CN112439333A

CN112439333A - Micro-nano bubble generating device and cleaning machine applying same

Info

Publication number: CN112439333A
Application number: CN201910813145.6A
Authority: CN
Inventors: 郑峰
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2021-03-05

Abstract

The invention relates to a micro-nano bubble generating device which comprises a shell with a first cavity, wherein a first water inlet for water flow to enter the first cavity is formed in the side wall of the shell, a hole which is communicated with the first cavity and the outside air is formed in the bottom wall of the shell in an up-and-down penetrating mode, and the hole is formed into a conical hole with a small upper end and a large lower end. When the pressure in the first cavity reaches a critical value which can be borne by an upper port of the tapered hole, the water flow with a large amount of air dissolved therein is rapidly released outwards from the tapered hole to form micro-nano bubble water; the process of generating the micro-nano bubble water does not need to provide power and carry out electric control operation, thereby not only simplifying the structure of the equipment, but also reducing the cost and improving the use reliability.

Description

Micro-nano bubble generating device and cleaning machine applying same

Technical Field

The invention relates to a micro-nano bubble generating device for washing electrical appliances, and also relates to a cleaning machine which is applied with the micro-nano bubble generating device and is used for cleaning tableware, vegetables or fruits.

Background

With the gradual maturity of micro-nano bubble cleaning technology, the application in the field of household appliances becomes wider.

In the field of industrial application, the nano-sized bubbles refer to fine bubbles of 1000nm or less in a liquid, bubbles of 1 to 100 μm are referred to as fine bubbles, and bubbles of 100 μm or more are referred to as normal bubbles. Compared with common bubbles, the micro-nano bubbles have the characteristics of long existence time, high surface energy, negative surface charge, high gas-liquid mass transfer rate and spontaneous generation of free radicals in water, so that the micro-nano bubbles have the functions of oxygenation, sterilization, disinfection, washing, decontamination, water purification, organic matter degradation and the like. Due to the functions of the micro-nano bubbles, the micro-nano bubbles have a wide market prospect in the fields of washing and health, such as washing, decontamination and descaling, skin cleaning, drinking water oxygenation, vegetable and fruit cleaning, tooth descaling and the like.

At present, there are four main methods for generating micro-nano bubbles: ultrasonic cavitation, hydrodynamic cavitation, optical cavitation and particle cavitation, wherein hydrodynamic cavitation equipment is simple in requirement and is a common method for generating micro-nano bubbles. For example, similar structures are disclosed in the Chinese patent application with application publication No. CN104803467A, namely, a micro-nano ozone bubble device (application No. CN201510199198.5), the Chinese patent application with application publication No. CN108842384A, namely, a micro-nano aeration-based washing machine filtering device (application No. CN201810907234.2), and the like. Above-mentioned current micro-nano bubble generating device adopts the air pump to provide the power supply most and sneaks into the air, and the air carries out intensive mixing with water and dissolves the back, and release pressure is in order to obtain the higher micro-nano bubble of concentration again, and the realization structure of this mode is relatively more complicated, with high costs, and need rely on the circuit to control, and the reliability is relatively poor.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a micro-nano bubble generating device which can generate micro-nano bubbles in a passive mode, thereby simplifying the structure of equipment, reducing the cost and improving the reliability.

Another technical problem to be solved by the present invention is to provide a cleaning machine with the micro-nano bubble generating device, aiming at the current situation of the prior art, wherein the cleaning machine can effectively improve the cleaning effect and has the functions of water overflow and ventilation.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a micro-nano bubble produces device, includes the casing, and this casing has hollow first cavity, its characterized in that: the side wall of the shell is provided with a first water inlet through which water flows into the first cavity, the bottom wall of the shell is provided with a hole which is communicated with the first cavity and the outside air in a vertically through mode, and the hole is formed into a conical hole with a small upper end and a large lower end.

In the above scheme, the upper port of the hole is located on the inner bottom wall of the shell, and the diameter of the upper port is 1-1.5 mm. Set up the up end of hole to 1 ~ 1.5mm, be in order to after rivers tentatively get into first cavity, can plug up the up end in hole to form the high pressure along with rivers entering in making first cavity, avoid getting into rivers in first cavity and flow away in rivers transportation process.

