An adjustable flow sterile visualized nasal irrigator

Abstract

The application discloses a flow-adjustable sterile visualized nasal washing device and belongs to the field of nasal washing devices. The device comprises an outer hard PP square shell, a sterile inner container is arranged in the outer hard PP square shell, an assembly gap is arranged between the outer hard PP square shell and the sterile inner container, a vertically extending transparent observation window is arranged on the front face of the outer hard PP square shell, outwardly extending side connecting sleeves are arranged on the lower sides of the sterile inner container, and PTFE hydrophobic microporous filter membranes are fixed in the side connecting sleeves. The double-layer detachable shell structure composed of the outer hard PP square shell and the inner sterile container is arranged, the air inlet structure with the PTFE hydrophobic microporous filter membranes on the two sides of the inner container is matched, the structural limitation of the single air inlet of the existing nasal washing device is broken, the single-side air inlet can be opened at will according to the holding posture during use, the smooth air inlet can be ensured without deliberately adjusting the angle of the nasal washing device, and the operation requirements of different use scenarios are met.

Description

Technical Field

[0001] This invention belongs to the field of nasal irrigator technology, specifically relating to an adjustable flow sterile visual nasal irrigator. Background Technology

[0002] Nasal irrigation is a core method for the clinical adjunctive treatment of nasal and sinus diseases and for daily nasal health care. Nasal irrigators, as specialized instruments for nasal irrigation, are widely used in clinical settings such as allergic rhinitis, acute and chronic sinusitis, and post-nasal surgery care, as well as in home healthcare settings such as daily nasal cleaning and protection against smog. With the continuous increase in public demand for nasal health care, the market has placed higher demands on the aseptic safety, ease of operation, controllable flow rate, and reliability of nasal irrigators.

[0003] Existing nasal irrigator products still have many technical shortcomings in terms of structural design and performance that urgently need to be addressed; Firstly, most existing nasal irrigators adopt a single-layer integrated liquid storage shell structure with a simple air intake design, generally featuring only a single air inlet. During the rinsing operation, users need to frequently adjust the grip and placement posture of the nasal irrigator to ensure that the air inlet is connected to the atmosphere and that air intake is smooth. This can easily lead to problems such as poor air intake and water flow interruption due to improper posture adjustment, resulting in poor ease of operation and an inability to adapt to the flexible operation needs of different usage scenarios.

[0004] Secondly, the air inlet sealing structure of existing nasal irrigators is poorly designed, often using simple rubber plugs or flip-top sealing structures. The sealing performance is insufficient, and when the product is not in use, external dust and microorganisms can easily enter the liquid storage chamber through the air inlet, causing contamination of the liquid storage chamber and failing to meet the sterile requirements for nasal care. At the same time, the leakage prevention performance of the sealing structure is insufficient. When the product is carried, inverted, or shaken, the rinsing fluid in the liquid storage chamber is very likely to leak through the air inlet, which not only wastes the liquid but also easily contaminates surrounding items, resulting in poor reliability.

[0005] Third, the existing nasal irrigator's flow regulation structure and pipeline layout design have obvious defects. The flow regulation switch mostly adopts a vertical arrangement structure, which has poor compatibility with the liquid outlet channel. During the adjustment process, problems such as switch jamming and pipeline clamping and seizing are prone to occur, making it impossible to achieve linear and continuous flow regulation. At the same time, the infusion pipeline in the liquid storage chamber mostly adopts a right-angle bend design at the turning point without a dedicated guide and limit structure. During use, the pipeline is very prone to bending and flattening, causing water flow blockage and rinsing interruption, which seriously affects the continuity and stability of the rinsing operation.

[0006] Fourth, existing nasal irrigators generally lack a precise and intuitive liquid level observation structure. Most products only have simple scale markings printed on the surface of the shell, without a dedicated transparent observation window. Affected by factors such as the light transmittance of the shell material, the properties of the irrigating solution, and the ambient light, users cannot accurately grasp the amount and remaining amount of irrigating solution in real time. This easily leads to problems such as insufficient irrigating solution causing irrigation interruption, or excessive preparation causing irrigating solution waste, making it impossible to achieve precise control of the irrigating dosage.

