Nasal aspirator

Abstract

A nasal aspirator comprises: a suction tip provided with a first channel; a cavity is formed in the suction head shell; the air bag body comprises an air bag and an air bag body mounting part; the suction head bottom cover is provided with a mounting seat and a second channel, the air bag can be fixed in the cavity through the air bag body mounting part, the cavity is divided into a storage cavity and an air bag cavity, the first channel is communicated with the storage cavity, and the second channel is communicated with the air bag cavity; the positive pressure pump comprises a positive pressure pump air outlet, the machine body shell is provided with an air bag air inlet matched with the second channel, and the positive pressure pump air outlet is connected with the air bag air inlet through an electromagnetic valve. Due to the fact that the nasal aspirator body enables the air output by the positive pressure pump to directly enter the suction head of the nasal aspirator through the electromagnetic valve and the air bag air inlet pipe, the nasal aspirator body does not need to be provided with a negative pressure cavity, and the structure of the nasal aspirator body is simplified. Due to the fact that the air bag divides the cavity into the containing cavity and the air bag cavity, the inflated air bag releases air instantly, normal atmospheric pressure in the containing cavity is converted into negative pressure instantly, snot can be sucked rapidly, and user experience is improved.

Description

Technical Field

[0001] The present application relates to a medical care instrument, and in particular to a nasal aspirator. Background Art

[0002] A nasal aspirator is an instrument used to suck out nasal secretions, usually used when infants and young children have nasal congestion and cannot expel nasal secretions. When working, the nasal aspirators currently on the market use the air pump inside the body to draw suction, create negative pressure, and suck out the secretions. Existing airbag-isolated nasal aspirators generally use a negative pressure pump. The negative pressure generated by the negative pressure pump at a time is not enough to cause a large deformation of the airbag body, so that the negative pressure generated in the storage cavity is not enough to absorb the nasal mucus. An intermediate negative pressure chamber is required to accumulate and store the negative pressure for a period of time, making its structure complicated. In addition, the existing nasal aspirators with airbag structures absorb secretions by intermittent suction. The instantaneous suction force generated by the nasal aspirator is not strong enough, and the suction experience is poor and the efficiency is low. Summary of the invention

[0003] The technical problem to be solved by the present application is to provide a nasal aspirator in view of the deficiencies in the prior art.

[0004] The technical problem to be solved by this application is solved by the following technical solutions:

[0005] A nasal aspirator, comprising a nasal aspirator body and a nasal aspirator suction head arranged on the nasal aspirator body, the nasal aspirator suction head comprising a suction head shell, an air bag body, a suction head bottom cover and a probe suction end, the nasal aspirator body comprising a body shell and an air pump, a power supply and a solenoid valve arranged in the body shell, the power supply being electrically connected to the air pump and the solenoid valve respectively;

[0006] The suction end is provided with a first channel;

[0007] The suction head shell has a cavity inside and includes a first opening and a second opening, the first opening, the cavity and the second opening are connected, and the suction tip cooperates with the first opening;

[0008] The airbag body comprises an airbag and an airbag body mounting portion, one end of the airbag is provided with an airbag opening end, and the airbag body mounting portion is arranged at the airbag opening end;

[0009] The suction head bottom cover is provided with a mounting seat and a second channel, the mounting seat cooperates with the second opening, the airbag can be fixed in the cavity through the airbag mounting portion and the cavity is divided into a storage cavity and an airbag cavity, the first channel is communicated with the storage cavity, and the second channel is communicated with the airbag cavity;

[0010] The air pump comprises a positive pressure pump, which comprises a positive pressure pump air outlet. The body shell is provided with an air bag air inlet which cooperates with the second channel. The positive pressure pump air outlet is connected to the air bag air inlet through the solenoid valve.

[0011] In the above-mentioned nasal aspirator, the airbag body mounting portion includes an airbag connecting portion extending radially outward from the opening end of the airbag and a folded edge folded up from the edge of the airbag connecting portion.

[0012] The above-mentioned nasal aspirator, the suction head housing comprises a first connecting portion and a second connecting portion, the first connecting portion is arranged at the first opening, and the second connecting portion is arranged at the second opening;

[0013] A first hook is provided in the suction end, and a second hook matching with the first hook is provided in the first connecting portion;

[0014] The second connecting portion includes an annular airbag limiting ring and a limiting connecting piece, one end of the limiting connecting piece is connected to the second opening, the other end of the limiting connecting piece is connected to the airbag limiting ring, and the airbag limiting ring cooperates with the airbag limiting groove.

