting, decomposition, soaking and swelling are added to achieve the dual effects of cleaning and sterilization.

[0003] The dishwasher of the above-mentioned various forms generally lifts water by a water pump and sprays it to the dishes in the washing space to achieve the washing effect, but the water flow impact force sprayed to the dishes is weak, when the stains on the dishes are stubborn, the weak water flow impact force cannot effectively clean the stains on the dishes, resulting in poor cleaning effect. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the deficiency of weak water flow impact force in the prior art, and to provide a nozzle and a dishwasher.

[0005] To solve the above-mentioned technical problem, the basic idea of the technical scheme adopted by the present application is:

[0006] According to one aspect of the present application, a nozzle is provided, the nozzle is provided with a flow channel, a fluid pressurizing structure is arranged in the middle of the flow channel, and a gas guiding structure is arranged on the nozzle downstream of the fluid pressurizing structure and in communication with the flow channel.

[0007] Further, the fluid pressurizing structure comprises a conical spray pipe, the radial dimension of the spray pipe gradually decreases along the flow direction of the fluid; the outer peripheral wall of the large end of the spray pipe is arranged close to the inner peripheral wall of the flow channel, and the gas guiding structure is arranged downstream of the end face of the small end of the spray pipe.

[0008] Further, the gas guiding structure comprises a plurality of gas guiding ports arranged on the nozzle wall, and any gas guiding port is arranged downstream of the end face of the small end of the spray pipe.

[0009] Further, the plurality of gas guiding ports are uniformly distributed on the nozzle wall along the circumference of the flow channel to form a circle of gas guiding units, and a plurality of circles of gas guiding units are arranged on the nozzle wall along the flow direction of the fluid.

[0010] Further, the gas guiding structure further comprises a plurality of gas guiding pipes corresponding to the gas guiding ports one by one, and each gas guiding pipe is in communication with the inside of the flow channel through the corresponding gas guiding port.

[0011] Preferably, each gas guiding pipe is coaxially arranged with the corresponding gas guiding port.

[0012] Further, the inner wall of the spray pipe is provided with a plurality of reinforcing ribs.

[0013] Further, the reinforcing ribs are in strip shape, and extend from the large end to the small end of the spray pipe, and the radial dimension of the reinforcing ribs gradually decreases.

[0014] Preferably, the plurality of reinforcing ribs are evenly distributed on the inner wall of the spray pipe along the circumferential direction of the spray pipe.

[0015] Further preferably, the outer side of the reinforcing rib is an arc surface matched with the inner wall of the spray pipe, and the inner side opposite to the outer side is a plane.

[0016] Further, the water outlet of the flow channel is provided with a cover or a cover opening the water outlet of the flow channel.

[0017] Further, the outer wall of the nozzle is provided with external threads arranged along the circumferential direction of the nozzle, the inner wall of the cover is provided with internal threads arranged along the circumferential direction of the cover, and the cover and the nozzle are screwed through the internal and external threads.

[0018] The application also provides a dishwasher comprising a spray arm provided with a water spraying hole and a nozzle according to the above technical solution, wherein the water inlet of the nozzle is communicated with the water spraying hole.

[0019] Preferably, the nozzle is integrally formed with the spray arm, or the nozzle is detachably mounted on the spray arm.

[0020] Compared with the prior art, the application has the following beneficial effects.

[0021] 1. The nozzle provided by the application is internally provided with a flow channel, the middle part of the flow channel is provided with a fluid pressurizing structure, the nozzle is provided with a gas guiding structure downstream of the fluid pressurizing structure and communicated with the flow channel, the gas guiding structure allows gas to enter the flow channel and guide the gas into the flow channel, the fluid sprayed from the fluid pressurizing structure mixes with the gas entering the flow channel, the water flow generates bubbles, and the bubbles are sprayed to contact the tableware and then burst, thereby increasing the impact force of the fluid and playing a strong washing role on stubborn stains and enhancing the cleaning effect.

