Bubble generator of dish washing machine and dish washing machine

Abstract

The bubble generator comprises a first generator and a second generator, the first generator is provided with a channel, gas-liquid mixed fluid flows through the channel to generate bubbles, the channel comprises a first section and a second section which are communicated, in the flowing direction of the gas-liquid mixed fluid, the first section is located on the upstream of the second section, and the second section is located on the upstream of the second section; the cross-sectional area of the first section perpendicular to the flowing direction is gradually reduced along the flowing direction, and the cross-sectional area of the second section perpendicular to the flowing direction is gradually increased along the flowing direction; the second generator is located on the downstream portion of the first generator and comprises a plurality of blades, and the blades are arranged in the circumferential direction of the second generator at intervals and used for dividing bubbles in fluid flowing out of the first generator; the third generator is located on the downstream of the second generator and provided with meshes, and the meshes are used for dividing bubbles in fluid flowing out of the second generator. According to the bubble generator of the dish washing machine, high-concentration fine bubbles can be generated, and the cleaning effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of dishwashers, and more specifically, to a bubble generator and a dishwasher of a dishwasher. Background Art

[0002] As a new product integrating the functions of "washing, disinfecting, drying, and storing", cleaning tableware clean is the first task of a dishwasher. In the related art, the bubbles generated by the bubble generator of the dishwasher are large in size and low in concentration, and a large amount of dishwashing consumables are consumed to wash the tableware clean, resulting in high use costs. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. To this end, an object of the utility model is to provide a bubble generator of a dishwasher, in which the bubbles generated by the bubble generator are small in size and high in concentration, and less dishwashing consumables are consumed to wash the tableware clean, resulting in lower use costs.

[0004] Another object of the utility model is to provide a dishwasher having the above bubble generator.

[0005] The bubble generator of the dishwasher according to the embodiment of the utility model includes: a first generator, the first generator is provided with a channel, a gas-liquid mixed fluid flows through the channel to generate bubbles, the channel includes a first section and a second section that are connected and communicated, in the flowing direction of the gas-liquid mixed fluid, the first section is located upstream of the second section, the cross-sectional area of the first section perpendicular to the flowing direction gradually decreases along the flowing direction, and the cross-sectional area of the second section perpendicular to the flowing direction gradually increases along the flowing direction; a second generator, the second generator is located downstream of the first generator, the second generator includes a plurality of blades, the plurality of blades are arranged at intervals along the circumferential direction of the second generator, and the blades are used for dividing the bubbles in the fluid flowing out of the first generator; a third generator, the third generator is located downstream of the second generator, and the third generator is provided with mesh holes, and the mesh holes are used for dividing the bubbles in the fluid flowing out of the second generator.

[0006] The bubble generator of the dishwasher according to the embodiment of the utility model can sequentially perform bubble generation work on the fluid through the first generator, the second generator, and the third generator, so as to enable the fluid to generate high-concentration micro bubbles, have a better cleaning effect on tableware, and consume less dishwashing consumables, thereby reducing the use cost.

[0007] In addition, the bubble generator according to the above embodiment of the utility model may further have the following additional technical features:

[0008] According to some embodiments of the present utility model, the channel extends along the arrangement direction of the first generator and the second generator, and there are a plurality of the channels, and the plurality of channels are arranged in parallel at intervals.

[0009] According to some embodiments of the present utility model, the plurality of channels include a first channel and a plurality of second channels. In a direction perpendicular to the flow direction, the first channel is located at the center of the first generator, and the plurality of second channels are arranged at intervals around the first channel.

[0010] According to some embodiments of the present utility model, the cross-sectional area of the outlet end of the first section in the first channel is larger than the cross-sectional area of the outlet end of the first section in the second channel.

[0011] According to some embodiments of the present utility model, the channel includes a third section, the third section communicates with the first section and the second section, and the cross-sectional area of the third section perpendicular to the flow direction is equal to the cross-sectional area of the outlet end of the first section.

[0012] According to some embodiments of the present utility model, the inlet end of the second section has an annular end face, and the annular end face is perpendicular to the flow direction and extends around the inlet of the second section.

[0013] According to some embodiments of the present utility model, the blade extends parallel to the penetration direction of the channel, or the extension direction of the blade intersects with the penetration direction of the channel and is not perpendicular.

[0014] According to some embodiments of the present utility model, the second generator includes a blocking portion, and a plurality of the blades are arranged at intervals around the blocking portion.

[0015] According to some embodiments of the present utility model, the bubble generator includes a plurality of connecting columns, the connecting columns are arranged between the blocking portion and the first generator, and the space between the channel, the plurality of connecting columns, and the space between adjacent blades communicate in sequence.

[0016] According to some embodiments of the present utility model, the bubble generator includes a limiting member and a sleeve, the first generator, the second generator, the third generator, and the limiting member are sequentially arranged in the sleeve, and the first generator is fixedly connected to the sleeve; or at least the second generator, the third generator, and the limiting member are sequentially arranged in the sleeve, and the limiting member is fixedly connected to the sleeve.

[0017] The dishwasher according to the embodiment of the present utility model includes the bubble generator of the dishwasher according to the embodiment of the present utility model, the inner tank has a washing cavity, and the bubble water prepared by the bubble generator is used to be introduced into the washing cavity.

[0018] According to some embodiments of the present utility model, a water cup is provided in the inner container. The water cup has a cup outlet communicating with the washing cavity. A spraying assembly is provided in the washing cavity. The dishwasher includes a gas-liquid premixing chamber, and the gas-liquid premixing chamber is provided with a liquid inlet, a gas inlet, and an outlet. The gas inlet is used for introducing gas. Wherein, the cup outlet is communicated with the liquid inlet through a first flow path, so that the liquid in the washing cavity flows into the gas-liquid premixing chamber. The gas-liquid premixing chamber is used for mixing gas and liquid to obtain a gas-liquid mixed fluid. The bubble generator is provided at the outlet and is used for making the gas-liquid mixed fluid into bubble water. The outlet is communicated with the washing cavity to introduce the bubble water prepared by the bubble generator into the washing cavity; the cup outlet is communicated with the spraying assembly through a second flow path, so that the liquid in the washing cavity flows to the spraying assembly.

[0019] According to some embodiments of the present utility model, the outlet is provided with an internal thread, the bubble generator is provided with an external thread, the bubble generator is inserted into the outlet, and the internal thread is in threaded connection with the external thread; and / or, the bubble generator is inserted into the outlet, and a convex platform protruding inward is provided in the outlet, and the convex platform stops at the downstream of the bubble generator.

