A spray head, spray arm and dishwasher

Abstract

The present application relates to kitchen electrical technology field, especially a kind of spray head, spray arm and dishwasher.It is provided with water outlet through hole on the spray head, air inlet through hole is provided on the side wall of water outlet through hole, air inlet through hole has first end and second end, first end is communicated with water outlet through hole, the included angle of the axis of water outlet through hole and the axis of air inlet through hole is set as included angle, second end is set close to the entrance of water outlet through hole relative to first end.According to venturi principle, the pressure of spray head outer wall is higher, gas will be driven by pressure difference, from air inlet through hole into water outlet through hole and into water flow.Small gas bubbles are mixed in water flow, when water flow with small gas bubbles contacts tableware surface, gas bubble will break, that is cavitation phenomenon, produce greater impact force, so as to better clean the stain on tableware surface.The spray arm can better clean the stain on tableware surface.The dishwasher can achieve better cleaning effect on tableware.

Description

Technical Field

[0001] This invention relates to the field of kitchen appliance technology, and more particularly to a spray nozzle, a spray arm, and a dishwasher. Background Technology

[0002] A dishwasher is a device that automatically cleans tableware such as bowls, chopsticks, plates, dishes, knives, and forks. Dishwashers are widely used in restaurants, hotels, homes, and other places that require various types of tableware. With the improvement of living standards, dishwashers have begun to enter home life, and various models of dishwashers have emerged to improve their practicality and convenience.

[0003] In existing technologies, tableware is generally cleaned by rotating a spray arm. The spray arm includes a spray arm body and multiple nozzles. The spray arm body is usually fixed to the nozzles. The spray arm body includes a spray arm cavity. The nozzles have water outlet holes that communicate with the spray arm cavity. The fluid in the spray arm cavity is sprayed outward through the water outlet holes. However, the cleaning effect of the fluid sprayed by the existing spray arm is poor.

[0004] Therefore, there is an urgent need to design a new nozzle, spray arm, and dishwasher to improve the above problems. Summary of the Invention

[0005] The first objective of this invention is to provide a nozzle that, when water carrying small air bubbles comes into contact with the surface of tableware, the air bubbles will burst, that is, cavitation, generating a greater impact force, thereby cleaning the stains on the surface of the tableware more effectively.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A nozzle has a water outlet hole and an air inlet hole on the side wall of the water outlet hole. The air inlet hole has a first end and a second end. The first end is connected to the water outlet hole. The axis of the water outlet hole and the axis of the air inlet hole are set at an angle. The second end is located near the inlet of the water outlet hole relative to the first end.

[0008] As a preferred embodiment, the number of air inlet holes is at least two, and the at least two air inlet holes are arranged at intervals along the flow direction of the fluid in the water outlet hole, or the at least two air inlet holes are arranged at intervals along the circumference of the water outlet hole, or the at least two air inlet holes are evenly distributed on the nozzle.

[0009] As a preferred embodiment, the ratio of the diameter of the air inlet hole to the diameter of the water outlet hole is 1 / 100 to 1 / 2.

[0010] As a preferred embodiment, the diameter of the air inlet gradually decreases from the second end to the first end.

[0011] As a preferred embodiment, a branch air inlet is also provided on the side wall of the water outlet, and the two ends of the branch air inlet are respectively connected to the air inlet and the outside air.

[0012] As a preferred embodiment, the number of branch air intake holes is at least two, and at least two branch air intake holes are connected to the corresponding air intake holes.

[0013] As a preferred embodiment, the nozzle is an elastic element, and the diameter of the water outlet orifice varies with the water pressure within the spray arm cavity; and / or

[0014] When the spray arm cavity is not irrigated with water, the cross-sectional area of ​​the water outlet gradually decreases along the flow direction of the water; and / or

[0015] The water outlet includes a guide section and a straight section connected sequentially along the flow direction of the water flow, and the guide section is a circular arc transition surface.

[0016] The second objective of this invention is to provide a spray arm that, when water carrying small air bubbles comes into contact with the surface of tableware, causes the air bubbles to burst, i.e., cavitation, generating a greater impact force, thereby better cleaning the stains on the surface of the tableware.

[0017] A spray arm includes a spray arm body and a nozzle as described above, the nozzle being disposed on the spray arm body.

[0018] As a preferred embodiment, the spray arm body includes a wall surface, the spray head is mounted on the wall surface, and the axis of the water outlet is set at an acute angle or a right angle to the wall surface.

[0019] As a preferred embodiment, one of the spray arm body and the spray head includes a first limiting member, and the other includes at least two second limiting members, wherein the first limiting member cooperates with any of the second limiting members to adjust the spray direction of the spray head.

[0020] As a preferred embodiment, the spray arm body includes a first connector, and the spray head includes a second connector, wherein the first connector and the second connector are detachably connected.

[0021] As a preferred embodiment, the first connector and the second connector are fixed together by snap-fitting, welding, bonding, riveting or injection molding processes.

[0022] The third objective of this invention is to provide a dishwasher that can achieve a better cleaning effect on tableware.

[0023] To achieve this objective, the present invention adopts the following technical solution:

[0024] A dishwasher includes a spray head as described above or a spray arm as described above.

[0025] The beneficial effects of this invention are:

[0026] The nozzle provided by this invention has a water outlet hole and an air inlet hole on its side wall. The air inlet hole has a first end and a second end. The first end is connected to the water outlet hole, and the axis of the water outlet hole and the axis of the air inlet hole are set at an angle. The second end is positioned relative to the first end and closer to the inlet of the water outlet hole. According to the Venturi principle, when water is sprayed out of the water outlet hole, the flow velocity is relatively high, the pressure in the inner wall area is low, and the pressure on the outer wall of the nozzle is high. Driven by the pressure difference, gas is drawn from the air inlet hole into the water outlet hole and enters the water flow. This mixes small air bubbles into the water flow. When the water flow carrying these small air bubbles comes into contact with the surface of the tableware, the bubbles will burst, i.e., cavitation, generating a large impact force, thereby better cleaning the stains on the surface of the tableware.

[0027] The water outlet includes a guide section and a straight section connected sequentially along the water flow direction. The guide section has a circular arc transition surface. When the water fills the spray arm cavity, it enters from the guide section of the nozzle and sprays out from the free end of the straight section. The circular arc transition surface can reduce the resistance when the water flows through, ensuring a high flow rate of water sprayed from the nozzle and improving the cleaning effect of the dishwasher.

[0028] The ratio of the diameter of the air inlet to the diameter of the water outlet is 1 / 100 to 1 / 2. Because the diameter of the air inlet is significantly different from that of the water outlet, the air outside the nozzle can enter the water outlet more smoothly and in greater quantities, thereby forming denser small bubbles, which is beneficial for cleaning tableware with the fluid mixed with small bubbles.

