A nasal aspirator and its nasal aspiration method

Abstract

This invention relates to the field of nasal aspirator technology, and more specifically, to a nasal aspirator and its method, comprising: a nasal plug suction head unit and a negative pressure suction unit. The nasal plug suction head unit includes: a suction head body, which has an suction port for inserting into the nasal cavity to aspirate nasal secretions and an exhaust port for connecting to the negative pressure suction unit. The nasal aspirator and its method of this invention adjust the suction force of the suction head body through the negative pressure suction unit, making it easier to control the speed or force of aspirating nasal secretions, reducing discomfort inside the nasal cavity. Compared to oral nasal aspirators, this invention provides better suction and reduces the risk of infection. The structural design of the nasal plug suction head unit in this invention effectively prevents the backflow of nasal secretions, preventing secondary infection caused by backflow, and reducing discomfort caused by irritation to the nasal cavity or throat.

Description

Technical Field

[0001] This invention relates to the field of nasal aspirator technology, and more specifically, to a nasal aspirator and a method for nasal aspiration. Background Technology

[0002] Nasal aspirators for infants are now very common, mainly used to clean the nasal passages of infants and young children. Infants' nasal passages are relatively narrow and produce a lot of secretions. If not cleaned immediately, impurities and dust in the air enter the nasal cavity during breathing, mix with the mucus, and dry to form nasal crusts. Dried mucus can then block the nasal passages, affecting the child's breathing. Therefore, timely cleaning of a baby's nose is especially important.

[0003] However, most nasal aspirators on the market are mouth-suction type, which rely on adults to use their mouths to suck out the baby's nasal mucus. This is very unhygienic and may increase the risk of infection during the mouth suction process. Furthermore, adults have limited lung capacity and cannot generate a more sustained and larger negative pressure value when using mouth suction. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a nasal aspirator and a nasal aspiration method thereof.

[0005] The technical solution adopted in this invention is:

[0006] A nasal aspirator includes: a nasal plug suction head unit and a negative pressure suction unit. The nasal plug suction head unit includes: a suction head body, which has an suction port for inserting into the nasal cavity to aspirate nasal secretions and an exhaust port for connecting to the negative pressure suction unit.

[0007] Optionally, the nasal cannula suction head unit also includes: a liquid reservoir, the suction head body being detachably connected to the liquid reservoir; the suction port is located at the end of the suction head body away from the liquid reservoir, and the exhaust port is located on the side of the suction head body.

[0008] Optionally, the nasal cannula suction head unit also includes: an anti-backflow cylindrical tube coaxially disposed within the suction head body, one end of which is connected to the suction port.

[0009] Optionally, the anti-backflow cylindrical tube is a variable diameter cylindrical tube structure with the diameter gradually decreasing from the end closer to the suction port to the end farther away from the suction port.

[0010] Optionally, the anti-backflow cylindrical tube has a first cylindrical channel and a second cylindrical channel that are connected inside. The first cylindrical channel is connected to the suction port. The first cylindrical channel is a variable diameter channel structure with the diameter gradually decreasing from the end near the suction port to the end away from the suction port. The diameter of the connection end between the first cylindrical channel and the second cylindrical channel is smaller than the diameter of the second cylindrical channel.

[0011] Optionally, the negative pressure suction unit includes: a conduit, one end of which is sealed to the exhaust port on the side of the suction head body, and the other end of which is sealed to the suction port of the pump housing; a pump cover is connected to the pump housing, and an installation chamber is formed between the pump cover and the pump housing; a pull rod is slidably connected to the middle part of the pump cover in the center hole, and there is a gap for ventilation between the pull rod and the center hole of the pump cover; one end of the pull rod that passes into the installation chamber is connected to the closed end of the multi-layer integrated piston, and the open end of the multi-layer integrated piston is sealed to the inner side of the pump cover; a negative pressure chamber is formed between the pump housing, the multi-layer integrated piston and the pump cover.

[0012] Optionally, the negative pressure suction unit further includes a first check valve, which is installed at the suction port of the pump casing to allow gas in the conduit to flow unidirectionally into the pump casing through the suction port.

[0013] Optionally, the negative pressure suction unit further includes: a second check valve, an exhaust channel is provided at one end of the pull rod connected to the multi-layer integrated piston, the second check valve is installed in the exhaust channel so that the gas in the negative pressure chamber flows unidirectionally into the exhaust channel, the exhaust channel is connected to an exhaust hole provided on the side wall of the pull rod so that the gas in the exhaust channel is discharged into the multi-layer integrated piston through the exhaust hole.

