CN211484275U - Air inlet structure, foam generating device and hand washer - Google Patents

Abstract

The utility model provides an air inlet structure, foam generating device and machine of washing hand, including last casing, upper cover, lower cover and stock solution bottle: the interior of the upper shell is hollow; the upper cover covers the upper end of the upper shell; the lower cover covers the lower end of the upper shell; the liquid storage bottle is connected with the lower cover; the upper shell is provided with a first air inlet; the first air inlet hole is communicated with the inner space of the upper shell; set up the second inlet port on the lower cover, the second inlet port respectively with stock solution bottle and upper shell internal portion communicate, air inlet structure, foam generating device and machine of washing hand have more pleasing to the eye, difficult weeping, simple structure, the advantage of being convenient for make.

Description

Air inlet structure, foam generating device and hand washer

Technical Field

The utility model relates to a foam preparation technical field, in particular to air inlet structure, foam generating device and machine of washing hand.

Background

In daily life and production processes, it is often necessary to mix gas and liquid and prepare the mixture into foam, such as a hand washing machine.

The existing hand washing machine generally comprises a liquid storage bottle, a pump and a fluid conveying channel, wherein the fluid conveying channel comprises a liquid conveying channel, a gas conveying channel and a foam conveying channel, the liquid conveying channel comprises a liquid inlet channel and a liquid outlet channel, and the gas conveying channel comprises a gas inlet channel and a gas outlet channel. Liquid in the liquid storage bottle enters the pump through the liquid inlet channel, gas (such as air and the like) enters the pump through the gas inlet channel, and the liquid and the gas are mixed in the pump to form foam and are discharged out of the hand washer in the form of the foam.

Generally, hand washing machines often use air as the gas for preparing the foam, a pump is connected to the outside atmosphere through an intake passage to suck in the gas, and at the same time, the pump is connected to a liquid storage bottle through a liquid inlet passage to suck in the liquid. Generally, a pump is located inside the hand washing machine, a liquid inlet and an air inlet are arranged on the pump, in order to connect the pump with external atmosphere, a through hole is often required to be formed in an outer shell of the hand washing machine, the air inlet on the pump is communicated with the external atmosphere through the through hole, and the attractiveness of the hand washing machine is easily influenced due to the arrangement of the through hole in the outer shell of the hand washing machine. In addition, in order to ensure that the liquid storage bottle can continuously discharge liquid, the pressure in the liquid storage bottle needs to be kept equal to the external atmospheric pressure, and therefore an air inlet hole used for balancing air pressure is usually arranged on the liquid storage bottle, but the liquid storage bottle has the risk of liquid leakage due to the arrangement of the air inlet hole, and on the other hand, the liquid storage bottle and the hand washing machine need to be kept in an upright state in the using process, so that the using process is limited.

Therefore, it is an urgent technical problem to be solved by those skilled in the art to provide an air intake structure, a foam generating device and a hand washing machine, so as to overcome the technical problems of low aesthetic degree, easy liquid leakage and limited use of the existing hand washing machine.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing an air inlet structure, foam generating device and hand washer to overcome current hand washer aesthetic measure low, easy weeping, the restricted technical problem of use.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this: an air inlet structure comprises an upper shell, an upper cover, a lower cover and a liquid storage bottle: the interior of the upper shell is hollow; the upper cover covers the upper end of the upper shell; the lower cover covers the lower end of the upper shell; the liquid storage bottle is connected with the lower cover; the upper shell is provided with a first air inlet; the first air inlet hole is communicated with the inner space of the upper shell, and external air can enter the upper shell through the first air inlet hole; the lower cover is provided with a second air inlet hole, the second air inlet hole is respectively communicated with the liquid storage bottle and the interior of the upper shell, and outside air can enter the liquid storage bottle through the first air inlet hole and the second air inlet hole in sequence.

Further, an interlayer is arranged in the upper shell, the interlayer divides the inner space of the upper shell into two parts, the space between the upper cover and the interlayer is marked as a first space, and the space between the interlayer and the lower cover is marked as a second space.

Furthermore, the first air inlet hole is located between the lower cover and the interlayer, a pump air inlet hole is formed in the interlayer, and the first air inlet hole is communicated with the pump air inlet hole.

Furthermore, the partial area of interlayer is protruding to in the first space the downside of interlayer forms the dashpot, the pump inlet port is located the tank bottom of dashpot.