[0022] 2. The gas guiding structure provided by the application comprises a gas guiding hole arranged on the nozzle wall, and any gas guiding hole is located downstream of the end face of the small end of the spray pipe, so that the dynamic gas flow entering the nozzle mixes with the dynamic water flow sprayed from the spray pipe, the water flow is dispersed, the water flow generates bubbles, and the bubbles are sprayed to contact the tableware and then burst.

[0023] 3. The gas guiding structure provided by the application further comprises a gas guiding pipe communicated with the gas guiding hole, the gas flow enters the nozzle through the gas guiding hole, and the gas guiding pipe has a guiding effect on the gas flow.

[0024] 4. The fluid pressurizing structure provided by the present application comprises a spray pipe in a conical shape, the radial dimension of the spray pipe gradually decreases along the flow direction of the fluid, which can increase the flow rate of the fluid when the fluid is sprayed from the spray pipe, and further enable the fluid to have a greater impact force.

[0025] 5. The inner wall of the spray pipe is provided with a plurality of reinforcing ribs, which can enhance the strength of the inner wall of the spray pipe and reduce the damage degree of the water flow to the spray pipe.

[0026] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings are part of the present application and serve to provide a further understanding of the present application, the schematic embodiments of the present application and the descriptions thereof serve to explain the present application, but do not constitute an improper limitation on the present application. Obviously, the drawings described below are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0028] Figure 1 is a structure schematic view of a nozzle in a dish washing machine provided by an embodiment of the present application;

[0029] Figure 2 is a structure schematic view of a nozzle in a dish washing machine provided by an embodiment of the present application;

[0030] Figure 3 is a structure schematic view of a nozzle in a dish washing machine provided by an embodiment of the present application;

[0031] Figure 4 is a structure schematic view of a dish washing machine provided by an embodiment of the present application.

[0032] In the drawings: 1 - spray arm; 2 - nozzle; 21 - flow channel; 211 - water inlet; 212 - water outlet; 213 - external thread; 22 - spray pipe; 23 - air guide structure; 231 - air guide opening; 232 - air guide pipe; 4 - reinforcing rib; 5 - cover.

[0033] It should be noted that these drawings and written descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments will be described clearly and completely below with reference to the drawings of the embodiments of the present application, and the following embodiments are used to illustrate the present application, but not to limit the scope of the present application.

[0035] In the description of the present application, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0036] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] Embodiment

[0038] As Figure 1 and Figure 2 shown, an aspect of the present application provides a nozzle, the nozzle 2 is provided with a flow channel 21, a fluid pressurizing structure is arranged in the middle of the flow channel 21, and a gas guiding structure 23 is arranged on the nozzle 2 downstream of the fluid pressurizing structure and in communication with the flow channel 21.

[0039] In the embodiment of the present application, the fluid pressurizing structure is arranged in the middle of the flow channel 21, the fluid pressurizing structure pressurizes and sprays the fluid flowing through the flow channel 21, the gas guiding structure 23 is arranged on the nozzle 2, which allows gas to enter the flow channel 21 and guide gas into the flow channel 21, the fluid sprayed from the fluid pressurizing structure mixes with the gas entering the flow channel 21, bubbles are generated in the water flow, the bubbles burst when they contact the tableware, which increases the impact force of the fluid and has a strong washing effect on stubborn stains, thereby enhancing the cleaning effect.

[0040] The flow channel 21 has a water inlet 211 and a water outlet 212, the fluid enters the flow channel 21 from the water inlet 211, and the fluid is pressurized and sprayed by the fluid pressurizing structure arranged in the middle of the flow channel 21. Since the fluid pressurizing structure is arranged in the middle of the flow channel 21, there is still a section of the flow channel 21 between the fluid pressurizing structure and the water outlet 212, and the gas guiding structure 23 is arranged on the nozzle 2 and communicates with this section of the flow channel 21. Therefore, the fluid sprayed from the fluid pressurizing structure mixes with the gas introduced by the gas guiding structure 23, and then is sprayed from the water outlet 212 of the flow channel 21.