[0014] Optionally, the negative pressure suction unit further includes: a return spring sleeved on the pull rod, one end of the return spring abutting against the end plate at the connection between the pull rod and the multi-layer integrated piston, and the other end of the return spring abutting against the pump cover.

[0015] A nasal aspiration method, applied to the aforementioned nasal aspirator, includes the following steps: placing the aspirator head body into the nasal cavity, controlling the activation of the negative pressure suction unit, the negative pressure suction unit drawing air from the aspirator head body through the exhaust port into the negative pressure suction unit, creating a negative pressure within the aspirator head body, and drawing nasal secretions from the nasal cavity into the aspirator head body through the suction port of the aspirator head body.

[0016] As can be seen from the above solution, the beneficial effects of the present invention are as follows:

[0017] This invention discloses a nasal aspirator and its method, which adjusts the suction force of the aspirator head body through a negative pressure suction unit, making it easy to control the speed or force of suctioning nasal secretions and reducing discomfort inside the nasal cavity. Compared with oral aspirators, this invention has a better suction effect and can reduce the risk of infection. The structural design of the nasal plug aspirator head unit in this invention can effectively prevent the backflow of nasal secretions, prevent secondary infection caused by backflow, and reduce discomfort caused by irritation to the inside of the nasal cavity or throat.

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is an overall schematic diagram of the first direction provided in an embodiment of the present invention;

[0021] Figure 2 This is an overall schematic diagram of the second direction provided in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the nasal plug suction head unit provided in an embodiment of the present invention;

[0023] Figure 4 A cross-sectional view of the nasal plug suction head unit provided in an embodiment of the present invention;

[0024] Figure 5 A schematic diagram of the suction head body provided in an embodiment of the present invention. Figure 1 ;

[0025] Figure 6 This is a schematic diagram of the negative pressure suction unit provided in an embodiment of the present invention;

[0026] Figure 7 This is a partial cross-sectional view of the negative pressure suction unit provided in an embodiment of the present invention;

[0027] Figure 8 A partial schematic diagram of the negative pressure suction unit provided in an embodiment of the present invention. Figure 1 ;

[0028] Figure 9 A partial schematic diagram of the negative pressure suction unit provided in an embodiment of the present invention. Figure 2 ;

[0029] Figure 10 This is a schematic diagram of the structure of a multi-layered integrated piston provided in an embodiment of the present invention;

[0030] Figure 11 A schematic diagram of a pull rod provided in an embodiment of the present invention;

[0031] Figure 12 A schematic diagram of the suction head body provided in an embodiment of the present invention. Figure 2 ;

[0032] Figure 13 This is a cross-sectional view of the suction head body provided in an embodiment of the present invention;

[0033] Figure 14 A schematic diagram of a flow-limiting tube provided in an embodiment of the present invention;

[0034] Figure 15This is a cross-sectional view of the flow-limiting tube provided in an embodiment of the present invention.

[0035] Icons: Nasal plug suction head unit 100; Suction head body 101; Suction inlet 102; Exhaust outlet 103; Liquid reservoir 104; Anti-backflow cylindrical tube 105; First cylindrical channel 106; Second cylindrical channel 107; Annular airbag 108; Airbag tube 109; Air guide tube 110; Flow limiting tube 111; Rubber conical head 112; Conical plug 113; Column 114; Cracked groove 115; Negative pressure suction unit 200; Guide tube 201; Pump housing 202; Pump cover 203; Pull rod 204; Multi-layer integrated piston 205; First check valve 206; Second check valve 207; Exhaust channel 208; Exhaust hole 209. Detailed Implementation

[0036] To ensure a clear and complete description of the technical solutions in the embodiments of the present invention, which will be presented below with reference to the accompanying drawings, it is important to understand that the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0037] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0038] Please see Figure 1-15 The present invention provides a nasal aspirator, comprising: a nasal plug suction head unit 100 and a negative pressure suction unit 200. The nasal plug suction head unit 100 includes: a suction head body 101, which has an suction port 102 for inserting into the nasal cavity to aspirate nasal secretions and an exhaust port 103 for connecting to the negative pressure suction unit 200.