[0020] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0021] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0022] Figure 1 is a front view of a bubble generator according to a first embodiment of the present utility model;

[0023] Figure 3 is Figure 2 a cross-sectional view along the direction shown by the line A-A;

[0024] Figure 4 is a partial cross-sectional view of a bubble generator according to a second embodiment of the present utility model;

[0025] Figure 5 is a cross-sectional view of a bubble generator according to a third embodiment of the present utility model, wherein the blade is a direct-flow type;

[0026] Figure 6 is Figure 2 a cross-sectional view of, wherein the blade is a swirl type;

[0027] Figure 7 is Figure 2Cross-sectional view along the direction shown by line B-B;

[0028] Figure 8 is Figure 2 Cross-sectional view along the direction shown by line C-C;

[0029] Figure 9 Cross-sectional view of the bubble generator according to the fourth embodiment of the present utility model;

[0030] Figure 10 Front view of the bubble generator according to the fifth embodiment of the present utility model;

[0031] Figure 11 is Figure 10 Cross-sectional view;

[0032] Figure 12 Schematic diagram of a dishwasher according to an embodiment of the present utility model, wherein the driving part is a circulation pump;

[0033] Figure 13 Schematic diagram of a dishwasher according to an embodiment of the present utility model, wherein the driving part includes a water extraction pump and a circulation pump;

[0034] Figure 14 Schematic diagram of the matching structure of the gas-liquid premixing chamber and the bubble generator according to the first embodiment of the present utility model;

[0035] Figure 15 Schematic diagram of the matching structure of the gas-liquid premixing chamber and the bubble generator according to the fifth embodiment of the present utility model;

[0036] Figure 16 is Figure 15 Front view;

[0037] Figure 17 Schematic diagram of the matching structure of the gas-liquid premixing chamber and the bubble generator according to the sixth embodiment of the present utility model;

[0038] Figure 18 Schematic diagram of the size and concentration of bubbles formed in bubble water by the bubble generator according to an embodiment of the present utility model, wherein the order of magnitude of the vertical coordinate is 10 7 ;

[0039] Figure 19 Schematic diagram of the comparison of the removal rates of surface contaminants on tableware between bubble water and ordinary water made by the bubble generator according to an embodiment of the present utility model.

[0040] Reference numerals:

[0041] Dishwasher 1000; Tableware 2000; Housing 200; Dinner rack 300;

[0042] Inner container 10; washing chamber 11; spraying assembly 111; water cup 12; cup outlet 121;

[0043] Bubble generating device 20; gas-liquid premixing chamber 21; air inlet 211; liquid inlet 212; outlet 213; boss 216; connecting pipe 217; bubble generator 22;

[0044] First generator 221; channel 2211; first section 2212; second section 2213; third section 2214; annular end face 2215; first channel 2216; second channel 2217;

[0045] Second generator 222; blade 2221; blocking portion 2222; third generator 223;

[0046] Connecting column 23; limiting member 24; limiting convex portion 241; sleeve 25; external thread 251;

[0047] Driving pump 30; water pump 31; circulation pump 32; reversing valve 40; valve inlet 41; first valve outlet 42; second valve outlet 43; first flow path 61; second flow path 62; liquid inlet flow path 63. Detailed implementation mode

[0048] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0049] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0050] In the description of the present invention, "first feature" and "second feature" may include one or more of such features. The meaning of "a plurality" is two or more. The first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through other features therebetween. The first feature being "above", "above" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature.

[0051] The bubble generator 22 of the dishwasher 1000 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0052] Refer to Figures 1 - 17 As shown, the bubble generator 22 according to an embodiment of the present invention may include a first generator 221.

[0053] Specifically, the first generator 221 is provided with a channel 2211, and the gas-liquid mixed fluid flows through the channel 2211 to generate bubbles. The channel 2211 includes a first section 2212 and a second section 2213 that are connected and communicate with each other. In the flow direction of the gas-liquid mixed fluid (for example, Figures 1 - 2 the direction from left to right as shown), the first section 2212 is located upstream of the second section 2213. The cross-sectional area of the first section 2212 perpendicular to the flow direction gradually decreases along the flow direction, and the cross-sectional area of the second section 2213 perpendicular to the flow direction gradually increases along the flow direction.

[0054] The gas-liquid mixed fluid is a fluid formed by mixing gas and liquid. The gas-liquid mixed fluid flows through the first section 2212 and the second section 2213 in sequence. In the flow direction, the first section 2212 is a contraction section, which makes the flow velocity of the fluid in the first section 2212 gradually increase and the pressure gradually increase to increase the gas solubility in the fluid. The second section 2213 is an expansion section, which makes the pressure of the fluid in the second section 2213 gradually decrease, and the gas is released from the fluid to generate a large number of bubbles in the fluid.

[0055] The bubble generator 22 further includes a second generator 222, and the second generator 222 is located downstream of the first generator 221. The second generator 222 includes a plurality of blades 2221, and the blades 2221 are used to divide the bubbles in the fluid flowing out of the first generator 221.

[0056] The plurality of blades 2221 means that the blades 2221 can be two, three or more. More bubbles can be cut by the plurality of blades 2221, which is beneficial to dispersing more bubbles into smaller bubbles. And the plurality of blades 2221 are arranged at intervals along the circumferential direction of the second generator 222, so that the fluid flows more uniformly to the plurality of blades 2221, and more bubbles are divided by the plurality of blades 2221. Moreover, the fluid flowing out of the first generator 221 contains a large number of bubbles through the first section 2212 and the second section 2213. Therefore, more bubbles are divided by the blades 2221, and thus a large number of smaller-sized bubbles can be generated.

[0057] The bubble generator 22 further includes a third generator 223 which is located downstream of the second generator 222. The third generator 223 is provided with mesh holes for dividing the bubbles in the fluid flowing out of the second generator 222. The third generator 223 may include a plurality of mesh holes with smaller sizes to cut the bubbles in the fluid, further dividing the smaller-sized bubbles in the fluid flowing out of the second generator into even smaller micro-bubbles, so as to generate high-concentration micro-bubbles.

[0058] In some related technologies, a dishwasher uses bubble water in combination with dishwashing consumables to clean tableware. The bubble water has a good ability to clean oil stains. However, the bubbles generated by the bubble generator of the dishwasher are relatively large in size and low in concentration, resulting in a poor cleaning effect on the tableware and the need to consume a large amount of dishwashing consumables (such as dishwashing powder, rinse aid or dishwashing liquid, etc.), with a high usage cost.