[0029] From the second end to the first end, the diameter of the air inlet gradually decreases, and the speed at which external gas enters gradually increases, allowing the external gas to enter the fluid in the water outlet at a greater speed, thereby increasing the density of small bubbles and improving the cleaning effect of the fluid mixed with small bubbles.

[0030] The water outlet hole is also provided with branch air inlet holes on its side wall. The two ends of the branch air inlet holes are connected to the air inlet hole and the outside air, respectively. The more branch air inlet holes, the more gas can enter the air inlet hole, thus allowing more gas to mix into the fluid in the water outlet hole. The resulting small bubbles are more compact and have a better effect on wrapping impurities on the surface of the tableware, thus achieving a better cleaning effect on the surface of the tableware.

[0031] The side wall of the water outlet is also provided with branch air outlets, which are connected to the water outlet and the air inlet respectively. This allows more gas to enter the fluid in the water outlet, further improving the density of small air bubbles in the fluid and enhancing the cleaning effect of the fluid mixed with small air bubbles in the water outlet on the surface of the tableware.

[0032] The spray arm body includes a first connecting member, and the spray head includes a second connecting member. The first and second connecting members are detachably connected, facilitating the disassembly and replacement of the spray head and improving the operator's ability to replace and clean it. Since all spray heads are detachable, cavitation spray heads can be used exclusively, or other types of spray heads can be used in conjunction. During testing, the combination of different spray heads can be adjusted based on the actual cleaning effect to achieve the best cleaning result, shortening the verification time for repeated sampling of different spray arms. When cleaning the spray arm, the spray head can be directly removed for separate cleaning of the spray head and spray arm body. Furthermore, due to the fully detachable spray head design, if one spray head is damaged, only that single spray head needs to be replaced during repair, eliminating the need to replace the entire spray arm. This simplifies operation and significantly reduces spray head replacement costs. Different spray heads can also be used for different types of tableware to achieve differentiated cleaning and optimal dishwasher cleaning results. Additionally, the spray head position can be changed according to the arrangement of the tableware, allowing the spray head to target harder-to-clean items, ensuring optimal cleaning even with varying tableware placement.

[0033] The second limiting part includes a cantilever part and a snap-fit ​​part. The two ends of the cantilever part are fixedly connected to the main body and the snap-fit ​​part, respectively. Because the cantilever part is slender, it can undergo a certain degree of elastic deformation. When the nozzle is to be assembled onto the spray arm body, the snap-fit ​​structure is aligned with the insertion hole on the wall surface, and the nozzle is pressed down. The snap-fit ​​structure deforms and snaps into the insertion hole. Under the combined restraint of the plate-shaped first limiting part and the snap-fit ​​structure, the nozzle is fixed to the spray arm body. When the nozzle needs to be removed, simply pull the nozzle outwards. Due to the force, the snap-fit ​​structure deforms and disengages from the insertion hole, making the operation convenient and quick.

[0034] The nozzle is an elastic component, and the diameter of the water outlet hole changes with the fluid pressure inside the spray arm cavity. The nozzle has the characteristic of deforming when subjected to a certain pressure. The nozzle can automatically match the corresponding pressure and adjust the diameter of the water outlet hole, thereby ensuring that the water flow velocity is maintained at a high and stable level.

[0035] The spray arm provided by this invention causes small air bubbles to burst when they come into contact with the surface of tableware, which is a cavitation phenomenon. This generates a greater impact force, thereby cleaning the stains on the surface of the tableware more effectively.

[0036] The dishwasher provided by this invention can achieve a good cleaning effect on tableware. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of the dishwasher provided in Embodiment 1 of the present invention;

[0038] Figure 2 yes Figure 1 A magnified view of a section at point C;

[0039] Figure 3 This is a schematic diagram of the spray arm structure provided in Embodiment 1 of the present invention. Figure 1 ;

[0040] Figure 4 This is a schematic diagram of the structure of the spray arm (excluding the nozzle) provided in Embodiment 1 of the present invention;

[0041] Figure 5 This is a cross-sectional view of the spray arm provided in Embodiment 1 of the present invention;

[0042] Figure 6 This is a cross-sectional view of the first type of nozzle provided in Embodiment 1 of the present invention;

[0043] Figure 7 This is a cross-sectional view of the second type of nozzle provided in Embodiment 1 of the present invention;

[0044] Figure 8 This is a cross-sectional view of the third type of nozzle provided in Embodiment 1 of the present invention;

[0045] Figure 9 This is a cross-sectional view of the fourth type of nozzle provided in Embodiment 1 of the present invention;

[0046] Figure 10 This is a schematic diagram of the spray arm structure provided in Embodiment 1 of the present invention. Figure 2 ;

[0047] Figure 11 This is a cross-sectional view of the nozzle and the wall surface provided in Embodiment 2 of the present invention;

[0048] Figure 12 This is a schematic diagram of the spray arm provided in Embodiment 3 of the present invention;

[0049] Figure 13 yes Figure 12 A magnified view of a section at point A in the middle;

[0050] Figure 14 This is a schematic diagram of the nozzle structure provided in Embodiment 3 of the present invention;

[0051] Figure 15 This is a schematic diagram of the nozzle in the first state according to Embodiment 3 of the present invention;

[0052] Figure 16 This is a schematic diagram of the nozzle in the second state provided in Embodiment 3 of the present invention;

[0053] Figure 17 This is a schematic diagram of the nozzle in the third state according to Embodiment 3 of the present invention;

[0054] Figure 18 This is a schematic diagram of the nozzle in the fourth state provided in Embodiment 3 of the present invention;

[0055] Figure 19 This is a cross-sectional view of the nozzle provided in Embodiment 4 of the present invention when no fluid is introduced;

[0056] Figure 20 This is a cross-sectional view of the nozzle with fluid flowing into it, provided in Embodiment 4 of the present invention;

[0057] Figure 21 This is a cross-sectional view of the nozzle and the wall surface provided in Embodiment 5 of the present invention;

[0058] Figure 22 This is an exploded view of the nozzle and the wall surface provided in Embodiment 5 of the present invention;

[0059] Figure 23 This is a schematic diagram of the wall structure provided in Embodiment 5 of the present invention;

[0060] Figure 24 This is a schematic diagram of the wall structure provided in Embodiment Six of the present invention;

[0061] Figure 25 This is a cross-sectional view of the nozzle and the wall surface provided in Embodiment Six of the present invention;

[0062] Figure 26 This is an exploded view of the nozzle and the wall surface provided in Embodiment Six of the present invention;

[0063] Figure 27 This is a cross-sectional view of the nozzle and the wall surface provided in Embodiment 7 of the present invention;

[0064] Figure 28 This is a schematic diagram of the structure of the nozzle and the wall surface provided in Embodiment 7 of the present invention;

[0065] Figure 29 This is an exploded view of the nozzle and the wall surface provided in Embodiment 7 of the present invention;

