Bubble generating device, flow channel assembly and washing device

Abstract

The invention provides a bubble generating device, a flow channel assembly and a washing device, the bubble generating device is used for being arranged in a fluid channel, the bubble generating device comprises a body, the interior of the body is provided with a hollow cavity extending along a first direction, and the cavity is provided with a first end and a second end which are opposite in the first direction, the cross sectional area of the second end is smaller than that of the first end, and the first end is close to the water inlet end of the fluid channel relative to the second end; the blocking rib is arranged in the cavity and extends to the second end, and the blocking rib is connected with the inner wall face of the body so that the second end of the cavity can be divided into a plurality of water outlets.

Description

[0001] Case Analysis This application is a divisional application of Chinese Patent No. 202111095223.7, filed on September 17, 2021, entitled "A bubble generating device, flow channel assembly and washing device". Technical Field

[0002] This invention belongs to the field of household appliance technology, and more specifically, relates to a bubble generating device, a flow channel assembly, and a washing device. Background Technology

[0003] Bubble generators are used to extract air dissolved in liquids to produce bubbles. The diameter of the generated bubbles can range from millimeters to micrometers or even nanometers. Bubbles with a diameter of less than 50 micrometers can be called microbubbles, but the related bubble generation structures are complex. Summary of the Invention

[0004] In view of this, the present invention provides a bubble generating device, a flow channel assembly, and a washing device to solve the technical problem of how to simplify the structure of the bubble generating device.

[0005] The technical solution of this invention is implemented as follows: This invention provides a bubble generating device for use within a fluid channel, comprising: a body having a hollow cavity extending along a first direction, the cavity having a first end and a second end opposite each other in the first direction, the cross-sectional area of ​​the second end being smaller than that of the first end, wherein the first end is disposed opposite the second end near the water inlet end of the fluid channel; and a blocking rib disposed within the cavity and extending to the second end, the blocking rib being connected to the inner wall surface of the body to divide the second end of the cavity into multiple water outlets.

[0006] In some embodiments, the blocking rib includes: an annular portion, which is radially spaced from the body; and a plurality of connecting portions, which are disposed on the outer edge of the annular portion and extend outward to connect with the inner wall surface of the body to form a plurality of water outlets.

[0007] In some embodiments, the annular portion and the cavity have the same axis of symmetry, and the annular portion has a through hole extending along the axis of symmetry.

[0008] In some embodiments, multiple connecting portions are symmetrically arranged relative to the axis of symmetry, and the ratio of the radial length of the outlet to the diameter of the through hole is 0.7-1.3.

[0009] In some embodiments, the annular portion and the plurality of connecting portions extend by the same distance in the first direction.

[0010] In some embodiments, the ratio of the distance the blocking rib extends in the first direction to the distance the body extends in the first direction is less than 1 / 10.

[0011] In some embodiments, the area of ​​the cross-section of the blocking rib is a constant.

[0012] In some embodiments, the cross-sectional area of ​​the cavity gradually decreases from the first end to the second end; or, there is a turning point between the first end and the second end, the cross-sectional area of ​​the cavity gradually decreases from the first end to the turning point, and the cross-sectional area of ​​the cavity is a constant from the turning point to the second end.

[0013] This invention also provides a flow channel assembly, comprising: a water inlet having a hollow water inlet channel; and a water outlet having a hollow water outlet channel, wherein the water outlet is connected to the water inlet to connect the water inlet channel and the water outlet channel to form a fluid channel; according to the above-described bubble generating device, the bubble generating device is disposed within the fluid channel, wherein the body abuts against the water inlet and / or the water outlet.

[0014] In some embodiments, the water inlet and / or the water outlet have an air inlet that communicates with the fluid channel.

[0015] This invention also provides a washing device, comprising: a water inlet valve for opening and closing the fluid channel; a water spray body; and a flow channel assembly as described above, wherein the flow channel assembly is disposed between the water inlet valve and the water spray body and the water inlet element is disposed close to the water inlet valve.