[0039] This invention discloses a nasal aspirator for removing secretions from the nasal cavity. In use, the suction head 101 is inserted into the nasal cavity, and then the negative pressure suction unit 200 is activated. The negative pressure suction unit 200 draws air from the suction head 101 through the exhaust port 103, creating a negative pressure within the suction head 101. This draws nasal secretions from the nasal cavity into the suction head 101 through the suction port 102. Compared to existing oral-suction nasal aspirators, this invention reduces the risk of infection and allows for adjustment of the suction force of the suction head 100 via the negative pressure suction unit 200, facilitating control of the speed and force of suctioning nasal secretions, reducing discomfort within the nasal cavity, and providing a better suction effect.

[0040] The nasal suction head unit 100 also includes: a reservoir 104, with the suction head body 101 detachably connected to the reservoir 104; an suction inlet 102 located at the end of the suction head body 101 away from the reservoir 104, and an exhaust port 103 located on the side of the suction head body 101. The suction head body 101 draws in nasal secretions through the suction inlet 102 and collects the secretions in the reservoir 104. The suction head body 101 and the reservoir 104 are preferably connected by a threaded seal for easy installation or disassembly, so as to better clean the nasal secretions in the reservoir 104. The end of the suction head body 101 that extends into the nasal cavity adopts a bullet-shaped structure design, which makes it easy to enter the nasal cavity and reduces discomfort to the nasal cavity. The suction inlet 102 of the suction head body 101 has rounded corners to prevent damage to the nasal cavity and to improve the suction effect.

[0041] The nasal suction head unit 100 further includes an anti-backflow cylindrical tube 105 coaxially disposed within the suction head body 101, one end of which is connected to the suction port 102. When the suction head body 101 suctions nasal secretions, the secretions sucked in through the suction port 102 enter the anti-backflow cylindrical tube 105 and fall into the secretion storage area formed between the suction head body 101 and the liquid reservoir 104. Since the present invention is generally cleaned after each use, the secretion storage area formed between the suction head body 101 and the liquid reservoir 104 does not store excessive secretions. Furthermore, the opening of the anti-backflow cylindrical tube 105 is relatively small. The probability of secretions flowing back to the inlet 102 through the anti-backflow cylindrical tube 105 is low. Since the inlet 102 is blocked by one end of the anti-backflow cylindrical tube 105, when the suction head body 101 is tilted, the probability of secretions entering the area between the suction head body 101 and the anti-backflow cylindrical tube 105 is relatively high, and the probability of backflow is relatively low. Therefore, by cooperating with the anti-backflow cylindrical tube 105 and the inlet 102, the backflow of nasal secretions can be effectively avoided, preventing backflow from causing secondary infection and reducing the discomfort caused by irritation to the nasal cavity or throat.

[0042] The anti-backflow cylindrical tube 105 is a variable-diameter cylindrical tube structure whose diameter gradually decreases from the end near the suction port 102 to the end away from the suction port 102. This structural design ensures that after suctioning of secretions stops, secretions are less likely to enter the anti-backflow cylindrical tube 105 at the outlet, thus reducing the probability of secretions flowing back to the suction port 102 through the anti-backflow cylindrical tube 105.

[0043] The anti-backflow cylindrical tube 105 has a first cylindrical channel 106 and a second cylindrical channel 107 that are connected inside. The first cylindrical channel 106 is connected to the suction port 102. The first cylindrical channel 106 is a variable diameter channel structure with the diameter gradually decreasing from the end near the suction port 102 to the end away from the suction port 102. The diameter of the connection end between the first cylindrical channel 106 and the second cylindrical channel 107 is smaller than the diameter of the second cylindrical channel 107.

[0044] In the anti-backflow cylindrical tube 105, the diameter of the first cylindrical channel 106 gradually decreases from the end near the suction port 102 to the end away from the suction port 102. This variable diameter design utilizes Bernoulli's principle in fluid dynamics, that is, when fluid passes through a gradually narrowing channel, the flow velocity increases while the static pressure decreases. The increased flow velocity helps secretions pass through the channel more quickly, reducing the possibility of stagnation and backflow. The diameter of the connection end between the first cylindrical channel 106 and the second cylindrical channel 107 is smaller than the diameter of the second cylindrical channel 107, further enhancing the fluid dynamics effect, causing the flow velocity of secretions to increase further when passing through the connection end, thereby more effectively preventing backflow. Through the variable diameter design of the first cylindrical channel 106, a pressure gradient is formed in the channel, with the pressure at the suction port 102 being relatively high and the pressure at the second cylindrical channel 107 being relatively low. This pressure difference helps push secretions toward the second cylindrical channel 107, further reducing the possibility of backflow; by optimizing the design of the fluid channel, irritation to the nasal cavity tissues is reduced, secretions are reduced from remaining in the channel, and the comfort of using the device is improved; because secretions pass through the channel more quickly, they are reduced from remaining in the channel, making it easier to clean after use and maintaining the hygiene and functionality of the device.