[0066] Figure 30 This is a schematic diagram of the structure of the nozzle and the wall surface provided in Embodiment 8 of the present invention;

[0067] Figure 31 This is an exploded view of the nozzle and the wall surface provided in Embodiment 8 of the present invention;

[0068] Figure 32 This is a schematic diagram of the structure of the nozzle and the wall surface provided in Embodiment 9 of the present invention;

[0069] Figure 33 This is an exploded view of the nozzle and the wall surface provided in Embodiment 9 of the present invention;

[0070] Figure 34 This is a schematic diagram of the structure of the first type of nozzle and wall surface provided in Embodiment 10 of the present invention;

[0071] Figure 35 This is a schematic diagram of the structure of the second type of nozzle and wall surface provided in Embodiment 10 of the present invention;

[0072] Figure 36 This is a schematic diagram of the third type of nozzle and wall structure provided in Embodiment 10 of the present invention. Figure 1 ;

[0073] Figure 37 This is a schematic diagram of the third type of nozzle and wall structure provided in Embodiment 10 of the present invention. Figure 2 ;

[0074] Figure 38 This is a cross-sectional view of the first type of nozzle and wall surface provided in Embodiment Eleven of the present invention;

[0075] Figure 39 This is a cross-sectional view of the second type of nozzle and wall surface provided in Embodiment Eleven of the present invention.

[0076] In the picture:

[0077] 100. Dishwasher;

[0078] 10. Spray arm; 1. Spray arm body; 11. Spray arm cavity; 12. Wall surface; 121. First connecting piece; 122. Opening; 13. First limiting piece; 131. Second abutting surface; 132. Second outer peripheral surface; 2. Spray head; 21. Water outlet hole; 211. Guide section; 212. Straight section; 22. Second connecting piece; 221. First limiting part; 2211. First outer peripheral surface; 222. Main body Part; 2221, Air inlet; 22212, First end; 22211, Second end; 2222, Branch air inlet; 2223, Branch air outlet; 223, Second limiting part; 2231, Cantilever part; 2232, Snap-fit ​​part; 22321, Trigger surface; 23, Second limiting member; 231, Guide surface; 232, First abutment surface; 24, Main body; 3, Buckle; 4, Spray arm shaft;

[0079] 20. Dish basket; 210. Dish basket frame; 220. Roller; 30. Spray arm water pipe; 40. Water inlet pipe; 60. Snap-fit ​​connector; 80. Guide rail; 90. Body; 91. Receiving cavity. Detailed Implementation

[0080] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present invention are shown in the accompanying drawings, not all of them.

[0081] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0082] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0083] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0084] Example 1

[0085] like Figure 1 and Figure 2As shown, an embodiment of the present invention provides a dishwasher 100, which includes a body 90, a dish rack 20, a spray arm water pipe 30, a spray arm 10, and a water inlet pipe 40. The body 90 has a receiving cavity 91, the dish rack 20 is disposed in the receiving cavity 91 and is used to hold the tableware to be washed (not shown in the figure), the water inlet pipe 40 is fixed to the inner wall of the receiving cavity 91, and the water source (not shown in the figure), the water inlet pipe 40, the spray arm water pipe 30 and the spray arm 10 are connected in sequence. The water provided by the water source passes through the water inlet pipe 40, the spray arm water pipe 30 and the spray arm 10 in sequence and is sprayed out from the spray arm 10. The sprayed water is used to wash the tableware to be washed in the dish rack 20 below the dish rack 20.

[0086] like Figures 1-2 As shown, the dishwasher 100 also includes a snap-fit ​​connector 60, which is fixedly connected to the spray arm hose 30 and snaps into the dish rack 20, thereby securing the spray arm hose 30 to the dish rack 20. The dish rack 20 can then stably support the spray arm hose 30. Of course, the snap-fit ​​connector 60 can be replaced with other fasteners capable of fixing the spray arm hose 30 to the dish rack 20. Fasteners can include screws, pins, etc., and this embodiment does not impose specific limitations.

[0087] like Figures 1-2 As shown, the dishwasher 100 also includes a guide rail 80 disposed on the inner wall of the receiving cavity 91. The guide rail 80 extends along the pull-out direction of the dish rack 20. The dish rack 20 includes a dish rack frame 210 and a roller 220 pivotally connected thereto. The roller 220 can move along the guide rail 80. The guide rail 80 can achieve a good guiding effect on the roller 220, ensuring that the dish rack 20 can achieve a good pull-out effect in a predetermined direction and preventing the dish rack 20 from tilting during the pull-out process.

[0088] like Figures 1-2 As shown, since the spray arm water pipe 30 and the basket 20 move together, when the basket 20 is at least partially pulled out of the machine body 90, the free end of the spray arm water pipe 30 separates from the free end of the inlet pipe 40. When the basket 20 is completely pushed into the machine body 90, the free end of the spray arm water pipe 30 is connected to the free end of the inlet pipe 40, thereby enabling the water in the inlet pipe 40 to enter the spray arm water pipe 30 and the spray arm 10.

[0089] like Figures 2-5As shown, the spray arm 10 includes a spray arm body 1, a spray head 2, a spray arm shaft 4, and a clip 3. The spray arm body 1 has the spray arm shaft 4 and the clip 3 at its bottom axis. The function of the spray arm shaft 4 and the clip 3 is to fix the spray arm body 1 to the spray arm seat or the spray arm water pipe 30 at the bottom of the dishwasher 100, and to allow the spray arm body 1 to rotate around the spray arm shaft 4 under the action of water flow. Under the action of the clip 3, the spray arm body 1 can rotate relative to the spray arm seat or the spray arm water pipe 30, while the spray arm body 1 will not detach from the spray arm seat or the spray arm water pipe 30.

[0090] like Figures 2-5 As shown, the spray arm body 1 includes a wall 12 and a spray arm cavity 11. A nozzle 2 is installed on the wall 12. The nozzle 2 has a water outlet hole 21 that communicates with the spray arm cavity 11. Water in the spray arm seat or the spray arm water pipe 30 can be sprayed outward through the spray arm shaft 4, the spray arm cavity 11 and the water outlet hole 21 in sequence.

[0091] like Figure 3 and Figure 5 As shown, the nozzles 2 can be divided into cleaning nozzles and drive nozzles according to their main functions. There are more cleaning nozzles, which are scattered on the wall 12. The spray direction of the cleaning nozzles is generally perpendicular to the wall 12. The water flow from the cleaning nozzles is mainly used to rinse and clean tableware. The drive nozzles are generally located at the corners of the spray arm body 1. The spray direction of the drive nozzles forms an angle with the wall 12, and the spray direction of the drive nozzles is opposite to the rotation direction of the spray arm body 1. When water flows out from the drive nozzles, under the reaction force of the water flow, the spray arm body 1 will rotate around the spray arm axis 4 in the opposite direction of the spray direction of the drive nozzles.