[0016] An embodiment of the present invention provides a bubble generating device, comprising a body and a baffle rib. The body has a cavity extending along a first direction, with a first end and a second end opposite to each other. The cross-sectional area of ​​the second end is smaller than that of the first end. The baffle rib is disposed at the second end to divide the second end into multiple outlets. By setting the cross-sectional area of ​​the second end to be smaller than that of the first end, according to Bernoulli's principle, when the cross-sectional area of ​​the fluid channel decreases, the flow velocity of the liquid at the second end is greater than that at the first end, and the pressure at the second end is less than that at the first end. Therefore, during the flow of liquid from the first end to the second end, the decrease in pressure causes bubbles to precipitate within the liquid. The structure of the baffle rib at the second end of the body ensures that the cross-sectional area of ​​each outlet is smaller than that of the body at the second end, thereby further increasing the number of microbubbles precipitated at the outlets. Furthermore, the bubble generating device used in this embodiment of the invention can be integrally formed from the body and the baffle rib, resulting in a simple structure. Attached Figure Description

[0017] Figure 1This is a perspective view of the bubble generating device according to an embodiment of the present invention; Figure 2 This is a side view of a bubble generating apparatus according to an embodiment of the present invention; Figure 3 for Figure 2 A cross-sectional view along the CC direction; Figure 4 for Figure 2 Cross-sectional view along the BB direction; Figure 5 This is a cross-sectional view of the body according to another embodiment of the present invention; Figure 6 This is a schematic diagram of the flow channel assembly according to an embodiment of the present invention; Figure 7 This is a front view of the flow channel assembly according to an embodiment of the present invention; Figure 8 for Figure 7 Sectional view of the middle DD section; Figure 9 This is a schematic diagram of the washing device according to an embodiment of the present invention; Figure 10 This is an exploded view of the washing device according to an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: 10. Bubble generating device; 11. Cavity; 111. Water outlet; 112. Through hole; 12. First end; 13. Second end; 14. Body; 15. Blocking rib; 156. Annular part; 157. Connecting part; a. First area; b. Second area; 22. Water inlet; 23. Water outlet; 24. Water inlet channel; 25. Water outlet channel; 3. Air inlet; 5. Sealing element; 6. Water inlet valve; 7. Water spray body. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] The specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction. For example, different combinations of specific technical features can form different embodiments and technical solutions. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this invention will not be described separately.

[0021] In the following description, the terms "first," "second," etc., are used merely to distinguish different objects and do not indicate any similarity or connection between them. It should be understood that the directional descriptions "above," "below," "outside," and "inside" refer to the orientation under normal use conditions, while "left" and "right" indicate the left-right direction as shown in the corresponding diagram; this may or may not be the left-right direction under normal use conditions. The arrows indicate the direction of liquid flow.

[0022] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. "A plurality of" means two or more.

[0023] This invention provides a bubble generating device that can be applied to washing devices such as washing machines, washer-dryer combos, dishwashers, and fruit and vegetable washing machines. It should be noted that the application scenarios of this invention do not limit the bubble generating device itself.

[0024] This invention provides a bubble generating device for placement within a fluid channel. It should be noted that "fluid" refers to a flowing substance. In this invention, the fluid can be a liquid, such as tap water or purified water; of course, the fluid can also be a mixture of gas and liquid; a small amount of solid impurities can also be mixed in the fluid, but the fluid in this invention does not include fluids that are purely gaseous. This invention, by placing the bubble generating device within a fluid channel, allows the device to act on the fluid within the channel and generate microbubbles. Microbubbles refer to tiny bubbles with a diameter of less than fifty micrometers (μm) during bubble generation. Microbubbles can also be called micro / nanobubbles, micron-bubbles, or nanobubbles depending on their diameter range. Because of their low buoyancy in liquids, microbubbles can remain in the liquid for a relatively long time. Furthermore, microbubbles contract in the liquid until they eventually break up, generating even smaller nanobubbles. During this process, the bubbles become smaller, resulting in a slower rising speed and high melting efficiency. When microbubbles break down, they generate localized high pressure and high temperature, which can break down foreign matter such as organic matter floating in liquids or attached to objects. Furthermore, the contraction process of microbubbles is accompanied by an increase in negative charge, with the peak of negative charge typically occurring when the microbubble diameter is between 1 and 30 micrometers. This makes it easy to adsorb positively charged foreign matter floating in the liquid. As a result, after the foreign matter is broken down by the microbubbles, it is adsorbed by the microbubbles and then slowly floats to the liquid surface. These characteristics give microbubbles a strong cleaning and purifying ability. However, related bubble generating devices have low bubble production rates; therefore, this invention proposes a bubble generating device that can increase the bubble production rate.