Furthermore, an air guide bulge is arranged at the bottom of the buffer tank, the air guide bulge is hollow, and the air guide bulge is communicated with the pump air inlet hole.

Further, be formed with the battery compartment on the interlayer, go up set up on the casing with the bin mouth that the battery compartment is linked together, cover the battery storehouse lid on the bin mouth, set up the joint piece on the battery storehouse lid, it corresponds, bin mouth department sets up the joint groove, joint piece and joint groove joint.

Furthermore, the clamping groove is a through hole formed in the upper shell, two sides of the clamping groove are communicated with the outside atmosphere and the inner space of the upper shell respectively, a gap is formed between the clamping sheet and the clamping groove, and the gap is the first air inlet.

Furthermore, two sides of the clamping groove are respectively communicated with the external atmosphere and the second space.

Further, the liquid storage bottle is provided with a bottle mouth, a bottle cap covers the bottle mouth, a third air inlet hole is formed in the bottle cap, and the third air inlet hole is communicated with the second air inlet hole.

Furthermore, the lower side of the lower cover is provided with an annular connecting groove, the bottle cap is clamped in the connecting groove, a first air inlet gap is formed between the bottle cap and the connecting groove, and the first air inlet gap is communicated with the third air inlet hole.

Furthermore, a second air inlet gap is formed between the liquid storage bottle and the lower cover, and the second air inlet gap is communicated with the first air inlet gap and the second air inlet hole respectively.

The utility model provides a foam generating device, foam generating device has foretell air inlet structure, be equipped with the pump in the upper shell, the pump has inlet and air inlet, the inlet with the stock solution bottle is linked together, the air inlet with the inner space of upper shell is linked together.

Further, the pump is located in the first space, and the air inlet is communicated with the first space.

Furthermore, a first liquid inlet hole is formed in the bottle cap and communicated with liquid in the liquid storage bottle through a liquid inlet pipe, a second liquid inlet hole is formed in the lower cover and communicated with the first liquid inlet hole, a third liquid inlet hole is formed in the interlayer and communicated with the second liquid inlet hole, and the third liquid inlet hole is communicated with the liquid inlet.

Furthermore, the lower side of the second liquid inlet hole is provided with a liquid guide convex column, the liquid guide convex column is of a cylindrical structure with a hollow interior, and the liquid guide convex column is inserted into the first liquid inlet hole and is communicated with the second liquid inlet hole and the first liquid inlet hole.

Further, the upside in second feed liquor hole sets up the annular groove, second feed liquor hole site is in the annular groove, it is corresponding, set up the feed liquor recess on the interlayer, third feed liquor hole site is in the feed liquor recess, the relative lid of feed liquor recess and annular groove forms a liquid and holds the chamber together, follows second feed liquor hole exhaust liquid is in liquid holds the intracavity gathering, later passes through third feed liquor hole gets into in the pump.

Furthermore, a one-way valve mounting seat is arranged in the annular groove, a one-way valve and a notch are arranged on the one-way valve mounting seat, one side of the one-way valve is communicated with the second liquid inlet hole through the notch, and the other side of the one-way valve is communicated with the third liquid inlet hole.

A hand washer is provided with the foam generating device.

Compared with the prior art, air inlet structure, foam generating device and machine of washing hand have more pleasing to the eye, difficult weeping, simple structure, the advantage of being convenient for make.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic side view of the hand washing machine of the present invention;

fig. 2 is a schematic view of a three-dimensional structure of the hand washing machine of the present invention;

fig. 3 is a schematic perspective view of the upper housing of the present invention at a first viewing angle;

fig. 4 is a schematic perspective view of the upper housing of the present invention at a second viewing angle;

fig. 5 is a schematic perspective view of the upper housing of the present invention at a third viewing angle;

fig. 6 is a schematic perspective view of the upper housing of the present invention at a fourth viewing angle;

fig. 7 is a schematic perspective view of the upper housing of the present invention at a fifth viewing angle;

fig. 8 is a schematic perspective view of the upper case of the present invention at a sixth viewing angle;

fig. 9 is a schematic perspective view of the upper case of the present invention at a seventh viewing angle;

fig. 10 is a schematic perspective view of a battery compartment cover according to the present invention at a first viewing angle;

fig. 11 is a schematic perspective view of the battery compartment cover of the present invention at a second viewing angle;