[0092] like Figure 5 As shown, an air inlet 2221 is provided on the side wall of the water outlet 21. The air inlet 2221 has a first end 22212 and a second end 22211. The first end 22212 is connected to the water outlet 21, and the axis of the water outlet 21 and the axis of the air inlet 2221 are set at an angle. The second end 22211 is set closer to the inlet of the water outlet 21 than the first end 22212. According to the Venturi principle, when the water flows out of the water outlet 21, the flow velocity is relatively fast, the pressure in the inner wall area is low, and the pressure on the outer wall of the nozzle 2 is high. Driven by the pressure difference, the gas is drawn from the air inlet 2221 into the water outlet 21 and enters the water flow. This mixes small air bubbles into the water flow. When the water flow carrying the small air bubbles comes into contact with the surface of the tableware, the bubbles will burst, that is, cavitation, generating a large impact force, thereby cleaning the stains on the surface of the tableware better.

[0093] In other embodiments, such as Figure 6As shown, there are at least two air inlet holes 2221, which are arranged at intervals along the flow direction of the fluid in the water outlet hole 21. A larger number of air inlet holes 2221 allows more gas to enter the water flow within the water outlet hole 21, forming more small bubbles and thus achieving a better cleaning effect on the tableware surface. In other embodiments, such as... Figure 7 and Figure 8 As shown, at least two air inlet holes 2221 are arranged at intervals along the circumference of the water outlet hole 21, or at least two air inlet holes 2221 are evenly distributed on the nozzle 10, which can also achieve a better cleaning effect on the surface of tableware.

[0094] like Figure 6 As shown, when no water flow enters the spray arm cavity 11, the cross-sectional area of ​​the water outlet 21 gradually decreases along the direction of water flow. When water is sprayed out from the nozzle 2, the water flow speed gradually increases due to the gradual reduction in orifice diameter, enabling the water to be sprayed out at a greater speed, thereby improving the cleaning effect of the dishwasher 100.

[0095] As a preferred option, such as Figure 6 As shown, the water outlet 21 includes a guide section 211 and a straight section 212 connected sequentially along the water flow direction. The guide section 211 is an arc transition surface. When the water flow fills the spray arm cavity 11, it enters from the guide section 211 of the nozzle 2 and sprays out from the free end of the straight section 212. The arc transition surface can reduce the resistance when the water flows through, ensuring a high flow rate of the water sprayed from the nozzle 2 and improving the cleaning effect of the dishwasher 100.

[0096] Furthermore, such as Figures 5-8 As shown, the ratio of the diameter of the air inlet 2221 to the diameter of the water outlet 21 is 1 / 100 to 1 / 2. Because the diameters of the air inlet 2221 and the water outlet 21 differ significantly, a larger amount of air from outside the nozzle 2 can enter the water outlet 21 more smoothly, forming denser small bubbles. This facilitates the subsequent cleaning of tableware by the fluid mixed with these small bubbles. Furthermore, from the second end 22211 to the first end 22212, the diameter of the air inlet 2221 gradually decreases, and the speed at which external air enters gradually increases. This allows the external air to enter the fluid in the water outlet 21 at a higher speed, increasing the density of the small bubbles and improving the cleaning effect of the fluid mixed with these small bubbles.

[0097] As a preferred option, such as Figure 9As shown, branch air inlets 2222 are also provided on the side wall of the water outlet 21. The two ends of each branch air inlet 2222 are connected to the air inlet 2221 and external air, respectively. The presence of multiple branch air inlets 2222 allows more external gas to enter the air inlet 2221, thus mixing more gas into the fluid in the water outlet 21. This results in denser small bubbles, which better encapsulate impurities on the surface of the tableware, achieving a better cleaning effect. Furthermore, as... Figure 9 As shown, the ratio of the diameter of the branch intake port 2222 to the diameter of the intake port 2221 is 1 / 100 to 1 / 2, compared to... Figure 5 The nozzle 2 shown is... Figure 9 The nozzle 2 with the structure shown can achieve the formation of denser small bubbles, and due to the diameter difference, it can enable external gas to enter the water outlet through the branch air inlet 2222 more smoothly.

[0098] Furthermore, such as Figure 9 As shown, there are at least two branch air intake holes 2222, and each of the at least two branch air intake holes 2222 is connected to a corresponding air intake hole 2221, which allows more external gas to enter the air intake hole 2221 through the branch air intake holes 2222. Furthermore, in this embodiment, the branch air intake holes 2222 are straight through holes, enabling external gas to quickly enter the air intake hole 2221 through the branch air intake holes 2222.

[0099] In other embodiments, the branch air inlet 2222 can be in the form of a zigzag or wavy line (not shown in the figure). External gas passing through this branch air inlet 2222 can continuously impact the inner wall of the branch air inlet 2222. The gas entering the air inlet 2221 and the water outlet 21 through the branch air inlet 2222 has different velocity directions. The gas entering the fluid in the water outlet 21 can fully and completely turbulentize the fluid, thereby forming denser bubbles, which facilitates better cleaning of tableware by the fluid containing small bubbles.

[0100] In addition, such as Figure 9As shown, branch air outlet holes 2223 are also provided on the side wall of the water outlet hole 21. The branch air outlet holes 2223 are connected to both the water outlet hole 21 and the air inlet hole 2221, allowing more channels for gas to enter the fluid in the water outlet hole 21. This further improves the density of small air bubbles in the fluid in the water outlet hole 21, enhancing the cleaning effect of the fluid containing small air bubbles on the tableware surface. Furthermore, the branch air outlet holes 2223 enable greater air mixing in the fluid of the water outlet hole 21, improving gas-liquid mixing efficiency and increasing the proportion of small air bubbles per unit volume of fluid, thereby further enhancing the cleaning effect of the fluid containing small air bubbles on the tableware.

[0101] like Figures 5-9 As shown, the spray arm body 1 includes a first connecting member 121, and the spray head 2 includes a second connecting member 22. The first connecting member 121 and the second connecting member 22 are detachably connected, facilitating the disassembly and replacement of the spray head 2 and improving the operator's ability to replace and clean the spray head 2. Since all spray heads 2 are detachable, all cavitation spray heads 2 can be used, or other types of spray heads 2 can be used in conjunction. During testing, the combination of different spray heads 2 can be adjusted according to the actual cleaning effect to achieve the best cleaning result, shortening the verification time for repeated sampling of different spray arms 10. When cleaning the spray arm 10, the spray head 2 can be directly removed for separate cleaning of the spray head 2 and the spray arm body 1. Furthermore, due to the fully detachable spray head 2, if one of the spray heads 2 is damaged, only the individual spray head 2 needs to be replaced during repair, without replacing the entire spray arm 10. This simplifies operation and significantly reduces the replacement cost of the spray head 2. Simultaneously, different spray heads 2 can be used for different tableware to achieve differentiated cleaning of different tableware and achieve the best cleaning effect of the dishwasher 100. In addition, depending on the arrangement of the dishes, the position of nozzle 2 can be changed so that nozzle 2 can be aimed at the more difficult-to-clean dishes. In this way, even if the dishes are placed in different positions, the best cleaning effect can be achieved.