[0007] Fifth, in order to solve the leakage problem, some existing nasal irrigators have added a complex check valve structure at the air inlet or liquid outlet. This not only significantly increases the number of parts and manufacturing costs, and increases the difficulty of product assembly, but also makes it very easy for the valve to fail due to the check valve core getting stuck or the seal aging. In turn, it reduces the product's leak-proof performance and service life, and cannot meet the needs of large-scale mass production and long-term stable use. Summary of the Invention

[0008] The purpose of this invention is to provide an adjustable flow sterile visual nasal irrigator to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution: an adjustable flow sterile visual nasal irrigator, comprising an outer rigid PP square shell, an inner sterile liner assembled inside the outer rigid PP square shell, an assembly gap between the outer rigid PP square shell and the sterile inner liner, a vertically extending transparent observation window on the front of the outer rigid PP square shell, and outwardly extending side sleeves on the lower sides of the sterile inner liner, each side sleeve having a fixed PTFE hydrophobic microporous filter membrane inside, and openings corresponding to the positions of the side sleeves on the outer rigid PP square shell, with the ends of the side sleeves passing through the openings; a sealing plug assembly corresponding to the positions of the side sleeves on the outer side of the outer rigid PP square shell, the sealing plug assembly comprising a locking buckle, a central post, and a sealing ring, the central post being integrally formed inside the locking buckle. The central column has a sealing ring fitted around its outer periphery. A filter membrane contact plate is fixedly connected to the end of the central column facing the PTFE hydrophobic microporous filter membrane. A gradient flat guide nozzle is located at the bottom of the sterile inner liner, with its outlet direction horizontally forward. A horizontally arranged sliding flow regulating switch assembly is located at the bottom front of the outer rigid PP square shell. A flexible tube is located inside the sterile inner liner. One end of the tube extends through an arc-shaped guide channel to the bottom of the sterile inner liner and has an infusion tube inlet. The other end of the tube passes through the gradient flat guide nozzle and the sliding flow regulating switch assembly and extends out of the outer rigid PP square shell. A detachable nasal spray nozzle is threaded to the end of the tube. A tube clamping groove for securing the tube is located on the outside of the outer rigid PP square shell.

[0010] In a preferred embodiment, the outer rigid PP square shell has a top cover, and the inner side of the top cover has a top cover positioning groove. The top of the sterile inner liner has an inner liner injection port, and the top cover positioning groove is adapted to the inner liner injection port. The top of the top cover is rotatably connected to a flip-up hanging ring, which can fit against the top surface of the top cover. The top edge of the sterile inner liner has an inner liner assembly positioning boss, and the top of the inner wall of the outer rigid PP square shell has an inner liner assembly limiting groove, which engages with the inner liner assembly positioning boss.

[0011] In a preferred embodiment, the inner wall of the side sleeve is provided with a sealing and locking protrusion, and the outer side of the sealing ring is provided with a locking and sealing groove, wherein the sealing and locking protrusion and the locking and sealing groove are adapted to engage.

[0012] In a preferred embodiment, the locking buckle has an auxiliary force-applying groove on its outer side, the diameter of the central post is adapted to the opening diameter of the outer rigid PP square shell, the length of the central post matches the extension length of the side sleeve, and the filter membrane contact plate has a circular planar structure.

[0013] In a preferred embodiment, the gradient flat guide nozzle is integrally injection molded with the sterile inner liner. The upper part of the gradient flat guide nozzle is a circular channel, and the lower part is a flat channel. The hose passes through the gradient flat guide nozzle and gradually extends from vertical to horizontal.

[0014] In a preferred embodiment, the outer rigid PP square shell has an inclined mounting groove at the bottom front, an adjusting groove is provided inside the inclined mounting groove, and a slider limiting guide groove is provided on the inner wall of the outer rigid PP square shell. The sliding flow regulating switch assembly is assembled in the adjusting groove.