fig. 12 is a schematic perspective view of the liquid storage bottle of the present invention at a first viewing angle;

fig. 13 is a schematic perspective view of the liquid storage bottle of the present invention at a second viewing angle;

fig. 14 is a schematic perspective view of the bottle cap according to the present invention at a first viewing angle;

fig. 15 is a schematic perspective view of the bottle cap according to the present invention at a second viewing angle;

fig. 16 is a schematic perspective view of the bottle cap according to the present invention at a third viewing angle;

fig. 17 is a schematic perspective view of the lower cover of the present invention at a first viewing angle;

fig. 18 is a schematic perspective view of the lower cover of the present invention at a second viewing angle;

fig. 19 is a schematic perspective view of the lower cover of the present invention at a third viewing angle;

fig. 20 is a schematic view of the back view structure of the hand washing machine of the present invention;

fig. 21 is a schematic cross-sectional view taken along line a-a in fig. 20.

Description of reference numerals:

1-upper shell, 11-upper cover, 12-interlayer, 121-pump air inlet hole, 122-third liquid inlet hole, 123-liquid inlet groove, 124-air guide protrusion, 125-buffer groove, 13-foam outlet, 14-battery compartment, 141-lower clamping groove, 142-upper clamping groove, 2-liquid storage bottle, 21-bottle mouth, 3-battery compartment cover, 31-lower clamping sheet, 32-upper clamping sheet, 33-heat dissipation hole, 4-bottle cap, 41-first connecting part, 42-first liquid inlet hole, 43-third air inlet hole, 44-air inlet guide groove, 5-lower cover, 51-second air inlet hole, 52-connecting groove, 521-second connecting part, 53-second liquid inlet hole, 54-liquid guide convex column, 55-one-way valve mounting seat, 551-notch, 6-first intake gap, 7-second intake gap.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, the first information may also be referred to as second information, and similarly, the second information may also be referred to as first information, without departing from the scope of the present invention. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Example 1

As shown in fig. 1 to 21, an air inlet structure comprises an upper shell 1, a lower cover 5 and a liquid storage bottle 2:

the interior of the upper shell 1 is hollow, a pump is arranged in the upper shell 1, and the pump can mix gas and liquid entering the pump to generate foam;

the lower cover 5 covers the lower end of the upper shell 1;

the liquid storage bottle 2 is connected with the lower cover 5;

the upper shell 1 is provided with a first air inlet;

the first air inlet hole is communicated with the inner space of the upper shell 1, and external air can enter the upper shell 1 through the first air inlet hole;

the lower cover 5 is provided with a second air inlet 51, the second air inlet 51 is respectively communicated with the liquid storage bottle 2 and the interior of the upper shell 1, and external air can enter the liquid storage bottle 2 through the first air inlet and the second air inlet 51 in sequence.

Specifically, when in use, external air can enter the upper shell 1 through the first air inlet hole to supply air to the pump positioned in the upper shell 1; meanwhile, external air can enter the upper shell 1 through the first air inlet and then enter the liquid storage bottle 2 through the second air inlet 51, on one hand, the air is respectively supplied to the inside of the liquid storage bottle 2 and the pump in the upper shell 1 through the same first air inlet on the upper shell 1, so that the first air inlet can be multipurpose, and the air inlet structure is simpler and more attractive.

Further, the upper part of the upper shell 1 covers the upper cover 11, the first space is a space between the upper cover 11 and the interlayer 12, and the second space is a space between the interlayer 12 and the lower cover 5.

As some embodiments of the present application, the upper cover 11 and the upper case 1 may be separately prepared and then assembled together, or may be integrally prepared.

As some embodiments of the present application, the lower cover 5 and the upper case 1 may be separately prepared and then assembled together, or may be integrally prepared.

Further, an interlayer 12 is arranged in the upper shell 1, the interlayer 12 divides the inner space of the upper shell 1 into an upper part and a lower part, the space between the upper cover 11 and the interlayer 12 is a first space, the space between the interlayer 12 and the lower cover 5 is a second space, a pump air inlet 121 is arranged on the interlayer 12, and the first space and the second space are communicated through the pump air inlet 121; the first air inlet hole is positioned between the lower cover 5 and the partition layer 12, the first air inlet hole is communicated with the pump air inlet hole 121, and outside air sequentially enters the first space through the first air inlet hole and the pump air inlet hole 121.