[0045] The negative pressure suction unit 200 includes: a conduit 201, one end of which is sealed to the exhaust port 103 on the side of the suction head body 101, and the other end of which is sealed to the suction port of the pump housing 202. A pump cover 203 is connected to the pump housing 202, and an installation chamber is formed between the pump cover 203 and the pump housing 202. The middle part of a pull rod 204 is slidably connected in the central hole of the pump cover 203. There is a gap for ventilation between the pull rod 204 and the central hole of the pump cover 203. One end of the pull rod 204, which passes into the installation chamber, is connected to the closed end of a multi-layer integrated piston 205. The open end of the multi-layer integrated piston 205 is sealed to the inner side of the pump cover 203. A negative pressure chamber is formed between the pump housing 202, the multi-layer integrated piston 205, and the pump cover 203.

[0046] The negative pressure suction unit 200 is used to control the suction head body 101 inserted into the nasal cavity for suction. During suction, the pull rod 204 is pulled away from the pump housing 202, causing the pull rod 204 to drive the multi-layer integrated piston 205 to compress, which increases the volume of the negative pressure chamber and reduces the internal pressure, thereby generating negative pressure. There is a gap between the pull rod 204 and the center hole of the pump cover 203 for ventilation, which facilitates the air between the multi-layer integrated piston 205 and the pump cover 203 to be forced to the outside. At this time, due to the negative pressure generated in the negative pressure chamber between the multi-layer integrated piston 205 and the pump housing 202, the air in the suction head body 101 is drawn into the negative pressure chamber through the conduit 201, so that the suction head body 101 and the liquid reservoir 104 are generated with negative pressure, thereby sucking the secretions in the nasal cavity through the suction port 102 of the suction head body 101. The structural design of the multi-layer integrated piston 205 can effectively squeeze out air and has multiple protections against vacuum leakage, ensuring the vacuum suction effect.

[0047] The negative pressure suction unit 200 further includes a first check valve 206, which is installed at the suction port of the pump housing 202 to allow gas in the conduit 201 to flow unidirectionally into the pump housing 202 through the suction port. The first check valve 206 ensures that gas in the conduit 201 can only flow unidirectionally into the pump housing 202, preventing backflow that could force secretions in the suction head body 101 and the reservoir 104 back into the nasal cavity.

[0048] The negative pressure suction unit 200 also includes: a second check valve 207, and an exhaust channel 208 provided at one end of the pull rod 204 connected to the multi-layer integrated piston 205. The second check valve 207 is installed in the exhaust channel 208 so that the gas in the negative pressure chamber flows unidirectionally into the exhaust channel 208. The exhaust channel 208 is connected to the exhaust hole 209 provided on the side wall of the pull rod 204 so that the gas in the exhaust channel 208 is discharged into the multi-layer integrated piston 205 through the exhaust hole 209.

[0049] When the pull rod 204 moves the multi-layer integrated piston 205 into the pump housing 202, the multi-layer integrated piston 205 unfolds inside the pump housing 202, reducing the volume of the negative pressure chamber and increasing the internal pressure. At this time, the second check valve 207 automatically opens, and the gas in the negative pressure chamber is discharged into the multi-layer integrated piston 205 through the exhaust channel 208 and the exhaust hole 209, facilitating subsequent discharge. The gas in the negative pressure chamber can only flow unidirectionally to the exhaust channel to prevent backflow and ensure that the exhaust path of the negative pressure chamber is unobstructed.

[0050] The above scheme has the following advantages:

[0051] 1. High-efficiency negative pressure control with adjustable negative pressure chamber volume: When the pull rod 204 drives the multi-layer integrated piston 205 to move into the pump housing 202, the multi-layer integrated piston 205 expands within the pump housing 202, reducing the volume of the negative pressure chamber. This design can quickly generate negative pressure, and by controlling the movement of the pull rod 204, the magnitude of the negative pressure can be precisely adjusted to meet different usage requirements; it can rapidly adjust the volume and internal pressure of the negative pressure chamber, achieving highly efficient negative pressure control.