[0015] In a preferred embodiment, the sliding flow regulating switch assembly includes a flow regulating pressure block and an adjusting wedge block. The flow regulating pressure block is slidably connected inside the slider limiting guide groove, and the adjusting wedge block is fixedly connected to the side of the flow regulating pressure block facing the adjusting groove.

[0016] In a preferred embodiment, the transparent observation window is embedded in the outer rigid PP square shell, and a silicone sealing ring is provided at the assembly point. The outer side of the transparent observation window is integrally formed with a liquid level scale of 0-500mL.

[0017] In a preferred embodiment, the radius of the arc-shaped guide channel is 5-8 mm, the flexible tube is arranged to fit the inner wall of the arc-shaped guide channel, and the infusion tube inlet end has a conical opening structure with the opening facing the bottom of the sterile inner liner.

[0018] In a preferred embodiment, the outlet end of the hose is provided with a threaded connection, and the inlet end of the detachable nasal spray head is provided with a threaded interface that is compatible with the threaded connection.

[0019] Compared with the prior art, the beneficial effects of the present invention are: This adjustable flow sterile visual nasal irrigator features a double-layer detachable shell structure consisting of an outer rigid PP square shell and an inner sterile liner. Combined with the air intake structure with PTFE hydrophobic microporous filter membranes on both sides of the inner liner, it breaks the structural limitation of existing nasal irrigators with a single air inlet. During use, the air inlet on one side can be opened at will according to the holding posture, ensuring smooth air intake without deliberately adjusting the angle of the nasal irrigator, thus adapting to the operational needs of different usage scenarios.

[0020] This adjustable flow sterile visual nasal irrigator features a sealing plug assembly with a double-sealing structure of snap-on positioning and silicone ring compression, combined with a heat-fused PTFE hydrophobic microporous filter membrane. This eliminates the need for an additional check valve structure, achieving a reliable leak-proof seal. When snapped shut, it completely blocks external dust and microorganisms from entering the inner liner, preventing contamination of the cavity during storage. It also eliminates liquid leakage during inversion, shaking, and handling, enhancing the safety of product storage and transport.

[0021] This adjustable flow sterile visual nasal irrigator features a horizontally arranged sliding flow adjustment switch assembly, combined with a gradient flat guide nozzle at the bottom of the inner tank and an arc-shaped guide channel on the inner wall of the shell, achieving stable delivery and linear adjustment of the nasal irrigation water flow. The horizontally arranged switch structure has a higher compatibility with the liquid outlet channel, and the adjustment process is smooth and without jamming. Stepless flow adjustment can be achieved by changing the cross-sectional area of ​​the pipeline. The arc-shaped guide channel can prevent the infusion tube from bending or flattening, and the gradient flat guide nozzle can reduce water flow resistance, ensuring a stable and uninterrupted water flow throughout the process and improving the continuity of the rinsing operation. The end of the hose extending out of the shell is directly threaded to the detachable nasal irrigation nozzle, reducing intermediate connecting parts between the hose and the nozzle, making it easy to disassemble and replace the nozzle. After use, the hose can be locked into the hose slot on the outside of the shell to reduce hose scattering.

[0022] This adjustable flow sterile visual nasal irrigator features a vertically extending transparent observation window on the front of the outer shell, along with an integrated 0-500mL liquid level scale on the outside of the window. This allows users to observe the amount of nasal irrigation solution used and remaining in the inner tank in real time during the rinsing process. Users can accurately control the dosage of nasal irrigation saline without interrupting the operation, effectively avoiding rinsing interruptions caused by insufficient rinsing solution or liquid waste caused by excessive rinsing solution. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the bottom of the outer casing, the hose, and the hose slot of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram illustrating the fit between the outer shell and the sterile inner liner of the present invention. Figure 4 This is a schematic diagram of the assembly structure of the outer shell and the sterile inner liner of the present invention; Figure 5 for Figure 4 Enlarged view of point A in the middle; Figure 6 This is a schematic diagram of the structure of the sliding flow regulating switch assembly of the present invention; Figure 7 This is a schematic diagram showing the combination of the hose, the gradually flattened guide nozzle, and the sliding flow regulating switch assembly of the present invention.

