TWI705941B - Micro bubble generator - Google Patents

Abstract

A microbubble generating device is arranged at one end of a liquid supply device, which is arranged in sequence and includes: a water inlet unit, a water outlet unit, an air inlet groove, and a first sleeve. The water inlet unit includes a plurality of first sleeves. A channel penetrates the water inlet unit and a first connection surface is provided at one end; the water outlet unit includes a plurality of second channels that penetrate the water outlet unit and a second connection surface is provided through one end, the second connection surface faces the first The connecting surface and part of the air inlet groove are mutually abutting to form the air inlet groove. The air inlet groove includes a third channel and a first chamber on the circumferential side, wherein the first chamber has a first distance. The length is different from the second distance of the third passage; and the first sleeve is arranged at the other end of the water outlet unit opposite to the second connecting surface, whereby the air inlet groove utilizes the first chamber and the The shorter setting of the third channel reduces the required negative pressure and improves the efficiency of gas-liquid mixing.

Description

Micro bubble generating device

The present invention relates to a microbubble generating device, in particular to a microbubble generating device used to soften water flow and increase the air content of the water flow and the fineness of the bubbles.

The conventional aerator is mainly composed of a pump, a water outlet pipe connected to the pump, and a gas-liquid mixing pipe connected to the water outlet pipe. The diameter of the outlet pipe is tapered from the pump toward the gas-liquid mixing pipe. The gas-liquid mixing pipe includes a pipe connecting the outlet pipe and an air inlet pipe communicating with outside air. The pipe has a larger diameter than the water outlet pipe. When the pump pumps the water out and pressurizes it to the junction between the outlet pipe and the duct, the water flow will form a negative pressure after entering the duct. The negative pressure will cause the outside air to be sucked into the gas-liquid mixing pipe from the air intake pipe and interact with it. The water stream is mixed into bubbles, and the mixed bubble water stream is guided to the laundry to achieve the purpose of washing and sterilizing through aeration and purified water. If used for washing vegetables, purified water with high air content can also decompose pesticides.

However, when the water flow of the conventional aerator structure flows through the gas-liquid mixing pipe, the bubble volume is determined by the volume of the inlet pipe and the water pressure of the pump. In addition, the water pressure of the pump must maintain the water flow to a specific flow rate so that the air can be sucked in to form a gas-liquid mixture. Therefore, the user cannot use the conventional aerator structure to change the average volume of bubbles generated in the gas-liquid mixing tube before any water pressure or arbitrarily reduce the flow rate. Therefore, when the user needs finer bubbles for water purification, Conventional aerators cannot meet their needs. In addition, the gas-liquid mixture produced by the above-mentioned bubble mixing device has too low gas content and large bubble volume, which makes it difficult to maintain the bubble shape for a long time. At the same time, it needs a large water pressure to have the opportunity to produce gas-liquid with gas content. Mixed liquid, and can not produce a gas-liquid mixture containing a large number of dense bubbles and a milky white color. Therefore, how to improve the aforementioned shortcomings of the prior art is a problem that the industry urgently wants to overcome.

The purpose of the present invention is to improve the problems that the conventional gas-liquid mixing device cannot be used in the low water pressure state or the output gas-liquid mixture has insufficient bubble volume and insufficient bubble volume density.

To achieve the above objective, the present invention provides a microbubble generating device, which is arranged at one end of a liquid supply device. The microbubble generating device includes: a water inlet unit, a water outlet unit, an air inlet groove, and a first A sleeve, the water inlet unit includes at least one first channel penetrating the water inlet unit, and one end of the water inlet unit penetrated by the first channel is provided with a first connecting surface; the water outlet unit includes at least one second channel penetrating the water inlet unit A water outlet unit, one end of the water outlet unit penetrating through the second channel is provided with a second connection surface, wherein the water inlet unit is arranged on the water outlet unit, and the first connection surface and the second connection surface are part of each other Leaning against each other to form the air inlet groove between the first connection surface of the water inlet unit and the second connection surface of the water outlet unit, and the second channel communicates with the first channel and causes the inlet The air groove connects the outside air to the first passage and the second passage, the air inlet groove further includes a third passage and a first chamber surrounding the third passage, and the first The chamber has a first distance perpendicular to the first connection surface and the second connection surface, and the third channel has a second distance perpendicular to the first connection surface and the second connection surface, wherein the The length of the first interval is different from the length of the second interval; and the first sleeve is disposed at the other end of the water outlet unit opposite to the second connecting surface, and the first sleeve is parallel to a first direction and forms a first side wall A first flange is formed at one end of the first sleeve parallel to a second direction, and the first direction is orthogonal to the second direction.