[0059] In this application, by making the fluid flow through the first generator 221, the second generator 222 and the third generator 223 in sequence, at least three different levels of bubble generation work can be performed on the fluid in sequence. Moreover, the generator located downstream can generate smaller-sized bubbles and more bubbles compared to the generator located upstream, achieving a progressive effect of generating high-concentration micro-bubbles in the fluid, making the fluid generate a large number of micro-bubbles with smaller sizes and higher concentrations, having a better cleaning effect on the tableware 2000, and thus consuming less dishwashing consumables and having a lower usage cost.

[0060] In addition, the bubble generator 22 includes a first generator 221, a second generator 222 and a third generator 223. The first generator 221 is provided with a channel 2211, the second generator 222 includes blades 2221, and the third generator 223 is provided with mesh holes. The structures of the three-level generators (i.e., the first generator 221, the second generator 222 and the third generator 223) are relatively simple, making the internal structure of the bubble generator 22 relatively simple and having a lower cost.

[0061] According to the bubble generator 22 of the dishwasher 1000 according to the embodiment of the present utility model, by performing bubble generation work on the fluid through the first generator 221, the second generator 222 and the third generator 223 in sequence, high-concentration micro-bubbles can be generated in the fluid, having a better cleaning effect on the tableware 2000, consuming less dishwashing consumables, and reducing the usage cost.

[0062] In some embodiments of the present utility model, such as Figures 2 - 4As shown, the channel 2211 extends along the arrangement direction of the first generator 221 and the second generator 222. For example, the arrangement direction of the first generator 221 and the second generator 222 is parallel or at a certain angle to the extension direction of the channel 2211, facilitating the fluid in the channel 2211 to flow out of the first generator 221 and then easily flow into the second generator 222, making the flow of the fluid between the first generator 221 and the second generator 222 smoother.

[0063] There are multiple channels 2211, and the multiple channels 2211 are arranged side by side at intervals, forming a parallel structure. A fluid with a relatively large flow rate is divided into multiple fluids with relatively small flow rates to be shunted into the multiple parallel channels 2211. Multiple fluids can be processed respectively through the multiple channels 2211, enabling each fluid with a relatively small flow rate to generate a large number of bubbles respectively, and further enabling the first generator 221 to generate a larger number of bubbles. Moreover, the multiple channels 2211 arranged side by side at intervals are not easily blocked simultaneously, which can reduce the risk of the first generator 221 being completely blocked and improve the working reliability of the first generator 221.

[0064] In some embodiments, as Figures 2 - 4 shown, the multiple channels 2211 include a first channel 2216 and multiple second channels 2217. In the direction perpendicular to the flow direction, the first channel 2216 is located at the center of the first generator 221, and the multiple second channels 2217 are arranged at intervals around the first channel 2216, enabling a fluid with a relatively large flow rate to be more evenly divided into multiple fluids with relatively small flow rates, which is conducive to making full use of each channel 2211 to enable the fluid to generate a large number of bubbles.

[0065] In some embodiments, as Figures 2 - 3 shown, in the direction perpendicular to the flow direction, the multiple second channels 2217 are arranged at uniform intervals around the first channel 2216, enabling the fluid to flow more evenly to each channel 2211 and having a higher utilization rate for each channel 2211.

[0066] The fluid may carry impurities such as pollutant particles, for example, food residues remaining on the tableware 2000, which may block the channel 2211. Generally, the impurities in the fluid are in the middle of the fluid. In some embodiments, as Figure 4 shown, the cross-sectional area of the outlet end of the first section 2212 in the first channel 2216 is larger than the cross-sectional area of the outlet end of the first section 2212 in the second channel 2217, enabling the impurities that may be carried in the fluid to easily flow towards the first channel 2216 with a larger flow-through area. The first channel 2216 is not easily blocked, which can reduce the risk of the first generator 221 being blocked and improve the working reliability of the first generator 221.

[0067] In some embodiments, the channel 2211 is a cylindrical channel, and the diameter of the outlet end of the first section 2212 is 0.5 - 2 mm. If the diameter of the outlet end of the first section 2212 is too large, it is likely to result in too low a gas dissolution amount of the fluid in the first section 2212, and then too few bubbles are generated by the fluid in the first generator 221. If the diameter is too small, the channel 2211 is likely to be blocked. By setting the diameter of the outlet end of the first section 2212 to be 0.5 - 2 mm, it is beneficial to prevent the first section 2212 from being blocked and to have a relatively high gas dissolution amount of the fluid in the first section 2212, so as to increase the amount of bubbles generated by the fluid in the first generator 221. For example, the diameter of the outlet end of the first section 2212 can be 0.5 mm, 0.6 mm, 0.9 mm, 2 mm, etc.

[0068] In some embodiments of the present utility model, as Figure 2 shown, the channel 2211 includes a third section 2214. The third section 2214 communicates with the first section 2212 and the second section 2213. The cross-sectional area of the third section 2214 perpendicular to the flow direction is equal to the cross-sectional area of the outlet end of the first section 2212, so that the fluid flowing through the channel 2211 can continue to flow in the third section 2214 with a smaller flow-through area after flowing through the first section 2212, resulting in a faster fluid velocity, a greater pressure, a larger gas dissolution amount of the fluid, and a greater number of bubbles that can be generated after the fluid flows into the second section 2213, which is beneficial to increasing the amount of bubbles generated by the fluid in the first generator 221.

[0069] In some embodiments, as Figure 2 shown, the inlet end of the second section 2213 has an annular end face 2215. The annular end face 2215 is perpendicular to the flow direction and extends around the inlet of the second section 2213, so that the flow-through area suddenly increases when the fluid flows into the second section 2213, which can reduce the risk of the fluid generating swirl and damaging the channel 2211, and is beneficial to protecting the first generator 221. And it is convenient to distinguish the inlet end of the second section 2213 from the outlet end upstream of the second section 2213, so as to facilitate workers to manufacture different sections of the channel 2211.

[0070] In some embodiments of the present utility model, as Figure 5 shown, the blade 2221 extends parallel to the penetration direction of the channel 2211, so that the blade 2221 is formed as a straight-through type, which is beneficial to reducing the manufacturing difficulty of the second generator 222.

[0071] In some other embodiments, as Figure 2 and Figure 6As shown, the extending direction of the blade 2221 intersects with the penetrating direction of the channel 2211 and is not perpendicular, causing the blade 2221 to form a swirl type. In the fluid flow direction, the fluid flowing through the starting end of the blade 2221 is divided by the blade 2221, and after being divided by the starting end of the blade 2221, the fluid is likely to collide with the side surface of the blade 2221, which is conducive to further dispersing the bubbles in the fluid into smaller-sized bubbles through the side surface of the blade 2221, making the bubbles generated by the fluid in the second generator 222 smaller in size and more in number.

