Positive-pressure electric spray nasal irrigator

Abstract

The invention relates to the technical field of spray nasal irrigators, in particular to a positive-pressure electric spray nasal irrigator, which comprises a main machine part, a positive-pressure pump, a negative-pressure pump, a negative-pressure pump, a negative-pressure pump, a positive-pressure pump and a negative-pressure pump, a nose head part and a limiting nest arranged on the nose head part are included, a spray head is rotationally installed in the limiting nest in a limited mode, a central atomization cavity is formed in the spray head, part of the outer wall of the spray head is exposed out of the limiting nest, the spray head is associated with a positive pressure pump, and an atomization module is installed in the central atomization cavity. Radial atomizing holes communicated with the outside are formed in the inner wall of the central atomizing cavity so as to spray functional fog drops to a cleaning area in the nasal cavity; before spray impact, pre-tightening lifting stress can be generated on viscous secretions, the viscous secretions are loosened, the adhesive force between the viscous secretions and mucous membranes is weakened, spray flushing is facilitated, and falling objects and waste liquid wrapped by fog drops can be captured from the periphery and recycled and collected.

Description

Technical Field

[0001] This invention relates to the technical field of nasal spray irrigators, specifically a positive pressure electric nasal spray irrigator. Background Technology

[0002] Nasal irrigation is an effective adjunctive therapy for relieving symptoms of allergic rhinitis, sinusitis, and other diseases. Currently, the mainstream products on the market, such as manual nasal irrigation pots and first-generation electric nasal irrigators, all work on the principle of positive pressure irrigation: that is, by manually squeezing or driving a motor, the cleaning solution is poured into one nostril, flows through the nasal cavity, and then flows out naturally from the other nostril or mouth by gravity or the pressure of the liquid itself.

[0003] However, in existing technologies, when nasal irrigators are in forward rinsing mode, the secretions, allergens, and other contaminants sprayed down mix with the rinsing solution and can only move slowly within the complex nasal passages and eventually be expelled due to their fluidity. Furthermore, due to their inherent cohesive force and adhesion to the mucous membrane, viscous secretions often form a continuous and firmly adhered layer on the inner wall of the nasal cavity. The mist generated by traditional rinsing methods has a force direction that is mainly parallel to the mucous membrane surface. When the fluid impacts this viscous layer, a "water over a duck's back" surface sliding effect is very likely to occur, that is, the fluid only flows over the surface of the secretions and fails to transfer sufficient shear force to the adhesion interface between the secretions and the mucous membrane. As a result, the viscous substance is pushed and deformed as a whole rather than effectively peeled off. Summary of the Invention

[0004] This invention provides a positive pressure electric spray nasal irrigator that can generate a pre-tightening lifting stress on viscous secretions before the spray impact, loosening the viscous secretions and weakening their adhesion to the mucous membrane, making it easier to rinse with spray. It can also capture and collect detached material and waste liquid entrained by the droplets from all sides.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A positive pressure electric nasal spray irrigator, comprising: The main unit contains a positive pressure pump and a negative pressure pump. The nose tip has a limiting recess within it, where a nozzle is rotatably mounted. The nozzle has a central atomizing chamber, with a portion of its outer wall exposed outside the limiting recess. The nozzle is associated with the positive pressure pump, and an atomizing module is installed within the central atomizing chamber. The inner wall of the central atomizing chamber has radial spray holes communicating with the outside to spray functional droplets into the cleaning area within the nasal cavity. The center of the nozzle is located on the axis of the nose tip. A negative pressure chamber is located inside the nose tip, uniformly surrounding the nozzle and coaxial with it. An array of suction holes communicating with the outside is located at the top of the negative pressure chamber. The negative pressure chamber is associated with the negative pressure pump and is used to create a negative pressure field around the spray area to loosen viscous secretions.

[0006] Optionally, the area between the outer edge of the nose tip and the limiting socket is recessed downward to form a sunken portion, the suction hole is opened on the sunken portion, and the lowest exposed radial spray hole on the nozzle is higher than the height of the suction hole.