[0102] As a preferred option, such as Figures 5-9 As shown, one of the first connector 121 and the second connector 22 is a second recess, and at least part of the other one is inserted into the second recess, which enables quick disassembly and replacement of the nozzle 2 and the spray arm body 1.

[0103] like Figures 5-9As shown, the first connector 121 is a second recess on the spray arm body 1. The second recess is an insertion hole that is connected to the spray arm cavity 11. At least part of the second connector 22 is inserted into the insertion hole and can completely seal the second recess, which can prevent water from leaking out of the spray arm cavity 11 from the gap between the first connector 121 and the second connector 22, ensuring a high water pressure from the spray nozzle 2 and achieving a better cleaning effect from the spray nozzle 2.

[0104] Furthermore, such as Figures 5-9 As shown, the second connector 22 includes a main body 222 and a first limiting part 221 and a second limiting part 223 arranged at intervals along a preset direction on its outer periphery. At least a portion of the main body 222 is inserted into the insertion hole, and the first limiting part 221 and the second limiting part 223 are clamped on both sides of the wall surface 12 where the insertion hole is opened. When the nozzle 2 is to be assembled onto the spray arm body 1, the second limiting part 223 is pressed forcefully towards the insertion hole to deform the insertion hole, allowing the second limiting part 223 to extend into the insertion hole. Then, the second limiting part 223 returns to its original shape. Under the restraining action of the first limiting part 221 and the second limiting part 223, the nozzle 2 is fixed on the spray arm body 1. The arrangement of the first limiting part 221 and the second limiting part 223 can prevent the nozzle 2 from falling off the spray arm body 1, ensuring a better performance of the spray arm 10. When it is necessary to disassemble the nozzle 2, simply pull the nozzle 2 outward with force. Due to the force, the second limiting part 223 will deform and disengage from the socket, making the operation convenient and quick. At the same time, the diameter of the socket can be set to be larger, making it easier for the operator to inspect and clean the inside of the spray arm body 1 compared to a typical fixed nozzle type spray arm 10.

[0105] like Figures 5-9 As shown, the first limiting part 221 and the second limiting part 223 are plate-shaped, and their cross-sections are larger than the cross-section of the insertion hole. This allows for greater contact between the first limiting part 221 and the second limiting part 223 and the wall surface 12, increasing the pressure and static friction between them. This further prevents the nozzle 2 from rotating relative to the spray arm body 1, ensuring that the predetermined spray direction of the nozzle 2 remains unchanged when the spray arm 10 rotates. Preferably, the distance between the first limiting part 221 and the second limiting part 223 is slightly smaller than the thickness of the wall surface 12. This allows for an interference fit between the first limiting part 221 and the second limiting part 223 and the wall surface 12, further increasing the pressure and static friction between them. This further prevents the nozzle 2 from rotating relative to the spray arm body 1, ensuring that the predetermined spray direction of the nozzle 2 remains unchanged.

[0106] In addition, such as Figures 5-9As shown, since the replaceable nozzle 2 is made of rubber, the main body 222 and the socket are assembled by interference fit. When the nozzle 2 is assembled onto the spray arm body 1 by deformation, the fit between the main body 222 and the socket makes the nozzle 2 itself play a sealing role, which can further prevent water from flowing out from the gap between the nozzle 2 and the spray arm body 1.

[0107] As a preferred embodiment, the first connector 121 and the second connector 22 can also be fixed together by snap-fitting, welding, bonding, riveting, or injection molding processes, so that after the entire spray arm 10 is integrally formed, the nozzle 2 and the spray arm body 1 can be firmly combined. The nozzle 2 is typically made of rubber, while the spray arm body 1 is typically made of plastic. Therefore, the first connector 121 and the second connector 22 are fixed together by a double-material, double-injection molding process, ensuring a very strong bond between the rubber and plastic materials. Furthermore, since the nozzle 2 and the spray arm body 1 are made of two different materials, they can be made of different colors, resulting in a more colorful spray arm 10, preventing it from being a single-color product and making the spray arm 10 more aesthetically pleasing.

[0108] In addition, such as Figure 10 As shown, the spray arm body 1 includes a first limiting member 13, and the nozzle 2 includes a second limiting member 23. The first limiting member 13 and the second limiting member 23 cooperate to limit the relative position of the spray arm body 1 and the nozzle 2. When it is necessary to assemble a nozzle 2 with limiting requirements, the first limiting member 13 and the second limiting member 23 are placed correspondingly. This ensures that after the nozzle 2 is assembled into the spray arm body 1, the direction of water outlet of the nozzle 2 is guaranteed, which plays a positioning and limiting role, and facilitates the assembly of nozzles 2 with limiting requirements, such as drive nozzles.

[0109] like Figure 10 As shown, the first limiting member 13 is a second protrusion provided on the wall surface 12, and the second limiting member 23 is a second recess provided on the nozzle 2. When it is necessary to assemble the nozzle 2 with limiting, the second recess on the nozzle 2 can be placed in correspondence with the second protrusion on the spray arm body 1, which is convenient for the operator. In addition, the cooperation between the second protrusion and the second recess ensures the uniqueness of the direction of the nozzle 2 when it is assembled on the spray arm 10, and ensures that the nozzle 2 itself will not rotate during the spraying process, ensuring that the water flow sprayed from the nozzle 2 is sprayed in a predetermined direction.

[0110] Specifically, such as Figure 10 As shown, the second recess is a notch formed by the inward indentation of the edge of the nozzle 2. The quick assembly and disassembly of the second recess and the second protrusion facilitate the operator's operation.

[0111] Furthermore, such as Figure 10As shown, in this embodiment, the first limiting member 13 is disposed outside the spray arm cavity 11, making it convenient for the operator to observe the relative position of the nozzle 2 and the spray arm body 1. The operator can quickly and accurately align the second protrusion with the second recess that needs to be aligned. Of course, in other embodiments, the first limiting member 13 is disposed inside the spray arm cavity 11, and the second protrusion is hidden inside the spray arm body 1, resulting in a more aesthetically pleasing external shape for the spray arm body 1.

[0112] Example 2

[0113] like Figure 11 As shown, this embodiment provides a spray arm 10. The structure of the spray arm 10 in this embodiment is basically the same as that of the spray arm 10 in Embodiment 1. The main difference between the two is that the second limiting part 223 in this embodiment can be a snap-fit ​​structure. By setting the snap-fit ​​structure, the nozzle 2 and the spray arm body 1 can be quickly disassembled and assembled, thereby improving the disassembly and assembly efficiency of the nozzle 2 and the spray arm body 1.