[0072] In some embodiments of the present utility model, as Figures 2 - 3 and Figures 5 - 6 shown, the second generator 222 includes a blocking portion 2222, and a plurality of blades 2221 are arranged at intervals around the blocking portion 2222. The blade 2221 and the blocking portion 2222 can be an integral part or a separate part.

[0073] By blocking the fluid with the blocking portion 2222, the fluid flowing into the second generator 222 first collides with the blocking portion 2222, so that the bubbles in the fluid are dispersed into smaller-sized bubbles, and then the fluid flows to the plurality of blades 2221 on the outer periphery of the blocking portion 2222. By dispersing the bubbles successively through the blocking portion 2222 and the blades 2221, the bubbles generated by the fluid in the second generator 222 are smaller in size and more in number.

[0074] In some embodiments, as Figures 2 - 3 and Figure 7 shown, the bubble generator 22 includes a plurality of connecting columns 23. The connecting columns 23 are arranged between the blocking portion 2222 and the first generator 221. The space between the channel 2211, the plurality of connecting columns 23, and the space between adjacent blades 2221 are communicated in sequence, so that the fluid flowing out of the channel 2211 can flow to the space between the plurality of connecting columns 23 and then to the space between adjacent blades 2221. It is not easy to block between the channel 2211 and the second generator 222, improving the working reliability of the bubble generator 22. Through the plurality of connecting columns 23, the first generator 221 and the second generator 222 can also be connected, making the connection between the first generator 221 and the second generator 222 firm.

[0075] In some embodiments of the present utility model, as Figure 2 and Figure 8 shown, the bubble generator 22 includes a limiting member 24 and a sleeve 25. The first generator 221, the second generator 222, the third generator 223, and the limiting member 24 are sequentially arranged in the sleeve 25, and the first generator 221 is fixedly connected to the sleeve 25. In this application, the fixed connection between the two can include connection methods such as welding or riveting, or it can also mean that the two are integral parts.

[0076] The first generator 221, the second generator 222, and the third generator 223 can be assembled into a whole through the sleeve 25, facilitating the fluid to flow through the first generator 221, the second generator 222, and the third generator 223 in sequence to generate high-concentration microbubbles. The third generator 223 can be limited by the limiting member 24. For example, the limiting member 24 presses against the third generator 223, making it difficult for the third generator 223 to deform or fall off the sleeve 25 under the impact of the fluid, enabling the bubble generation operation of the third generator 223 to proceed stably.

[0077] In some embodiments, as Figure 2 shown, a limiting convex portion 241 is provided on the side of the limiting member 24 facing away from the third generator 223. The limiting convex portion 241 is connected to the sleeve 25. Through the limiting convex portion 241, the limiting member 24 can be pressed tightly, thereby pressing tightly the third generator 223, making it difficult for the third generator 223 to deform or shake, and making the operation of the third generator 223 more stable.

[0078] In some embodiments, as Figure 9 shown, the first generator 221, the second generator 222, the third generator 223, and the limiting member 24 are sequentially arranged in the sleeve 25, and the limiting member 24 is fixedly connected to the sleeve 25. It is convenient to sequentially install the third generator 223, the second generator 222, and the first generator 221 into the sleeve 25 along the flow direction of the fluid, and the limiting member 24 is used to limit the three-stage generators (i.e., the first generator 221, the second generator 222, and the third generator 223), making it difficult for the three-stage generators to deform or fall off the sleeve 25 under the impact of the fluid, making the operation of the three-stage generators more stable, and facilitating the assembly of the three-stage generators into a whole through the sleeve 25.

[0079] In some embodiments, as Figures 10 - 11 shown, the second generator 222, the third generator 223, and the limiting member 24 are sequentially arranged in the sleeve 25, and the limiting member 24 is fixedly connected to the sleeve 25, so as to sequentially install the third generator 223 and the second generator 222 into the sleeve 25 along the flow direction of the fluid, and the limiting member 24 is used to limit the third generator 223 and the second generator 222, making it difficult for the third generator 223 and the second generator 222 to deform or fall off the sleeve 25 under the impact of the fluid, and making the operation of the third generator 223 and the second generator 222 more stable. The first generator 221 is arranged outside the sleeve 25, making the connection relationship between the first generator 221 and the second generator 222 less likely to be restricted by the sleeve 25, facilitating the operation of connecting the first generator 221 and the second generator 222, and helping to reduce the manufacturing difficulty of the bubble generator 22.

[0080] The dishwasher 1000 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0081] As Figures 12 - 17 shown, the dishwasher 1000 according to an embodiment of the present invention includes an inner container 10 and a bubble generator 22 according to an embodiment of the present invention. The inner container 10 has a washing cavity 11. The bubble water produced by the bubble generator 22 is used to be introduced into the washing cavity 11 to wash the tableware 2000 in the washing cavity 11 through the bubble water. Since the bubble generator 22 according to an embodiment of the present invention has the above beneficial technical effects, the dishwasher 1000 according to an embodiment of the present invention can make the fluid generate high-concentration micro bubbles by the first generator 221, the second generator 222 and the third generator 223 working on the fluid in sequence, has a better cleaning effect on the tableware 2000, and consumes less dishwashing consumables, reducing the use cost.

[0082] In some embodiments of the present invention, as Figures 12 - 13 shown, the inner container 10 is provided with a water cup 12. The water cup 12 has a cup outlet 121 communicating with the washing cavity 11. A spraying assembly 111 is provided in the washing cavity 11. The dishwasher 1000 includes a gas-liquid premixing chamber 21. The gas-liquid premixing chamber 21 is provided with a liquid inlet 212, a gas inlet 211 and an outlet 213. The gas inlet 211 is used to introduce gas.

[0083] Among them, the cup outlet 121 is communicated with the liquid inlet 212 through a first flow path 61 so that the liquid in the washing cavity 11 flows into the gas-liquid premixing chamber 21. The gas-liquid premixing chamber 21 is used to mix gas and liquid to obtain a gas-liquid mixed fluid. The bubble generator 22 is arranged at the outlet 213 and is used to make the gas-liquid mixed fluid into bubble water. The outlet 213 is communicated with the washing cavity 11 to introduce the bubble water produced by the bubble generator 22 into the washing cavity 11; the cup outlet 121 is communicated with the spraying assembly 111 through a second flow path 62 so that the liquid in the washing cavity 11 flows to the spraying assembly 111.