Further, the first connecting surface of the water inlet unit is protrudingly provided with an abutting portion facing the second connecting surface of the water outlet unit, the abutting portion abuts on the second connecting surface, and the third channel The tie ring is provided with the abutting portion, and the position of the first side wall of the first sleeve relative to the first chamber is provided with at least one air-permeable through hole to communicate with the first chamber, and the water inlet unit and the water outlet The unit is accommodated in the first sleeve.

Further, one end of the first channel is a first water inlet and the other end is a first water outlet, the first water outlet is located at the end of the first connecting surface, and the first channel faces from the first water inlet The direction of the first water outlet tapers.

Further, one end of the second channel is a second water inlet and the other end is a second water outlet, a water diversion part is provided between the second water inlet and the second water outlet, and the second water inlet is located at the first water inlet. The two connecting surface ends are tapered toward the water diversion portion, and the second water outlet is parallel to the first direction and gradually expands away from the water diversion portion.

Further, when viewed from the cross-sectional direction, the water diversion portion has a third interval parallel to the second direction, and the ratio of the length of the second interval to the third interval is between 1:20 and 1:100.

Further, when viewed from the cross-sectional direction, the first water outlet has a fourth distance parallel to the second direction, and the length ratio of the second distance to the fourth distance is greater than 1:1 and less than or equal to 1:3.

Further, the diameter of the fourth pitch of the first water outlet is smaller than the diameter of the second water inlet at the extension position of the second connecting surface when viewed from the cross-sectional direction.

Further, the length of the first interval is greater than the length of the second interval.

Further, the second connecting surface of the water outlet unit is provided with an abutting portion protruding toward the first connecting surface of the water inlet unit, the abutting portion abuts on the first connecting surface, and the third channel is a ring Set the abutment part.

Further, the water outlet unit is parallel to the first direction to form a second side wall, the second side wall is arranged around the circumference of the water inlet unit and the first side wall, and the second side wall is opposite to the first chamber The position is provided with at least one air-permeable through hole to communicate with the first chamber.

Further, the water inlet unit forms a third side wall parallel to the first direction, and the third side wall surrounds the water outlet unit and the peripheral side of the first side wall, and the third side wall is opposite to the first chamber The position is provided with at least one air-permeable through hole to communicate with the first chamber.

Further, the microbubble generating device further includes a second sleeve that houses the water inlet unit, the water outlet unit, the air inlet groove and the first sleeve, so that the microbubble generating device Fixed on the liquid supply device.

Further, the microbubble generating device includes a wave layer net assembly disposed between the water outlet unit and the first sleeve, wherein the wave layer net assembly includes at least one spacer and at least a wave layer net assembly At one end of the partition parallel to the second direction, the partition has a fourth channel penetrating the partition, the fourth channel communicates with the second channel, and each of the corrugated layer nets further has a plurality of sieve holes .

Further, the number of the corrugated layer nets arranged between two adjacent partitions is the farther the distance from the second connection surface is, the greater the number of the corrugated layer nets is between the partitions.

Further, the size of each sieve hole is between 0.048 mm and 0.3 mm.

Further, the farther the sieve holes of the corrugated layer nets arranged between two adjacent compartments and the second connection surface are, the further the corrugated layer nets located between the compartments The screen holes projected on the second connecting surface are smaller in size.

