Nasal aspirator and nasal aspiration method thereof

Abstract

The invention relates to the technical field of nasal aspirators, in particular to a nasal aspirator and a nasal aspiration method thereof.The nasal aspirator comprises a nasal plug suction head unit and a negative pressure suction unit, the nasal plug suction head unit comprises a suction head body, and the suction head body is provided with a suction inlet used for being placed in the nasal cavity to suck nasal cavity secretions and an exhaust port used for being connected with the negative pressure suction unit. According to the nasal aspirator and the nasal aspiration method thereof, the suction force of the suction head body is adjusted through the negative pressure suction unit, the speed or force for sucking secretions in the nasal cavity is convenient to control, the discomfort in the nasal cavity is reduced, and compared with a mouth suction type nasal aspirator, the suction effect is better, and the infection risk can be reduced; by means of the structural design of the nasal plug suction head units, backflow of secretions in the nasal cavity can be effectively avoided, secondary infection caused by backflow is prevented, and discomfort caused by stimulation to the interior of the nasal cavity or the throat is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of nasal aspirators, and more particularly to a nasal aspirator and a nasal aspirator method thereof. Background Art

[0002] Nowadays, it is very common to use a baby nasal aspirator, which is mainly used to clean the nasal cavity of infants and young children. The nasal cavity of infants and young children is relatively narrow, and there are a lot of secretions. If it is not cleaned immediately, impurities and dust mixed in the air will enter the nasal cavity when breathing and mix with it, which will dry and form nasal crusts. When the nasal mucus dries, it will form nasal crusts that block the nasal cavity, thus affecting the child's breathing. Therefore, it is particularly important to clean the baby's nasal mucus in time.

[0003] However, most of the nasal suction devices currently on the market are mouth-suction type, which relies on adults to use their mouths to suck out the baby's snot, which is very unhygienic and is likely to increase the risk of infection during the mouth-suction process. The lung capacity of adults for oral suction is limited and cannot produce a more sustained and larger negative pressure value. Summary of the invention

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

[0005] The technical solution adopted by the present invention is:

[0006] A nasal aspirator comprises a nasal suction head unit and a negative pressure suction unit. The nasal suction head unit comprises a suction head body, which is provided with a suction port for being placed in the nasal cavity to suck nasal secretions and an exhaust port for connecting to the negative pressure suction unit.

[0007] Optionally, the nasal congestion nozzle unit further includes: a liquid storage tank, to which the nozzle body is detachably connected; the suction port is arranged at one end of the nozzle body away from the liquid storage tank, and the exhaust port is arranged on the side of the nozzle body.

[0008] Optionally, the nasal congestion nozzle unit further comprises: an anti-backflow cylindrical tube coaxially arranged in the nozzle body, one end of the anti-backflow cylindrical tube being connected to the suction port.

[0009] Optionally, the backflow prevention cylindrical tube is a variable diameter cylindrical tube structure whose diameter gradually decreases from an end close to the suction port to an end away from the suction port.

[0010] Optionally, a first cylindrical channel and a second cylindrical channel are connected to each other inside the anti-backflow cylindrical tube, the first cylindrical channel is connected to the suction port, the first cylindrical channel is a variable diameter channel structure whose diameter gradually decreases from one end close to the suction port to an end away from the suction port, and the diameter of the connecting 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 and connected to the exhaust port on the side of the suction head body, and the other end of the conduit is sealed and connected to the suction port of the pump housing, and a pump cover is connected to the pump housing, and an installation chamber is formed between the pump cover and the pump housing; the middle part of the pull rod is slidably connected in the center hole of the pump cover, 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 penetrates into the installation chamber and is connected to the closed end of the multi-layer connected piston, and the open end of the multi-layer connected piston is sealed and connected to the inner side of the pump cover; a negative pressure chamber is formed between the pump housing, the multi-layer connected piston and the pump cover.

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

[0013] Optionally, the negative pressure suction unit also includes: a second check valve, an exhaust channel is provided at one end of the pull rod connected to the multi-layer connected piston, and the second check valve is installed in the exhaust channel to allow the gas in the negative pressure chamber to flow unidirectionally into the exhaust channel, and the exhaust channel is connected to the exhaust hole arranged on the side wall of the pull rod to discharge the gas in the exhaust channel into the multi-layer connected 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 abuts against an end plate at the connection between the pull rod and the multi-layered piston, and the other end of the return spring abuts against the pump cover.