[0007] Optionally, the nozzle has two integrally formed flexible shafts, which constitute the external rotating shaft of the nozzle. The two flexible shafts are fixedly connected to the outer wall of the limiting socket. The flexible shafts are made of a resettable flexible material, which can accumulate elastic potential energy for reset after torsion. An eccentric pull rope is fixedly installed on the outer wall of the nozzle. The connection point of the eccentric pull rope is far away from the axis of the nose tip. The inside of the nose tip is also designed with a miniature actuator for pulling the eccentric pull rope to drive the nozzle to rotate.

[0008] Optionally, the micro actuator includes a drive housing fixedly installed inside the nose tip. An electric heating element is fixedly installed at the bottom of the drive housing. Multiple thermally conductive pads are stacked inside the drive housing on the electric heating element. The eccentric pull rope slides through the drive housing. A shape memory alloy wire is fixedly connected to the bottom of the drive housing. The shape memory alloy wire is in an S-shaped expansion state. When heated, the shape memory alloy wire can fold and contract and pull the eccentric pull rope downward.

[0009] Optionally, the top of the highest point of the limiting cavity is designed with a sharp part, the tip of which abuts against the outer wall of the nozzle. The nozzle, the sharp part, and the limiting cavity are all made of rigid plastic, and the limiting cavity and the nozzle are connected by a tight ball-and-socket joint.

[0010] Optionally, the positive pressure electric nasal spray device further includes a liquid storage section located between the nasal tip and the main unit. The liquid storage section has an openable waste liquid compartment. The liquid storage section is detachably assembled with the nasal tip. An air supply pipe is installed through the bottom of the waste liquid compartment. A drainage pipe extends downward from the bottom of the negative pressure chamber. The drainage pipe can be connected to the sealed waste liquid compartment. The air supply pipe is connected to a negative pressure pump to keep the waste liquid compartment and the inside of the negative pressure chamber under negative pressure. The negative pressure pump can operate in a pulse-like manner.

[0011] Optionally, a plurality of reinforcing ribs are installed on the conical annular inner wall near the top of the negative pressure chamber, and the plurality of reinforcing ribs are distributed in a circumferential array along the nasal head axis.

[0012] Optionally, the liquid storage section is further provided with a cleaning chamber and a drug delivery chamber. The drug delivery chamber and the cleaning chamber are designed independently and are both associated with a positive pressure pump. The opening and closing of the pipeline between the drug delivery chamber and the cleaning chamber and the positive pressure pump are controlled by a solenoid valve. Both the cleaning chamber and the drug delivery chamber are designed with covers.

[0013] Optionally, the atomizing module includes a flexible tube communicating with the central atomizing chamber, the flexible tube being connected to the output end of the positive pressure pump, and a piezoelectric atomizing plate being fixedly installed at the bottom of the central atomizing chamber, the droplets generated by the piezoelectric atomizing plate being output outward through radial spray holes.

[0014] Optionally, the nasal tip has a frustum-shaped structure, and the annular outer wall of the nasal tip is wrapped with a silicone layer. An air cavity is opened at the lowest point of the frustum of the nasal tip. The air cavity has an annular routing line and a switch valve port is designed on the air cavity. The air cavity expands after being inflated to adapt to the nasal vestibule.

[0015] This invention provides a positive pressure electric nasal spray device, which has the following advantages compared to the prior art: The coaxial design of the central atomizing chamber and the surrounding annular negative pressure chamber, combined with the pulse working mode of the negative pressure pump, creates an intermittent negative pressure field before the spray impact. This field generates periodic "lifting and relaxing" stress on the sticky secretions, loosening them and effectively disrupting their adhesion interface with the mucous membrane. This allows subsequent spray to wedge into the cracks and achieve efficient peeling.

[0016] During the spray rinsing process, the mixture of secretions and droplets will settle or accumulate in the nasal cavity under the influence of gravity. Since the recessed lower part is located below the spray area, the mixture will be attracted and collected by the lower part, thus completing the collection of mixed waste liquid and greatly improving the cleaning effect. Compared with simply relying on gravity backflow, the negative pressure suction method can collect waste liquid better and faster, avoiding the accumulation of waste liquid in the nasal cavity.