Further, the height of each spacer parallel to the first direction is preferably between 0.2 mm and 1 mm.

The present invention can pass through the third passage of the air inlet groove and the first chamber surrounding the third passage so that when any water flows through the water inlet unit and the water outlet unit, the outside air can be Simply pass the air-permeable through hole through the first chamber and the third passage of the air inlet groove, so that the outside air passes through the air inlet groove and generates sonic vibration to mix gas and liquid before entering the second channel , With each waved layer net assembly, the bubbles in the water stream are cut and miniaturized, so that the water stream under any water pressure can contain a large number of dense bubbles. In addition, the air inlet groove of the present invention utilizes the shorter arrangement of the first chamber and the third channel, thereby reducing the water pressure of the water flow when the microbubble generating device generates the required negative pressure, and at the same time can increase the air pressure. The efficiency of liquid mixing.

Here are a few preferred implementation aspects of the technical features and operation methods of this application, which will be described in conjunction with the illustrations for review and reference. Furthermore, the figures in the present invention are not necessarily drawn according to the actual scale for the convenience of explanation, and the proportions in the figures are not used to limit the scope of the present invention.

Furthermore, the ordinal numbers used in this specification and the claims, such as the terms "first", "second", etc., are used to modify the elements of the claim, and they do not imply and represent that the requested element has any previous ordinal numbers. , Does not represent the order of a request element and another request element, or the order of the manufacturing method. The use of these ordinal numbers is only used to make a request element with a certain name and another request element with the same name Can make a clear distinction.

In addition, the positions mentioned in this specification and the claims, such as "above", "above", "above", "below", "below" or "below" can mean that the two elements are in direct contact, or It can mean that the two elements are not in direct contact. When it defines a value ranging from a first value to a second value, the value includes the first value, the second value, or any value between the first value and the second value.

Furthermore, the features of different embodiments of the present disclosure can be combined with each other to form another embodiment.

Regarding the technology of the present invention, please refer to FIG. 1, FIG. 2 and FIG. 4. The present invention provides a microbubble generating device 100, which is arranged at one end of a liquid supply device 900, which can be a shower head , Faucet, etc. The microbubble generating device 100 makes the water contain a large number of microbubbles, increases the air content in the water, and improves the washing ability by rubbing the surface of the object to be rinsed by the bubbles. The microbubble generating device 100 can be installed in the internal pipeline of the liquid supply device 900, or installed outside the liquid supply device 900 as shown in FIG. 4, which is not limited in the present invention.