[0015] In the above-mentioned nasal aspirator, the mounting seat includes a base plate and a support plate surrounding the base plate, and the folded edge is clamped between the airbag limiting ring and the support plate.

[0016] In the above-mentioned nasal aspirator, the second connecting part further includes a limiting protrusion, the limiting protrusion is arranged on the limiting connecting piece, and the supporting plate is provided with a locking position that cooperates with the limiting protrusion.

[0017] The above-mentioned nasal aspirator, the solenoid valve, includes a first connection port of the solenoid valve, a second connection port of the solenoid valve and a third connection port of the solenoid valve, the air outlet of the positive pressure pump is connected to the third connection port of the solenoid valve, the second connection port of the solenoid valve is connected to the second channel, and the first connection port of the solenoid valve is connected to the atmosphere.

[0018] The above-mentioned nasal aspirator also includes a control device, which is used to be electrically connected to the positive pressure pump and the solenoid valve respectively, so that when the solenoid valve is in a working state, the second connection port of the solenoid valve is connected to the third connection port of the solenoid valve, and when it is not in a working state, the second connection port of the solenoid valve is connected to the first connection port of the solenoid valve.

[0019] The above-mentioned nasal aspirator, the body shell includes a body front shell and a body rear cover that cooperate with each other, the rear cover is provided with a rear cover accommodating cavity, the solenoid valve and the positive pressure pump are arranged in the rear cover accommodating cavity, and the suction head bottom cover and the body front shell are integrally formed.

[0020] The above-mentioned nasal aspirator also includes a partition, the front shell of the body is provided with a front shell accommodating cavity, the control device includes a circuit board and a button, the circuit board is arranged in the front shell accommodating cavity, the partition is used to support and fix the solenoid valve and the positive pressure pump, and the button is arranged on the front shell of the body.

[0021] In the above-mentioned nasal aspirator, a first limiting device and a second limiting device are provided on the partition, the first limiting device cooperates with the solenoid valve, the second limiting device cooperates with the positive pressure pump, the first limiting device includes a limiting frame, and the second limiting device includes a limiting opening.

[0022] Due to the adoption of the above technical solution, the beneficial effects of this application are:

[0023] The nasal aspirator provided in the embodiment of the present application comprises a nasal aspirator body and a nasal aspirator suction head arranged on the nasal aspirator body, the nasal aspirator suction head comprises a suction head shell, an air bag body, a suction head bottom cover and an immersion suction end head, the nasal aspirator body comprises a body shell and an air pump and an electromagnetic valve arranged in the body shell; the suction end head is provided with a first channel; the suction head shell has a cavity arranged therein and the suction head shell comprises a first opening and a second opening, the first opening, the cavity and the second opening are connected, and the suction end head cooperates with the first opening; the air bag body comprises an air bag and an air bag The airbag body mounting part, one end of the airbag is provided with an airbag opening end, and the airbag body mounting part is arranged at the airbag opening end; the bottom cover of the suction head is provided with a mounting seat and a second channel, the mounting seat and the second opening cooperate, the airbag body mounting part can fix the airbag in the cavity and divide the cavity into a storage cavity and an airbag cavity, the first channel is connected to the storage cavity, and the second channel is connected to the airbag cavity; the air pump includes a positive pressure pump, the positive pressure pump includes a positive pressure pump outlet, the body shell is provided with an airbag inlet that cooperates with the second channel, and the positive pressure pump outlet is connected to the airbag inlet through a solenoid valve. Since the nasal suction device body directly enters the nasal suction device suction head through the solenoid valve and the airbag inlet pipe, the nasal suction device body does not need to be provided with a negative pressure cavity, which simplifies the structure of the nasal suction device body. Since the airbag divides the cavity into a storage cavity and an airbag cavity, the airbag that is continuously inflated by the positive pressure pump instantly releases gas, so that the storage cavity is instantly converted from normal atmospheric pressure to negative pressure, which can quickly suck snot and improve user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A cross-sectional view of a nasal aspirator provided in an embodiment of the present application in one embodiment;

[0025] Figure 2 A cross-sectional view of another embodiment of the nasal aspirator provided in an embodiment of the present application;