[0052] 2. To prevent gas backflow, a second check valve 207 is installed inside the exhaust channel 208, ensuring that the gas in the negative pressure chamber can only flow unidirectionally to the exhaust channel. This effectively prevents gas backflow, ensures a smooth exhaust path in the negative pressure chamber, maintains the negative pressure effect of the system, and prevents gas backflow, thus ensuring stable pressure within the negative pressure chamber. This makes the suction process more stable and reliable. Furthermore, by controlling the movement of the pull rod 204, the user can intuitively adjust the negative pressure, making operation simple and convenient. In addition, the pump housing 202, pump cover 203, multi-layer integrated piston 205, and pull rod 204, etc., are also included. The modular design of the components makes the system structure compact, easy to assemble and maintain. In addition, the design of the exhaust channel 208 and exhaust port 209 makes the gas discharge path clear, reduces gas retention in the system, and ensures suction efficiency and equipment hygiene. The setting of the first check valve 206 and the second check valve 207 provides dual protection, ensuring that the gas can only flow in one direction, preventing backflow, and improving the reliability of the system. It not only improves the efficiency and comfort of equipment use, but also ensures the safety and hygiene of the equipment, making it suitable for various application scenarios that require negative pressure suction.

[0053] The negative pressure suction unit 200 also includes a return spring sleeved on the pull rod 204. One end of the return spring abuts against the end plate at the connection between the pull rod 204 and the multi-layer integrated piston 205, and the other end of the return spring abuts against the pump cover 203. The design of the return spring is such that after suction, when the pull rod 204 is released, the end plate at the connection between the multi-layer integrated piston 205 is reset under the elastic force of the return spring, thereby driving the multi-layer integrated piston 205 to unfold and reset.

[0054] The negative pressure suction unit 200 incorporates a return spring design, making its operation more convenient. Through the action of the return spring, when the pull rod 204 is released after suction, the end plate at the connection of the multi-layer integrated piston 205 automatically resets under the elastic force of the return spring, thereby driving the multi-layer integrated piston 205 to unfold and reset. This saves manpower, eliminating the need for manual reset by the user, making operation easier and more convenient. It ensures the equipment is quickly ready after each use, facilitating subsequent negative pressure suction and improving operational convenience and continuity. Furthermore, the return spring design ensures that the multi-layer integrated piston 205 returns to the same position each time, maintaining consistent volume and internal pressure within the negative pressure chamber before each use, ensuring the stability and reliability of each suction operation. In addition, the automatic reset function reduces user intervention during operation, lowering the risk of misoperation. Users simply pull the pull rod 204 for suction, and it automatically resets upon release. The operation is simple and intuitive, ensuring the equipment returns to a safe state after each use and reducing safety hazards caused by improper operation.

[0055] One end of the pull rod 204 extending outside the pump cover 203 is connected to a handle. The end of the pull rod 204 connected to the multi-layer integrated piston 205 is provided with two annular end plates. A snap-fit ​​groove is formed between the two annular end plates for snap-fitting the multi-layer integrated piston 205. The pull rod 204 passes through the central hole of the multi-layer integrated piston 205. The two annular end plates are respectively sealed and snap-fitted onto the inner and outer sides of the multi-layer integrated piston 205. The multi-layer integrated piston 205 and the pull rod 204 are fixed by a snap-fit ​​method. While ensuring stable fixation, the fixing structure can be effectively simplified and the assembly time can be reduced.

[0056] The multi-layer integrated piston 205 has multiple annular structures and is made of elastic material.