[0084] The spraying assembly 111 may include a spray arm, a spray head or any other structure that can be used to spray liquid. Through the spraying assembly 111, liquid can be sprayed onto the tableware 2000 in the washing cavity 11 to wash the tableware 2000. The liquid here can be water containing dishwashing consumables, or can be clean water or other liquids.

[0085] After the liquid in the washing cavity 11 flows out of the washing cavity 11 from the cup outlet 121, it can flow into the gas-liquid premixing chamber 21 and the bubble generator 22 through the first flow path 61 to be made into bubble water and then introduced into the washing cavity 11 again, or can also flow into the spraying assembly 111 through the second flow path 62 and be sprayed onto the tableware 2000 to enter the washing cavity 11 again, realizing the reuse of the liquid in the washing cavity 11, reducing the consumption of water resources and dishwashing consumables, and having a lower use cost.

[0086] Liquid is introduced into the gas-liquid premixing chamber 21 through the liquid inlet 212, and gas is introduced into the gas-liquid premixing chamber 21 through the gas inlet 211, so as to pre-mix the gas and the liquid into a gas-liquid mixed fluid in the gas-liquid premixing chamber 21, and then the gas-liquid mixed fluid is introduced into the bubble generator 22 at the outlet 213, which shortens the time for the gas and the liquid to be mixed in the bubble generator 22 to generate bubbles, is beneficial to improving the efficiency of the bubble generating device 20 to make bubble water, and has a higher cleaning efficiency for the tableware 2000.

[0087] Through the repeated utilization of the liquid in the washing chamber 11 along the first flow path 61, bubble water can be continuously made during the whole process of washing the tableware 2000 to continuously introduce bubble water into the washing chamber 11. Each time bubble water is made by the bubble generating device 20, the bubble content in the bubble water can be increased, and the cleaning effect on the tableware 2000 is better. Combined with the repeated utilization of the liquid in the washing chamber 11 along the second flow path 62, the liquid such as bubble water can be continuously sprayed onto the tableware 2000 through the spraying component 111 during the whole process of washing the tableware 2000, so as to continuously generate bubble water and wash the tableware 2000 with the bubble water. The bubble content of the liquid in the washing chamber 11 is high, and the cleaning effect on the tableware 2000 is better.

[0088] In some embodiments, such as Figures 12 - 13 As shown, the dishwasher 1000 includes a liquid inlet flow path 63, and the liquid inlet flow path 63 communicates with the water source and the liquid inlet 212 to supply water to the bubble generating device 20. The water source can be a water source outside the dishwasher 1000, such as tap water from a faucet, or the water in a water tank that may exist inside the dishwasher 1000.

[0089] By supplying water to the bubble generating device 20 through the liquid inlet flow path 63, bubble water can be made by the bubble generating device 20 while supplying water, so as to make bubble water during the water supply stage and directly introduce the bubble water into the washing chamber 11. Combined with the bubble generating device 20 reusing the liquid in the washing chamber 11 through the first flow path 61 to make bubble water and then introducing it into the washing chamber 11, bubble water can be continuously made during the water supply stage and the washing cycle stage, and the cleaning effect on the tableware 2000 in the washing chamber 11 is better.

[0090] In some embodiments of the present utility model, such as Figures 12 - 13 As shown, the dishwasher 1000 includes a driving pump 30. The driving pump 30 is arranged downstream of the cup outlet 121, and the driving pump 30 is used to drive the liquid flowing out of the cup outlet 121 to flow towards the liquid inlet 212 and the spraying component 111. The driving pump 30 can be a pump or other components used to drive the liquid to flow.

[0091] By driving the pump 30, the hydraulic pressure can be increased, which is beneficial to making the liquid in the washing chamber 11 flow toward the liquid inlet 212 and fully mix with the gas in the bubble generating device 20, thereby improving the efficiency of the bubble generating device 20 in producing bubble water. By driving the pump 30, a large amount of liquid can also be driven to flow toward the spraying assembly 111 to spray onto the tableware 2000, reducing the possibility of uneven spraying of the tableware 2000 due to insufficient liquid content in the spraying assembly 111 and achieving a better cleaning effect on the tableware 2000.

[0092] In some embodiments, as Figure 12 shown, the driving pump 30 is a circulation pump 32. The dishwasher 1000 includes a reversing valve 40 which has a valve inlet 41, a first valve outlet 42 and a second valve outlet 43. The circulation pump 32 is connected between the valve inlet 41 and the cup outlet 121. The first valve outlet 42 communicates with the first flow path 61, and the second valve outlet 43 communicates with the second flow path 62. The reversing valve 40 is used to control the on states of the first valve outlet 42 and the second valve outlet 43 respectively with the valve inlet 41.

[0093] By driving the liquid flow with one circulation pump 32, the number of driving pumps 30 is small, the cost is low, and the economy is good. And through the reversing valve 40, one circulation pump 32 can separately control the on states of the first flow path 61 and the second flow path 62 with the cup outlet 121 respectively, so as to realize two circulating flow states of the liquid in the washing chamber 11 through the first flow path 61 and the second flow path 62 respectively. For example, making the first flow path 61 communicate with the cup outlet 121 is beneficial to increasing the hydraulic pressure in the first flow path 61 to improve the efficiency of the bubble generating device 20 in producing bubble water. For example, making the second flow path 62 communicate with the cup outlet 121 is beneficial to increasing the liquid flow rate in the second flow path 62 to make the spraying assembly 111 spray the tableware 2000 in place, improving the working reliability of the first flow path 61 and the second flow path 62.

[0094] In some embodiments, as Figure 13 shown, the driving pump 30 includes a water extraction pump 31 and a circulation pump 32. The pump inlet of the water extraction pump 31 communicates with the cup outlet 121 of the water cup 12, and the pump inlet of the water extraction pump 31 communicates with the first flow path 61. The pump inlet of the circulation pump 32 communicates with the cup outlet 121 of the water cup 12, and the pump inlet of the circulation pump 32 communicates with the second flow path 62.

[0095] The cup outlet 121 can be one opening or multiple openings on the water cup 12. For example, when the cup outlet 121 is one opening on the water cup 12, the opening can be connected to the water extraction pump 31 and the circulation pump 32 through a tee pipe. For example, the cup outlet 121 can also be two openings on the water cup 12, and the two openings can be respectively connected to the water extraction pump 31 and the circulation pump 32.