[0026] Figure 3 A schematic diagram of the structure of a nasal aspirator suction head in one embodiment of the present application;

[0027] Figure 4 A schematic diagram of the structure of a nasal aspirator body provided in an embodiment of the present application in one embodiment;

[0028] Figure 5 A schematic diagram of the structure of a suction head housing provided in an embodiment of the present application in one embodiment;

[0029] Figure 6 A schematic diagram of the structure of an airbag provided in an embodiment of the present application in one embodiment;

[0030] Figure 7 A schematic diagram of the structure of a suction head bottom cover in one embodiment of the present application;

[0031] Figure 8 A cross-sectional view of a nasal aspirator suction head provided in an embodiment of the present application in one embodiment;

[0032] Fig. 9 for Figure 8 A partial enlarged schematic diagram of part A in FIG.

[0033] Fig.10 A schematic diagram of the structure of the nasal aspirator body provided in an embodiment of the present application when the body rear cover is not installed;

[0034] Fig.11 A schematic diagram of the three-dimensional structure of a partition provided in an embodiment of the present application;

[0035] Fig.12 A schematic diagram of the discrete components of a nasal aspirator body provided in an embodiment of the present application in one implementation manner. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are for making the present application better understood. However, those skilled in the art can easily recognize that some features can be omitted in different situations, or can be replaced by other elements, materials, methods. In some cases, some operations related to the present application are not shown or described in the specification, this is to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations according to the description in the specification and the general technical knowledge in the art.

[0037] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

[0038] The serial numbers assigned to the components in this article, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning.

[0039] In addition, the technical features and technical solutions described herein may be combined in any suitable manner in one or more embodiments. It is easy for a person skilled in the art to understand that the steps or operation sequence of the methods related to the embodiments provided herein may also be changed. Therefore, any sequence in the drawings and embodiments is only for illustrative purposes and does not imply a requirement to follow a certain sequence unless it is explicitly stated that a certain sequence is required.

[0040] like Figures 1 to 4 As shown, the nasal aspirator provided in an embodiment of the present application, in one implementation manner, comprises a nasal aspirator suction head and a nasal aspirator body, wherein the nasal aspirator suction head is arranged on the nasal aspirator body.

[0041] The suction head of the nasal aspirator may include a suction tip 100, a suction head shell 200, an air bag body 300 and a suction head bottom cover 400. The suction tip 100 is a probe-type structure for probing into the nasal cavity.

[0042] The nasal aspirator body may include a body shell 500, a power supply 600, a solenoid valve 700 and an air pump. The body shell 500 is provided with an airbag air inlet 510, and the airbag air inlet 510 cooperates with the second channel. The power supply 600, the solenoid valve 700 and the positive pressure pump 800 are all arranged in the body shell 500. The power supply 600 is used for power supply, and the power supply 600 is electrically connected to the solenoid valve 700 and the positive pressure pump 800 respectively. In one embodiment, the power supply 600 can be a battery, and specifically a rechargeable battery can be selected.

[0043] The suction end 100 is provided with a first channel 110. In one embodiment, the suction end 100 may also be provided with a one-way valve 120. When the airbag 300 is inflated, the one-way valve 120 is opened to exhaust air outwards, and when the snot is sucked, the one-way valve 120 is closed.

[0044] like Figure 5 As shown, a cavity is provided in the suction head housing 200 , and the suction head housing 200 includes a first opening 210 and a second opening 220 . The first opening 210 , the cavity and the second opening 220 are connected, and the suction tip 100 cooperates with the first opening 210 .

[0045] like Figure 6 As shown, the airbag body 300 includes an airbag 310 and an airbag body mounting portion 320. An airbag opening end is provided at one end of the airbag 310, and the airbag body mounting portion 320 is disposed at the airbag opening end.

[0046] like Figure 7 As shown, the suction head bottom cover 400 is provided with a mounting seat 410 and a second channel 420. The mounting seat 410 and the second opening 220 cooperate with each other, and the airbag 310 can be fixed in the cavity through the airbag body mounting portion 320. The airbag 310 fixed in the cavity can divide the cavity into a storage cavity 230 and an airbag cavity 240. The first channel 110 is connected to the storage cavity 230, and the second channel 420 is connected to the airbag cavity 240.