[0025] In this embodiment of the invention, the fluid channel refers to a hollow spatial region that can be used for fluid flow. The specific physical structure forming the fluid channel is not limited in this embodiment; for example, the shape and external dimensions of the physical structure forming the fluid channel can be set according to the actual application. The cross-sectional area of ​​the fluid channel mentioned in this embodiment refers to the area of ​​the hollow region in the direction perpendicular to the fluid movement direction; this cross-sectional area can also be the cross-sectional area of ​​the hollow portion formed by the physical structure.

[0026] It should be noted that the embodiments of the present invention do not limit the composition of the water flow. That is to say, the water can be pure water or a liquid containing impurities or other mixtures. In the following embodiments, the above-mentioned flowable liquids are collectively referred to as water flow.

[0027] like Figure 1-3As shown, this embodiment of the invention provides a bubble generating device for use within a fluid channel. The bubble generating device includes a body 14 and a baffle rib 15. The body 14 has a hollow interior along a first direction (…). Figure 3 The cavity 11 extends in the direction shown by the dashed line. In some embodiments, the body 14 can be configured as an axisymmetric structure, so the first direction can be related to the axis of symmetry of the body 14. Figure 3 (The dashed lines shown are parallel.) The cavity 11 has a first end 12 and a second end 13 opposite to each other in a first direction, and the cavity 11 extending within the body 14 penetrates the two opposite ends of the body 14 in the first direction. The cross-sectional area of ​​the second end 13 is smaller than the cross-sectional area of ​​the first end 12. It should be noted that the cross-section of the body 14 is perpendicular to the first direction, and the cross-sectional area of ​​the body 14 at both ends represents the area of ​​the cross-section perpendicular to the first direction. That is, the cross-section of the first end 12 and / or the second end 13 is perpendicular to the first direction. In the embodiments of the present invention, the cross-sectional area of ​​the cavity 11 at the first end 12 or the second end 13 is the area of ​​the hollow region enclosed by the body 14 in the direction perpendicular to the first direction. It can be understood that the opening diameter of the body 14 at the first end 12 is larger than the opening diameter of the second end 13. The first end 12 is positioned relative to the second end 13 near the water inlet of the fluid channel, such that the flow direction of the liquid in the cavity 11 is from the first end 12 to the second end 13. When the cross-sectional area of ​​the second end 13 is smaller than that of the first end 12, according to Bernoulli's principle, when the cross-sectional area of ​​the fluid channel becomes smaller, the flow velocity of the liquid at the second end 13 is greater than that at the first end 12, and the pressure at the second end 13 is less than that at the first end 12. Therefore, during the flow of the liquid from the first end 12 to the second end 13, the decrease in pressure causes microbubbles to precipitate in the liquid.

[0028] like Figure 1 and Figure 3 As shown, in this embodiment of the invention, the blocking rib 15 is disposed within the cavity 11 and extends to the second end 13, that is, the blocking rib 15 is located in the first direction ( Figure 3 There is a certain distance in the direction of the dashed line shown. This distance can be small, and the blocking rib 15 has one end in the first direction ( Figure 3 The left end shown is disposed within the cavity 11, and the other end of the blocking rib 15 in the first direction ( Figure 3 The right end shown extends to the second end 13 of the body 14, and the other end of the blocking rib 15 in the first direction ( Figure 3 The right end shown can be flush with the end face of the body 14 at the second end 13.

[0029] like Figure 2As shown, the blocking rib 15 is connected to the inner wall surface of the body 14. In this embodiment of the invention, the blocking rib 15 and the body 14 can be permanently fixedly connected by an integral molding process such as injection molding or welding, or they can be detachably connected by other methods such as snap-fit ​​structure. This embodiment of the invention does not limit the specific connection method between the blocking rib 15 and the body 14, as long as the blocking rib can be set at the second end.

[0030] like Figure 2 and Figure 3 As shown, the blocking ribs divide the second end 13 of the cavity 11 into multiple outlets 111. The cross-sectional area of ​​each outlet 111 is smaller than the cross-sectional area of ​​the second end.

[0031] This invention provides a bubble generating device. When the cross-sectional area of ​​the second end is smaller than that of the first end, according to Bernoulli's principle, as the cross-sectional area of ​​the fluid channel decreases, the flow velocity of the liquid at the second end is greater than that at the first end, and the pressure at the second end is less than that at the first end. Therefore, during the flow of liquid from the first end to the second end, the decrease in pressure causes microbubbles to precipitate within the liquid. Furthermore, the structure of the blocking ribs at the second end of the main body ensures that the cross-sectional area of ​​each outlet is smaller than that of the main body at the second end, thereby further increasing the number of microbubbles precipitated at the outlets. Moreover, the bubble generating device used in this invention can be integrally molded with the main body and the blocking ribs, resulting in a simple structure.