[0114] Specifically, such as Figure 11 As shown, the second limiting part 223 includes a cantilever part 2231 and a snap-fit ​​part 2232. The two ends of the cantilever part 2231 are fixedly connected to the main body part 222 and the snap-fit ​​part 2232, respectively. Because the cantilever part 2231 is elongated, it can undergo a certain degree of elastic deformation. When the nozzle 2 is to be assembled onto the spray arm body 1, the snap-fit ​​structure is aligned with the insertion hole on the wall surface 12, and then the nozzle 2 is pressed down. The snap-fit ​​structure deforms and snaps into the insertion hole. Under the combined limiting action of the plate-shaped first limiting part 221 and the snap-fit ​​structure, the nozzle 2 is fixed to the spray arm body 1. When it is necessary to disassemble the nozzle 2, simply pull the nozzle 2 outwards. Due to the force, the snap-fit ​​structure deforms and disengages from the insertion hole, making the operation convenient and quick. For example, Figure 11 As shown, the maximum distance between the locking part 2232 and the cantilever part 2231 is 2mm to 100mm, which allows the locking part 2232 to easily disengage from the insertion hole when the operator pulls the nozzle 2 outward with a small force. As a preferred embodiment, the aforementioned maximum distance is preferably 40mm to 50mm, which not only ensures a stable connection between the locking part 2232 and the wall surface 12, but also facilitates the operator's separation of the nozzle 2 from the wall surface 12.

[0115] Of course, in other embodiments, only the first limiting part 221 may be configured as a snap-fit ​​structure, or both the first limiting part 221 and the second limiting part 223 may be configured as snap-fit ​​structures.

[0116] As a preferred option, such as Figure 11As shown, the snap-fit ​​structure is configured in three sets, distributed circumferentially along the main body 222, thereby ensuring that each position of the main body 222 can securely abut against the wall surface 12. Specifically, the three snap-fit ​​structures are arranged at equal intervals along the circumference of the main body 222, ensuring uniform stress on each snap-fit ​​structure, preventing damage, extending the service life of each snap-fit ​​structure, reducing the need for user replacement of the nozzle 2, and lowering the consumable consumption of the dishwasher 100.

[0117] As a preferred option, such as Figure 11 As shown, the locking part 2232 includes a trigger surface 22321. When the operator presses down on the nozzle 2, the opening edge of the insertion hole abuts against the trigger surface 22321. The opening edge of the insertion hole applies pressure to the locking part 2232 to move towards the water outlet hole 21, thereby causing the cantilever part 2231 to bend towards the water outlet hole 21. This allows the locking part 2232 to enter the spray arm cavity 11 through the insertion hole, and the locking part 2232 can be locked against the inner surface of the wall 12. The operator can quickly install the nozzle 2 onto the wall 12 by simply pressing.

[0118] Specifically, the snap-fit ​​structure can be made of materials such as resin, plastic, and rubber that can produce elastic deformation, which can further improve the elastic deformation capability of the snap-fit ​​structure after being subjected to force. All materials that can produce elastic deformation are within the protection scope of this disclosure.

[0119] Example 3

[0120] In existing technologies, the spray arm body is usually fixed to the spray head, and the spray direction of the spray head is also fixed. For different models of dishwashers, the coverage area of ​​a spray head with a single spray direction is limited, and there are blind spots in the cleaning of the spray arm. If it is necessary to adjust the spray direction of the spray head, the entire spray arm must be remade. The adaptability of a single model of spray arm to different models of dishwashers is poor. It is necessary to make a corresponding spray arm for each model of dishwasher, which will lead to high manufacturing costs for dishwashers.

[0121] To solve the above problems, such as Figures 12-18As shown, in this embodiment, the spray arm body 1 and the spray head 2 are movably connected. One of the spray arm body 1 and the spray head 2 includes a first limiting member 13, and the other includes at least two second limiting members 23. The first limiting member 13 cooperates with any of the second limiting members 23 to adjust the spray direction of the spray head 2. This allows for multi-level adjustment of the spray direction of the spray head 2, enabling adaptive adjustment of the spray head 2 for different models of dishwashers 100. The operation is simple and convenient, ensuring that the spray arm 10 is compatible with different models of dishwashers 100. The adjusted spray arm 10 can cover a wider area, guaranteeing a better cleaning effect for the dishwasher 100. When conducting a cleaning test, the spray direction of the spray head 2 can be adjusted according to the actual test results. This eliminates the need to remanufacture the entire spray arm 10; only the spray direction of the spray head 2 needs adjustment, resulting in low manufacturing costs for the dishwasher 100.

[0122] As a preferred option, such as Figures 13-18 As shown, the first limiting member 13 is a first protrusion provided on the wall surface 12, and the second limiting member 23 is a first recess provided on the nozzle 2. At least two first recesses are arranged in a circumferential direction. By rotating the nozzle 2, the first protrusion can be selectively inserted into any first recess, enabling quick switching between the first protrusion and different first recesses, which is convenient for the operator. In addition, the cooperation between the first protrusion and the first recess ensures the uniqueness of the direction of the nozzle 2 when it is assembled onto the spray arm 10, and ensures that the nozzle 2 itself will not rotate during the spraying process, ensuring that the water flow from the nozzle 2 is sprayed in a predetermined direction.

[0123] Specifically, such as Figures 13-18 As shown, the first recess is a notch formed by the inward indentation of the edge of the nozzle 2. At least one of the nozzle 2 and the first protrusion is made of a flexible material such as rubber or silicone. There is no need to remove the nozzle 2 from the spray arm body 1. The first protrusion can be switched with different notches simply by rotating the nozzle 2, which is convenient for the operator.

[0124] Furthermore, such as Figure 18As shown, the nozzle 2 includes a first outer peripheral surface 2211, and a first recess is formed by the inward indentation of the first outer peripheral surface 2211. The first recess includes a first abutting surface 232 and guide surfaces 231 located on both sides thereon. The end of the guide surface 231 away from the first abutting surface 232 is connected to the adjacent first outer peripheral surface 2211. Both the first abutting surface 232 and the guide surface 231 are arc surfaces, and their bending directions are opposite. The guide surface 231 can guide the first limiting member 13 into the first recess or guide the first limiting member 13 outward from the first recess, thus preventing the first limiting member 13 from getting stuck when switching positions. In other embodiments, the first recess may also be a insertion hole.

[0125] Furthermore, such as Figure 18 As shown, the first limiting member 13 includes a second abutting surface 131 and a second outer peripheral surface 132, the second abutting surface 131 being an arc surface. The shape and size of the second abutting surface 131 are the same as the shape and size of the first abutting surface 232. When the nozzle 2 is not subjected to external force, the first limiting member 13 is located in the first recess, and the first abutting surface 232 and the second abutting surface 131 can cooperate well with each other, preventing the nozzle 2 from rotating relative to the spray arm body 1, thus achieving a good anti-mistake effect. When the first limiting member 13 is located in the first recess, the second outer peripheral surface 132 does not extend beyond the outer side of the first outer peripheral surface 2211, preventing the first limiting member 13 from obstructing the rotation of the nozzle 2 relative to the spray arm body 1.