[0047] In one embodiment, the air pump may include a positive pressure pump 800, the positive pressure pump 800 includes a positive pressure pump outlet 810, the body shell 500 is provided with an airbag air inlet 510, the airbag air inlet 510 cooperates with the second channel 420, and the positive pressure pump outlet 810 is connected to the airbag air inlet 510 through an electromagnetic valve 700.

[0048] like Figure 8 , Fig. 9 As shown, the airbag body mounting portion 320 includes an airbag connecting portion 321, and the airbag connecting portion 321 extends radially outward from the opening end of the airbag. The airbag body 300 can be made of a soft and elastic material. In this embodiment, the airbag body 300 is made of silicone. In another embodiment, the airbag body mounting portion can also include a folded edge 322 folded from the edge of the airbag connecting portion 321 toward the airbag 310, and an annular airbag limiting groove 323 is provided in the folded edge 322, and an annular airbag limiting groove 323 is provided between the folded edge 322 and the airbag 310.

[0049] Since the present application can install the airbag 310 in the cavity of the suction head shell 200 by means of the airbag body mounting portion 320 disposed at one end of the airbag, the installation is simple. Since the airbag 310 divides the cavity into a storage cavity 230 and an airbag cavity 240, the inflated airbag 310 instantly releases gas to instantly convert the normal atmospheric pressure in the storage cavity 230 into a negative pressure, and the inhaled nasal secretions such as snot are stored in the storage cavity 230. However, the existing nasal suction device suction head has openings at both ends of the airbag body and needs to be installed on the suction head shell separately, which not only makes the nasal suction device suction head structure complicated, but also increases the difficulty of assembly. The nasal suction device suction head provided by the present application only needs to be installed with the airbag body mounting portion 320 disposed at one end of the airbag, which not only simplifies the structure of the nasal suction device suction head and improves the installation efficiency, but also can quickly absorb nasal secretions such as snot, thereby improving the user experience.

[0050] The nasal aspirator suction head provided in the embodiment of the present application has a suction head shell 200 including a first connecting portion 250 and a second connecting portion. The first connecting portion 250 is arranged at the first opening 210 , and the second connecting portion is arranged at the second opening 220 .

[0051] In one embodiment, the suction tip 100 is provided with a first hook 130, the first connecting portion 250 is provided with a second hook 252, and the first hook 130 cooperates with the second hook 252. In another embodiment, the second connecting portion may include an annular airbag limiting ring 261 and a limiting connector 262, one end of the limiting connector 262 is connected to the second opening 220, the other end of the limiting connector 262 is connected to the airbag limiting ring 261, and the airbag limiting ring 261 cooperates with the airbag limiting groove 323.

[0052] The nasal aspirator suction head provided in the embodiment of the present application, the mounting base 410 includes a base plate 411 and a support plate 412 , the support plate 412 surrounds the base plate 411 , and the folded edge 322 is clamped between the airbag limiting ring 241 and the support plate 412 .

[0053] In one embodiment, the second connection portion may further include a limiting protrusion 263 , which is disposed on the limiting connection member 262 , and the support plate 412 is provided with a locking position 413 , which cooperates with the limiting protrusion 263 .

[0054] When installing the suction head of the nasal aspirator provided in the embodiment of the present application, the airbag body 300 can be placed into the suction head bottom cover 400, and then the limiting protrusion 263 on the suction head shell 200 is aligned with the locking position 413 on the mounting seat 410, and then the airbag limiting ring 261 is inserted into the airbag limiting groove 323 and the suction head shell 200 is rotated so that the limiting protrusion 263 is installed into the locking position 413 and clamped, and the airbag body 300 is sealed and connected with the mounting seat 410, and finally the suction end 100 is put on the first opening 210 of the suction head shell 200, so that the first hook 130 on the suction end 100 is docked and clamped with the second hook 252 on the first connecting part 250.

[0055] like Fig.10 , Fig.12 As shown, the solenoid valve 700 may include a first connection port 710, a second connection port 720 and a third connection port 730 of the solenoid valve, the positive pressure pump outlet 810 is connected to the third connection port 730 of the solenoid valve, the second connection port 720 of the solenoid valve is connected to the second channel, and the first connection port of the solenoid valve is connected to the atmosphere.

[0056] The nasal aspirator body may further include a control device for electrically connecting to the positive pressure pump 800 and the solenoid valve 700, respectively, so that when the solenoid valve is in a working state, the second connection port 720 of the solenoid valve is connected to the third connection port 730 of the solenoid valve, and when it is not in a working state, the second connection port 720 of the solenoid valve is connected to the first connection port 710 of the solenoid valve.