[0032] In some embodiments, such as Figure 1 As shown, the blocking rib 15 includes an annular portion 156 and multiple connecting portions 157. The annular portion 156 and the body 14 are radially spaced apart; the cross-sectional area of ​​the annular portion 156 is smaller than the cross-sectional area of ​​the body 14 at the second end 13; that is, the annular portion 156 does not completely close the opening of the body 14 at the second end 13, thereby forming a channel with a communicating cavity between the annular portion 156 and the body 14. Multiple connecting portions 157 are disposed on the outer edge of the annular portion 156. One end of the connecting portion 157 is connected to the annular portion 156, and the other end of the connecting portion 157 extends away from the annular portion 156. Multiple connecting portions 157 are arranged circumferentially around the annular portion 156, and the other end of the connecting portion 157 is connected to the inner wall surface of the body 14 to form multiple water outlets 111. In this embodiment of the invention, the annular portion 156, connecting portions 157, and body 14 can be fixedly connected by integral molding methods such as injection molding and welding.

[0033] In some embodiments, such as Figure 1 , Figure 2 and Figure 3 As shown, the annular portion 156 and the cavity 11 have the same axis of symmetry ( Figure 3(As shown by the dashed line), the annular portion 156 has a through hole 112 extending along the axis of symmetry. The through hole 112 is located at the center of the annular portion 156, and is spaced apart from the outlet 111. That is, the outlet 111 and the through hole 112 respectively discharge fluid, and the fluid between the outlet 111 and the through hole 112 is not interconnected in the discharge state. In this embodiment of the invention, by setting through holes spaced apart from the outlet on the blocking rib, and by setting the through holes on the axis of symmetry of the main body, the number of openings can be increased while reducing the cross-sectional area of ​​the second end, thereby improving the efficiency of bubble precipitation at the second end.

[0034] In some embodiments, such as Figure 1 As shown, multiple connecting parts 157 are symmetrically arranged relative to the axis of symmetry of the body 14. Of course, the blocking rib 15 itself can also be an axisymmetric structure and have the same axis of symmetry as the body 14. Figure 2 As shown, the ratio of the radial length L1 of the outlet 111 to the diameter L2 of the through hole 112 is 0.7-1.3. This embodiment of the invention sets the ratio of the radial length of the outlet to the diameter of the through hole within a certain range, making the radial opening size of the outlet close to the opening size of the through hole. This helps to ensure the smoothness of the liquid flow at the second end, thereby improving the stability of bubble precipitation at the second end.

[0035] In some embodiments, such as Figure 4 As shown, the annular portion 156 and multiple connecting portions 157 are in the first direction ( Figure 3 The distances extended by the dotted lines shown are the same. That is to say, the thickness of the annular portion 156 and the connecting portion 157 is the same in the first direction, so that the liquid discharged from the outlet and through hole has a more uniform speed.

[0036] In some embodiments, such as Figure 3 As shown, the blocking rib 15 in the first direction ( Figure 3 The ratio of the distance L3 extending in the direction shown by the dashed line to the distance L4 extending in the first direction of the main body is less than 1 / 10. In this embodiment of the invention, by making the extension distance of the blocking rib in the first direction less than the extension distance of the main body in the first direction by a set value, the blocking rib is positioned approximately near the second end of the main body. The blocking rib cuts and turbulents the liquid to be discharged from the main body, allowing microbubbles precipitated from the turbulent flow at the second end to be quickly discharged from the main body, thereby improving the efficiency of microbubble precipitation. Furthermore, the shorter extension distance of the blocking rib in the length direction of the main body facilitates the integral molding of the main body and the blocking rib, simplifying the structure.

[0037] In some embodiments, such as Figure 3 As shown, the cross-sectional area of ​​the blocking rib 15 is a constant. It should be noted that the cross-sectional area of ​​the blocking rib 15 represents the area of ​​the blocking rib 15 in the first direction (…). Figure 3The area of ​​the cross section perpendicular to the direction of the dashed line shown is given. The blocking rib 15 has a certain thickness in the first direction, for example, the thickness of the blocking rib 15 in the first direction is L3. Then the blocking rib 15 has multiple cross sections perpendicular to the first direction. In the embodiment of the present invention, the area of ​​the cross section perpendicular to the first direction in the blocking rib is set to a fixed value. This allows the blocking rib to mainly play a role in turbulence near the outlet of the second end without further adjusting the cross section of the flow channel. This allows the liquid that has already precipitated bubbles through the contraction of the flow channel to be further affected by the turbulence and cutting of the blocking rib, generating more bubbles, thereby improving the number and efficiency of bubble generation.