[0024] In the diagram: 1. Outer rigid PP square shell; 101. Transparent observation window; 102. Inner liner assembly limiting groove; 103. Side connecting sleeve; 1031. Sealing locking protrusion; 104. Locking buckle; 105. Auxiliary force application outer groove; 106. Sealing ring; 1061. Locking sealing groove; 107. Central column; 108. Filter membrane contact plate; 109. Slider limiting guide groove; 1010. Flow regulating pressure block; 101 1. Adjustable wedge block; 2. Outer shell cover; 201. Cover positioning slot; 202. Flip hanging ring; 3. Sterile inner liner; 301. Inner liner injection port; 302. Inner liner assembly positioning boss; 303. PTFE hydrophobic microporous filter membrane; 304. Installation tilting slide; 305. Adjustment slide; 306. Gradient flat guide nozzle; 307. Infusion tube inlet end; 308. Tube; 309. Tube slot. Detailed Implementation

[0025] The present invention will be further described below with reference to embodiments.

[0026] The following embodiments are used to illustrate the present invention, but should not be used to limit the scope of protection of the present invention. The conditions in the embodiments can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0027] Please see Figures 1-7This invention provides an adjustable flow sterile visual nasal irrigator, comprising an outer rigid PP square shell 1, a sterile inner liner 3 assembled inside the outer rigid PP square shell 1, an assembly gap between the outer rigid PP square shell 1 and the sterile inner liner 3, a vertically extending transparent observation window 101 on the front of the outer rigid PP square shell 1, and side fittings 103 respectively on the lower parts of both sides of the sterile inner liner 3. Each side fitting 103 has a PTFE hydrophobic microporous filter membrane 303 fixed inside. The outer shell 1 is provided with sealing plug assemblies corresponding to the positions of the side sleeves 103 on the outside. The sterile inner liner 3 is provided with a gradient flat guide nozzle 306 at the bottom. The outer rigid PP square shell 1 is provided with a sliding flow regulating switch assembly at the bottom front. The hose 308 passes through the sliding flow regulating switch assembly and extends out of the outer rigid PP square shell 1. The outlet end of the hose 308 is threaded with a detachable nasal spray head. The outer rigid PP square shell 1 is provided with a hose clamping groove 309 for clamping the hose 308 on the outside.

[0028] During assembly, the sterile inner liner 3 is vertically inserted into the shell through the top opening of the outer rigid PP square shell 1, so that the inner liner assembly positioning boss 302 on the top edge of the sterile inner liner 3 is precisely engaged in the inner liner assembly limiting groove 102 on the top of the inner wall of the shell, completing the radial and axial bidirectional positioning of the sterile inner liner 3 and the shell. After assembly, a reserved assembly gap is formed between the inner wall of the shell and the outer wall of the sterile inner liner 3. During disassembly, first remove the top cover 2 of the shell, and then directly lift the sterile inner liner 3 upwards to disengage the inner liner assembly positioning boss 302 from the inner liner assembly limiting groove 102, so that the sterile inner liner 3 can be removed separately from the shell.

[0029] Please see Figures 1-7 The outer rigid PP square shell 1 has an arc-shaped guide channel on its inner wall. The sterile inner liner 3 has a hose 308 inside. One end of the hose 308 extends through the arc-shaped guide channel to the bottom of the sterile inner liner 3 and is provided with an infusion tube inlet 307. The other end of the hose 308 passes through the gradient flat guide nozzle 306 and the sliding flow regulating switch assembly in sequence and then extends out of the outer rigid PP square shell 1. The outlet end of the hose 308 is provided with a threaded connection part to connect to a detachable nasal spray head. The outer rigid PP square shell 1 has a hose retainer 309 on its outer side, which can retain and position the hose 308 extending out of the shell. The outer rigid PP square shell 1 has a top cover 2. The top cover positioning groove 201 on the inner side of the top cover 2 is adapted to the inner liner injection port 301 on the top of the sterile inner liner 3. The top of the top cover 2 is rotatably connected to a flip hanging ring 202. The inner liner assembly positioning boss 302 on the top edge of the sterile inner liner 3 engages with the inner liner assembly limiting groove 102 on the top of the inner wall of the outer rigid PP square shell 1. The inner wall of the side sleeve 103 is provided with a sealing locking protrusion 1031, and the outer side of the sealing ring 106 is provided with a locking sealing groove 1061 adapted to the sealing locking protrusion 1031.