Preferably, the length of the hole in the axial direction is 15-40mm, and the diameter of the lower port of the hole is 3-8mm, and the structure is adopted to improve the forming effect of the micro-nano bubbles.

Preferably, the holes are arranged on the bottom wall of the shell at intervals, and the first water inlet is also arranged on the bottom wall of the shell. The hole is formed in the bottom wall of the shell to plug the small hole after water flow enters, so that the first cavity forms a closed cavity; set up first water inlet in the casing bottom, not only be favorable to rivers to block up the hole fast after getting into first cavity, can also form the turbulent action in first cavity at rivers input process, be favorable to making the air dissolve in aqueous fast.

In each of the above schemes, the casing is provided with a first air inlet, and the first air inlet is provided with a one-way valve which can allow air to enter the first cavity from the outside when the pressure difference inside and outside the first cavity reaches a set value. The one-way valve is arranged so that after the micro-nano bubble water is produced for one time, the first cavity recovers the original pressure, and an air source is prepared for the next micro-nano bubble water production.

Preferably, the first air inlet is arranged on the top wall of the shell, the one-way valve is restrained on the shell, and the cover is arranged outside the first air inlet. The first air inlet and the one-way valve are arranged on the top wall of the shell to avoid interference with the water inlet area.

Preferably, the check valve includes a gland and a sealing gasket, the gland is constrained at the first air inlet of the housing, the bottom of the gland is provided with a containing cavity communicated with the first air inlet, the sealing gasket is arranged in the containing cavity in a vertically movable manner, the top wall of the gland is provided with a second air inlet communicated with the containing cavity for external air, the sealing gasket moves upwards to seal the second air inlet, and the sealing gasket moves downwards to open the second air inlet.

Preferably, the sealing gasket is provided with a sealing part and a guide part, the inner diameter of the sealing part is gradually reduced from top to bottom, the upper end face of the sealing part is a sealing plane which can be pressed at the lower end of the second air inlet to seal the second air inlet, the lower end face of the guide part can be a supporting plane which is abutted against the outer edge of the first air inlet, and the supporting plane is provided with a guide groove which extends along the radial direction and allows air in the accommodating cavity to pass through the first air inlet and enter the first cavity.

Preferably, the upper edge of the sealing part to the upper edge of the guide part are shrunk in the radial direction to form a circular table. This structure is favorable to improving the sealed effect of sealed plane to the second air inlet.

Preferably, the middle part of the lower end surface of the guide part is provided with a plug-in post which extends downwards and can be inserted into the first air inlet, and a gap is formed between the outer wall of the plug-in post and the inner wall of the first air inlet when the plug-in post is inserted into the first air inlet. The insertion column is in a round table-shaped structure with a large upper end and a small lower end. The structure is beneficial to avoiding the sealing gasket from deviating in the accommodating cavity or influencing the normal floating up and down.

In order to facilitate adjustment of the set pressure of the check valve, a structure may be adopted in which: the accommodating cavity is internally provided with an air guide channel which extends downwards along the edge of the second air inlet, the periphery of the air guide channel is sleeved with an elastic piece, the upper end of the elastic piece is propped against the inner top wall of the accommodating cavity, and the lower end of the elastic piece is propped against the upper end face of the sealing gasket.

In order to facilitate installation and improve the sealing performance, the top of the shell is locally recessed at the outer edge surrounding the first air inlet to form a containing groove for installing the gland, and a sealing ring arranged around the outer edge of the first air inlet is arranged between the lower end face of the gland and the bottom wall of the containing groove.

The utility model provides an use cleaning machine that has above-mentioned micro-nano bubble to produce device, is including the box that has the washing chamber, the second water inlet has been seted up on the lateral wall of box, its characterized in that: the micro-nano bubble generating device is characterized in that a shell of the micro-nano bubble generating device is arranged on the side wall of the box body, and the lower port of the hole is communicated with a second water inlet of the box body.