[0015] A nasal suction method is applied to the nasal suction device, the method comprising the following steps: placing a suction head body into the nasal cavity, controlling a negative pressure suction unit to start, the negative pressure suction unit sucking air in the suction head body into the negative pressure suction unit through an exhaust port, so that negative pressure is formed in the suction head body, and nasal secretions in the nasal cavity are sucked into the suction head body through the suction port of the suction head body.

[0016] It can be seen from the above scheme that the beneficial effects of the present invention are:

[0017] A nasal aspirator and a nasal aspirating method of the present invention adjust the suction force of the suction head body through a negative pressure suction unit, which is convenient for controlling the speed or strength of aspirating nasal secretions and reducing the discomfort inside the nasal cavity. Compared with an oral suction nasal aspirator, the present invention has a better suction effect and can reduce the risk of infection. The structural design of the nasal congestion suction head unit of the present invention can effectively avoid the backflow of nasal secretions, prevent secondary infection caused by the backflow, and reduce the discomfort caused by stimulation to the inside of the nasal cavity or the throat.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 An overall schematic diagram of a first direction provided by an embodiment of the present invention;

[0021] Figure 2 An overall schematic diagram of a second direction provided by an embodiment of the present invention;

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

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

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

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

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

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

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

[0029] Fig.10 A schematic diagram of the structure of a multi-layered piston provided in an embodiment of the present invention;

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

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

[0032] Fig.13 A cross-sectional view of a suction head body provided by an embodiment of the present invention;

[0033] Fig.14 A schematic diagram of a current limiting tube provided in an embodiment of the present invention;

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

[0035] Icons: nasal congestion suction head unit 100; suction head body 101; suction port 102; exhaust port 103; liquid storage tank 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; split groove 115; negative pressure suction unit 200; catheter 201; pump housing 202; pump cover 203; pull rod 204; multi-layered piston 205; first check valve 206; second check valve 207; exhaust channel 208; exhaust hole 209. DETAILED DESCRIPTION

[0036] In order to clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention, it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

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

[0038] See also Figure 1-15 The present invention provides a nasal aspirator, comprising: a nasal suction head unit 100 and a negative pressure suction unit 200. The nasal suction head unit 100 comprises: a suction head body 101, and the suction head body 101 is provided with a suction port 102 for being placed in the nasal cavity to suck nasal secretions and an exhaust port 103 for connecting the negative pressure suction unit 200.

[0039] A nasal aspirator of the present invention is used to absorb secretions in the nasal cavity. When in use, the suction head body 101 is placed in the nasal cavity, and then the negative pressure suction unit 200 is controlled to start. The negative pressure suction unit 200 draws the air in the suction head body 101 into the negative pressure suction unit 200 through the exhaust port 103, so that a negative pressure is formed in the suction head body 101, and the nasal secretions in the nasal cavity are sucked into the suction head body 101 through the suction port 102 of the suction head body 101. Compared with the oral suction nasal aspirator in the prior art, the present invention can adjust the suction force of the suction head body 100 through the negative pressure suction unit 200 while reducing the risk of infection, so as to facilitate the control of the speed or strength of suctioning nasal secretions, reduce the discomfort inside the nasal cavity, and achieve a better suction effect.

[0040] The nasal congestion nozzle unit 100 also includes: a liquid storage tank 104, and the nozzle body 101 is detachably connected to the liquid storage tank 104; the suction port 102 is arranged at one end of the nozzle body 101 away from the liquid storage tank 104, and the exhaust port 103 is arranged at the side of the nozzle body 101. The nozzle body 101 sucks the secretions in the nasal cavity through the suction port 102, and makes the secretions fall into the liquid storage tank 104 for collection. The nozzle body 101 and the liquid storage tank 104 are preferably connected in a threaded sealing connection, which is convenient for installation or disassembly, so as to better clean the nasal secretions in the liquid storage tank 104. The end of the nozzle body 101 extending into the nasal cavity adopts a bullet-shaped structural design, which is convenient for probing into the nasal cavity and can reduce the discomfort of the nasal cavity. The suction port 102 of the nozzle body 101 has rounded corners to prevent damage to the nasal cavity and improve the suction effect.