[0057] The outer surface of the suction head body 101 is provided with an annular groove, and an annular airbag 108 for expanding and pressing against the inner wall of the nasal cavity is bonded in the annular groove. An airbag tube 109 fixed to the inner side of the annular airbag 108 is sealed and passed through the tube hole on the side wall of the suction head body 101. One end of the airbag tube 109 inserted into the suction head body 101 is fixedly connected to one end of the air guide tube 110 through a right-angle bend. The other end of the air guide tube 110 is fixed to the side wall of the exhaust port 103 inserted into the suction head body 101. When the suction head body 101 is inserted into the nasal cavity, the above-mentioned structure is designed to further improve the negative pressure suction effect. Specifically, an annular airbag 108 for expanding and contacting the inner wall of the nasal cavity is bonded to the annular groove on the outer side of the suction head body 101. After the suction head body 101 is inserted into the preset position in the nasal cavity, the annular airbag 108 contacts the inner wall of the nasal cavity. When negative pressure suction is performed by the negative pressure suction unit 200, causing airflow to enter the pump housing 202 through the exhaust port 103, part of the airflow enters the air guide tube 110 through the connection between the exhaust port 103 and the air guide tube 110. Inside the 10, under continuous negative pressure, part of the airflow enters the annular airbag 108 through the right-angle bend and the airbag tube 109, causing the annular airbag 108 to expand and fit tightly against the inside of the nasal cavity, forming a relatively closed suction area. This is beneficial for improving the suction force and suction effect on nasal secretions. After suction is completed, the negative pressure suction is stopped, and the gas in the annular airbag 108 is slowly discharged through the airbag tube 109, the right-angle bend and the air guide tube 110. The annular airbag 108 releases its tight contact with the inner wall of the nasal cavity, making it easy to remove the suction head body 101.

[0058] The air duct 110 is also equipped with a flow restrictor 111. The end of the flow restrictor 111 near the right-angle bend is glued with a rubber cone head 112 without a cone tip. The upper end of the cone inner wall of the rubber cone head 112 is attached to the cone outer wall of the cone plug 113. The cone plug 113 is fixed in the flow restrictor 111 by the column 114. Multiple cleaving grooves 115 are evenly opened around the end of the rubber cone head 112 away from the flow restrictor 111. When the airflow in the suction head body 101 enters the rubber cone head 112 through the exhaust port 103, the air duct 110 and the flow restrictor 111, the pipe opening at the end of the rubber cone head 112 with multiple cleaving grooves 115 is opened, so that the rubber cone tube is separated from the cone outer wall of the cone plug 113, so that the airflow can enter the annular airbag 108 through the air duct 110, the right-angle bend and the airbag tube 109.

[0059] A flow-limiting tube 111 is also provided inside the air duct 110. A rubber conical head 112 without a cone tip is glued to one end of the flow-limiting tube 111 near the right-angle bend. Under normal conditions, the upper end of the conical inner wall of the rubber conical head 112 adheres to the conical outer wall of the conical plug 113 under its own elastic force, which can reduce the probability of nasal secretions flowing into the annular airbag 108 from the reservoir 104. During negative pressure suction, the impact of the airflow opens the opening at one end of the rubber conical head 112, which has multiple slots 115, allowing the rubber conical tube to connect with the conical plug. When the conical outer wall of the plug 113 separates, the airflow can enter the annular airbag 108 through the air guide tube 110, the right-angle bend tube and the airbag tube 109 to inflate the annular airbag 108, causing the annular airbag 108 to expand and fit against the inner wall of the nasal cavity. When negative pressure suction is paused or completed, the gas in the annular airbag 108 can slowly overflow to the outside through the multiple slots 115 of the rubber conical head 112 without affecting the gas discharge. The gas discharge speed is controlled to be less than the air intake speed, which is convenient for use when performing continuous negative pressure suction.

[0060] A nasal aspiration method, applied to the aforementioned nasal aspirator, includes the following steps: inserting the suction head body 101 into the nasal cavity; activating the negative pressure suction unit 200; the negative pressure suction unit 200 draws air from inside the suction head body 101 through the exhaust port 103 into the negative pressure suction unit 200, creating a negative pressure inside the suction head body 101; and drawing nasal secretions from the nasal cavity into the suction head body 101 through the suction port 102. This method is simple, practical, and easy to operate, effectively improving the suction effect on nasal secretions.

