Nasal irrigation device having moving cleaning rod

Abstract

Provided is a nasal irrigation device, comprising a liquid pump, a cleaning rod (101), a cleaning liquid receiving part, and a liquid return channel. The liquid pump raises the pressure energy of a cleaning liquid, and the pressure energy enables the cleaning liquid to be sprayed out of a nozzle (10102) arranged at one end of the cleaning rod (101), thereby cleaning an inner region of the nasal cavity where the nozzle (10102) is located. The cleaning liquid flows out of the corresponding nostril for liquid return. An exhaust device connected to the liquid return channel is configured to control negative pressure, and the negative pressure is configured to assist in liquid return. The nozzle (10102) is disposed at the upper part of the cleaning rod (101) and located at a side part or a top end of the cleaning rod (101), and the nozzle (10102) at the top end has a spray angle greater than 90 degrees. The nasal irrigation device comprises an energy conversion driving device configured to control the compound motion of the nozzle (10102) or other cleaning parts, and the compound motion comprises the movement of a projection point of the nozzle (10102) or other cleaning parts on the two dimensional plane in any specified direction, and the rotation and lifting of the nozzle (10102) or other cleaning parts.

Description

A nasal irrigation device with a moving cleaning rod Technical Field

[0001] This invention relates to a nasal cavity cleaning device, belonging to the field of medical device technology. Background Technology

[0002] Nasal irrigation, also known as nasal irrigation or cleaning, is a treatment method that uses a device to deliver rinsing solution into the nasal cavity. Through the contact between the rinsing solution and the nasal tissues, the nasal cavity is cleaned and treated.

[0003] Nasal cleaning can be performed routinely; however, it becomes more important when the body experiences sinusitis, rhinitis, or a cold. Through its antibacterial and anti-inflammatory effects, nasal cleaning helps restore the nasal cavity to its normal physiological environment and self-detoxification function, thus protecting the nasal cavity. In many cases, nasal mucus accumulates, sometimes drying and hardening into crusts; currently available nasal cleaning devices are not very suitable for this situation.

[0004] During a typical nasal irrigation process, saline solution or medication can be added to the nasal spray chamber and used to repeatedly rinse both nostrils. Most of the saline solution or medication will flow out from the other nostril. This method is not very comfortable and is poorly tolerated. It is also extremely inefficient when hardened plaque has formed.

[0005] A nasal cleaning spray container for infants and young children (CN 219423289 U) discloses a spray container that can clean the nasal cavity one by one. However, the spraying method and the storage method of the liquid result in low cleaning efficiency, and the comfort during cleaning also needs to be improved.

[0006] The purpose of this invention is to design a high-efficiency cleaning device for daily and medical cleaning, which is also reasonably structured, easy to use, and convenient for people's daily use. Summary of the Invention

[0007] This invention designs a nasal cavity cleaning device for daily and medical cleaning. A typical form includes: a liquid pump, a cleaning rod, a cleaning fluid receiving part, and a return fluid channel; the liquid pump increases the pressure energy of the cleaning fluid, which forces the cleaning fluid to be sprayed out from a nozzle located at one end of the cleaning rod to clean the internal area of ​​the nasal cavity where the nozzle is located, and the cleaning fluid flows out from the corresponding nostril for return fluid; the edge of the cleaning fluid receiving part has a nostril sealing part to seal the gap between the cleaning fluid receiving part and the nostril, and the return fluid channel is connected to an exhaust device for controlling the negative pressure of the nasal cavity relative to the oral cavity, which causes the nasal cavity to have airflow from the oral cavity during cleaning to assist in the return fluid; the nozzle is located on the upper part of the cleaning rod and is located on the side or top of the cleaning rod, and the nozzle at the top has a spray angle greater than 90 degrees; the cleaning device includes an energy conversion drive device for realizing the composite motion control of the nozzle or other cleaning parts; the other cleaning parts are used for local cleaning of the internal area; the composite motion includes the movement of the projection point of the nozzle or other cleaning parts on the two-dimensional plane along any specified direction, the raising and lowering of the nozzle or other cleaning parts, and the rotation of the nozzle or other cleaning parts. During cleaning, the cleaning rod inside the nasal cavity has a preset shape and outer diameter to reduce irritation to the nasal cavity and to provide a flow passage for the nasal cavity.