[0030] The locking buckle 104 has an auxiliary force-applying groove 105 on its outer side, and the central column 107 has a filter membrane contact plate 108 at its end. The outer rigid PP square shell 1 has an installation tilting slide 304 and an adjustment slide 305 on its front bottom, and the sliding flow regulating switch assembly is assembled in the adjustment slide 305.

[0031] When the product is idle, stored, or carried, the sealing plug assembly is fastened to the opening of the corresponding side sleeve 103 of the outer shell. The elastic buckle on the edge of the locking buckle 104 engages with the corresponding buckle groove on the outer shell to complete the mechanical locking and fixation. The central column 107 is precisely inserted into the opening of the outer shell, and the filter membrane contact plate 108 at its end is flat and fits against the central area of ​​the PTFE hydrophobic microporous filter membrane 303. At the same time, the annular silicone sealing ring 106, which is sleeved on the outer periphery of the central column 107, undergoes elastic deformation under compression, and the side sleeve 103... The sealing and locking protrusion 1031 of the wall is precisely engaged in the locking and sealing groove 1061 on the outside of the sealing ring 106, forming a multiple seal. When using the nasal irrigation device, the user applies an outward pulling force through the auxiliary force-applying groove 105 on the outside of the locking buckle 104 to unlock the elastic buckle, remove the sealing plug assembly on either side, and keep the other side in a locked and sealed state. Outside air enters the sterile inner liner 3 after being filtered by the PTFE hydrophobic microporous filter membrane 303 on the open side, so that the air pressure inside the inner liner is kept in balance with the outside atmospheric pressure in real time.

[0032] Please see Figure 6 The sliding flow regulating switch assembly includes a flow regulating block 1010 and an adjusting wedge 1011. The flow regulating block 1010 is slidably connected inside the slider limiting guide groove 109, and the adjusting wedge 1011 is fixedly connected to the side of the flow regulating block 1010 facing the adjusting slide groove 305. The hose 308 passes between the adjusting wedge 1011 and the adjusting slide groove 305. The transparent observation window 101 is embedded in the outer rigid PP square shell 1, and a silicone sealing ring is provided at the assembly point. The outer side of the transparent observation window 101 has an integrally formed liquid level scale of 0-500mL.

[0033] When injecting saline solution into the inner liner, the user can observe the injection height of the rinsing solution in real time through the vertically extending transparent observation window 101 on the front of the outer shell. By referring to the 0-500mL liquid level scale integrally formed on the outside of the observation window, the user can accurately control the injection dosage. During the nasal rinsing operation, the user can observe the liquid level of the remaining rinsing solution in the sterile inner liner 3 in real time through the transparent observation window 101 to know the remaining usable dosage.

[0034] During nasal irrigation, the saline solution in the sterile inner tank 3 enters the tubing 308 through the infusion tube inlet 307 at the bottom. The tubing 308 smoothly turns along the arc-shaped guide channel and passes through the gradient flat guide nozzle 306 and the sliding flow regulating switch assembly in sequence before extending out of the outer rigid PP square shell 1. The conical opening of the infusion tube inlet 307 faces the bottom of the sterile inner tank 3, so that the irrigation solution can be delivered through the tubing 308 to the detachable nasal irrigation nozzle threadedly connected to its outlet end.