[0041] It should be noted that the upstream and downstream of the fluid pressurizing structure are according to the flow direction of the fluid, the fluid enters the upstream, and the fluid flows out of the downstream, and the fluid can be water or other fluid.

[0042] As Figure 2 shown in the embodiment of the present application, the fluid pressurizing structure comprises a conical spray pipe 22, the radial dimension of the spray pipe 22 gradually decreases along the flow direction of the fluid; the outer peripheral wall at the large end of the spray pipe 22 is arranged close to the inner peripheral wall of the flow channel 21, and the gas guiding structure 23 is located downstream of the end face of the small end of the spray pipe 22.

[0043] In the embodiment of the present application, the flow direction of the fluid is the direction from the water inlet 211 to the water outlet 212 of the flow channel 21, and the radial dimension of the spray pipe 22 gradually decreases along the flow direction of the fluid, which can increase the flow rate of the fluid when sprayed from the spray pipe 22, and further enable the fluid to have a larger impact force;

[0044] The outer peripheral wall at the large end of the spray pipe 22 is arranged close to the inner peripheral wall of the flow channel 21, so that the fluid entering the flow channel 21 can be sprayed out from the spray pipe 22, and the end face of the small end of the spray pipe 22 is the most downstream of the spray pipe 22, in order to enable the fluid sprayed from the spray pipe 22 to mix with the gas, therefore, the gas guiding structure 23 is located downstream of the end face of the small end of the spray pipe 22; the bottom of the spray pipe 22 is arranged around the inner peripheral wall of the flow channel 21 at a certain height, the spray pipe 22 extends inside the flow channel 21 to a certain height of the flow channel 21, and the gas guiding port 231 is arranged on the nozzle wall above the height of the spray pipe 22;

[0045] The flow channel 21 is a hollow cylinder with two open ends, one open end is a water inlet 211 which is communicated with and matched with the spray hole of the spray arm 1 in the dishwasher, and the other open end is a water outlet 212 which is communicated with the spray pipe 22, the water flow in the spray arm 1 enters the spray pipe 22 through the water inlet 211, and is sprayed out from the spray pipe 22 and sprayed onto the tableware through the water outlet 212.

[0046] As Figure 1 shown in the embodiment of the present application, the gas guiding structure 23 comprises a plurality of gas guiding ports 231 arranged on the nozzle wall, and any gas guiding port 231 is located downstream of the end face of the small end of the spray pipe 22.

[0047] In the embodiment of the present application, the gas guiding structure 23 comprises a plurality of gas guiding ports 231, and the gas guiding ports 231 are arranged on the spray arm 1; during the spraying process, the spray arm 1 rotates, the rotation of the spray arm 1 drives the rotation of the gas guiding ports 231, the gas guiding ports 231 allow the dynamic gas flow to enter the flow channel 21, the dynamic gas flow in the nozzle 2 mixes with the dynamic water flow sprayed out from the spray pipe 22, disperses the water flow, and makes the water flow generate bubbles, and the bubbles are broken when sprayed out and contact the tableware;

[0048] The air guide holes 231 are distributed on the nozzle wall, as long as they can contact the water flow sprayed from the spray pipe 22, so as to mix with the water flow;

[0049] In addition, part of the water flow sprayed from the spray pipe 22 is also sprayed from the air guide holes 231, which increases the dimension of the direction of the water flow sprayed, improves the spray range of the nozzle 2, and enhances the washing effect; the air guide hole 231 is a circular hole, and the inner wall of the circular hole is relatively smooth, which can reduce the friction resistance to the sprayed water flow.

[0050] As shown in Figure 1 In the embodiment of the present application, a plurality of air guide holes 231 are uniformly distributed along the circumference of the flow channel 21 on the nozzle wall to form a ring of air guide units, and a plurality of rings of air guide units are arranged along the flow direction of the fluid on the nozzle wall.