[0008] The exhaust device discharges cleaning fluid and air, ensuring that the total flow rate of the return channel is greater than the total flow rate of the supply channel to control the negative pressure. An air inlet pipe can be installed on the return channel, equipped with a pressure relief device to draw in ambient air when the negative pressure exceeds a preset limit. The pump inlet can be connected to the return channel for circulating cleaning fluid.

[0009] Furthermore, a differential pressure sensor is connected to the space adjacent to the nostril in the return channel for adjusting the frequency of the exhaust device or the bypass control valve to achieve the control of the negative pressure; furthermore, the cleaning device includes an oral ventilation tube for connecting the oral cavity with ambient air.

[0010] Further, the other cleaning parts may be located on the cleaning rod, and the cleaning rod performs the composite movement; the other cleaning parts may be located on a cleaning rod other than the cleaning rod, and the cleaning rod performs the composite movement. Further, the energy conversion drive device includes multiple servo motors, which are located at the joints of the robotic arm and move the projection point on the two-dimensional plane along any specified direction by controlling the rotation of the joints. Further, the energy conversion drive device moves the projection point on the two-dimensional plane along any specified direction via an XY-axis slide. Further, the energy conversion drive device includes a motor for implementing the rotation control. Further, the energy conversion drive device includes a motor for implementing the lifting control. Further, the nozzle or other cleaning parts are controlled by a control circuit to perform reciprocating rotation within a preset angle range to clean local secretions.

[0011] Furthermore, the pressure forces the cleaning fluid to flow through a narrow section located in the cleaning rod. During cleaning, the narrow section, situated at the top of the cleaning rod, has a preset flow width to accelerate the cleaning fluid, facilitating atomization. The cleaning fluid is then sprayed out from the nozzle in an atomized state. The narrow section may include an internal channel adjacent to the nozzle. Further, a vortex chamber is provided in front of the narrow section, with a local inner diameter larger than the inner diameter of the narrow section. At least one tangential inlet is provided on the sidewall of the vortex chamber, causing the water flow to rotate around the nozzle axis. The contraction of the vortex chamber increases the rotational speed and facilitates atomization. Further, a mixing chamber is provided at the rear of the narrow section for mixing the atomized cleaning fluid with air. The cleaning fluid mixed with air is sprayed out through the nozzle at the rear. Further, a mixing chamber is provided in front of the narrow section, connected to multiple air inlet channels, allowing air to mix with the cleaning fluid to form multiple microbubbles for atomization. The cleaning fluid mixed with bubbles flows rapidly through the narrow section and is sprayed out from the nozzle in an atomized state.

[0012] Its typical form two includes: a liquid pump, a cleaning rod, a cleaning fluid receiving part, and a return fluid channel; the liquid pump increases the pressure energy of the cleaning fluid, which forces the cleaning fluid to be sprayed out from a nozzle located at one end of the cleaning rod to clean the internal area of ​​the nasal cavity where the nozzle is located, and the cleaning fluid flows out from the corresponding nostril for return; the edge of the cleaning fluid receiving part has a nostril sealing part to seal the gap between the cleaning fluid receiving part and the nostril, and the return fluid channel is connected to an exhaust device for controlling the negative pressure of the nasal cavity relative to the oral cavity; the negative pressure causes the nasal cavity to have airflow from the oral cavity to assist in the return fluid during cleaning; the nozzle is located on the upper part of the cleaning rod and is located on the side or top of the cleaning rod, and the nozzle at the top has a spray angle greater than 90 degrees; the cleaning device includes an energy conversion drive device for realizing the rotational control of the nozzle or other cleaning parts; the other cleaning parts are used for local cleaning of the internal area. During cleaning, the cleaning rod inside the nasal cavity has a preset shape and outer diameter to reduce irritation to the nasal cavity and to provide flow passage space in the nasal cavity.

[0013] The specific design method for nasal air pressure control in Typical Form Two can adopt the design method in Typical Form One. Furthermore, the other cleaning part is a friction cleaning part, which includes multiple elongated protrusions for cleaning local secretions. In Typical Form Two, the cleaning fluid can be sprayed out in an atomized form from the nozzle; the specific design method can adopt the design method in Typical Form One.