Specifically, referring to Figures 1, 3 and 5, the microbubble generating device 100 includes: a water inlet unit 10, a water outlet unit 20, an air inlet groove 30, and a first A sleeve 40, a wave layer net assembly 50, and a second sleeve 60. The water inlet unit 10 includes at least one first channel 11 passing through the water inlet unit 10, and the water inlet unit 10 is penetrated by the first channel 11 One end is provided with a first connection surface 12, and one end of the first channel 11 is a first water inlet 111 and the other end is a first water outlet 112, and the first water outlet 112 is located at the end of the first connection surface 12, And the first channel 11 is tapered from the first water inlet 111 toward the first water outlet 112, wherein the water inlet unit 10 of this embodiment has a plurality of first channels 11; the water outlet unit 20 includes at least A second channel 21 penetrates the water outlet unit 20. One end of the water outlet unit 20 through which the second channel 21 passes is provided with a second connection surface 22. The second connection surface 22 faces the first connection surface 12, and the second channel One end of 21 is a second water inlet 211 communicating with the first water outlet 112, and the other end is a second water outlet 212. A water diversion part 213 is provided between the second water inlet 211 and the second water outlet 212; The air inlet groove 30 is disposed between the first connection surface 12 of the water inlet unit 10 and the second connection surface 22 of the water outlet unit 20. The air inlet groove 30 further includes a third channel 31 and Surrounded by a first chamber 32 on the peripheral side of the third channel 31, the first chamber 32 is connected to outside air (not marked, as indicated by the circled in Figure 5), so that the outside air first After passing through the first chamber 32, it passes through the third channel 31, and mixes with the water flowing through the first channel 11 and then flows into the second channel 21. The dashed arrow shows the external air path. The first sleeve 40 is disposed at the other end of the outlet unit 20 opposite to the second connecting surface 22, the first sleeve 40 is parallel to a first direction Z to form a first side wall 41, and one end of the first sleeve 40 A first flange 42 is formed parallel to a second direction X, and the first direction Z is orthogonal to the second direction X; the corrugated layer net assembly 50 is disposed between the water outlet unit 20 and the first sleeve 40 The corrugated layer net assembly 50 includes at least one spacer 51 and at least one corrugated layer net 52. Each of the spacers 51 penetrates a fourth channel 511, and at least one of the spacers 51 is provided between two adjacent ones of the spacers 51. The corrugated layer nets 52, please refer to Figure 9, each corrugated layer net 52 has a plurality of meshes 521, and the number of corrugated layer nets 52 arranged between two adjacent partitions 51 is and The farther the second connection surface 22 is, the more the number of wave layer nets 52 it has, and because the number of wave layer nets 52 is larger, all the wave layers between the different spacers 51 The size of the screen holes 521 of the layer net 52 projected to the second connecting surface 22 will be smaller due to the large number of corrugated layer nets 52, that is, the size of the three corrugated layer nets 52 screen The size of the mesh 521 projected by the hole 521 on the second connecting surface 22 is smaller than the size of the mesh 521 projected on the second connecting surface 22 of the meshes 521 with two corrugated layer meshes 52; the second set The barrel 60 can accommodate the water inlet unit 10, the water outlet unit 20, the air inlet groove 30, the wave layer net assembly 50 and the first sleeve 40, and can fix the microbubble generating device 100 to The liquid supply device 900 is installed.

Please refer to FIG. 3, FIG. 5 and FIG. 6. In the aspect of this embodiment, the first chamber 32 has a first chamber 32 perpendicular to the first connecting surface 12 and the second connecting surface 22. A gap L1, and the third channel 31 has a second gap L2 perpendicular to the first connection surface 12 and the second connection surface 22, and the length of the first gap L1 is different from the length of the second gap L2 , Wherein, in this embodiment, the length of the first distance L1 is greater than the length of the second distance L2, and the first distance L1 means that the first connecting surface 12 and the second connecting surface 22 are in the first chamber 32 The second distance L2 refers to the distance between the first connection surface 12 and the second connection surface 22 at the third channel 31, and the first connection surface 12 and the second connection surface 22 are due to the manufacturing process There will be errors, so the spacing is not restricted to be perpendicular to each other. From the cross-sectional direction, the water diversion portion 213 has a third distance L3 parallel to the second direction X, and the ratio of the length of the second distance L2 to the third distance L3 is between 1:20 and 1:100. From the cross-sectional direction, the first water outlet 112 is parallel to the second direction X and has a fourth distance L4, and the ratio of the length of the second distance L2 to the fourth distance L4 is greater than 1:1 and less than or equal to 1:3 between.

Please refer to Figures 3, 4, 5 and 6, in the aspect of this embodiment, the first connecting surface 12 of the water inlet unit 10 faces the second connection surface of the water outlet unit 20 An abutting portion 13 is protruded in the direction 22 of the connecting surface, and the abutting portion 13 abuts against the second connecting surface 22. However, the present disclosure is not limited to this, that is, the abutting portion 13 can also be used by the water outlet unit 20. The second connecting surface 22 protrudes toward the first connecting surface 12 of the water inlet unit 10 (not shown).