In order to facilitate assembly, the shell is provided with a second cavity capable of surrounding the lower port of the hole, and a third water inlet capable of communicating the second cavity with the second water inlet of the box body is formed in the side wall of the shell.

Preferably, the inner bottom wall of the second cavity is at least close to the first side, a first inclined part is formed by gradually inclining upwards from the middle outwards, and an overflow opening is formed at the outer end of the first inclined part. The micro-nano generation device is combined with the overflow structure, so that the integral structure of the cleaning machine is simplified, the cost is saved, and the cleaning machine is convenient to control and use.

Preferably, the outer end of the first inclined part is provided with a horizontal part extending horizontally outwards, the overflow port is arranged on the horizontal part, and a baffle arranged vertically is arranged at the joint of the outer end of the first inclined part and the horizontal part.

Preferably, the inner top wall of the second cavity is lifted upwards at the end corresponding to the first inclined part to form an emptying area capable of emptying residual air in the second cavity in an overflowing state, the outer end of the emptying area vertically corresponds to the overflow port, and the inner end of the emptying area is at least arranged corresponding to the inner edge of the outer end of the first inclined part. The structure is convenient for removing residual air in the flow channel, thereby improving the front-back pressure difference of the overflow end and improving the overflow flow.

Preferably, the inner bottom wall of the second cavity is gradually inclined upwards from the middle part to the outside at a position close to the second side to form a second inclined part, the second side of the second cavity is provided with a ventilation channel extending upwards from the outer end of the second inclined part, and the upper part of the shell is provided with a ventilation opening communicated with the ventilation channel. The water tank type cleaning machine has the advantages that the water tank type cleaning machine needs heating in the cleaning process, the pressure difference between the front and the back is large, and the ventilation port is arranged to balance the internal and external air pressures.

Preferably, the first water inlet is connected with a water inlet channel, and the water inlet channel penetrates through the second cavity from bottom to top and is vertically arranged. The structure vertically conveys water flow, and is favorable for enhancing the turbulence effect generated in the first cavity.

Preferably, the water inlet channel is provided with a vortex assembly and a water flow sensor which can detect the water inlet amount.

Compared with the prior art, the invention has the advantages that: the invention provides a passive device for generating micro-nano bubbles, when in use, water flow enters a first cavity through a first water inlet, and because the upper port of a hole on the bottom wall of a shell is extremely small, the hole can be rapidly blocked by water entering the first cavity due to the action of gravity, and in the process of continuously inputting the water flow into the first cavity, air in the first cavity is continuously dissipated, so that the pressure in the first cavity is rapidly increased, the solubility of the air in water is further improved, the air is rapidly dissolved in the water along with the turbulent flow effect generated by water flow input, and when the pressure in the first cavity reaches a critical value capable of being born by the upper port of a conical hole, the water flow with a large amount of dissolved air is rapidly released outwards from the conical hole and generates negative pressure in the process of passing through the conical hole, so that micro-nano bubble water is formed; the process of generating the micro-nano bubble water does not need to provide power and carry out electric control operation, so that the equipment structure is simplified, the cost is reduced, and the use reliability is improved; the cavitation effect of the micro-nano bubbles in water and the negative charges on the surface have the chemical effect of improving the interfacial activity, and the cleaning effect is favorably improved.

Drawings

Fig. 1 is a schematic structural diagram of a micro-nano bubble generating device in embodiment 1 of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is an enlarged schematic view of portion A of FIG. 2;

FIG. 4 is an enlarged schematic view of portion B of FIG. 2;

FIG. 5 is a schematic view of the gasket of FIG. 4;

FIG. 6 is a schematic view showing an assembling structure of a check valve and a housing in embodiment 2 of the present invention;

fig. 7 is a schematic structural view of a cleaning machine in embodiment 1 of the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