[0057] The housing 500 may include a front housing 520 and a rear housing 530, the front housing 520 and the rear housing 530 cooperate with each other, the rear housing 530 is provided with a rear housing accommodating cavity, and the power supply 600, the solenoid valve 700 and the positive pressure pump 800 are arranged in the rear housing accommodating cavity. The front housing 520 and the rear housing 530 may be made of a variety of materials. In this embodiment, the front housing 520 and the rear housing 530 are respectively made of plastic.

[0058] The nasal aspirator body provided in the embodiment of the present application may further include a partition 530, the front shell 520 of the body is provided with a front shell accommodating cavity, the control device may include a circuit board 910 and a button 920, the circuit board 910 is provided with a control circuit, the circuit board 910 is arranged in the front shell accommodating cavity, the button 920 can be made of a variety of materials, in this embodiment, the button 920 is made of silicone material, the partition 530 is used to support and fix the solenoid valve 700 and the positive pressure pump 800, the button 920 is arranged on the front shell 520 of the body, and the front shell 520 of the body is provided with a button mounting hole 521 that cooperates with the button 920.

[0059] In one embodiment, Fig.11 As shown, the partition plate 530 may be provided with a first limiting device 531 and a second limiting device 532, the first limiting device 531 cooperates with the electromagnetic valve 700, and the second limiting device 532 cooperates with the positive pressure pump 800. The first limiting device 531 includes a limiting frame, the shape of which cooperates with the electromagnetic valve 700, so that one end of the electromagnetic valve 700 is inserted into the limiting frame to fix and support the electromagnetic valve 700, and the second limiting device 532 includes a limiting opening, the shape of which cooperates with the positive pressure pump 800, so that the positive pressure pump 800 can be inserted into the limiting opening to fix and support the positive pressure pump 800.

[0060] The nasal aspirator body provided in the embodiment of the present application, the control device may further include a display screen 930, and the display screen 930 is arranged on the front shell 520 of the body. The display screen 930 may be used to display information such as the remaining battery power, the gear position of the nasal suction, etc.

[0061] The nasal aspirator body provided in the embodiment of the present application may further include an adapter 540, the adapter 540 includes a mounting plate 541 and a hollow column 542, the hollow column 542 is arranged on the mounting plate, and the body front shell 520 and the body rear cover 530 are connected by the adapter 540. In one embodiment, the mounting plate 541 can be fixed to the body front shell 520, and the body rear cover 530 and the body front shell 520 are installed together by self-tapping screws 543 passing through the body rear cover 530.

[0062] The nasal aspirator provided in the embodiment of the present application has the following working process: the positive pressure pump outlet 810 outputs gas, which passes through the third connection port 730 of the solenoid valve, the second connection port 720 of the solenoid valve and the air inlet 510 of the airbag in sequence, and finally enters the airbag cavity 240, so that the airbag 310 slowly expands. When the airbag 310 expands to the required degree, the solenoid valve 700 starts to work, and the gas in the airbag 310 is quickly discharged through the second connection port 720 of the solenoid valve and the first connection port 710 of the solenoid valve in sequence. Since the first connection port 710 of the solenoid valve is connected to the atmosphere, the airbag 310 contracts rapidly, so that negative pressure is quickly generated in the storage cavity 230, and the snot is sucked in through the first channel 110 of the suction terminal 100 and stored in the storage cavity 230.

[0063] The nasal aspirator provided in the embodiment of the present application has no negative pressure chamber provided on the body of the nasal aspirator, and the gas outputted from the positive pressure pump outlet 810 directly passes through the third connection port 730 of the solenoid valve, the second connection port 720 of the solenoid valve and the air inlet 510 of the airbag in sequence, and finally enters the airbag cavity 240, and the airbag 310 contracts instantly after expansion, so that negative pressure is generated in the storage cavity, and secretions such as nasal mucus are sucked into the storage cavity for storage. The present application integrates the storage cavity and the negative pressure cavity into one, and the inflated airbag instantly releases the positive pressure and generates negative pressure in the storage cavity, which not only simplifies the structure of the nasal aspirator, but also because the storage cavity is instantly converted from normal atmospheric pressure to negative pressure, nasal secretions such as nasal mucus can be quickly aspirated, thereby improving the user experience.