In addition, please refer to FIG. 1, FIG. 3, FIG. 4, FIG. 5 and FIG. 6. In the aspect of this embodiment, the first side wall 41 of the first sleeve 40 is opposite to the first The location of the accommodation chamber 32 is provided with at least one air-permeable through hole 43 communicating with the first accommodation chamber 32, and the first flange 42 of the first sleeve 40 protrudes inwardly to abut and limit the wave layer net assembly At 50, this embodiment is provided with two ventilation through holes 43, the ventilation through holes 43 are connected to the first chamber 32 of the air inlet groove 30, and the water inlet unit 10 and the water outlet unit 20 And is accommodated in the first sleeve 40, and the second water inlet 211 is located at the end of the second connecting surface 22 and tapers toward the water diversion portion 213, and the second water outlet 212 is parallel to the first direction Z The water inlet unit 10 is arranged on the water outlet unit 20 and the second channel 21 communicates with the first channel 11 and the third channel 31. The air-permeable through hole 43 not only allows external air to enter the air inlet groove 30, the air-permeable through hole 43 also facilitates the user to clean the microbubble generating device 100 by means of needle, gas injection or liquid injection, wherein the air-permeable It is a preferable embodiment to provide two through holes 43 on the first side wall 41 as in the present embodiment, but one or more than two through holes 43 may be provided, for example, three ventilating through holes 43 on the first side wall 41.

In the aspect of this embodiment, each of the first channels 11 is tapered from the first water inlet 111 toward the first water outlet 112, and each of the second channels 21 is from the second water inlet 211 toward the water diversion The portion 213 is tapered, and the diameter of the fourth distance L4 of the first water outlet 112 is smaller than the diameter of the second water inlet 211 at the extension position of the second connecting surface 22, so that the water flow through the first channel 11 is reduced due to It can be pressurized first and then to the second passage 21, so that the air inlet groove 30 generates a Venturi effect, and the outside air passes from the vent hole 43 through the first chamber 32 of the air inlet groove 30 And the third channel 31 are introduced into the second channel 21 for gas-liquid mixing. Please refer to Figures 4, 5, and 6, as shown in Figures 4, 5 and 6, after the water flows through the first outlet 112 of the first channel 11 Then, a negative pressure will be generated between the second water inlet 211 and the third channel 31 with a larger diameter, and after the air enters the first chamber 32 through the vent hole 43, The chamber 32 passes through the third channel 31 so that the water flow can produce violent gas-liquid mixing at the second water inlet 211 of the second water channel 21. In this way, it is not only by reducing the second spacing of the air inlet groove 30, The length of L2 increases the density and number of bubbles produced, and further reduces the water pressure required for generating the Venturi effect and generating the negative pressure due to the shortening of the path length of the air passing through the third channel 31.

Please refer to Figure 9, in order to increase the number of bubbles output by the wave layer net assembly 50 of the microbubble generating device 100, each wave layer net 52 has a plurality of sieve holes 521, which are arranged in the phase The number of the corrugated layer nets 52 between the two adjacent partitions 51 is the farther the distance from the second connecting surface 22 is, the more the number of corrugated layer nets 52 it has, because it is located in the partition 51 The larger the number of the corrugated layer nets 52 between the partitions 51, the more the sieve holes 521 of all the corrugated layer nets 52 between the partitions 51 are projected onto the second connecting surface 22. The farther away the second connecting surface 22 is, the smaller the size, that is, the size of the meshes 521 with 3 corrugated layer meshes 52 projected to the second connecting surface 22 will be smaller than that with 2 corrugated The meshes 521 of the layer mesh 52 project to the size of the mesh 521 of the second connecting surface 22, and the meshes 521 of the two corrugated layer meshes 52 project to the mesh of the second connecting surface 22 The size of 521 will be smaller than the size of the mesh 521 projected on the second connecting surface 22 of the meshes 521 with a corrugated layer mesh 52; in the aspect of this embodiment, the partitions 51 are separated from each other. Different numbers of corrugated layer nets 52 are arranged according to the distance of the second connecting surface 22. For example, the farther away from the second connecting surface 22 in this embodiment, three corrugated layer nets 52 and one spacer 51 are set first. Secondly, two corrugated layer nets 52 and one spacer 51 are provided, and then one corrugated layer net 52 and one spacer 51, that is, the spacers will be used between different numbers of corrugated layer nets 52 51 are separated, and because different numbers of the corrugated layer nets 52 are stacked, the farther the corrugated layer nets 52 from the second connecting surface 22 are not only more numerous, but also projected onto the second connecting surface The size of the meshes 521 of 22 is also because when the meshes 521 are viewed in the first direction Z, the meshes 521 will overlap each other and the size of the meshes 521 will be smaller. If it is used in general household faucets, car washes, agricultural sprinklers, the size of each sieve 521 of the corrugated layer mesh 52 is preferably between 0.048 mm and 0.3 mm according to the flow of water. The height of the spacer 51 parallel to the first direction Z is preferably between 0.2 mm and 1 mm, however, the disclosure is not limited to this.