Example 1:

as shown in fig. 1 to 5, the micro-nano bubble generating device of the present embodiment includes a housing 1, and the housing 1 has a hollow first cavity 11. A first water inlet 111 for water to enter the first cavity 11 is formed in the side wall of the casing 1, a hole 12 which is communicated with the first cavity 11 and the outside air is formed in the bottom wall of the casing 1, and the hole 12 is a conical hole with a small upper end and a large lower end. The last port in hole 12 is located the interior diapire of casing 1, and this last port diameter is 1 ~ 1.5mm, sets up the last port in hole to 1 ~ 1.5mm, is in order to get into first cavity 11 at rivers after tentatively, can plug up the last port in hole 12 to form the high pressure along with rivers entering in making first cavity 11, avoid the rivers that get into in first cavity 11 to flow away in rivers transportation process. The length of the hole 12 in the axial direction is 15-40mm, and the diameter of the lower port of the hole 12 is 3-8 mm. By adopting the structure, negative pressure is rapidly generated in the process of punching the holes 12 by water flow, so that the forming effect of micro-nano bubbles is improved.

In the present embodiment, the holes 12 are plural and arranged at intervals on the bottom wall of the housing 1, and the first water inlet 111 is also opened on the bottom wall of the housing 1. The hole 12 is formed in the bottom wall of the shell 1 to block the small hole after water flow enters, so that the first cavity 11 forms a closed cavity; set up first water inlet 111 in 1 bottom of casing, not only be favorable to rivers to block up hole 12 fast after getting into first cavity 11, can also form the turbulent action in first cavity 11 at rivers input process, be favorable to making the air dissolve in aqueous fast.

In this embodiment, the casing 1 is provided with a first air inlet 13, and the first air inlet 13 is provided with a check valve 2 capable of allowing air to enter the first cavity 11 from the outside when the pressure difference between the inside and the outside of the first cavity 11 reaches a set value. Set up this check valve 2 to in the little nanometer bubble water production back that finishes of once, make first cavity 11 resume original pressure, prepare the air source for the production of little nanometer bubble water next time. The first air inlet 13 is arranged on the top wall of the shell 1, and the one-way valve 2 is restrained on the shell 1 and covers the first air inlet 13. The first air inlet 13 and the check valve 2 are disposed on the top wall of the housing 1 to avoid interference with the water inlet area.

The check valve 2 of this embodiment includes the gland 21 and the sealing gasket 22, the gland 21 restricts in the first air inlet 13 department of casing 1 and the bottom is seted up the holding chamber 211 that is linked together with first air inlet 13, the sealing gasket 22 can be located in this holding chamber 211 with reciprocating, open the second air inlet 212 that supplies outside air and holding chamber 211 to be linked together on the roof of gland 21, the sealing gasket 22 moves upward and seals the second air inlet 13, the sealing gasket 22 moves down and opens the second air inlet 13. The sealing gasket 22 has a sealing portion 221 and a guiding portion 222, the inner diameter of which is gradually reduced from top to bottom, the upper end surface of the sealing portion 221 is a sealing plane which can be pressed against the lower end of the second gas inlet 212 to seal the second gas inlet, the lower end surface of the guiding portion 222 is a supporting plane which can abut against the outer edge of the first gas inlet 13, and the supporting plane is provided with a guiding groove 2221 which extends along the radial direction and allows the gas in the accommodating cavity 211 to enter the first cavity 11 through the first gas inlet 13. The upper edge of the sealing portion 221 to the upper edge of the guiding portion are shrunk in the radial direction to form a circular table 2211, which is beneficial to improve the sealing effect of the sealing plane on the second air inlet 212. The middle portion of the lower end surface of the guide portion 222 is provided with a plug column 223 extending downward and capable of being inserted into the first air inlet 13, and in a state where the plug column 223 is inserted into the first air inlet 13, a gap is provided between an outer wall of the plug column 223 and an inner wall of the first air inlet 13. The insertion column 223 is formed as a truncated cone-shaped structure with a large upper end and a small lower end, which is beneficial to preventing the sealing gasket 22 from deviating in the accommodating cavity 211 or influencing the normal floating up and down.