[0041] The nasal congestion nozzle unit 100 further includes: an anti-backflow cylindrical tube 105 coaxially arranged in the nozzle body 101, and one end of the anti-backflow cylindrical tube 105 is connected to the suction port 102. When the nozzle body 101 sucks nasal secretions, the secretions sucked through the suction port 102 enter the anti-backflow cylindrical tube 105, and fall into the secretion storage area formed between the nozzle body 101 and the liquid storage tank 104 through the anti-backflow cylindrical tube 105. After the nasal secretions fall into the secretion storage area, since the present invention is generally cleaned after use, the secretion storage area formed between the nozzle body 101 and the liquid storage tank 104 will not store too much secretions, and the opening of the anti-backflow cylindrical tube 105 is relatively small, so , the probability of secretions flowing back to the suction port 102 through the anti-backflow cylindrical tube 105 is low, and because the suction port 102 is blocked by one end of the anti-backflow cylindrical tube 105, when the nozzle body 101 is tilted, the probability of secretions entering the area between the nozzle body 101 and the anti-backflow cylindrical tube 105 is high, and the probability of backflow is low. Therefore, through the cooperation of the anti-backflow cylindrical tube 105 and the suction port 102, the backflow of nasal secretions can be effectively avoided, the secondary infection caused by the backflow can be prevented, and the discomfort caused by stimulation to the inside of the nasal cavity or the throat can be reduced.

[0042] The backflow prevention cylindrical tube 105 is a variable diameter cylindrical tube structure whose diameter gradually decreases from the end close to the suction port 102 to the end far from the suction port 102. The above structural design makes it difficult for secretions to enter the backflow prevention cylindrical tube 105 at the liquid outlet of the backflow prevention cylindrical tube 105 after the suction of secretions is stopped, thereby reducing the probability of secretions flowing back to the suction port 102 through the backflow prevention cylindrical tube 105.

[0043] A first cylindrical channel 106 and a second cylindrical channel 107 are provided inside the anti-backflow cylindrical tube 105. The first cylindrical channel 106 is connected to the suction port 102. The first cylindrical channel 106 is a variable diameter channel structure whose diameter gradually decreases from one end close to the suction port 102 to one end away from the suction port 102. The diameter of the connecting end of 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 close to the suction port 102 to the end away from the suction port 102. The variable diameter design here utilizes the Bernoulli principle in fluid dynamics, that is, when the fluid passes through a gradually narrowing channel, the flow rate will increase, while the static pressure will decrease. The increase in flow rate helps the secretions to pass through the channel more quickly, reducing the possibility of retention and reflux; the diameter of the connecting end of 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, so that the flow rate of the secretions is further increased when passing through the connecting 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, the pressure at the suction port 102 is relatively high, and the pressure at the second cylindrical channel 107 is relatively low. This pressure difference helps to push the secretions toward the second cylindrical channel 107, further reducing the possibility of backflow; by optimizing the design of the fluid channel, the irritation to the internal tissues of the nasal cavity is reduced, the retention of secretions in the channel is reduced, and the comfort of using the device is improved; because the secretions pass through the channel more quickly, the retention in the channel is reduced, which facilitates cleaning after use, thereby 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 and connected to the exhaust port 103 on the side of the suction head body 101, and the other end of the conduit 201 is sealed and connected to the suction port of the pump housing 202. The 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 penetrates into the installation chamber is connected to the closed end of the multi-layer connected piston 205, and the open end of the multi-layer connected piston 205 is sealed and connected to the inner side of the pump cover 203; a negative pressure chamber is formed between the pump housing 202, the multi-layer connected 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 in a direction away from the pump housing 202, so that the pull rod 204 drives the multi-layered piston 205 to be compressed, so that the volume of the negative pressure chamber increases and the internal pressure decreases, thereby generating negative pressure. There is a gap for ventilation between the pull rod 204 and the center hole of the pump cover 203, which facilitates the air between the multi-layered piston 205 and the pump cover 203 to be pressed out to the outside. At this time, due to the negative pressure generated in the negative pressure chamber between the multi-layered piston 205 and the pump housing 202, the air in the suction head body 101 is sucked into the negative pressure chamber through the catheter 201, so that negative pressure is generated in the suction head body 101 and the liquid storage tank 104, thereby sucking the secretions in the nasal cavity through the suction port 102 of the suction head body 101. Among them, the structural design of the multi-layered piston 205 can effectively squeeze out the air, and can also protect against vacuum leakage in multiple ways to ensure the vacuum suction effect.