Please refer to FIG. 7, in the second implementation aspect of this embodiment, the water outlet unit 20 forms a second side wall 23 parallel to the first direction Z, and the second side wall 23 surrounds the water inlet unit 10 , The corrugated layer net assembly 50 and the peripheral side of the first side wall 41, and the second side wall 23 relative to the first chamber 32 is provided with at least one air-permeable through hole 24 communicating with the first chamber 32 , And the first flange 42 of the first sleeve 40 protrudes outward to abut and limit the second side wall 23.

Please refer to Fig. 8, in the third implementation aspect of this embodiment, the water inlet unit 10 forms a third side wall 14 parallel to the first direction Z, and the third side wall 14 surrounds the water outlet unit 20 , The corrugated layer net assembly 50 and the peripheral side of the first side wall 41, and the third side wall 14 relative to the first chamber 32 is provided with at least one vent hole 15 communicating with the first chamber 32 , And the first flange 42 of the first sleeve 40 protrudes outward to abut and limit the third side wall 14.

The content of the present invention has been described in detail above, but the above are only the preferred embodiments of the present invention, and should not be used to limit the scope of implementation of the present invention, that is, all equivalent changes and Modifications should still fall within the scope of the patent of the present invention.

100 Micro bubble generating device To To 10 Inlet unit To To 11 First channel 111 First inlet 112 The first outlet To To 12 First connection surface 13 Abutment 14 Third side wall 15 Breathable through holes 20 Outlet unit To To twenty one Second channel 211 Second inlet 212 Second outlet 213 Water diversion twenty two Second connecting surface twenty three Second side wall twenty four Breathable through holes To To 30 Intake groove To To 31 Third channel 32 The first chamber 40 First sleeve To To 41 First side wall 42 First flange 43 Breathable through holes To To 50 Wave layer net assembly To To 51 Septum 511 Fourth channel 52 Wave layer network 521 Mesh 60 Second sleeve To To L1 First spacing L2 Second spacing L3 Third spacing L4 Fourth pitch Z First direction X Second direction 900 Liquid supply device To To

Figure 1: is a three-dimensional exploded view of the first embodiment of the present invention. Figure 2: is a three-dimensional assembly diagram of the first embodiment of the present invention. Figure 3: A schematic cross-sectional view of the first embodiment of the present invention. Figure 4: is a schematic diagram of the use state of the first embodiment of the present invention. Figure 5: is a schematic cross-sectional view of the use state of the first embodiment of the present invention. Figure 6: is a partial enlarged view of the first embodiment of the present invention. Figure 7: is a cross-sectional view of the second embodiment of the present invention. Figure 8: is a cross-sectional view of the third embodiment of the present invention. Figure 9: is a three-dimensional exploded view of the corrugated layer net assembly of the present invention.