[0038] In some embodiments, such as Figure 5 As shown, from the first end 12 to the second end 13, the cross-sectional area of ​​the cavity 11 gradually decreases. That is, the slope of the inner surface of the body 14 from the first end 12 to the second end 13 is a constant, so that the cavity 11 in the body 14 can be roughly regarded as a conical structure. By continuously and gradually reducing the cross-sectional area of ​​the cavity, the increase in fluid velocity and the decrease in pressure value are uniform during the process of the liquid flowing from the first end to the second end, so that bubbles can be released more stably.

[0039] In other embodiments, such as Figure 3 and Figure 4 As shown, the cavity 11 has a bend between the first end 12 and the second end 13. From the first end 12 to the bend, the cross-sectional area of ​​the cavity 11 gradually decreases, and from the bend to the second end 13, the cross-sectional area of ​​the cavity 11 is a constant. (Refer to...) Figure 1 As shown, the body 14 extends in the following direction ( Figure 1 The cavity 14 (shown as a dashed line) includes a first region a and a second region b. The first region a is closer to the first end 12 than the second region b. The taper of the first region a is greater than that of the second region b. That is, the slope of the inner surface of the body 14 is greater in the first region a than in the second region b, resulting in a greater degree of contraction of the hollow portion of the body 14 in the first region a than in the second region b. In some embodiments, the first region can be roughly considered as a conical structure, and the second region can be roughly considered as a cylindrical structure. After the fluid enters the cavity 11, the fluid can rapidly accelerate in the first region a and slowly accelerate in the second region b, thereby improving the fluid discharge efficiency at the outlet end 13.

[0040] This invention also provides a flow channel assembly, such as... Figure 6-8 As shown, the flow channel assembly includes a water inlet 22, a water outlet 23, and a bubble generating device according to any of the above embodiments. The water inlet 22 has a cavity extending along the extension direction (…). Figure 8A water inlet channel 24 (shown in the left-right direction) runs through the water outlet 23, connecting to the first end 12; the water outlet 23 has a water outlet channel 25 running through the water outlet in the extending direction, connecting to the second end 13; wherein, as shown... Figure 8 As shown, the main body 14 abuts against the water inlet 22 and the water outlet 23. Abutting means that one end face of the main body can abut against and connect with one end face of the water inlet 22, and the other end face of the main body 14 can abut against and connect with one end face of the water outlet 23. The water inlet 22 and the water outlet 23 can be fixedly connected, so that the water inlet channel and the water outlet channel are connected to form a fluid channel.

[0041] In some embodiments, such as Figure 8 As shown, the water inlet 22 is in the extending direction ( Figure 8 The cross-sectional area of ​​the inlet 23 (in the left-right direction) is larger than that of the first end 12 of the body 14. This reduces the cross-sectional area when fluid enters the body 14 from the inlet 22, further increasing the fluid flow velocity and thus increasing the number of precipitated microbubbles. The cross-sectional area of ​​the outlet 23 in the extending direction can be larger than that of the second end 13. This allows the discharged liquid containing microbubbles to flow out smoothly, and prolongs the duration of the outflowing microbubbles.

[0042] In some embodiments, such as Figure 8 As shown, the flow channel assembly also includes a seal 5, which is disposed between the inlet 22 and the outlet 23, and / or between the outlet and the bubble generating device. By providing a seal, the sealing performance of the flow channel assembly can be improved, thereby increasing the efficiency of fluid conversion into liquid with microbubbles.

[0043] In some embodiments, such as Figure 8 As shown, the inlet component 22 or the outlet component 23 has an air inlet 3 that connects to the fluid channel, thereby introducing gas into the fluid channel and increasing the gas content of the fluid in the fluid channel, which is beneficial to increasing the number of microbubbles generated by the bubble generator. Specifically, the projection position of the air inlet 3 along the axial direction of the cone is closer to the second end 13 than the first end 12. Since the bubbles generated by the gas generator are concentrated at the second end 13, the amount of dissolved air in the fluid channel closer to the second end 13 is significantly reduced. Therefore, setting the axial position of the air inlet 3 closer to 13 is beneficial for efficiently replenishing the amount of dissolved air in the fluid.