[0096] The water pump 31 can drive the liquid in the washing chamber 11 to flow from the cup outlet 121 to the first flow path 61, so as to control the hydraulic pressure in the first flow path 61. The circulation pump 32 can drive the liquid in the washing chamber 11 to flow from the cup outlet 121 to the second flow path 62, so as to control the liquid flow rate in the second flow path 62, realizing precise control of the first flow path 61 and the second flow path 62, and making the operation of the first flow path 61 and the second flow path 62 more stable.

[0097] In addition, the water pump 31 and the circulation pump 32 can simultaneously conduct the cup outlet 121 with the first flow path 61 and the cup outlet 121 with the second flow path 62, so as to simultaneously make bubble water through the bubble generating device 20 and clean the tableware 2000 through the spraying assembly 111, improving the cleaning efficiency of the tableware 2000.

[0098] In some embodiments, such as Figures 1 - 9 and Figure 14 shown, the outlet 213 is provided with an internal thread, and the bubble generator 22 is provided with an external thread 251. The bubble generator 22 is inserted into the outlet 213, and the internal thread is threadedly connected to the external thread 251, so that the bubble generator 22 is threadedly connected to the gas-liquid premixing chamber 21, which is convenient for disassembly and assembly and has a firm connection, and is also convenient for subsequent maintenance or replacement.

[0099] In some embodiments, such as Figures 10 - 11 and 15- Figure 17 shown, the bubble generator 22 is inserted into the outlet 213, and the outlet 213 is provided with a convex platform 216 protruding inward. The convex platform 216 stops at the downstream of the bubble generator 22. The convex platform 216 makes the bubble generator 22 not easily fall outside the gas-liquid premixing chamber 21 under the impact of the fluid, and makes the bubble generator 22 not easily fall into the gas-liquid premixing chamber 21 under the impact of the fluid, making the connection between the bubble generator 22 and the gas-liquid premixing chamber 21 firm, and the structure is simple and easy to implement.

[0100] In some embodiments, such as Figures 15 - 17 shown, a connecting pipe 217 is provided at the outlet 213. The connecting pipe 217 is fixedly connected to the convex platform 216 and extends away from the bubble generator 22 along the extending direction of the outlet 213, so as to guide the bubble water made by the bubble generator 22, and make the bubble water enter the washing chamber 11 through the connecting pipe 217, which is beneficial to controlling the flow path of the bubble water. For example, the end of the connecting pipe 217 facing away from the bubble generator 22 is close to the position where the tableware 2000 is located, so that more bubble water flows to the surface of the tableware 2000, and the cleaning effect on the tableware 2000 is better.

[0101] In some embodiments, such as Figures 15 - 17 shown, the outer periphery of the bubble generator 22 and the inner wall of the outlet 213 are in interference fit, making the connection between the bubble generator 22 and the gas-liquid premixing chamber 21 more firm. It should be noted thatFigures 15 - 17 A gap is shown between the bubble generator 22 and the inner wall of the outlet 213. For ease of understanding only, in reality, there is an interference fit between the two.

[0102] In some embodiments, a sealing ring is provided upstream of the bubble generator 22. The sealing ring is snap - fitted between the outer periphery of the bubble generator 22 and the inner wall of the outlet 213, making the connection between the bubble generator 22 and the gas - liquid premixing chamber 21 firm.

[0103] Next, the bubble generator 22 and the dishwasher 1000 according to a specific embodiment of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the following description is only an exemplary illustration and should not be construed as a limitation of the invention.

[0104] As Figures 1 - 3 、 Figures 6 - 8 、 Figure 12 and Figure 14 shown, the dishwasher 1000 according to the first embodiment of the present invention includes a housing 200, a dish rack 300, an inner tank 10, and a bubble generating device 20.

[0105] The inner tank 10 is disposed inside the housing 200. The dish rack 300 is disposed inside the washing cavity 11 of the inner tank 10. The dish rack 300 is used for placing tableware 2000. A spraying assembly 111 is provided inside the washing cavity 11. The inner tank 10 is provided with a water cup 12, and the water cup 12 has a cup outlet 121 communicating with the washing cavity 11.

[0106] The bubble generating device 20 is disposed between the housing 200 and the inner tank 10. The bubble generating device 20 includes a gas - liquid premixing chamber 21 and a bubble generator 22. The gas - liquid premixing chamber 21 is provided with an outlet 213, an air inlet 211 for introducing gas, and a liquid inlet 212 for introducing liquid. The gas - liquid premixing chamber 21 is used for mixing gas and liquid to obtain a gas - liquid mixture and introducing the gas - liquid mixture into the bubble generator 22. The bubble generator 22 is disposed at the outlet 213 by means of a threaded connection.

[0107] The outlet 213 of the gas - liquid premixing chamber 21 is provided with an internal thread, and the outer periphery of the bubble generator 22 is provided with an external thread 251. The bubble generator 22 is inserted into the outlet 213 to achieve a threaded connection through the internal thread and the external thread 251, which is convenient for disassembly and assembly.

[0108] The outlet 213 communicates with the washing cavity 11. The bubble generator 22 is used for making the gas - liquid mixture into bubble water and then introducing it into the washing cavity 11.

[0109] In the bubble generator 22, the fluid generally flows from left to right. The bubble generator 22 includes a first generator 221, a second generator 222, and a third generator 223 arranged from left to right and connected in sequence. The first generator 221 is provided with a channel 2211. The channel 2211 includes a first section 2212, a third section 2214, and a second section 2213 arranged from left to right and connected in sequence. The cross-sectional area of the first section 2212 perpendicular to the left-right direction gradually decreases from left to right to form a contraction section. The cross-sectional area of the third section 2214 perpendicular to the left-right direction is equal to the cross-sectional area of the outlet end of the first section 2212. The cross-sectional area of the second section 2213 perpendicular to the left-right direction gradually increases from left to right to form an expansion section. The inlet end of the second section 2213 has an annular end face 2215. The annular end face 2215 is perpendicular to the left-right direction and extends inwardly around the inlet end of the second section 2213.

[0110] The channel 2211 includes a first channel 2216 and four second channels 2217 arranged side by side at intervals. In the direction perpendicular to the left-right direction, the first channel 2216 is located at the center of the first generator 221, and the four second channels 2217 are arranged evenly spaced around the first channel 2216.

[0111] The second generator 222 includes a blocking portion 2222 and eight vanes 2221. The eight vanes 2221 are arranged at intervals around the blocking portion 2222. As Figure 6 shown, the vanes 2221 extend to the left and in the counterclockwise direction to form a swirling flow type. The third generator 223 is a mesh structure provided with mesh holes.