[0017] Third, through the combination of a flexible shaft, an eccentric pull rope, and a micro actuator, the micro actuator pulls the nozzle to deflect at a certain angle by deforming the thermo-controlled memory alloy wire, so that the spray direction can be dynamically aimed at the user's nasal turbinates, olfactory cleft, or sinus openings and other key physiological structures. At the same time, the frustum-shaped nose tip, together with its external silicone layer and inflatable air cavity, can gently adapt to the anatomical shape of different users' nasal vestibules, ensuring effective fluid sealing and preventing liquid leakage while minimizing the feeling of insertion of foreign objects and pressure. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the nose tip and the liquid storage part of the present invention; Figure 2 This is a right view of the nasal tip of the present invention; Figure 3 For the present invention along Figure 2 A schematic diagram of the structure viewed in section AA; Figure 4 For the present invention along Figure 3 A structural schematic diagram of the cross-section at point BB; Figure 5 This is a schematic diagram of the internal structure of the nasal head in this invention; Figure 6 This is an enlarged view of the structure at point C in Figure 3 of the present invention; Figure 7 This is an enlarged view of the structure at point D in Figure 4 of the present invention; Figure 8 This is a three-dimensional structural diagram of the exterior of the present invention.

[0019] In the diagram: 1. Nose tip; 2. Liquid reservoir; 3. Main unit; 4. Nozzle; 5. Submerged part; 6. Tip; 7. Negative pressure chamber; 8. Hose; 9. Limiting recess; 11. Eccentric pull rope; 12. Shape memory alloy wire; 13. Thermal pad; 14. Heating element; 15. Drive housing; 16. Air chamber; 17. Flexible shaft; 18. Waste liquid tank; 19. Piezoelectric atomizing plate; 21. Gas delivery pipe; 22. Drainage pipe; 23. Reinforcing rib. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1 to 8 The present invention provides a technical solution: a positive pressure electric nasal spray irrigator, comprising: The main unit 3 contains a positive pressure pump and a negative pressure pump; the nose head 1 has a limiting cavity 9 disposed on it, and a nozzle 4 is rotatably mounted within the limiting cavity 9. The nozzle 4 has a central atomizing chamber, and part of the outer wall of the nozzle 4 is exposed outside the limiting cavity 9. The nozzle 4 is associated with the positive pressure pump, and an atomizing module is installed in the central atomizing chamber. The inner wall of the central atomizing chamber has radial spray holes that communicate with the outside to spray functional droplets into the cleaning area inside the nasal cavity. The center of the nozzle 4 is located on the axis of the nose head 1; a negative pressure chamber 7 is formed inside the nose head 1, and the negative pressure chamber 7 is evenly surrounding the outside of the nozzle 4. The negative pressure chamber 7 and the nozzle 4 are coaxially designed. The top of the negative pressure chamber 7 has an array of suction holes that communicate with the outside. The negative pressure chamber 7 is associated with the negative pressure pump and is used to form a negative pressure field around the spray area to loosen viscous secretions.

[0022] In existing technologies, traditional positive pressure nasal irrigators, when flushing viscous or strongly adhesive nasal secretions, such as purulent nasal discharge, are prone to a "surface slippage effect" due to the unidirectional and parallel fluid impact on the mucosal surface. This means the cleaning fluid only flows over the surface of the secretions, failing to effectively transfer sufficient shear force to the adhesion interface between the secretions and the nasal mucosa. This results in the viscous material being pushed and deformed as a whole rather than effectively peeled off, leading to an increase in the number of spray flushes and potentially causing ear risks due to positive pressure issues. In contrast, this solution… The nozzle 4 and the negative pressure chamber 7 are coaxially designed, and the negative pressure chamber 7 surrounds the central atomizing chamber. Through the designed array of suction holes, a uniform and stable negative pressure suction field is formed around the spray area of ​​the nozzle 4. This negative pressure suction field can generate a pre-tightening lifting stress on the sticky secretions before the spray impact, loosen the sticky secretions, weaken their adhesion to the mucous membrane, and thus facilitate spray rinsing. Secondly, at the moment when the spray peels off the secretions, it immediately captures the detached material and waste liquid carried by the droplets from all sides.