As some embodiments of the present application, the partition 12 and the upper case 1 may be separately prepared and then assembled together, or may be integrally prepared, and preferably, the partition 12 is integrally injection-molded with the upper case 1.

Furthermore, a partial area of the partition 12 protrudes into the first space, a buffer groove 125 is formed at the lower side of the partition 12, and the pump air inlet hole 121 is located at the bottom of the buffer groove 125.

The buffer groove 125 is arranged to expand the capacity of the second space, and a gas accommodating cavity with a large volume is formed between the partition layer 12 and the lower cover 5, so that external gas can be buffered in the buffer groove 125, and the gas supply from the pump gas inlet 121 to the upper part of the partition layer 12 is more stable and uniform; on the other hand, the distance between the pump air inlet hole 121 and the lower cover 5 can be increased, so that when the hand washing machine is rightly arranged and liquid in the liquid storage bottle 2 is leaked carelessly, the liquid is not easy to enter the first space through the pump air inlet hole 121, and the work of the pump is influenced.

Furthermore, an air guide protrusion 124 is disposed on the lower side of the pump air inlet hole 121, the air guide protrusion 124 is located in the buffer slot 125, the air guide protrusion 124 is hollow, and the air guide protrusion 124 is communicated with the pump air inlet hole 121.

The arrangement of the air guide bulge 124 ensures that when the hand washing machine leaks due to reasons such as being turned upside down carelessly, liquid firstly gathers in the buffer groove 125 and cannot immediately enter the first space through the pump air inlet hole 121, and only when the liquid level in the buffer groove 125 is higher than the air guide bulge 124, the liquid can enter the first space, so that the risk of liquid inlet of the first space can be reduced.

Further, a battery compartment 14 is formed on the interlayer 12, a compartment opening is formed in a position of the upper housing 1 opposite to the battery compartment 14, the compartment opening is a through hole formed in the upper object 1, and a battery can be loaded into the battery compartment 14 from the compartment opening. In addition, cover battery storehouse lid 3 on the bin mouth, the edge of battery storehouse lid 3 sets up the joint piece, and is corresponding, the bin mouth edge of going up casing 1 sets up the joint groove, the joint piece can with joint groove joint, battery storehouse lid 3 and last casing 1 pass through the joint piece realizes the joint with the joint groove.

Furthermore, the clamping groove is a through hole formed in the upper shell 1, two sides of the clamping groove are communicated with the outside atmosphere and the inner space of the upper shell 1 respectively, the cross sectional area of the clamping sheet is smaller than that of the clamping groove, so that the clamping sheet cannot block the clamping groove completely, a gap is formed between the clamping sheet and the clamping groove, and the gap is the first air inlet. At this time, the clamping groove can be used as an assembling groove and a first air inlet hole of the battery compartment cover 3 at the same time.

During the use, outside atmosphere at first gets into through the clearance between joint piece and the joint groove in the assembly groove, later get into through the assembly groove the inside of last casing 1, then respectively through pump inlet port 121 and second inlet port 51 to first space and stock solution bottle 2 transport gas, first inlet port and assembly groove unite two into one, not only make air inlet structure's simple structure, pleasing to the eye, moreover first inlet port is hidden go up the junction of casing 1 and battery compartment lid 3, difficult discovery, more pleasing to the eye.

Specifically, the upside of battery storehouse lid 3 sets up joint piece 32, downside and sets up joint piece 31 down, and is corresponding, the upside of the upper shed of going up casing 1 sets up joint groove 142, downside sets up joint groove 141 down, during the assembly, will go up joint piece 32 and last joint groove 142 joint, joint piece 31 and lower joint groove 141 joint down can accomplish the assembly of battery storehouse lid 3.

Preferably, lower joint groove 141 is located between lower cover 5 and the interlayer 12, lower joint groove 141 is the through-hole, the both sides of lower joint groove 141 respectively with outside atmosphere with the inside of going up casing 1 is linked together, the cross-sectional area of lower joint piece 31 is less than the cross-sectional area of lower joint groove 141, makes joint piece 31 can not block up completely down joint groove 141 down, lower joint piece 31 and the lower joint groove 141 between have the clearance, the clearance is promptly first inlet port. At this time, the lower engaging groove 141 can be used as an assembling groove and a first air inlet hole of the battery compartment cover 3.