[0035] During flow adjustment, the user pushes the flow adjustment block 1010 with one hand, causing it to slide laterally along the slider limit guide groove 109 within the adjustment groove 305. The flow adjustment block 1010 drives the adjustment wedge block 1011 to move synchronously. By adjusting the wedge block 1011, the user can compress or release the hose 308, changing the conduction cross-sectional area of ​​the hose 308. When sliding in the closing direction, the conduction cross-sectional area of ​​the hose 308 gradually decreases until the pipeline is closed and the water flow is turned off. When sliding in the opening direction, the hose 308 gradually recovers, and the water flow increases accordingly. The rinsing solution finally flows out from the detachable nasal rinse nozzle threaded to the outlet end of the hose 308, completing the nasal rinse. When the nozzle needs to be replaced, simply unscrew the original nasal rinse nozzle and screw on another nasal rinse nozzle.

[0036] During the injection operation, pull up and remove the outer cover 2. Inject the prepared nasal wash saline into the sterile inner liner 3 through the inner liner injection port 301 at the top of the sterile inner liner 3. After the injection is completed, close the outer cover 2 onto the top of the outer rigid PP square outer cover 1, so that the upper cover positioning slot 201 fits around the outer periphery of the inner liner injection port 301. When not hanging, the flip hanging ring 202 is attached to the top surface of the outer cover 2. When hanging, flip the flip hanging ring 202 outward and hang it on a wall hook or shelf.

[0037] The working principle and usage process of this invention are as follows: During assembly, the sterile inner liner 3 is inserted into the inner liner assembly limiting groove 102 of the outer rigid PP square shell 1 via the inner liner assembly positioning boss 302. Before use, the shell cover 2 is opened, and nasal irrigation saline is injected into the sterile inner liner 3 through the inner liner injection port 301. The injection volume is confirmed through the transparent observation window 101. The detachable nasal irrigation nozzle is threaded onto the outlet end of the hose 308. One side sealing plug assembly is removed, allowing outside air to enter the sterile inner liner 3 through the PTFE hydrophobic microporous filter membrane 303 to maintain air pressure balance. The irrigation fluid enters the hose 308 through the infusion tube inlet end 307. Pushing the flow regulating pressure block 1010 drives the adjusting wedge block 1011 to squeeze or release the hose 308, thereby adjusting the water flow rate. The irrigation fluid flows out through the hose 308 and the detachable nasal irrigation nozzle. After pausing or use, the water flow is turned off, and the hose 308 is locked into the hose retainer 309 for fixation.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adjustable flow sterile visual nasal irrigator, comprising an outer rigid PP square shell (1), characterized in that: The outer rigid PP square shell (1) is equipped with a sterile inner liner (3). There is an assembly gap between the outer rigid PP square shell (1) and the sterile inner liner (3). The outer rigid PP square shell (1) has a vertically extending transparent observation window (101) on the front. The sterile inner liner (3) has outwardly extending side sleeves (103) on both sides of the lower part, and each side sleeve (103) has a fixed PTFE hydrophobic microporous filter membrane (303) inside. The outer rigid PP square shell (1) has openings corresponding to each side sleeve (103), and the end of the side sleeve (103) passes through the opening. The outer rigid PP square shell (1) has a sealing plug assembly corresponding to each side sleeve (103) on the outside. The sealing plug assembly includes a locking buckle (104), a central column (107), and a sealing ring (106). The central column (107) is integrally formed in the center of the inner side of the locking buckle (104). The sealing ring (106) is sleeved on the outer periphery of the central column (107). The end of the central column (107) facing the PTFE hydrophobic microporous filter membrane (303) is fixedly connected to a filter membrane contact plate (108) that abuts against the PTFE hydrophobic microporous filter membrane (303). The sterile inner liner (3) is provided with a gradient flat guide nozzle (306) at the bottom. The outlet direction of the gradient flat guide nozzle (306) is set horizontally forward. The outer rigid PP square shell (1) is provided with a horizontally arranged sliding flow regulating switch assembly at the bottom front. The sterile inner liner (3) is provided with a hose (308). One end of the hose (308) extends to the bottom of the sterile inner liner (3) through an arc-shaped guide channel and is provided with an infusion tube inlet end (307). The other end of the hose (308) passes through the gradient flat guide nozzle (306) and the sliding flow regulating switch assembly in sequence and extends out of the outer rigid PP square shell (1). The end of the hose (308) is threaded with a detachable nasal spray nozzle. The outer rigid PP square shell (1) is provided with a hose clamping groove (309) for clamping the hose (308).