[0047] The negative pressure suction unit 200 further includes: a first check valve 206, which is installed at the air inlet of the pump housing 202, so that the gas in the catheter 201 can flow unidirectionally to the inside of the pump housing 202 through the air inlet of the pump housing 202. The first check valve 206 is installed at the air inlet of the pump housing 202, so that the gas in the catheter 201 can only flow unidirectionally to the inside of the pump housing 202, preventing the secretions in the suction head body 101 and the liquid storage tank 104 from being pressed back into the nasal cavity due to gas reflux.

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

[0049] When the pull rod 204 drives the multi-layer connected piston 205 to move toward the inside of the pump housing 202, the multi-layer connected piston 205 expands in the pump housing 202, so that the volume of the negative pressure chamber decreases and the internal pressure increases. At this time, the second check valve 207 automatically opens, and the gas in the negative pressure chamber is discharged to the inside of the multi-layer connected piston 205 through the exhaust channel 208 and the exhaust hole 209, which is convenient for subsequent discharge; the gas in the negative pressure chamber can only flow to the exhaust channel in one direction to prevent gas backflow, thereby ensuring that the exhaust path of the negative pressure chamber is unobstructed.

[0050] The above scheme has the following advantages:

[0051] 1. Efficient negative pressure control, the volume of the negative pressure chamber is adjustable. When the pull rod 204 drives the multi-layered piston 205 to move inside the pump housing 202, the multi-layered piston 205 is deployed inside 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 negative pressure can be accurately adjusted to meet different usage requirements; the volume and internal pressure of the negative pressure chamber can be quickly adjusted to achieve efficient negative pressure control.

[0052] 2. To prevent gas backflow, the second check valve 207 is installed in the exhaust channel 208, so that the gas in the negative pressure chamber can only flow to the exhaust channel in one direction, effectively preventing the backflow of gas, ensuring that the exhaust path of the negative pressure chamber is unobstructed, maintaining the negative pressure effect of the system, preventing gas backflow and ensuring the pressure stability in the negative pressure chamber, making the suction process more stable and reliable, and by controlling the movement of the pull rod 204, the user can intuitively adjust the negative pressure size, the operation is simple and convenient, in addition, the pump housing 202, the pump cover 203, the multi-layered piston 205 and the pull rod 204 and other parts The modular design of the components makes the system compact and easy to assemble and maintain. In addition, the design of the exhaust channel 208 and the exhaust hole 209 makes the gas exhaust path clear, reduces the retention of gas in the system, and ensures the suction efficiency and hygiene of the equipment; the setting of the first check valve 206 and the second check valve 207 provides double protection, ensuring that the gas can only flow in one direction and preventing backflow, thereby improving the reliability of the system, which not only improves the efficiency and comfort of the equipment, but also ensures the safety and hygiene of the equipment, and is suitable for various application scenarios requiring negative pressure suction.

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

[0054] The negative pressure suction unit 200 is designed with a reset spring, which makes the operation of the negative pressure suction unit 200 more convenient. Through the action of the reset spring, when the pull rod 204 is released after suction, the end plate at the connection of the multi-layer connected piston 205 will automatically reset under the elastic force of the reset spring, thereby driving the multi-layer connected piston 205 to expand and reset, saving manpower. The user does not need to manually reset, the operation is easier, and the operation convenience is improved, so that the device can be quickly ready after each use, which is convenient for negative pressure suction again, and the convenience and continuity of operation are improved; and the design of the reset spring ensures that the multi-layer connected piston 205 can return to the same position each time, so that the volume and internal pressure of the negative pressure chamber are consistent before each use, ensuring the stability and reliability of each suction operation; in addition, the automatic reset function reduces the user's intervention during the operation and reduces the risk of misoperation. The user only needs to simply pull the pull rod 204 to suction, and it will automatically reset after releasing it. The operation is simple and intuitive, ensuring that the device can be restored to a safe state after each use, reducing the safety hazards caused by improper operation.