In order to facilitate installation and improve sealing performance, the top of the housing 1 is partially recessed at the outer edge around the first air inlet 13 to form an accommodating groove 14 for installing a gland 21, the gland 21 is fixed in the accommodating groove 14 by screws, and a sealing ring 23 arranged around the outer edge of the first air inlet 13 is arranged between the lower end surface of the gland 21 and the bottom wall of the accommodating groove 14.

As shown in fig. 7, the cleaning machine of this embodiment includes box 3 and goes up micro-nano bubble generating device, and the inside cavity of box 3 forms the washing chamber, has seted up second water inlet 31 on the lateral wall of box 3, and micro-nano bubble generating device's casing 1 is located on the 3 lateral walls of box, and the lower port in hole 12 is linked together with the second water inlet 31 of box 3. For the convenience of assembly, the housing 1 has a second cavity 15 capable of surrounding the lower port of the hole 12 therein, and a third water inlet 17 capable of communicating the second cavity 15 with the second water inlet 31 of the box body 3 is opened on the side wall of the housing 1.

The second chamber 15 of the present embodiment has a first inclined portion 151 formed at a bottom wall thereof near the first side and gradually inclined upward from the center, and an overflow opening 16 is opened at an outer end of the first inclined portion 151. The outer end of the first inclined part 151 is provided with a horizontal part 152 extending horizontally outwards, the overflow opening 16 is arranged on the horizontal part 152, a baffle 153 arranged vertically is arranged at the joint of the outer end of the first inclined part 151 and the horizontal part 152, and the upper edge of the baffle 153 is not higher than the inner bottom wall edge of the first cavity 11. The inner top wall of the second chamber 15 is raised upward at the end corresponding to the first inclined portion 151 to form an evacuation area 150 capable of evacuating the residual air in the second chamber 15 in an overflow state, and the outer end of the evacuation area 150 is up-down corresponding to the overflow opening 16, and the inner end of the evacuation area 150 is disposed corresponding to the middle of the first inclined portion 151. The structure is convenient for removing residual air in the flow channel, thereby improving the front-back pressure difference of the overflow end and improving the overflow flow. The inner bottom wall of the second chamber 15 is gradually inclined upwards from the middle to the outside near the second side to form a second inclined part 154, the second side of the second chamber 15 is provided with an air passage 155 extending upwards from the outer end of the second inclined part 154, and the upper part of the housing 1 is provided with an air vent 18 communicated with the air passage 155. Because the water tank type cleaning machine needs heating in the cleaning process, the front-back pressure difference is large, and the air vent 18 is arranged to balance the internal air pressure and the external air pressure. The embodiment combines the micro-nano generating device with the overflow structure and the ventilation structure, and is favorable for simplifying the whole structure of the cleaning machine, saving the cost and facilitating the control and use.

The first water inlet 111 is connected with a water inlet channel 19, the water inlet channel 19 penetrates through the second cavity 15 from bottom to top and is vertically arranged, and the structure vertically conveys water flow and is beneficial to enhancing the turbulence effect generated in the first cavity 11. The water inlet channel 19 is provided with a vortex component and a water flow sensor which can detect the water inlet amount.

When the micro-nano bubble generating device of the embodiment is used, water flow enters the first cavity 11 through the first water inlet 111, and the upper port of the hole 12 in the bottom wall of the shell 1 is extremely small, so that water entering the first cavity 11 can rapidly block the hole 12 due to the action of gravity, and in the process of continuously inputting the water flow into the first cavity 11, air in the first cavity 11 is continuously dissipated, so that the pressure in the first cavity 11 is rapidly increased, the solubility of the air in water is further improved, the air is rapidly dissolved in the water along with the turbulent flow effect generated by water flow input, and when the pressure in the first cavity 11 reaches a critical value capable of being borne by the upper port of the tapered hole 12, the water flow with a large amount of dissolved air is rapidly released outwards from the tapered hole 12 and generates negative pressure in the process of passing through the tapered hole 12, so that micro-nano bubble water is formed; because the air in the first cavity 11 is dissolved in water and discharged together with the water, the first cavity 11 generates a pressure difference with the outside along with the decrease of the liquid level in the first cavity 11, when the critical value set by the one-way valve 2 is reached, the sealing gasket 22 moves downwards until the lower end surface of the guide part 222 on the sealing gasket 22 abuts against the first air inlet 13, the second air inlet 212 is opened, and at the moment, the air enters the first cavity 11 through the second air inlet 212, the accommodating cavity 211, the guide groove 2221 and the first air inlet 13 to supplement an air source for the first cavity 11; when water is introduced into the first chamber 11 again, the gasket 22 floats up to close the second inlet port 212 as the pressure in the first chamber 11 increases.