[0051] In the embodiment of the present application, specifically, a plurality of air guide holes 231 are uniformly distributed along the circumference of the flow channel 21 on the nozzle wall and arranged in a ring, the circumferential distribution of the air guide holes 231 enables the gas to enter the flow channel 21 in all directions and mix with the fluid, so that the gas can enter the nozzle 2 from multiple directions, and the intensity of the gas flow entering from multiple directions is consistent, thereby balancing the size of the bubbles produced by the water flow, improving the uniformity of the bubbles produced by the fluid, and enabling the water flow sprayed from the spray pipe 22 to be sprayed to the outside from multiple directions through the air guide holes 231, thereby expanding the spray range of the nozzle 2; a plurality of rings are arranged along the flow direction of the fluid on the nozzle wall, so that the fluid can mix with the gas multiple times during spraying, thereby further enhancing the ability of the fluid to produce bubbles; the plurality of air guide holes 231 are arranged in a ring along the circumference of the flow channel 21, and the plurality of air guide holes 231 are uniformly distributed along the circumference of the flow channel 21.

[0052] The air guide holes 231 in the first ring of air guide units are located downstream of the end face of the small end of the spray pipe 22 and close to the spray pipe 22, so that the water flow sprayed from the spray pipe 22 can be contacted with the gas flow as soon as possible, and the water flow with a relatively high speed can be contacted with the gas flow, thereby increasing the collision between them, generating bubbles with sufficient speed and sufficient quantity, and increasing the bursting ability of the bubbles.

[0053] As shown in Figure 1 and Figure 2 In the embodiment of the present application, the air guide structure 23 further comprises a plurality of air guide pipes 232 corresponding to the air guide holes 231 one by one, and each air guide pipe 232 is in communication with the inside of the flow channel 21 through the corresponding air guide hole 231;

[0054] In embodiments of the present invention, the air guiding structure 23 further includes an air guiding pipe 232, which guides the dynamic gas flow into the air guiding pipe 232. Since the air guiding pipe 232 is connected to the interior of the flow channel 21 through the air guiding port 231, the gas flows into the interior of the flow channel 21 through the air guiding port 231, and the air guiding pipe 232 has a guiding effect on the gas flow. In addition, the water flow sprayed out of the spray pipe 22 enters the air guiding pipe 232 through the air guiding port 231, and the air guiding pipe 232 guides the water flow into the outside. Similarly, the air guiding pipe 232 has a guiding effect on the water flow, preventing the water flow from spraying randomly.

[0055] The air guide tube 232 is a circular straight tube. The inner wall of the circular straight tube is relatively smooth and without bends, which can reduce the frictional resistance to the jet water flow. The air guide tube 232 is located at the air guide port 231 of the nozzle 2, and the axis of the air guide tube 232 coincides with the axis of the air guide port 231.

[0056] In an embodiment of the present invention, the inner wall of the injection pipe 22 is provided with several reinforcing ribs 4.

[0057] In an embodiment of the present invention, since the pressure of the water flow velocity in the spray pipe 22 is relatively high, in order to avoid pressure damage to the spray pipe 22, a reinforcing rib 4 is provided on the inner wall of the spray pipe 22. The reinforcing rib 4 can enhance the strength of the inner wall of the spray pipe 22 and reduce the degree of damage to the spray pipe 22 by the water flow.

[0058] like Figure 3 As shown, in the embodiment of the present invention, the reinforcing rib 4 is strip-shaped and extends from the large end of the spray pipe 22 to the small end of the spray pipe 22 on the inner wall of the spray pipe 22, and its radial dimension gradually decreases. Each reinforcing rib 4 is provided through the entire spray pipe 22, thereby increasing the length of the reinforcing rib 4 and improving the strength of the spray pipe 22.

[0059] Several reinforcing ribs 4 are arranged in a circle along the circumference of the injection pipe 22. The several reinforcing ribs 4 are spaced apart and evenly distributed along the circumference, so that the strength of the injection pipe 22 is relatively balanced at all points.