In addition, the upper clamping groove 142 may be a through hole or a blind hole, when the upper clamping groove 142 is a through hole, external air may pass through the lower clamping groove 141 and the upper clamping groove 142 simultaneously to enter the upper casing 1, and when the upper clamping groove 142 is a blind hole, external air may only pass through the lower clamping groove 141 to enter the upper casing 1.

Furthermore, the battery compartment cover 3 is provided with a heat dissipation hole 33, and the heat dissipation hole 33 is communicated with the lower clamping groove 141 inside the battery compartment 14. At this moment, outside air can loop through louvre 33 with lower joint groove 141 gets into the second space, also can directly pass through lower joint groove 141 gets into the second space, louvre 33 and lower joint groove 141's setting can increase the entering on the one hand the airflow in the second space, and on the other hand, the airflow is passing through louvre 33 with lower joint groove 141 gets into during the second space, can take away the heat in the battery compartment 14, it is right battery in the battery compartment 14 plays better radiating effect.

Further, a foam outlet 13 is arranged on the upper shell 1, and the foam outlet 13 is communicated with a foam discharge port of the pump.

Further, as shown in fig. 12 to 16, the liquid storage bottle 2 has a bottle mouth 21, the bottle mouth 21 is covered with a bottle cap 4, a third air inlet hole 43 is formed in the bottle cap 4, the third air inlet hole 43 is a through hole, and the third air inlet hole 43 is communicated with the second air inlet hole 51, so that external air can sequentially enter the liquid storage bottle 2 through the first air inlet hole, the second air inlet hole 51 and the third air inlet hole 43.

Specifically, as shown in fig. 17 to 19, an annular connecting groove 52 is disposed on the lower side of the lower cover 5, a second connecting portion 521 is disposed on the inner side wall of the connecting groove 52, the second connecting portion 521 is an arc-shaped protrusion disposed along the inner side of the connecting groove 52, correspondingly, a first connecting portion 41 is disposed on the outer side of the bottle cap 4, the first connecting portion 41 is an arc-shaped protrusion disposed along the outer side of the bottle cap 4, and the first connecting portion 41 and the second connecting portion 521 can be connected together in a clamping manner.

As some embodiments of the present application, the first connection portion 41 and the second connection portion 521 are both "L" shaped protrusions, and the first connection portion 41 and the second connection portion 521 are opposite in direction and are arranged at 180 ° opposite, so that the first connection portion 41 and the second connection portion 521 can be engaged together by rotation,

further, as shown in fig. 21, after the bottle cap 4 is snapped together with the connecting groove 52, the first connecting portion 41 and the second connecting portion 521 do not completely close the annular gap between the bottle cap 4 and the connecting groove 52, so that the gap between the bottle cap 4 and the connecting groove 52 forms a first air intake gap 6, and the first air intake gap 6 is communicated with the third air intake hole 43.

Further, as shown in fig. 21, after the bottle cap 4 is fastened to the connecting groove 52, a gap is also formed between the upper portion of the liquid storage bottle 2 and the lower cover 5, a second air inlet gap 7 is formed between the upper portion of the liquid storage bottle 2 and the lower cover 5, and the second air inlet gap 7 is respectively communicated with the first air inlet gap 6 and the second air inlet hole 51.

Furthermore, the lower extreme edge of going up casing 1 with the surface of stock solution bottle 2 is closely laminated, makes go up the liquid between casing 1 and the stock solution bottle 2 can't follow leak out between casing 1 and the stock solution bottle 2.

When air is fed into the liquid storage bottle 2, external air firstly enters the second space through the first air inlet hole, then enters the second air inlet gap 7 through the second air inlet hole 51, then continuously flows into the first air inlet gap 6, and finally enters the liquid storage bottle 2 through the third air inlet hole 43 on the bottle cap 4.

Further, as shown in fig. 14 to 16, an air inlet guide groove 44 is further provided on the bottle cap 4, the third air inlet hole 43 is located in the air inlet guide groove 44, and the air inlet guide groove 44 is communicated with the first air inlet gap 6. Through the arrangement of the air inlet guide groove 44, the air in the first air inlet gap 6 can be promoted to be preferentially collected into the air inlet guide groove 44 and then enter the liquid storage bottle 2 through the third air inlet hole 43 in the air inlet guide groove 44

As some embodiments of the present application, before the bottle cap 4 is coupled to the coupling groove 52, a gasket may be disposed in the air inlet guide groove 44, and the through hole of the bottle cap 4 is sealed by the gasket.