[0023] The radial spray orifice design allows the droplets to evenly cover the nasal cavity wall, while by providing a negative pressure field around the spray area to form a closed streamline, direct collision is avoided and the flow field is guided, which can more effectively capture the mixture of droplets and secretions that bounce off or flow down from the mucosal surface.

[0024] This manual also provides a nasal irrigation method, applied to the positive pressure electric nasal spray irrigator of this invention, comprising the following steps: Pilot negative pressure procedure: Start the negative pressure pump to establish an initial negative pressure field in the nasopharyngeal region to loosen viscous secretions.

[0025] Synergistic nebulization steps: Activate the positive pressure pump to spray cleaning solution droplets into the nasal cavity while maintaining or adjusting the negative pressure field.

[0026] III. Synchronous Recovery Steps: Using a negative pressure field, the mixture of droplets and secretions is synchronously recovered into the negative pressure chamber 7 through the negative pressure suction chamber.

[0027] In a preferred embodiment, the area between the outer edge of the nose tip 1 and the limiting recess 9 is recessed downward to form a sunken portion 5. The suction hole is located on the sunken portion 5. The lowest exposed radial spray hole on the nozzle 4 is higher than the height of the suction hole. (See also...) Figure 1 , Figure 3 , Figure 4 and Figure 5In this embodiment, when the nasal tip 1 enters the nasal cavity, the outer wall of the nasal tip 1 will adhere to the nasal cavity. During the spray rinsing process, the mixture of secretions and droplets will settle or accumulate in the nasal cavity under the action of gravity. Since the recessed sinking part 5 is located below the spray area, most of the mixture will be attracted and received by the sinking part 5, thereby completing the suction and collection of the mixed waste liquid, greatly improving the cleaning effect. Compared with simply relying on gravity backflow, the negative pressure suction method can collect waste liquid better and faster, avoiding the accumulation of waste liquid in the nasal cavity, which can easily cause reflexive coughing. For children or patients with weak swallowing function, there is also a risk of aspiration. It also reduces ear pressure and avoids ear risks, such as waste liquid or bacteria entering the middle ear through the pharyngeal opening of the Eustachian tube, causing infection and other problems.

[0028] Based on the embodiment of negative pressure suction to remove secretions, two flexible shafts 17 are integrally formed on the nozzle 4. These two flexible shafts 17 constitute the external rotating shaft of the nozzle 4. The two flexible shafts 17 are fixedly connected to the recessed outer wall of the limiting socket 9. The flexible shafts 17 are made of a resettable flexible material, which can accumulate elastic potential energy for reset after torsion. An eccentric pull rope 11 is fixedly installed on the outer wall of the nozzle 4. The connection point of the eccentric pull rope 11 is away from the axis of the nose tip 1. A miniature actuator is also designed inside the nose tip 1 to pull the eccentric pull rope 11 to drive the nozzle 4 to rotate. Please refer to [link to relevant documentation]. Figure 3 , Figure 4 and Figure 6 In this embodiment, the nozzle 4 can be angled by using a micro-actuator and an eccentric pull rope 11, thereby changing the spray area radiated by the nozzle 4 to meet the needs of people with different nasal shapes. Specifically, the nozzle 4 is rotatably mounted on the outer wall of the limiting socket 9 via two flexible shafts 17. When the eccentric pull rope 11 pulls the nozzle 4 to rotate, the flexible shaft 17 will twist due to the fixed connection between the limiting socket 9 and the flexible shaft 17, thereby accumulating elastic potential energy. When the eccentric pull rope 11 is released, the nozzle 4 can be reset to the initial state under the drive of the elastic potential energy. This design can adapt to the nasal cavity anatomical curve, thereby enabling the rinsing or administration of medication to areas that are difficult to clean, such as the nasal turbinates, olfactory cleft, and sinus openings.