[0060] In an embodiment of the present invention, the spray pipe 22 is conical, the outer side of the reinforcing rib 4 is an arc-shaped surface adapted to the inner wall of the spray pipe 22, and the inner side opposite to the outer side is a plane. The shape of the reinforcing rib 4 is consistent with the shape of the inner wall of the spray pipe 22, so that the reinforcing rib 4 is adapted to the spray pipe 22, avoiding gaps between them that would reduce the strength of the spray pipe 22. At the same time, the inner side opposite to the outer side of the reinforcing rib 4 is a plane, which is relatively smooth and can reduce frictional resistance to water flow. The aforementioned inner side is the side close to the axis of the spray pipe 22.

[0061] like Figure 2As shown, in the embodiment of the present application, the water outlet 212 of the flow channel 21 is provided with a cover 5 or a cover 5 opening the water outlet 212 of the flow channel 21; the cover 5 is provided on the water outlet 212 of the flow channel 21, and the cover 5 has a sealing effect on the water outlet 212. When the dishwasher does not perform spraying, the cover 5 blocks the water outlet 212 to prevent foreign matter from entering the spray pipe 22 in the nozzle and the spray arm 1 through the water outlet 212, and to prevent the spray pipe 22 from being blocked and the water sprayed from the spray pipe 22 from containing impurities, thereby affecting the cleaning effect of the tableware.

[0062] The cover 5 is provided on the flow channel 21 in various ways, for example, the cover 5 is screwed on the flow channel 21;

[0063] The outer wall of the nozzle is provided with a plurality of outer threads 213 arranged in a circle around the outer wall of the nozzle from top to bottom, the inner wall of the cover 5 is provided with a plurality of inner threads arranged in a circle around the inner wall of the cover 5 from top to bottom, the cover 5 and the nozzle are screwed through the inner and outer threads 213, the cover 5 includes a flat sealing cover 5 body, the sealing cover 5 body is used to cover the water outlet 212 of the cover 5, the edge of the sealing cover 5 body extends to one side in the axial direction, and an extension wall in the form of a ring is arranged along the circumference of the sealing cover 5 body, and the inner thread is arranged on the inner wall of the extension wall.

[0064] As shown, Figure 4 The present application also provides a dishwasher, which comprises a spray arm 1, the spray arm 1 is provided with a water spraying hole, and the spray arm 1 is also provided with the nozzle provided in the above technical solution, and the water inlet 211 of the nozzle is communicated with the water spraying hole.

[0065] In the embodiment of the present application, the dishwasher comprises a spray arm 1, the spray arm 1 is provided with a water inlet, the spray arm 1 is provided with a forward flow channel 21 communicated with the water inlet and a reverse flow channel 21 communicated with the water inlet, the spray arm 1 is provided with a plurality of forward driving holes communicated with the forward flow channel 21 and a plurality of reverse driving holes communicated with the reverse flow channel 21, the setting direction of the forward driving hole is such that the dynamic water flow sprayed from the forward driving hole drives the spray arm 1 to rotate clockwise, and the setting direction of the reverse driving hole is such that the dynamic water flow sprayed from the reverse driving hole drives the spray arm 1 to rotate counterclockwise, the water spraying hole mentioned in the embodiment refers to the forward driving hole and the reverse driving hole, the water spraying hole is provided with a nozzle 2, that is, the forward driving hole and the reverse driving hole are both provided with a nozzle 2, the spray arm 1 can be fixed and immovable to realize static spraying, or can rotate in the horizontal plane to realize rotary spraying;

[0066] The water inlet is arranged on the lower surface of the spray arm 11 and located at the central part of the spray arm 1, the forward driving holes are a plurality of and arranged on the upper surface of one side of the spray arm 1 at intervals, and the reverse driving holes are a plurality of and arranged on the lower surface of the other side of the spray arm 1 at intervals;

[0067] The dishwasher further comprises an inner container, the spray arm 1 is rotatably installed on the bottom wall of the inner container. Since the dishwasher is provided with the gas guide structure 23, the gas guide structure 23 allows the gas to enter the nozzle 2 in the gas guide structure 23, and the gas in the nozzle 2 is guided to mix with the water flow sprayed from the spray pipeline 22. The water flow generates bubbles, and the bubbles are sprayed to contact the tableware and then burst, which can play a strong washing role on stubborn stains and enhance the cleaning effect.