[0044] This invention also provides a washing device, such as... Figure 9 and Figure 10As shown, the washing device includes the aforementioned flow channel assembly, water inlet valve 6, and water spray body 7. The flow channel assembly is disposed between the water inlet valve 6 and the water spray body 7, with the water inlet component positioned close to the water inlet valve 6. The fluid flow direction within the washing device is as follows: the fluid enters the water inlet channel of the flow channel assembly through the water inlet valve 6, then passes through the bubble generator of the flow channel assembly, and the fluid generating microbubbles then enters the water spray body 7 through the water outlet channel of the flow channel assembly, and finally is sprayed out through the water spray body 7.

[0045] This invention improves the cleaning ability of a washing device by incorporating a bubble generator within the washing device, thereby increasing the microbubble content of the liquid. The small size of the microbubble generator allows for direct installation within the washing device, reducing the amount of detergent required and thus lowering operating costs.

[0046] In some embodiments, such as Figure 10 As shown, the washing device can be equipped with multiple bubble generators 10 to increase the number of microbubbles in the liquid.

[0047] like Figure 10 As shown, the following explanation of the bubble generation process is based on the example of a bubble generator 10 installed in a washing machine. When the washing machine is filled with water, the water inlet valve 6 is opened, and the water flows into the water inlet valve 6 and then into the bubble generator 10 through the inlet end. The water flows in the bubble generator 10. As the water passage gradually narrows, the water flow speed increases, the internal pressure of the bubble generator 10 decreases, and air inside the water is released to generate bubbles, increasing the number of microbubbles in the water flow. The water flow containing more microbubbles flows out from the second end of the bubble generator 10 and then enters the washing tub through the water spray body 7.

[0048] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A bubble generating device, used for installation within a fluid channel, characterized in that, include: The body has a hollow cavity extending in a first direction. The cavity has a first end and a second end opposite to each other in the first direction. The cross-sectional area of ​​the second end is smaller than that of the first end. The first end is positioned opposite the second end near the water inlet end of the fluid channel. A blocking rib is disposed in the cavity and extends to the second end, and the blocking rib is connected to the inner wall surface of the body to divide the second end of the cavity into multiple water outlets.

2. The bubble generating device according to claim 1, characterized in that, The blocking ribs include: The annular portion is radially spaced from the main body; Multiple connecting parts are provided on the outer edge of the annular portion and extend outward to connect with the inner wall surface of the body to form multiple water outlets.

3. The bubble generating device according to claim 2, characterized in that, The annular portion and the cavity share the same axis of symmetry, and the annular portion has a through hole extending along the axis of symmetry.

4. The bubble generating device according to claim 3, characterized in that, The plurality of connecting parts are symmetrically arranged relative to the axis of symmetry, and the ratio of the radial length of the outlet to the diameter of the through hole is 0.7-1.

3.

5. The bubble generating device according to claim 2, characterized in that, The annular portion and the plurality of connecting portions extend by the same distance in the first direction.

6. The bubble generating device according to claim 5, characterized in that, The ratio of the distance the blocking rib extends in the first direction to the distance the body extends in the first direction is less than 1 / 10.

7. The bubble generating device according to claim 6, characterized in that, The cross-sectional area of ​​the blocking rib is a constant.

8. The bubble generating apparatus according to any one of claims 1-7, characterized in that, From the first end to the second end, the cross-sectional area of ​​the cavity gradually decreases continuously; Alternatively, there is a transition section between the first end and the second end, and the cross-sectional area of ​​the cavity gradually decreases continuously from the first end to the transition section, while the cross-sectional area of ​​the cavity is a constant from the transition section to the second end.

9. A flow channel assembly, characterized in that, include: The water inlet has a hollow water inlet channel inside; The water outlet has a hollow water outlet channel inside. The water outlet is connected to the water inlet to connect the water inlet channel and the water outlet channel to form a fluid channel. According to any one of claims 1-8, the bubble generating device is disposed within the fluid channel, wherein the main body abuts against the water inlet and / or the water outlet.

10. The flow channel assembly according to claim 9, characterized in that, The water inlet and / or the water outlet have air inlets that communicate with the fluid channel.

11. A washing device, characterized in that, include: The inlet valve is used to open and close the fluid passage. Water jet; The flow channel assembly as described in claim 9 or 10, wherein the flow channel assembly is disposed between the inlet valve and the spray body and the inlet element is disposed close to the inlet valve.

Images