[0061] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0062] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0063] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. Other modifications can be easily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A nasal aspirator, characterized in that, include: The nasal plug suction head unit (100) and the negative pressure suction unit (200) are provided. The nasal plug suction head unit (100) includes: a suction head body (101), which is provided with a suction port (102) for inserting into the nasal cavity to suction nasal secretions and an exhaust port (103) for connecting to the negative pressure suction unit (200). The nasal plug suction head unit (100) also includes: an anti-backflow cylindrical tube (105) coaxially disposed in the suction head body (101), one end of the anti-backflow cylindrical tube (105) being connected to the suction port (102); An annular groove is provided on the outer side of the suction head body (101). An annular airbag (108) for expanding and pressing against the inner wall of the nasal cavity is bonded in the annular groove. An airbag tube (109) fixed to the inner side of the annular airbag (108) is sealed and inserted into the tube hole on the side wall of the suction head body (101). One end of the airbag tube (109) inserted into the suction head body (101) is fixedly connected to one end of the air guide tube (110) through a right-angle bend. The other end of the air guide tube (110) is fixed to the side wall of the exhaust port (103) inserted into the suction head body (101). The air duct (110) is also equipped with a flow restrictor (111). A rubber cone head (112) without a cone tip is glued to one end of the flow restrictor (111) near the right-angle bend. The upper end of the inner conical wall of the rubber cone head (112) is attached to the outer conical wall of a cone plug (113). The cone plug (113) is fixed inside the flow restrictor (111) by a column (114). Multiple slots are evenly distributed around the end of the rubber cone head (112) away from the flow restrictor (111). 115) When the airflow in the suction head body (101) enters the rubber conical head (112) through the exhaust port (103), the air guide tube (110) and the flow limiting tube (111), the tube opening at one end of the rubber conical head (112) with multiple cracks (115) is opened, so that the rubber conical tube is separated from the conical outer wall of the conical plug (113), so that the airflow can enter the annular airbag (108) through the air guide tube (110), the right angle bend and the airbag tube (109).

2. A nasal aspirator according to claim 1, characterized in that, The nasal plug suction head unit (100) also includes: a liquid reservoir (104), the suction head body (101) being detachably connected to the liquid reservoir (104); the suction port (102) is located at one end of the suction head body (101) away from the liquid reservoir (104), and the exhaust port (103) is located on the side of the suction head body (101).

3. A nasal aspirator according to claim 1, characterized in that, The anti-backflow cylindrical tube (105) is a variable diameter cylindrical tube structure with the diameter gradually decreasing from the end near the suction port (102) to the end away from the suction port (102).

4. A nasal aspirator according to claim 1, characterized in that, The anti-backflow cylindrical tube (105) has a first cylindrical channel (106) and a second cylindrical channel (107) that are connected inside. The first cylindrical channel (106) is connected to the suction port (102). The first cylindrical channel (106) is a variable diameter channel structure with the diameter gradually decreasing from the end near the suction port (102) to the end away from the suction port (102). The diameter of the connection end between the first cylindrical channel (106) and the second cylindrical channel (107) is smaller than the diameter of the second cylindrical channel (107).

5. A nasal aspirator according to claim 1, characterized in that, The negative pressure suction unit (200) includes: a conduit (201), one end of which is sealed to the exhaust port (103) on the side of the suction head body (101), and the other end of which is sealed to the suction port of the pump housing (202). A pump cover (203) is connected to the pump housing (202), and an installation chamber is formed between the pump cover (203) and the pump housing (202). The middle part of the pull rod (204) is slidably connected in the center hole of the pump cover (203), and there is a gap for ventilation between the pull rod (204) and the center hole of the pump cover (203). One end of the pull rod (204) that passes into the installation chamber is connected to the closed end of the multi-layer integrated piston (205), and the open end of the multi-layer integrated piston (205) is sealed to the inner side of the pump cover (203). A negative pressure chamber is formed between the pump housing (202), the multi-layer integrated piston (205), and the pump cover (203).

6. A nasal aspirator according to claim 5, characterized in that, The negative pressure suction unit (200) also includes a first check valve (206), which is installed at the suction port of the pump housing (202) so that the gas in the conduit (201) flows unidirectionally into the pump housing (202) through the suction port of the pump housing (202).

7. A nasal aspirator according to claim 5, characterized in that, The negative pressure suction unit (200) also includes: a second check valve (207), and an exhaust channel (208) is provided at one end of the pull rod (204) connected to the multi-layer integrated piston (205). The second check valve (207) is installed in the exhaust channel (208) so that the gas in the negative pressure chamber flows unidirectionally into the exhaust channel (208). The exhaust channel (208) is connected to the exhaust hole (209) provided on the side wall of the pull rod (204) so ​​that the gas in the exhaust channel (208) is discharged into the multi-layer integrated piston (205) through the exhaust hole (209).

8. A nasal aspirator according to claim 5, characterized in that, The negative pressure suction unit (200) also includes a return spring sleeved on the pull rod (204), one end of the return spring abutting against the end plate at the connection between the pull rod (204) and the multi-layer integrated piston (205), and the other end of the return spring abutting against the pump cover (203).

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