[0068] The nozzle 2 is detachably installed on the spray arm 1 or the nozzle 2 is integrally formed with the spray arm 1. The nozzle is integrally formed with the spray arm 1, which increases the sealing between the nozzle and the spray arm 1, avoids water leakage and gas leakage, and if the gas leaks, the pressure in the nozzle changes, and the water flow cannot be sprayed from the spray pipeline 22.

[0069] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above-mentioned technical content without departing from the technical solution of the present application, and any simple modification, equivalent change and modification of the above-mentioned embodiment according to the technical essence of the present application still belong to the scope of the present application.

Claims

1. A nozzle having a flow channel formed therein, characterized by, The fluid pressurizing structure is arranged in the middle of the flow channel, and the air guide structure is arranged on the nozzle and communicates with the flow channel downstream of the fluid pressurizing structure. The fluid pressurizing structure comprises a conical spray pipe, and the radial dimension of the spray pipe gradually decreases along the flow direction of the fluid. The air guide structure comprises a plurality of air guide openings arranged on the nozzle wall, and any air guide opening is located downstream of the end face of the small end of the spray pipe. The plurality of air guide openings are uniformly distributed on the nozzle wall along the circumference of the flow channel to form a ring of air guide units, and a plurality of rings of air guide units are arranged on the nozzle wall along the flow direction of the fluid. The air guide openings in the first ring of air guide units are located downstream of the end face of the small end of the spray pipe and close to the spray pipe. The air guide structure further comprises a plurality of air guide pipes corresponding to the air guide openings one by one, and each air guide pipe communicates with the inside of the flow channel through the corresponding air guide opening to divert part of the water flow sprayed in the spray pipe.

2. The nozzle of claim 1, wherein The outer peripheral wall at the large end of the spray pipe is arranged close to the inner peripheral wall of the flow channel.

3. The nozzle of claim 1, wherein Each air guide pipe is coaxially arranged with the corresponding air guide opening.

4. A nozzle according to any one of claims 1 to 3, characterised in that The inner wall of the spray pipe is provided with a plurality of reinforcing ribs.

5. The nozzle of claim 4, wherein, The reinforcing ribs are in strip shape, and the reinforcing ribs extend from the large end of the spray pipe to the small end of the spray pipe on the inner wall of the spray pipe, and the radial dimension gradually decreases.

6. The nozzle of claim 5, wherein, A plurality of reinforcing ribs are uniformly distributed on the inner wall of the spray pipe along the circumference of the spray pipe.

7. The nozzle of claim 5, wherein The outer side surface of the reinforcing rib is an arc surface matched with the inner wall of the spray pipe, and the inner side surface opposite to the outer side surface is a plane.

8. The nozzle of claim 1, wherein The water outlet of the flow channel is provided with a cover for plugging or opening the water outlet of the flow channel.

9. The nozzle of claim 1, wherein, The outer wall of the nozzle is provided with external threads arranged along the circumference of the nozzle in multiple turns, the inner wall of the cover is provided with internal threads arranged along the circumference of the cover in multiple turns, and the cover and the nozzle are screwed through the internal and external threads.

10. A dishwasher comprising a spray arm provided with water spray holes, characterized in that The spray nozzle further comprises the spray nozzle of any one of claims 1-9.

11. The warewash machine of claim 10, wherein, The spray nozzle is integrally formed with the spray arm, or the spray nozzle is detachably mounted on the spray arm.

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