In addition, this application still provides a foam generating device, foam generating device has foretell air inlet structure, in addition, go up and be equipped with the pump in the casing 1, the pump has inlet and air inlet, the inlet with stock solution bottle 2 is linked together, the air inlet with the inner space of going up casing 1 is linked together. Preferably, the pump is located in the first space, and the air inlet is communicated with the first space.

Further, still set up first feed liquor hole 42 on the bottle lid 4, first feed liquor hole 42 is linked together through the liquid inlet pipe and the liquid in the stock solution bottle 2, and is corresponding, set up second feed liquor hole 53 on the lower cover 5, second feed liquor hole 53 with first feed liquor hole 42 is linked together, set up third feed liquor hole 122 on interlayer 12, third feed liquor hole 122 with second feed liquor hole 53 is linked together, third feed liquor hole 122 is linked together with the inlet of pump.

Furthermore, the first liquid inlet hole 42 is located in the air inlet guide groove 44, the second liquid inlet hole 53 is provided with a liquid guiding convex column 54, the liquid guiding convex column 54 is a cylindrical structure with a hollow interior, and the liquid guiding convex column 54 is inserted into the first liquid inlet hole 42 to communicate the second liquid inlet hole 53 with the first liquid inlet hole 42. The liquid guide pillar 54 can isolate the first liquid inlet hole 42 from the air inlet guide groove 44, so that the liquid flowing out of the first liquid inlet hole 42 is not easy to leak into the air inlet guide groove 44.

Further, as shown in fig. 17-19, second feed liquor hole 53 is located in the connecting groove 52, second feed liquor hole 53 is close to one side of bottle lid 4 sets up leads liquid projection 54, and the offside sets up an annular groove, second feed liquor hole 53 is located in the annular groove, corresponding, also be equipped with a feed liquor recess 123 on the interlayer 12, set up third feed liquor hole 122 in the feed liquor recess 123, feed liquor recess 123 is in the same place with the relative lid of annular groove, forms a liquid and holds the chamber, follows second feed liquor hole 53 exhaust liquid is in the intracavity gathering is held to the liquid, later passes through in third feed liquor hole 122 gets into the pump.

As some embodiments of the present application, a check valve mounting seat 55 is disposed in the annular groove, a check valve and a notch 551 are disposed on the check valve mounting seat 55, one side of the check valve is communicated with the second liquid inlet hole 53 through the notch 551, and the other side is communicated with the third liquid inlet hole 122. The liquid discharged from the second liquid inlet hole 53 is collected in the liquid containing chamber, and then enters the third liquid inlet hole 122 through the notch 551 and the check valve, and finally enters the pump through the third liquid inlet hole 122.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (18)

1. An air intake structure, characterized by comprising an upper housing (1), an upper cover (11), a lower cover (5) and a liquid storage bottle (2):

the upper shell (1) is hollow;

the upper cover (11) covers the upper end of the upper shell (1);

the lower cover (5) covers the lower end of the upper shell (1);

the liquid storage bottle (2) is connected with the lower cover (5);

the upper shell (1) is provided with a first air inlet;

the first air inlet hole is communicated with the inner space of the upper shell (1), and external air can enter the upper shell (1) through the first air inlet hole;

the lower cover (5) is provided with a second air inlet hole (51), the second air inlet hole (51) is communicated with the interior of the liquid storage bottle (2) and the interior of the upper shell (1), and external air can enter the liquid storage bottle (2) through the first air inlet hole and the second air inlet hole (51) in sequence.

2. The air intake structure according to claim 1, wherein a partition (12) is provided inside the upper case (1), the partition (12) divides an internal space of the upper case (1) into two parts, a space between the upper cover (11) and the partition (12) is referred to as a first space, and a space between the partition (12) and the lower cover (5) is referred to as a second space.

3. An air intake structure according to claim 2, wherein the first air intake hole is located between the lower cover (5) and a partition (12), a pump air intake hole (121) is provided on the partition (12), and the first air intake hole is communicated with the pump air intake hole (121).

4. An air intake structure according to claim 3, wherein a partial area of the partition (12) is protruded into the first space, a buffer groove (125) is formed at a lower side of the partition (12), and the pump air intake hole (121) is located at a groove bottom of the buffer groove (125).