[0112] The bubble generator 22 further includes four connecting columns 23. The connecting columns 23 are provided between the first generator 221 and the second generator 222 to connect the first generator 221 and the second generator 222. The space between the channel 2211, the four connecting columns 23, and the space between adjacent vanes 2221 are connected in sequence from left to right.

[0113] The bubble generator 22 further includes a limiting member 24, a limiting convex portion 241, and a sleeve 25. The first generator 221, the second generator 222, the third generator 223, and the limiting member 24 are sequentially arranged in the sleeve 25, and the first generator 221 and the sleeve 25 are an integral part. During the process of assembling the bubble generator 22, the second generator 222, the third generator 223, the limiting member 24, and the limiting convex portion 241 are inserted into the sleeve 25 from right to left in sequence to achieve an interference fit. The third generator 223 is limited by the limiting member 24, and the limiting member 24 is limited by the limiting convex portion 241.

[0114] During the process of the dishwasher 1000 cleaning the tableware 2000, liquid is supplied to the gas-liquid premixing chamber 21 through the liquid inlet flow path 63, that is, liquid is introduced, and gas is introduced into the gas-liquid premixing chamber 21 through the gas inlet 211. The liquid and gas are mixed in the gas-liquid premixing chamber 21 to obtain a gas-liquid mixed fluid, and the gas-liquid mixed fluid enters the bubble generator 22 and is made into bubble water in the bubble generator 22.

[0115] Specifically, in the first generator 221, the gas-liquid mixed fluid flows into the first channel 2216 and the second channel 2217, and the gas solubility of the fluid is increased through the first section 2212 and the third section 2214. Then, the fluid releases gas through the second section 2213 to generate a large number of bubbles.

[0116] After the fluid of the first generator 221 flows into the second generator 222, the bubbles in the fluid are dispersed into smaller-sized bubbles by colliding with the fluid through the blocking portion 2222. Then, the fluid flows to a plurality of blades 2221 on the outer periphery of the blocking portion 2222, and the bubbles are divided into smaller-sized bubbles by the blades 2221.

[0117] After the fluid of the second generator 222 flows into the third generator 223, the bubbles are further divided into smaller-sized bubbles by the mesh holes of the third generator 223. The bubble generation work is sequentially performed on the fluid through the first generator 221, the second generator 222, and the third generator 223, so that the fluid generates high-concentration fine bubbles to make bubble water. The bubble water enters the washing cavity 11 from the outlet 213 to clean the tableware 2000. The bubble water with high-concentration fine bubbles has a better cleaning effect on the tableware 2000, which is beneficial to improving the cleaning ability of the dishwasher 1000 and reducing dishwashing consumables.

[0118] As Figure 18 shown, by using the bubble generator 22 of the first embodiment of the present utility model, through the first generator 221, the second generator 222, and the third generator 223, the fluid can generate high-concentration fine bubbles with an average size (such as the bubble diameter) of 100-200 nm and a concentration of 1*10 7 ~9*10 7 per ml, and the bubble water with high-concentration fine bubbles made has a better cleaning effect on the tableware 2000.

[0119] As Figure 19As shown in the figure, within the same cleaning time, when using ordinary water without bubbles to clean the tableware 2000, the average removal rate of surface contaminants on the tableware 2000 is 59.5%. While using the bubble water made by the bubble generator 22 in the first embodiment of the present utility model to clean the tableware 2000, the average removal rate of surface contaminants on the tableware 2000 is 67.3%. The bubble water made in this application has a better cleaning effect on the tableware 2000. Even if the cleaning time of the bubble water made by the bubble generator 22 in the first embodiment of the present utility model for cleaning the tableware 2000 is shortened by 10% year-on-year compared with the cleaning time of ordinary water, the average removal rate of surface contaminants on the tableware 2000 by the bubble water made by the bubble generator 22 in the first embodiment of the present utility model can still reach 61.1%, and the cleaning effect on the tableware 2000 is still better than that of ordinary water cleaning.

[0120] Therefore, the bubble water made by the bubble generator 22 in the first embodiment of the present utility model has a good cleaning effect on cleaning the tableware 2000, consumes less dishwashing consumables, and has a good cleaning effect.

[0121] As Figure 4 shown, the bubble generator 22 and the dishwasher 1000 according to the second embodiment of the present utility model are different from the bubble generator 22 and the dishwasher 1000 of the first embodiment in that the first channel 2216 includes a first section 2212 and a second section 2213, the second section 2213 in the first channel 2216 pipe does not have an annular end face 2215, the second channel 2217 includes a first section 2212, a third section 2214 and a second section 2213, the second section 2213 in the second channel 2217 has an annular end face 2215, and the cross-sectional area of the right end of the first section 2212 in the first channel 2216 is larger than the cross-sectional area of the right end of the first section 2212 in the second channel 2217, which can increase the flow area of the first channel 2216 and is beneficial to reducing the risk of blockage of the first generator 221.

[0122] As Figure 5 shown, the bubble generator 22 and the dishwasher 1000 according to the third embodiment of the present utility model are different from the bubble generator 22 and the dishwasher 1000 of the first embodiment in that the blade 2221 extends in the left-right direction to form a direct-flow type, which is beneficial to simplifying the structure of the second generator 222 and reducing the manufacturing difficulty.

[0123] As Figure 9As shown, the bubble generator 22 and the dishwasher 1000 according to the fourth embodiment of the present utility model are different from the bubble generator 22 and the dishwasher 1000 of the first embodiment in that the limiting member 24, the limiting convex portion 241 and the sleeve 25 are an integral part. During the assembly process of the bubble generator 22, the third generator 223, the second generator 222 and the first generator 221 are inserted into the sleeve 25 from left to right in sequence to achieve an interference fit. And the fluid in the bubble generator 22 generally flows from left to right, which can utilize the impact force of the fluid to make the installation of the third generator 223, the second generator 222 and the first generator 221 in the sleeve 25 more secure and not easy to fall off.

[0124] As Figures 10 - 11 and Figures 15 - 16 shown, the bubble generator 22 and the dishwasher 1000 according to the fifth embodiment of the present utility model are different from the bubble generator 22 and the dishwasher 1000 of the first embodiment in that the second generator 222, the third generator 223 and the limiting member 24 are sequentially arranged in the sleeve 25, and the limiting member 24 is fixedly connected to the sleeve 25. During the assembly process of the bubble generator 22, the third generator 223 and the second generator 222 are inserted into the sleeve 25 from left to right in sequence to achieve an interference fit, and the first generator 221 and the second generator 222 are connected by the connecting column 23, which is beneficial to reducing the assembly difficulty of the bubble generator 22.