The process of generating the micro-nano bubble water does not need to provide power and carry out electric control operation, so that the equipment structure is simplified, the cost is reduced, and the use reliability is improved; the cavitation effect of the micro-nano bubbles in water and the negative charges on the surface have the chemical effect of improving the interfacial activity, and the cleaning effect is favorably improved.

Example 2:

this example differs from example 1 only in that: as shown in fig. 6, the check valve 2 is different in structure. In order to adjust the set pressure of the check valve 2, the receiving cavity 211 of this embodiment has an air guide channel 213 extending downward along the edge of the second air inlet 212, an elastic member 24 is sleeved on the outer periphery of the air guide channel 213, the elastic member 24 is a spring, the upper end of the elastic member 24 abuts against the inner top wall of the receiving cavity 211, and the lower end of the elastic member 24 abuts against the upper end surface of the sealing pad 22.

Claims

1. The utility model provides a micro-nano bubble produces device, includes casing (1), and this casing (1) has hollow first cavity (11), its characterized in that: the water inlet structure is characterized in that a first water inlet (111) for water flow to enter the first cavity (11) is formed in the side wall of the shell (1), a hole (12) which is communicated with the first cavity (11) and the outside air is formed in the bottom wall of the shell (1) in a vertically through mode, and the hole (12) is a conical hole with a small upper end and a large lower end.

2. The micro-nano bubble generation device according to claim 1, wherein: the upper port of the hole (12) is located on the inner bottom wall of the shell (1), and the diameter of the upper port is 1-1.5 mm.

3. The micro-nano bubble generating device according to claim 2, wherein: the length of the hole (12) in the axial direction is 15-40mm, and the diameter of a lower port of the hole is 3-8 mm.

4. The micro-nano bubble generation device according to claim 1, wherein: the holes (12) are arranged on the bottom wall of the shell (1) at intervals, and the first water inlet (111) is also arranged on the bottom wall of the shell (1).

5. The micro-nano bubble generating device according to any one of claims 1 to 4, wherein: a first air inlet (13) is formed in the shell (1), and a one-way valve (2) capable of allowing air to enter the first cavity (11) from the outside when the pressure difference between the inside and the outside of the first cavity (11) reaches a set value is arranged on the first air inlet (13).

6. The micro-nano bubble generating device according to claim 5, wherein: the first air inlet (13) is arranged on the top wall of the shell (1), and the one-way valve (2) is restricted on the shell (1) and covers the first air inlet (13).

7. The micro-nano bubble generating device according to claim 5, wherein: check valve (2) including gland (21) and sealed pad (22), gland (21) retrain in first air inlet (13) department and the bottom of casing (1) set up holding chamber (211) that is linked together with first air inlet (13), sealed pad (22) can be located this holding chamber (211) with reciprocating, open second air inlet (212) that supply outside air and holding chamber (211) to be linked together on the roof of gland (21), sealed pad (22) rebound seals second air inlet (212), sealed pad (22) rebound opens second air inlet (212).

8. The micro-nano bubble generating device according to claim 7, wherein: the sealing gasket (22) is provided with a sealing part (221) and a guide part (222), the inner diameter of the sealing part is gradually reduced from top to bottom, the upper end face of the sealing part (221) is a sealing plane which can be tightly pressed at the lower end of the second air inlet (212) so as to seal the second air inlet, the lower end face of the guide part (222) can be a supporting plane which is abutted against the outer edge of the first air inlet (13), and the supporting plane is provided with a guide groove (2221) which extends along the radial direction so that air in the accommodating cavity (211) can pass through the first air inlet (13) and enter the first cavity body (11).