2. The adjustable flow sterile visual nasal irrigator according to claim 1, characterized in that: The outer rigid PP square shell (1) is provided with a shell cover (2) on the top. The inner side of the shell cover (2) is provided with a cover positioning groove (201). The sterile inner liner (3) is provided with an inner liner injection port (301) on the top. The cover positioning groove (201) is adapted to the inner liner injection port (301). The top of the shell cover (2) is rotatably connected with a flip hanging ring (202). The flip hanging ring (202) can fit against the top surface of the shell cover (2). The top edge of the sterile inner liner (3) is provided with an inner liner assembly positioning boss (302). The top of the inner wall of the outer rigid PP square shell (1) is provided with an inner liner assembly limiting groove (102). The inner liner assembly positioning boss (302) engages with the inner liner assembly limiting groove (102).

3. The adjustable flow sterile visual nasal irrigator according to claim 1, characterized in that: The inner wall of the side sleeve (103) is provided with a sealing and locking protrusion (1031), and the outer side of the sealing ring (106) is provided with a locking and sealing groove (1061). The sealing and locking protrusion (1031) and the locking and sealing groove (1061) are adapted to engage.

4. The adjustable flow sterile visual nasal irrigator according to claim 1, characterized in that: The locking buckle (104) has an auxiliary force-applying groove (105) on its outer side. The diameter of the central post (107) is adapted to the opening diameter of the outer rigid PP square shell (1). The length of the central post (107) matches the extension length of the side sleeve (103). The filter membrane contact plate (108) has a circular planar structure.

5. The adjustable flow sterile visual nasal irrigator according to claim 1, characterized in that: The gradient flat guide nozzle (306) is integrally injection molded with the sterile inner liner (3). The upper part of the gradient flat guide nozzle (306) is a circular channel and the lower part is a flat channel. The hose (308) passes through the gradient flat guide nozzle (306) and gradually extends from vertical to horizontal.

6. The adjustable flow sterile visual nasal irrigator according to claim 1, characterized in that: The outer rigid PP square shell (1) has an installation tilting groove (304) at the bottom front, and an adjustment groove (305) is provided inside the installation tilting groove (304). The inner wall of the outer rigid PP square shell (1) has a slider limiting guide groove (109), and the sliding flow regulating switch assembly is assembled inside the adjustment groove (305).

7. The adjustable flow sterile visual nasal irrigator according to claim 6, characterized in that: The sliding flow regulating switch assembly includes a flow regulating pressure block (1010) and an adjusting wedge block (1011). The flow regulating pressure block (1010) is slidably connected inside the slider limiting guide groove (109), and the adjusting wedge block (1011) is fixedly connected to the side of the flow regulating pressure block (1010) facing the adjusting slide groove (305).

8. The adjustable flow sterile visual nasal irrigator according to claim 1, characterized in that: The transparent observation window (101) is embedded in the outer rigid PP square shell (1), and a silicone sealing ring is provided at the assembly point. The outer side of the transparent observation window (101) is integrally formed with a liquid level scale of 0 to 500 mL.

9. The adjustable flow sterile visual nasal irrigator according to claim 1, characterized in that: The radius of the arc-shaped guide channel is 5-8 mm. The hose (308) is arranged to fit the inner wall of the arc-shaped guide channel. The inlet end (307) of the infusion tube has a conical opening structure and the opening faces the bottom of the sterile inner liner (3).

10. The adjustable flow sterile visual nasal irrigator according to claim 1, characterized in that: The outlet end of the hose (308) is provided with a threaded connection, and the inlet end of the detachable nasal spray head is provided with a threaded interface that is compatible with the threaded connection.

Images