100 Micro bubble generating device To To 10 Inlet unit To To 11 First channel 111 First inlet 12 First connection surface 13 Abutment 20 Outlet unit To To twenty one Second channel twenty two Second connecting surface 40 First sleeve To To 41 First side wall 42 First flange 43 Breathable through holes To To 50 Wave layer net assembly To To 51 Septum 52 Wave layer network 60 Second sleeve To To

Claims (12)

A microbubble generating device is arranged at one end of a liquid supply device, and the microbubble generating device includes: A water inlet unit including at least one first channel penetrating the water inlet unit, and one end of the water inlet unit penetrated by the first channel is provided with a first connecting surface; A water outlet unit includes at least one second channel penetrating the water outlet unit. One end of the water outlet unit penetrated by the second channel is provided with a second connection surface. The second connection surface faces the first connection surface, wherein the water inlet The unit is arranged on the water outlet unit and the second channel is connected to the first channel; An air inlet groove is provided between the first connection surface of the water inlet unit and the second connection surface of the water outlet unit, and the air inlet groove further includes a third channel and is arranged around the third One of the first chambers around the channel; and A first sleeve is arranged at the other end of the water outlet unit opposite to the second connecting surface, the first sleeve is parallel to a first direction and forms a first side wall, and one end of the first sleeve is parallel to a second direction and forms a A first flange, the first direction is orthogonal to the second direction; Wherein, the first connection surface and the second connection surface are partially leaned against each other; Wherein, the first chamber has a first distance between the first connection surface and the second connection surface, and the third channel has a second distance between the first connection surface and the second connection surface, And the length of the first interval is different from the length of the second interval. The microbubble generating device described in item 1 of the scope of patent application, wherein the first connecting surface of the water inlet unit is protrudingly provided with an abutting portion facing the direction of the second connecting surface of the water outlet unit, and the abutting portion abuts Is placed on the second connecting surface, and the third channel is provided with the abutting portion, and the position of the first side wall of the first sleeve relative to the first chamber is provided with at least one ventilation hole and the The first chamber is connected, and the water inlet unit and the water outlet unit are accommodated in the first sleeve. According to the microbubble generating device described in claim 1, wherein one end of the first channel is a first water inlet and the other end is a first water outlet, and the first water outlet is located at the end of the first connecting surface And the first channel is tapered from the first water inlet toward the first water outlet. The microbubble generating device described in item 3 of the scope of patent application, wherein one end of the second channel is a second water inlet and the other end is a second water outlet, between the second water inlet and the second water outlet A water diversion part is provided, and the second water inlet is located at the end of the second connecting surface and gradually shrinks toward the water diversion part, and the second water outlet gradually expands away from the water diversion part. The micro-bubble generating device described in item 4 of the scope of patent application, wherein the water diversion part is parallel to the second direction and has a third distance when viewed from the cross-sectional direction, and the length ratio of the second distance to the third distance is 1:20 ~1:100. The microbubble generating device described in item 4 of the scope of patent application, wherein the first water outlet is parallel to the second direction and has a fourth distance from the cross-sectional direction, and the ratio of the length of the second distance to the fourth distance is greater than 1:1 and less than or equal to 1:3. According to the micro-bubble generating device described in item 6 of the scope of patent application, the diameter of the fourth pitch is smaller than the diameter of the second water inlet at the extension position of the second connecting surface viewed from the cross-sectional direction. According to the microbubble generating device described in claim 1, wherein the length of the first interval is greater than the length of the second interval. The microbubble generating device described in item 1 of the scope of patent application, wherein the second connecting surface of the water outlet unit is protrudingly provided with an abutting portion facing the first connecting surface of the water inlet unit, and the abutting portion abuts The abutting part is arranged around the first connecting surface and the third channel. The microbubble generating device described in claim 1, wherein the water outlet unit forms a second side wall parallel to the first direction, and the second side wall is arranged around the water inlet unit and the first side wall At least one air-permeable through hole is provided at a position of the second side wall relative to the first chamber to communicate with the first chamber. According to the microbubble generating device described in claim 1, wherein the water inlet unit forms a third side wall parallel to the first direction, and the third side wall is arranged around the water outlet unit and the first side wall At least one air-permeable through hole is provided at a position of the third side wall relative to the first chamber to communicate with the first chamber. The micro-bubble generating device described in item 1 of the scope of patent application further includes a second sleeve that houses the water inlet unit, the water outlet unit, the air inlet groove, and the first sleeve , The micro bubble generating device is fixed on the liquid supply device.

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