[0029] Based on the embodiment of nozzle angle adjustment, the micro actuator includes a drive housing 15 fixedly installed inside the nose tip 1. A heating element 14 is fixedly installed at the bottom of the drive housing 15. Multiple heat-conducting pads 13 are stacked inside the drive housing 15 on top of the heating element 14. An eccentric pull rope 11 slides through the drive housing 15, and a shape memory alloy wire 12 is fixedly connected to the bottom end of the drive housing 15. The shape memory alloy wire 12 is in an S-shaped expanded state. When heated, the shape memory alloy wire 12 can fold and contract, pulling the eccentric pull rope 11 downwards. Please refer to [reference needed]. Figure 3 and Figure 6In this embodiment, the heating element 14 serves as a heat source. After being energized, the heating element 14 generates heat and quickly transfers the heat to multiple thermal pads 13. The thermal pads 13 then transfer the heat to the shape memory alloy wire 12. After reaching the preset phase change temperature, the shape memory alloy wire 12 folds and contracts to pull the eccentric pull rope 11. The contraction direction of the shape memory alloy wire 12 is perpendicular to the stacking direction of the thermal pads 13, causing the thermal pads 13 to be compressed in the thickness direction when the shape memory alloy wire 12 is repositioned. When the shape memory alloy wire 12 is reset, the thermal pads 13 elastically recover. In the specific implementation process, it is necessary to control the deformation of the shape memory alloy wire 12 to provide a certain deformation space for the thermal pads 13 and avoid excessive reaction force of the thermal pads 13.

[0030] The thermal pad 13 is a pre-formed, sheet-like solid thermal conductive material, usually made of a silicone rubber matrix filled with high thermal conductivity ceramic powders such as alumina and boron nitride, and has ultra-soft properties and thermal conductivity.

[0031] Based on the embodiment of nozzle 4 angle adjustment, a pointed portion 6 is designed at the top of the highest point of the limiting recess 9. The tip of the pointed portion 6 abuts against the outer wall of the nozzle 4. The nozzle 4, the pointed portion 6, and the limiting recess 9 are all made of rigid plastic. The limiting recess 9 and the nozzle 4 are connected by a tight ball-and-socket joint. Please refer to [link / reference]. Figure 4 , Figure 5 and Figure 7 In this embodiment, through the cooperation between the sharp part 6, the limiting socket 9 and the nozzle 4, the limiting socket 9 can seal the radial spray holes on the nozzle 4 that are not in the target direction. The sharp part 6 can use its tip to scrape and clean the outer wall of the nozzle 4, thereby achieving a self-cleaning function and preventing the sticky liquid from adhering. Furthermore, the waste liquid scraped off will also flow into the sinking part 5 and be attracted by negative pressure.

[0032] Based on the embodiment of negative pressure suction to remove secretions, the positive pressure electric nasal spray irrigator also includes a liquid storage unit 2, located between the nasal tip 1 and the main unit 3. The liquid storage unit 2 has an openable waste liquid chamber 18. The liquid storage unit 2 is detachably assembled with the nasal tip 1. An air supply pipe 21 is installed through the bottom of the waste liquid chamber 18. A drainage pipe 22 extends downward from the bottom of the negative pressure chamber 7, and the drainage pipe 22 can be connected to the sealed waste liquid chamber 18. The air supply pipe 21 is associated with a negative pressure pump to maintain a negative pressure state inside the waste liquid chamber 18 and the negative pressure chamber 7. The negative pressure pump can operate in a pulse-like manner. Please refer to [link to relevant documentation]. Figures 1 to 5In this embodiment, to prevent waste liquid from being sucked into the negative pressure pump, a partition is formed between the negative pressure pump and the negative pressure chamber 7, and the height of the air supply pipe 21 is used to prevent this. The waste liquid in the negative pressure chamber 7 will flow into the waste liquid tank 18 through the drainage pipe 22. The air supply pipe 21 prevents the waste liquid from entering the negative pressure pump. The waste liquid tank 18 is located on the liquid storage part 2 and has a cover that can be opened, which makes it easier to clean or repair the waste liquid tank 18, the air supply pipe 21 and the negative pressure pump. In addition, the pulse operation of the negative pressure pump can provide better instantaneous lifting stress, so that the viscous secretions can be effectively peeled off. At the same time, the pulse operation can reduce the pressure in the ear canal or eustachian tube, actively avoid ear canal risks, and also reduce the stimulation of the fragile mucosa in the nasal cavity and reduce congestion.