[0064] The above contents are further detailed descriptions of the present application in combination with specific implementation methods, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application.

Claims

1. A nasal aspirator, comprising a nasal aspirator body and a nasal aspirator suction head arranged on the nasal aspirator body, the nasal aspirator suction head comprising a suction head shell, an air bag body, a suction head bottom cover and a probe suction end, the nasal aspirator body comprising a body shell and an air pump, a power supply and a solenoid valve arranged in the body shell, the power supply being electrically connected to the air pump and the solenoid valve respectively, characterized in that : The suction end is provided with a first channel; The suction head shell has a cavity inside and includes a first opening and a second opening, the first opening, the cavity and the second opening are connected, and the suction tip cooperates with the first opening; The airbag body comprises an airbag and an airbag body mounting portion, one end of the airbag is provided with an airbag opening end, and the airbag body mounting portion is arranged at the airbag opening end; The suction head bottom cover is provided with a mounting seat and a second channel, the mounting seat cooperates with the second opening, the airbag can be fixed in the cavity through the airbag mounting portion and the cavity is divided into a storage cavity and an airbag cavity, the first channel is communicated with the storage cavity, and the second channel is communicated with the airbag cavity; The air pump comprises a positive pressure pump, which comprises a positive pressure pump air outlet. The body shell is provided with an air bag air inlet which cooperates with the second channel. The positive pressure pump air outlet is connected to the air bag air inlet through the solenoid valve.

2. The nasal aspirator according to claim 1, characterized in that: The airbag body installation portion includes an airbag connecting portion extending radially outward from the opening end of the airbag and a folded edge folded from the edge of the airbag connecting portion.

3. The nasal aspirator according to claim 2, characterized in that: The suction head housing comprises a first connecting portion and a second connecting portion, the first connecting portion is arranged at the first opening, and the second connecting portion is arranged at the second opening; A first hook is provided in the suction end, and a second hook matching with the first hook is provided in the first connecting portion; The second connecting portion includes an annular airbag limiting ring and a limiting connecting piece, one end of the limiting connecting piece is connected to the second opening, the other end of the limiting connecting piece is connected to the airbag limiting ring, and the airbag limiting ring cooperates with the airbag limiting groove.

4. The nasal aspirator according to claim 3, characterized in that: The mounting seat comprises a bottom plate and a support plate surrounding the bottom plate, and the folded edge is clamped between the airbag limiting ring and the support plate.

5. The nasal aspirator according to claim 4, characterized in that: The second connecting portion further comprises a limiting protrusion, the limiting protrusion is arranged on the limiting connecting piece, and the supporting plate is provided with a locking position matched with the limiting protrusion.

6. The nasal aspirator according to any one of claims 1 to 5, characterized in that: The solenoid valve comprises a first connection port, a second connection port and a third connection port of the solenoid valve, the positive pressure pump outlet is connected to the third connection port of the solenoid valve, the second connection port of the solenoid valve is connected to the second channel, and the first connection port of the solenoid valve is connected to the atmosphere.

7. The nasal aspirator according to claim 6, characterized in that: It also includes a control device for electrically connecting to the positive pressure pump and the solenoid valve respectively, so that when the solenoid valve is in a working state, the second connection port of the solenoid valve is connected to the third connection port of the solenoid valve, and when it is not in a working state, the second connection port of the solenoid valve is connected to the first connection port of the solenoid valve.

8. The nasal aspirator according to claim 7, characterized in that: The body shell includes a body front shell and a body rear cover that cooperate with each other, the rear cover is provided with a rear cover accommodating cavity, the solenoid valve and the positive pressure pump are arranged in the rear cover accommodating cavity, and the suction head bottom cover and the body front shell are integrally formed.

9. The nasal aspirator according to claim 8, characterized in that: It also includes a partition, the front shell of the body is provided with a front shell accommodating cavity, the control device includes a circuit board and a button, the circuit board is arranged in the front shell accommodating cavity, the partition is used to support and fix the solenoid valve and the positive pressure pump, and the button is arranged on the front shell of the body.

10. The nasal aspirator according to claim 9, characterized in that: The partition is provided with a first limit device and a second limit device, the first limit device cooperates with the solenoid valve, the second limit device cooperates with the positive pressure pump, the first limit device includes a limit frame, and the second limit device includes a limit opening.

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