[0055] One end of the pull rod 204 extending to the outside of the pump cover 203 is connected to the handle, and the end of the pull rod 204 connected to the multi-layered piston 205 is provided with two annular end plates, and a clamping groove for clamping and matching the multi-layered piston 205 is formed between the two annular end plates. The pull rod 204 passes through the center hole of the multi-layered piston 205, and the two annular end plates are sealed and clamped on the inner and outer side surfaces of the multi-layered piston 205 respectively. The multi-layered piston 205 and the pull rod 204 are fixed by a snap-on type, which can effectively simplify the fixing structure and shorten the assembly time while ensuring stable fixation.

[0056] The multi-layered piston 205 is provided with a plurality of ring layer structures, and the multi-layered piston 205 is made of elastic material.

[0057] An annular groove is provided on the outer side surface of the suction head body 101, and an annular airbag 108 for expanding and contacting the inner wall of the nasal cavity is bonded in the annular groove. An airbag tube 109 fixedly connected to the inner side of the annular airbag 108 is sealed and penetrated into the tube hole of 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 elbow, and the other end of the air guide tube 110 is fixed to the side wall of the exhaust port 103 at one end inserted into the suction head body 101. When the suction head body 101 is inserted into the nasal cavity, in order to further improve the negative pressure suction effect, the above structure is specially designed, that is, 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 of 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 so that the airflow enters the pump housing 202 through the exhaust port 103, part of the airflow enters the airway tube 110 through the connection port between the exhaust port 103 and the airway tube 110. 10, and under the state of continuous negative pressure, part of the airflow enters into the annular airbag 108 through the right-angle bend tube and the airbag tube 109, so that the annular airbag 108 expands, thereby closely fitting inside the nasal cavity, forming a relatively closed suction area, which is beneficial to improving the suction force and suction effect of the secretions in the nasal cavity. After the 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 tube and the air guide tube 110, and the annular airbag 108 releases the close resistance to the inner wall of the nasal cavity, which is convenient for removing the suction head body 101.

[0058] A flow limiting tube 111 is also provided in the air guide tube 110. A rubber conical head 112 without a cone tip is glued to one end of the flow limiting tube 111 close to the right-angle elbow. The upper end of the conical inner wall of the rubber conical head 112 fits on the conical outer wall of the conical plug 113. The conical plug 113 is fixed in the flow limiting tube 111 through a column 114; a plurality of split grooves 115 are evenly arranged around one end of the rubber conical head 112 away from the flow limiting tube 111, so that 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 the plurality of split grooves 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 passes through the air guide tube 110, the right-angle elbow and the airbag tube 109 and enters the annular airbag 108.

[0059] A flow limiting tube 111 is also provided in the air guide tube 110. A rubber conical head 112 without a conical tip is glued to one end of the flow limiting tube 111 near the right-angle elbow. Under normal conditions, the upper end of the conical inner wall of the rubber conical head 112 fits on the conical outer wall of the conical plug 113 under its own elastic force, which can reduce the probability of nasal secretions in the liquid storage tank 104 flowing into the annular airbag 108. During negative pressure suction, the pipe opening at one end of the rubber conical head 112 with multiple split grooves 115 is opened under the impact of the airflow, so that the rubber conical tube and the conical plug are in contact with each other. The conical outer wall of the rubber conical head 113 is separated. At this time, 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, so that the annular airbag 108 expands and fits the inner wall of the nasal cavity. When the negative pressure suction is paused or completed, the gas in the annular airbag 108 can slowly overflow to the outside through the multiple split grooves 115 of the rubber conical head 112, which will not affect the discharge of the gas, and the gas discharge speed is controlled to be lower than the air intake speed, which is convenient for continuous negative pressure suction.