[0033] Based on the embodiment of negative pressure suction to remove secretions, multiple reinforcing ribs 23 are installed on the conical annular inner wall of the negative pressure chamber 7 near the top. The multiple reinforcing ribs 23 are distributed in a circumferential array along the axis of the nose tip 1. In the slender nose tip 1, the anti-collapse design of the inner wall of the negative pressure chamber 7 is the basis for ensuring stable negative pressure and reliable function. In order to reduce interference with the negative pressure chamber 7 and avoid increasing flow resistance, the reinforcing ribs 23 are designed to enhance the negative pressure chamber 7's resistance to negative pressure collapse.

[0034] Furthermore, the liquid storage section 2 also includes a cleaning chamber and a drug delivery chamber. Both the drug delivery chamber and the cleaning chamber are independently designed and connected to a positive pressure pump. The opening and closing of the pipelines between the drug delivery chamber and the cleaning chamber and the positive pressure pump are controlled by solenoid valves. Both the cleaning chamber and the drug delivery chamber are covered. Please refer to [link to relevant documentation]. Figure 1 In this embodiment, the function of the nasal irrigator is expanded to enable its application to patients with nasal inflammation, providing drug delivery for their postoperative recovery and daily cleaning.

[0035] In summary, the atomizing module further includes a flexible tube 8 connected to the central atomizing chamber, the flexible tube 8 being connected to the output end of the positive pressure pump, and a piezoelectric atomizing plate 19 being fixedly installed at the bottom of the central atomizing chamber. The droplets generated by the piezoelectric atomizing plate 19 are output outward through radial spray holes.

[0036] Furthermore, the nasal tip 1 has a frustum-shaped structure, and the annular outer wall of the nasal tip 1 is wrapped with a silicone layer. An air chamber 16 is opened at the lowest point of the frustum of the nasal tip 1. The air chamber 16 has a ring-shaped routing and a switch valve port is designed on the air chamber 16. After the air chamber 16 is inflated, it expands to adapt to the nasal vestibule. The composite structure of the frustum column and the silicone layer can not only ensure a comfortable fit, but also use the expansion of the air chamber 16 to form a sealing ring to achieve fluid sealing and reduce pressure. When the patient adjusts to a comfortable degree of expansion, it can be used for a long time.

[0037] By utilizing the combination of the above structures, a pre-tightening lifting stress can be generated on the viscous secretions before the spray impact, loosening the viscous secretions and weakening their adhesion to the mucous membrane, thereby facilitating spray rinsing. It can also capture the detached material and waste liquid entrained by the droplets from all sides for recycling.

[0038] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural parts described in the specification and drawings can also be processed without any doubt based on existing technical common sense. At the same time, the connection methods of each component adopt mature conventional methods in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so they will not be described in detail here.

[0039] 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 and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A positive pressure electric nasal spray irrigator, characterized in that: include: The main unit (3) is equipped with a positive pressure pump and a negative pressure pump; Nose tip (1), a limiting socket (9) disposed on the nose tip (1), a nozzle (4) is installed in the limiting socket (9) for limiting rotation, a central atomizing chamber is opened in the nozzle (4), part of the outer wall of the nozzle (4) is exposed outside the limiting socket (9), the nozzle (4) is associated with a positive pressure pump, and an atomizing module is installed in the central atomizing chamber. A radial spray hole communicating with the outside is opened on the inner wall of the central atomizing chamber to spray functional droplets into the cleaning area inside the nasal cavity; The center of the nozzle (4) is located on the axis of the nose tip (1); A negative pressure chamber (7) is opened inside the nose tip (1). The negative pressure chamber (7) is evenly surrounded on the outside of the nozzle (4). The negative pressure chamber (7) and the nozzle (4) are coaxially designed. Suction holes communicating with the outside are arranged in an array at the top of the negative pressure chamber (7). The negative pressure chamber (7) is associated with a negative pressure pump and is used to form a negative pressure field around the spray area to loosen the viscous secretions.

2. The positive pressure electric nasal spray irrigator according to claim 1, characterized in that: The area between the outer edge of the nose tip (1) and the limiting socket (9) is recessed downward to form a sunken part (5), the suction hole is opened on the sunken part (5), and the lowest exposed radial spray hole on the nozzle (4) is higher than the height of the suction hole.