9. The micro-nano bubble generating device according to claim 8, wherein: the upper edge of the sealing part (221) to the upper edge of the guide part (222) is contracted along the radial direction to form a circular table surface (2211).

10. The micro-nano bubble generating device according to claim 8, wherein: the middle part of the lower end face of the guide part (222) is provided with a plug column (223) which extends downwards and can be inserted into the first air inlet (13), and a gap is reserved between the outer wall of the plug column (223) and the inner wall of the first air inlet (13) when the plug column (223) is inserted into the first air inlet (13).

11. The micro-nano bubble generating device according to claim 10, wherein: the insertion column (223) is in a round table-shaped structure with a large upper end and a small lower end.

12. The micro-nano bubble generating device according to claim 7, wherein: the accommodating cavity (211) is internally provided with an air guide channel (213) extending downwards along the edge of the second air inlet (212), the periphery of the air guide channel (213) is sleeved with an elastic piece (24), the upper end of the elastic piece (24) is propped against the inner top wall of the accommodating cavity (211), and the lower end of the elastic piece (24) is propped against the upper end face of the sealing gasket (22).

13. The micro-nano bubble generating device according to claim 7, wherein: the top of the shell (1) is partially recessed around the outer edge of the first air inlet (13) to form an accommodating groove (14) for installing a gland (21), and a sealing ring (23) arranged around the outer edge of the first air inlet (13) is arranged between the lower end face of the gland (21) and the bottom wall of the accommodating groove (14).

14. A cleaning machine with the micro-nano bubble generating device of any one of claims 1 to 13, comprising a box body (3) with a washing cavity, wherein a second water inlet (31) is formed in the side wall of the box body (3), and the cleaning machine is characterized in that: the micro-nano bubble generating device is characterized in that a shell (1) of the micro-nano bubble generating device is arranged on the side wall of the box body (3), and the lower port of the hole (12) is communicated with a second water inlet (31) of the box body (3).

15. The cleaning machine of claim 14, wherein: the shell (1) is provided with a second cavity (15) which can surround the lower port of the hole (12), and a third water inlet (17) which can communicate the second cavity (15) with a second water inlet (31) of the box body (3) is formed in the side wall of the shell (1).

16. The cleaning machine of claim 15, wherein: the inner bottom wall of the second cavity (15) is at least close to the first side and is gradually inclined upwards from the middle outwards to form a first inclined part (151), and an overflow opening (16) is formed at the outer end of the first inclined part (151).

17. The cleaning machine of claim 16, wherein: the outer end of the first inclined part (151) is provided with a horizontal part (152) extending outwards horizontally, the overflow opening (16) is arranged on the horizontal part (152), and a baffle (153) arranged vertically is arranged at the joint of the outer end of the first inclined part (151) and the horizontal part (152).

18. The cleaning machine of claim 16, wherein: the inner top wall of the second cavity (15) is lifted upwards at the tail end corresponding to the first inclined part (151) to form an emptying area (150) capable of emptying residual air in the second cavity (15) in an overflowing state, the outer end of the emptying area (150) is vertically corresponding to the overflow port (16), and the inner end of the emptying area (150) is at least arranged corresponding to the inner edge of the outer end of the first inclined part (151).

19. The cleaning machine of claim 15, wherein: the inner bottom wall of the second cavity (15) is gradually inclined upwards from the middle to the outside at the position close to the second side to form a second inclined part (154), the second side of the second cavity (15) is provided with an air ventilation channel (155) extending upwards from the outer end of the second inclined part (154), and the upper part of the shell (1) is provided with an air ventilation opening (18) communicated with the air ventilation channel (155).

20. The cleaning machine of any one of claims 14-19, wherein: the first water inlet (111) is connected with a water inlet channel (19), and the water inlet channel (19) penetrates through the second cavity (15) from bottom to top and is vertically arranged.

21. The cleaning machine of claim 20, wherein: and a vortex component and a water flow sensor which can detect the water inflow are arranged in the water inlet channel (19).