5. The air intake structure according to claim 4, wherein an air guide protrusion (124) is provided in the buffer groove (125), the air guide protrusion (124) is hollow inside, and the air guide protrusion (124) is communicated with the pump air intake hole (121).

6. The air inlet structure of claim 2, characterized in that a battery bin (14) is formed on the interlayer (12), a bin opening communicated with the battery bin (14) is formed in the upper shell (1), a battery bin cover (3) covers the bin opening, a clamping piece is arranged on the battery bin cover (3), correspondingly, a clamping groove is formed in the bin opening, and the clamping piece is clamped with the clamping groove.

7. The air intake structure of claim 6, wherein the clamping groove is a through hole provided on the upper housing (1), and two sides of the clamping groove are respectively communicated with the external atmosphere and the inner space of the upper housing (1), and a gap is provided between the clamping sheet and the clamping groove, and the gap is the first air intake hole.

8. The air intake structure according to claim 7, wherein both sides of the catching groove communicate with the outside atmosphere and the second space, respectively.

9. The air inlet structure of claim 1, wherein the liquid storage bottle (2) is provided with a bottle mouth (21), a bottle cap (4) is covered on the bottle mouth (21), a third air inlet hole (43) is formed in the bottle cap (4), and the third air inlet hole (43) is communicated with the second air inlet hole (51).

10. The air inlet structure of claim 9, characterized in that an annular connecting groove (52) is arranged at the lower side of the lower cover (5), the bottle cover (4) is clamped in the connecting groove (52), a first air inlet gap (6) is arranged between the bottle cover (4) and the connecting groove (52), and the first air inlet gap (6) is communicated with the third air inlet hole (43).

11. The air intake structure according to claim 10, wherein a second air intake gap (7) is provided between the liquid storage bottle (2) and the lower cover (5), and the second air intake gap (7) is respectively communicated with the first air intake gap (6) and the second air intake hole (51).

12. A foam generating device, characterized in that the foam generating device has the air inlet structure as claimed in any one of the claims 1 to 11, a pump is arranged in the upper housing (1), the pump has a liquid inlet and an air inlet, the liquid inlet is communicated with the liquid storage bottle (2), and the air inlet is communicated with the inner space of the upper housing (1).

13. The foam generating apparatus as recited in claim 12, wherein the pump is located in the first space, and the air inlet is in communication with the first space.

14. The foam generator as claimed in claim 12, wherein a first liquid inlet hole (42) is formed in the bottle cap (4), the first liquid inlet hole (42) is communicated with the liquid in the liquid storage bottle (2) through a liquid inlet pipe, a second liquid inlet hole (53) is formed in the lower cap (5), the second liquid inlet hole (53) is communicated with the first liquid inlet hole (42), a third liquid inlet hole (122) is formed in the partition layer (12), the third liquid inlet hole (122) is communicated with the second liquid inlet hole (53), and the third liquid inlet hole (122) is communicated with the liquid inlet.

15. The foam generator as recited in claim 14, wherein a liquid guiding protrusion (54) is disposed at a lower side of the second liquid inlet hole (53), the liquid guiding protrusion (54) is a cylindrical structure with a hollow interior, and the liquid guiding protrusion (54) is inserted into the first liquid inlet hole (42) to communicate the second liquid inlet hole (53) with the first liquid inlet hole (42).

16. Foam generator as claimed in claim 14, characterized in that an annular groove is provided on the upper side of said second inlet opening (53), said second inlet opening (53) is located in said annular groove, correspondingly, an inlet groove (123) is provided on said partition (12), said third inlet opening (122) is located in said inlet groove (123), said inlet groove (123) and said annular groove are relatively covered together to form a liquid containing chamber, and the liquid discharged from said second inlet opening (53) is collected in said liquid containing chamber and then enters the pump through said third inlet opening (122).

17. The foam generating apparatus as claimed in claim 16, wherein a check valve mounting seat (55) is provided in the annular groove, a check valve and a notch (551) are provided on the check valve mounting seat (55), one side of the check valve communicates with the second liquid inlet hole (53) through the notch (551), and the other side communicates with the third liquid inlet hole (122).

18. A hand washing machine characterised in that it has a foam generating device as claimed in any one of claims 12 to 17.

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