[0125] The inner wall of the outlet 213 is not provided with an internal thread, and a convex platform 216 protruding inward is provided in the outlet 213. The convex platform 216 stops at the downstream of the bubble generator 22. The bubble generator 22 is inserted into the outlet 213 and abuts against the convex platform 216 to achieve an interference fit between the bubble generator 22 and the inner wall of the outlet 213. Through the convex platform 216, the bubble generator 22 is not easy to fall to the outside of the gas-liquid premixing chamber 21 to the right under the impact of the fluid, and the bubble generator 22 is not easy to fall into the inside of the gas-liquid premixing chamber 21 to the left under the impact of the fluid, making the connection between the bubble generator 22 and the gas-liquid premixing chamber 21 firm.

[0126] As Figure 17 shown, the bubble generator 22 and the dishwasher 1000 according to the sixth embodiment of the present utility model are different from the bubble generator 22 and the dishwasher 1000 of the fifth embodiment in that the first generator 221, the second generator 222, the third generator 223 and the limiting member 24 are sequentially arranged in the sleeve 25, and the limiting member 24 is fixedly connected to the sleeve 25., which is beneficial to assembling the first generator 221, the second generator 222 and the third generator 223 into a whole through the sleeve 25, making it not easy for relative movement to occur between the first generator 221, the second generator 222 and the third generator 223, and facilitating the fluid to sequentially flow through the first generator 221, the second generator 222 and the third generator 223 to generate high-concentration micro bubbles.

[0127] The bubble generator 22 according to the embodiments of the present utility model, as well as other components and operations of the dishwasher 1000, are known to those of ordinary skill in the art and will not be described in detail herein.

[0128] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0129] In the description of this specification, the descriptions referring to terms such as "embodiment", "specific embodiment", "example", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0130] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A bubble generator for a dishwasher, characterized in that, Comprising: A first generator, the first generator being provided with a channel through which a gas-liquid mixed fluid flows to generate bubbles. The channel includes a first section and a second section that are connected and communicate with each other. In the flow direction of the gas-liquid mixed fluid, the first section is located upstream of the second section. The cross-sectional area of the first section perpendicular to the flow direction gradually decreases along the flow direction, and the cross-sectional area of the second section perpendicular to the flow direction gradually increases along the flow direction. A second generator, the second generator being located downstream of the first generator. The second generator includes a plurality of blades, and the plurality of blades are arranged at intervals along the circumferential direction of the second generator. The blades are used to divide the bubbles in the fluid flowing out of the first generator. A third generator, the third generator being located downstream of the second generator. The third generator is provided with mesh holes, and the mesh holes are used to divide the bubbles in the fluid flowing out of the second generator.

2. The bubble generator of the dishwasher according to claim 1, wherein, The channel extends along the arrangement direction of the first generator and the second generator, and there are a plurality of channels, and the plurality of channels are arranged side by side at intervals.

3. The bubble generator of the dishwasher according to claim 2, characterized in that, The plurality of channels include a first channel and a plurality of second channels. In the direction perpendicular to the flow direction, the first channel is located at the center of the first generator, and the plurality of second channels are arranged at intervals around the first channel.

4. The bubble generator of the dishwasher according to claim 3, characterized in that, The cross-sectional area of the outlet end of the first section in the first channel is larger than the cross-sectional area of the outlet end of the first section in the second channel.

5. The bubble generator of the dishwasher according to claim 1, characterized in that The channel includes a third section that connects the first section and the second section, and the cross-sectional area of the third section perpendicular to the flow direction is equal to the cross-sectional area of the outlet end of the first section.

6. The bubble generator of the dishwasher according to claim 1, characterized in that, The inlet end of the second section has an annular end face that is perpendicular to the flow direction and extends around the inlet of the second section.

7. The bubble generator of the dishwasher according to claim 1, characterized in that, The blades extend parallel to the penetration direction of the channel, or the extension direction of the blades intersects with the penetration direction of the channel and is not perpendicular.

8. The bubble generator of the dishwasher according to claim 1, characterized in that, The second generator includes a blocking portion, and the plurality of blades are arranged at intervals around the blocking portion.

9. The bubble generator of the dishwasher according to claim 8, characterized in that, Including a plurality of connecting columns, the connecting columns are provided between the blocking portion and the first generator, and the space between the channel, the plurality of connecting columns, and the space between adjacent blades communicate with each other in sequence.

10. The bubble generator of the dishwasher according to claim 1, characterized in that, Including a limiting member and a sleeve, the first generator, the second generator, the third generator, and the limiting member are sequentially arranged in the sleeve, and the first generator is fixedly connected to the sleeve; or At least the second generator, the third generator, and the limiting member are sequentially arranged in the sleeve, and the limiting member is fixedly connected to the sleeve.

11. A dishwasher, characterized in that, Including an inner tank and a bubble generator of a dishwasher according to any one of claims 1-10, the inner tank has a washing cavity, and the bubble water produced by the bubble generator is used to be introduced into the washing cavity.

12. The dishwasher according to claim 11, characterized in that, The inner container is provided with a water cup, the water cup has a cup outlet communicating with the washing cavity, a spraying assembly is arranged in the washing cavity, the dishwasher includes a gas-liquid premixing chamber, the gas-liquid premixing chamber is provided with a liquid inlet, a gas inlet and an outlet, the gas inlet is used for introducing gas, wherein, the cup outlet is communicated with the liquid inlet through a first flow path so that the liquid in the washing cavity flows into the gas-liquid premixing chamber, the gas-liquid premixing chamber is used for mixing gas and liquid to obtain a gas-liquid mixed fluid, the bubble generator is arranged at the outlet and is used for making the gas-liquid mixed fluid into bubble water, the outlet is communicated with the washing cavity to introduce the bubble water prepared by the bubble generator into the washing cavity; the cup outlet is communicated with the spraying assembly through a second flow path so that the liquid in the washing cavity flows to the spraying assembly.

13. The dishwasher according to claim 12, characterized in that, The outlet is provided with an internal thread, the bubble generator is provided with an external thread, the bubble generator is inserted into the outlet, and the internal thread is threadedly connected with the external thread; and / or, the bubble generator is inserted into the outlet, and a convex platform protruding inwards is arranged in the outlet, and the convex platform stops downstream of the bubble generator.

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