3. The positive pressure electric nasal spray irrigator according to claim 2, characterized in that: The nozzle (4) has two integrally formed flexible shafts (17), which constitute the external rotating shaft of the nozzle (4). The two flexible shafts (17) are fixedly connected to the outer wall of the limiting socket (9). The flexible shafts (17) are made of a reversible flexible material. After twisting, they can accumulate elastic potential energy for resetting. An eccentric pull rope (11) is fixedly installed on the outer wall of the nozzle (4). The connection point of the eccentric pull rope (11) is far away from the axis of the nose head (1). The inside of the nose head (1) is also designed with a miniature actuator for pulling the eccentric pull rope (11) to drive the nozzle (4) to rotate.

4. The positive pressure electric nasal spray irrigator according to claim 3, characterized in that: The micro actuator includes a drive housing (15) fixedly installed inside the nose (1). A heating element (14) is fixedly installed at the bottom of the drive housing (15). Multiple heat-conducting pads (13) are stacked inside the drive housing (15) on the heating element (14). The eccentric pull rope (11) slides through the drive housing (15). A shape memory alloy wire (12) is fixedly connected to the bottom end of the drive housing (15). The shape memory alloy wire (12) is in an S-shaped expansion state. When heated, the shape memory alloy wire (12) can fold and shrink and pull the eccentric pull rope (11) downward.

5. The positive pressure electric nasal spray irrigator according to claim 3, characterized in that: The top of the highest point of the limiting socket (9) is designed with a sharp part (6), the tip of the sharp part (6) abuts against the outer wall of the nozzle (4). The nozzle (4), the sharp part (6) and the limiting socket (9) are all made of hard plastic. The limiting socket (9) and the nozzle (4) are connected by a tight ball-and-socket connection.

6. The positive pressure electric nasal spray irrigator according to claim 2, characterized in that: The positive pressure electric spray nasal irrigator also includes a liquid storage section (2), which is located between the nose tip (1) and the main unit (3). The liquid storage section (2) has an openable waste liquid chamber (18). The liquid storage section (2) is detachably assembled with the nose tip (1). An air supply pipe (21) is installed through the bottom of the waste liquid chamber (18). A drainage pipe (22) extends downward from the bottom of the negative pressure chamber (7). The drainage pipe (22) can be connected to the sealed waste liquid chamber (18). The air supply pipe (21) is associated with a negative pressure pump to keep the waste liquid chamber (18) and the inside of the negative pressure chamber (7) in a negative pressure state. The negative pressure pump can perform pulse operation.

7. The positive pressure electric nasal spray irrigator according to claim 2, characterized in that: The negative pressure chamber (7) has multiple reinforcing ribs (23) installed on the conical annular inner wall near the top, and the multiple reinforcing ribs (23) are distributed in a circumferential array along the axis of the nose (1).

8. The positive pressure electric nasal spray irrigator according to claim 6, characterized in that: The liquid storage section (2) is also provided with a cleaning chamber and a drug delivery chamber. The drug delivery chamber and the cleaning chamber are designed independently and are both associated with a positive pressure pump. The opening and closing of the pipeline between the drug delivery chamber and the cleaning chamber and the positive pressure pump are controlled by a solenoid valve. Both the cleaning chamber and the drug delivery chamber are designed with a cover.

9. The positive pressure electric nasal spray irrigator according to any one of claims 1-8, characterized in that: The atomizing module includes a flexible tube (8) connected to the central atomizing chamber. The flexible tube (8) is connected to the output end of the positive pressure pump. A piezoelectric atomizing plate (19) is fixedly installed at the bottom of the central atomizing chamber. The droplets generated by the piezoelectric atomizing plate (19) are output outward through radial spray holes.

10. The positive pressure electric nasal spray irrigator according to claim 9, characterized in that: The nasal head (1) is a frustum-shaped structure, and the annular outer wall of the nasal head (1) is covered with a silicone layer. An air cavity (16) is provided at the lowest point of the frustum of the nasal head (1). The air cavity (16) is a ring-shaped line. A switch valve is designed on the air cavity (16). The air cavity (16) expands after being inflated to adapt to the nasal vestibule.

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