[0126] Furthermore, in this embodiment, the first limiting member 13 is disposed outside the spray arm cavity 11, making it convenient for the operator to observe the relative position of the nozzle 2 and the spray arm body 1. The operator can quickly and accurately align the first protrusion with the first recess that needs to be aligned. Of course, in other embodiments, the first limiting member 13 is disposed inside the spray arm cavity 11, and the first protrusion is hidden inside the spray arm body 1, resulting in a more aesthetically pleasing external shape for the spray arm body 1.

[0127] As a preferred option, such as Figures 13-18 As shown, at least two second limiting members 23 are arranged at equal intervals along the circumferential direction, which can achieve uniform adjustment of the spray direction of the nozzle 2.

[0128] like Figures 13-18 As shown, only one first protrusion is provided, which enables quick alignment and insertion of the first protrusion with the corresponding first recess.

[0129] In other embodiments, there may be at least two first limiting members 13, and the number of first limiting members 13 shall not exceed the number of second limiting members 23. When any first limiting member 13 cooperates with a corresponding second limiting member 23, the remaining first limiting members 13 cooperate with corresponding second limiting members 23. The cooperation of a larger number of first limiting members 13 with corresponding second limiting members 23 improves the fixing effect between the spray arm body 1 and the nozzle 2, prevents the nozzle 2 from falling off the spray arm body 1, and ensures the normal use effect of the spray arm 10.

[0130] Example 4

[0131] In the prior art, the water flow in the spray arm body 1 is sprayed outward through the nozzle 2, and the impact force of the water flow is used to rinse and clean the tableware inside the dishwasher 100. However, due to insufficient water pressure and pressure loss in the water circuit, the water flow pressure sprayed out by the spray arm 10 is insufficient, the cleaning force on the surface of the tableware is not enough, and the cleaning effect is not ideal.

[0132] To solve the above problems, such as Figure 19 and Figure 20 As shown, this embodiment provides a spray arm 10. The structure of the spray arm 10 in this embodiment is basically the same as that of the spray arm 10 in Embodiment 1. The main difference between the two is that: Figure 19 and Figure 20 As shown, the nozzle 2 is an elastic element, and the diameter of the water outlet hole 21 changes with the fluid pressure inside the spray arm cavity 11. The nozzle 2 has the characteristic of deforming under certain pressure. Figure 20 As shown, during the washing process, when the overall water pressure is relatively high, the water flow sprayed from the nozzle 2 can squeeze the side wall of the nozzle 2, increasing the first diameter d2 of the outlet of the water outlet hole 21 of the nozzle 2, thus increasing the diameter of the sprayed water flow. Figure 19 As shown, when the washing pump power decreases due to residue during the washing process, the water pressure it provides decreases, and the force of the water flow also decreases. At this time, the water flow is sprayed out from the nozzle 2, the nozzle 2 will contract, the second diameter d1 of the water outlet hole 21 of the nozzle 2 becomes smaller, and the speed of the water flow increases. This ensures that even if the water pressure fluctuates during the washing process, the nozzle 2 can automatically match the corresponding pressure and adjust the diameter of the water outlet hole 21 of the nozzle 2, thereby ensuring that the speed of the water flow is maintained at a high and stable level.

[0133] Example 5

[0134] like Figures 21-23As shown, this embodiment provides a spray arm 10. The structure of the spray arm 10 in this embodiment is basically the same as that of the spray arm 10 in Embodiment 1. The main difference between the two is that the nozzle 2 is disposed on the outer side of the wall 12, and the nozzle 2 also includes a main body 24. At least two first recesses are disposed on the main body 24. The main body 24 is provided with a water outlet hole 21 that communicates with the spray arm cavity 11. The wall 12 is provided with an opening 122 that communicates with the spray arm cavity 11 and the water outlet hole 21 respectively. A first protrusion is disposed on the outer surface of the wall 12. The first protrusion can be selectively inserted into any first recess. This type of spray arm 10 has a simple structure and can realize the quick positioning and disassembly of the nozzle 2 and the spray arm body 1.

[0135] Specifically, such as Figures 21-23 As shown, the longitudinal section of the first recess is an arc or a semi-circular arc, which can achieve a good wrapping effect of the first recess on the first protrusion and prevent the nozzle 2 from falling off the spray arm body 1. Furthermore, the inner surface of the first recess is partially spherical, which can achieve a good wrapping effect of the first recess on the first protrusion.

[0136] It should be noted that the first limiting member 13 and the second limiting member 23 in this embodiment can be used simultaneously as the first connecting member 121 and the second connecting member 22. Compared with the scheme of setting two sets of connecting components at the same time in Embodiment 1, the spray arm 10 in this embodiment has fewer parts, a compact structure, and is easy to assemble.

[0137] Example 6

[0138] like Figures 24-26 As shown, this embodiment provides a spray arm 10. The structure of the spray arm 10 in this embodiment is basically the same as that of the spray arm 10 in Embodiment 5. The main difference is that in this embodiment, at least two first recesses are provided on the outer surface of the wall 12, and the first protrusion is provided on the main body 24. Due to Figure 24 The outer surface of the wall 12 shown is usually facing the operator, and at least two first recesses are directly opposite the operator, which makes it easier for the operator to insert the first protrusion into the first recess that needs to be inserted, thereby improving the operator's assembly efficiency of the nozzle 2 and the spray arm body 1.

[0139] Example 7

[0140] like Figures 27-29As shown, this embodiment provides a spray arm 10. The structure of the spray arm 10 in this embodiment is basically the same as that of the spray arm 10 in embodiment five. The main difference between the two is that the outer peripheral surface of the second connector 22 is completely fitted with the side wall surface of the second recess and has an interference fit. The nozzle 2 and the spray arm body 1 are stably connected through the interference fit. The first limiting part 221 and the second limiting part 223 are eliminated. The operator only needs to apply a small force to detach the nozzle 2 from the spray arm body 1. Moreover, the structure of this spray arm 10 is simple and easy to manufacture.

[0141] As a preferred option, the outer peripheral surface of the second connector 22 can be patterned or raised to increase the static friction between the outer peripheral surface of the second connector 22 and the side wall of the second recess, thereby preventing the nozzle 2 from falling off the spray arm body 1 during the rotation of the spray arm 10.

[0142] As a preferred option, such as Figure 28 and Figure 29 As shown, in this embodiment, the first protrusion is formed by protruding from the side wall of the second recess, and the second recess is formed by inwardly recessing from the outer peripheral surface of the second connector 22. Through the cooperation of the first protrusion and the first recess, the sealing effect between the nozzle 2 and the side wall of the second recess is further improved.