[0060] A nasal suction method is applied to the above-mentioned nasal suction device, and the method comprises the following steps: placing the suction head body 101 into the nasal cavity, controlling the negative pressure suction unit 200 to start, and the negative pressure suction unit 200 sucks the air in the suction head body 101 into the negative pressure suction unit 200 through the exhaust port 103, so that negative pressure is formed in the suction head body 101, and the nasal secretions in the nasal cavity are sucked into the suction head body 101 through the suction port 102 of the suction head body 101. The above method is simple and practical, easy to operate, and can effectively improve the suction effect of the secretions in the nasal cavity.

[0061] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0062] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A nasal aspirator, characterized in that: include: A nasal congestion suction head unit (100) and a negative pressure suction unit (200), wherein the nasal congestion suction head unit (100) comprises a suction head body (101), the suction head body (101) being provided with a suction port (102) for being placed in the nasal cavity to suck nasal secretions and an exhaust port (103) for being connected to the negative pressure suction unit (200).

2. A nasal aspirator according to claim 1, characterized in that: The nasal congestion nozzle unit (100) further comprises: a liquid storage tank (104), to which the nozzle body (101) is detachably connected; the suction port (102) is arranged at one end of the nozzle body (101) away from the liquid storage tank (104), and the exhaust port (103) is arranged on the side of the nozzle body (101).

3. A nasal aspirator according to claim 1, characterized in that: The nasal congestion nozzle unit (100) further comprises: an anti-backflow cylindrical tube (105) coaxially arranged in the nozzle body (101), and one end of the anti-backflow cylindrical tube (105) is connected to the suction port (102).

4. A nasal aspirator according to claim 3, characterized in that: The backflow prevention cylindrical tube (105) is a variable diameter cylindrical tube structure whose diameter gradually decreases from an end close to the suction port (102) to an end away from the suction port (102).

5. A nasal aspirator according to claim 3, characterized in that: A first cylindrical channel (106) and a second cylindrical channel (107) are provided inside the anti-backflow cylindrical tube (105), the first cylindrical channel (106) is connected to the suction port (102), the first cylindrical channel (106) is a variable diameter channel structure whose diameter gradually decreases from an end close to the suction port (102) to an end away from the suction port (102), and the diameter of the connecting end of the first cylindrical channel (106) and the second cylindrical channel (107) is smaller than the diameter of the second cylindrical channel (107).

6. A nasal aspirator according to claim 1, characterized in that: The negative pressure suction unit (200) comprises: a conduit (201), one end of which is sealed and connected to the exhaust port (103) on the side of the suction head body (101), and the other end of which is sealed and connected 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 center hole of the pump cover (203), and a gap for ventilation is provided between the pull rod (204) and the center hole of the pump cover (203); one end of the pull rod (204) that penetrates into the installation chamber is connected to the closed end of a multi-layered connected piston (205), and the open end of the multi-layered connected piston (205) is sealed and connected to the inner side of the pump cover (203); a negative pressure chamber is formed between the pump housing (202), the multi-layered connected piston (205) and the pump cover (203).

7. A nasal aspirator according to claim 6, characterized in that: The negative pressure suction unit (200) further comprises: a first check valve (206), which is installed at the air intake port of the pump housing (202) so as to allow the gas in the conduit (201) to flow unidirectionally into the interior of the pump housing (202) through the air intake port of the pump housing (202).

8. A nasal aspirator according to claim 6, characterized in that: The negative pressure suction unit (200) also includes: a second check valve (207); an exhaust channel (208) is provided at one end of the pull rod (204) connected to the multi-layer connected piston (205); the second check valve (207) is installed in the exhaust channel (208) to allow the gas in the negative pressure chamber to flow 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) to discharge the gas in the exhaust channel (208) into the multi-layer connected piston (205) through the exhaust hole (209).

9. A nasal aspirator according to claim 6, 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 abuttingly fitting on the end plate at the connection between the pull rod (204) and the multi-layered piston (205), and the other end of the return spring abuttingly fitting on the pump cover (203).

10. A nasal suction method, applied to a nasal suction device according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: placing a suction head body (101) into the nasal cavity, controlling the negative pressure suction unit (200) to start, and the negative pressure suction unit (200) sucking the air in the suction head body (101) into the negative pressure suction unit (200) through an exhaust port (103), so that negative pressure is formed in the suction head body (101), and nasal secretions in the nasal cavity are sucked into the suction head body (101) through the suction port (102) of the suction head body (101).

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