[0143] Example 8

[0144] like Figures 30-31 As shown, this embodiment provides a spray arm 10. The structure of the spray arm 10 in this embodiment is basically the same as that of the spray arm 10 in embodiment seven. The main difference between the two is that the first protrusion in this embodiment is formed by the outer peripheral surface of the second connector 22 protruding outward, and the second recess is formed by the side wall surface of the second recess concave inward. Through the cooperation of the first protrusion and the first recess, the sealing effect between the nozzle 2 and the side wall surface of the second recess can be further improved.

[0145] Example 9

[0146] like Figures 32-33 As shown, this embodiment provides a spray arm 10. The structure of the spray arm 10 in this embodiment is basically the same as that of the spray arm 10 in embodiment seven. The main difference between the two is that the first protrusion is a plug plate and the first recess is a plug groove. Since the length of the first protrusion is longer, the contact area between the first protrusion and the first recess is increased, thereby further improving the stability of the connection and fixation between the nozzle 2 and the spray arm body 1.

[0147] Example 10

[0148] like Figures 34-37As shown, this embodiment provides a spray arm 10. The structure of the spray arm 10 in this embodiment is basically the same as that in the first embodiment. The main difference is that the first limiting member 13 is a second protrusion, the second limiting member 23 is a third protrusion, and at least two third protrusions are arranged along the circumferential direction. The shape of the second protrusion and the shape of the third protrusion complement each other. The second protrusion can selectively cooperate with any third protrusion, and can also realize multi-level adjustment of the spray direction of the nozzle 2. It can adapt the state of the nozzle 2 to different models of dishwashers 100. The operation is simple and convenient, so that the spray arm 10 can be adapted to different models of dishwashers 100. The adjusted spray arm 10 can cover a wide area and ensure a better cleaning effect of the dishwasher 100.

[0149] Example 11

[0150] like Figure 38 and Figure 39 As shown, this embodiment provides a spray arm 10. The structure of the spray arm 10 in this embodiment is basically the same as that in Embodiment 1. The main difference is that one of the first limiting member 13 and the second limiting member 23 is a magnetic member, and the other is a magnetic suction member. The first limiting member 13 can selectively attract any of the second limiting members 23. Since the magnetic member and the magnetic suction member can achieve stable attraction when no external force is applied, the nozzle 2 can be prevented from falling off the spray arm body 1 during the rotation of the spray arm 10. In addition, the magnetic member and the magnetic suction member can be separated when the operator rotates the nozzle 2. When the operator rotates the magnetic member to the magnetic suction member that needs to be adjusted, the operator can clearly feel the magnetic member and the magnetic suction member attracting each other. Therefore, the operator can judge that the magnetic member and the magnetic suction member are in place by feeling the magnetic attraction without relying on vision. This makes it convenient for the operator to adjust the relative position of the nozzle 2 and the spray arm body 1 in a confined space.

[0151] like Figure 38 As shown, in this embodiment, there is only one second limiting member 23, which makes the overall weight of the nozzle 2 lighter and prevents the nozzle 2 from falling off the spray arm body 1 due to excessive weight.

[0152] like Figure 39 As shown, in this embodiment, there are at least two second limiting members 23. The number of second limiting members 23 is not more than the number of first limiting members 13. Therefore, when the nozzle 2 is connected to the spray arm body 1 at a certain position, more sets of magnetic suction members and magnetic members are attracted to each other, so that the fixing effect between the nozzle 2 and the spray arm body 1 is better. When the spray arm 10 is rotating, it can prevent the nozzle 2 from falling off the spray arm body 1.

[0153] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A nozzle, characterized in that, It has a water outlet hole (21) and an air inlet hole (2221) on its side wall. The air inlet hole (2221) has a first end (22212) and a second end (22211). The first end (22212) is connected to the water outlet hole (21). The axis of the water outlet hole (21) and the axis of the air inlet hole (2221) are set at an angle. The second end (22211) is opposite to the first end. The end (22212) is located near the inlet of the water outlet (21), from the second end (22211) to the first end (22212). The axis of the air inlet (2221) is inclined toward the axis of the water outlet (21). A branch air inlet (2222) is also provided on the side wall of the water outlet (21). The two ends of the branch air inlet (2222) are respectively connected to the air inlet (2221) and the outside air.

2. The nozzle according to claim 1, characterized in that, The number of air inlet holes (2221) is at least two. The at least two air inlet holes (2221) are arranged at intervals along the flow direction of the fluid in the water outlet hole (21), or the at least two air inlet holes (2221) are arranged at intervals along the circumference of the water outlet hole (21), or the at least two air inlet holes (2221) are evenly distributed on the nozzle.

3. The nozzle according to claim 1, characterized in that, The ratio of the diameter of the air inlet (2221) to the diameter of the water outlet (21) is 1 / 100 to 1 / 2.

4. The nozzle according to claim 1, characterized in that, From the second end to the first end, the diameter of the air inlet (2221) gradually decreases.

5. The nozzle according to claim 1, characterized in that, The number of the branch air intake holes (2222) is at least two, and at least two of the branch air intake holes (2222) are connected to the corresponding air intake holes (2221).

6. The nozzle according to any one of claims 1 to 5, characterized in that, The nozzle is an elastic element, and the diameter of the water outlet hole (21) changes with the water pressure inside the spray arm cavity (11); and / or When the spray arm cavity (11) is not irrigated with water, the cross-sectional area of ​​the water outlet (21) gradually decreases along the flow direction of the water; and / or The water outlet (21) includes a guide section (211) and a straight section (212) connected sequentially along the flow direction of the water flow. The guide section (211) is a circular arc transition surface.

7. A spray arm, comprising a spray arm body (1), characterized in that, Includes a nozzle as described in any one of claims 1 to 6, the nozzle being disposed on the spray arm body (1).

8. The spray arm according to claim 7, characterized in that, The spray arm body (1) includes a wall surface (12), the spray head is mounted on the wall surface (12), and the axis of the water outlet (21) is set at an acute angle or a right angle with the wall surface (12); and / or One of the spray arm body (1) and the nozzle includes a first limiting member (13), and the other includes at least two second limiting members (23). The first limiting member (13) cooperates with any one of the at least two second limiting members (23) to ensure that the nozzle is oriented in a unique direction when assembled onto the spray arm body (1), thereby adjusting the spray direction of the nozzle so that the water jet from the nozzle is sprayed in a predetermined direction; and / or The spray arm body (1) includes a first connector (121), and the nozzle includes a second connector (22). The first connector (121) and the second connector (22) are detachably connected.

9. The spray arm according to claim 8, characterized in that, The first connector (121) and the second connector (22) are connected by a snap-fit ​​process.

10. A dishwasher, characterized in that, It includes the nozzle as described in any one of claims 1 to 6 or the spray arm as described in any one of claims 7 to 9.

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