[0014] Furthermore, the other cleaning parts may be located on the cleaning rod, which can be driven by the energy conversion drive device to rotate the nozzle and other cleaning parts; the other cleaning parts may be located on a cleaning rod other than the cleaning rod, which can be driven by the energy conversion drive device to rotate the other cleaning parts. Furthermore, the energy conversion drive device is a motor. Furthermore, the liquid supply channel or return channel of the cleaning device has a sliding sealing element to prevent leakage of cleaning fluid during the rotation of the cleaning rod; the nozzle or other cleaning parts rotate freely relative to the cleaning fluid receiving part under the drive of the energy conversion drive device. Furthermore, the nozzle or other cleaning parts are controlled by a control circuit to reciprocate within a preset angle range to achieve localized cleaning of secretions. Furthermore, the nasal irrigation device also includes a lifting function for the nozzle or other cleaning parts.

[0015] Typical form three includes: a liquid pump, a cleaning rod, a cleaning fluid receiving section, and a return fluid channel; the liquid pump increases the pressure energy of the cleaning fluid, which forces the cleaning fluid to be sprayed out from a nozzle located at one end of the cleaning rod to clean the internal area of ​​the nasal cavity where the nozzle is located, and the cleaning fluid flows out from the corresponding nostril for return; the edge of the cleaning fluid receiving section has a nostril sealing section to seal the gap between the cleaning fluid receiving section and the nostril, and the return fluid channel is connected to an exhaust device for controlling the negative pressure of the nasal cavity relative to the oral cavity; the negative pressure causes airflow from the oral cavity to assist in the return fluid during cleaning; the nozzle is located on the upper part of the cleaning rod and is located on the side or top of the cleaning rod, with the top nozzle having a spray angle greater than 90 degrees; the cleaning fluid is sprayed out from the nozzle in an atomized state, so that the cleaning fluid particles fill all or part of the nasal cavity for cleaning, and the cleaning of the partially filled nasal cavity is assisted by the rotation or lifting of the cleaning rod. The specific design method of nasal air pressure control in typical form three can adopt the design method in typical form one. The specific design method for atomization in typical form three can adopt the design method in typical form one.

[0016] Its typical form four includes: a liquid pump, a liquid supply channel, a nozzle, a cleaning liquid receiving part, a return channel, and a friction rod; the liquid pump increases the pressure energy of the cleaning liquid, which forces the cleaning liquid to be sprayed out from the nozzle located at one end of the liquid supply channel to clean the internal area of ​​the nasal cavity where the nozzle is located, and the cleaning liquid flows out from the corresponding nostril for return; the nozzle has a spray angle of less than 90 degrees; the edge of the cleaning liquid receiving part has a nostril sealing part to seal the gap between the cleaning liquid receiving part and the nostril, and an exhaust device is connected in the return channel to control the negative pressure of the nasal cavity relative to the oral cavity; the top of the friction rod has a friction part for local cleaning of the internal area; the cleaning device includes an energy conversion drive device for realizing the compound motion control of the friction rod, the compound motion including the movement of the projection point of the friction rod on the two-dimensional plane along any specified direction, the raising and lowering of the friction rod, and the rotation of the friction rod. During cleaning, the rigid structure part of the lower part of the friction rod inside the nasal cavity has a preset shape and outer diameter to reduce irritation to the nasal cavity and to make the nasal cavity have a flow gap.

[0017] The specific design method for nasal air pressure control in Typical Form Four can adopt the design method in Typical Form One. In Typical Form Four, the cleaning fluid can be atomized and sprayed from the nozzle; the specific design method can also adopt the design method in Typical Form One. Further, the nozzle is located on the friction rod. Further, the friction part includes multiple elongated protrusions for friction cleaning. Further, in Typical Form Four, the specific design method for the compound motion of the friction rod can adopt the design method in Typical Form One.

[0018] This cleaning device utilizes full-pipe delivery and air pressure control, and its design of the cleaning section and drive unit enables highly efficient and comfortable cleaning of the nasal cavity under different conditions through top-down or bottom-up cleaning methods, making it widely applicable. Attached Figure Description

[0019] Figure 1 shows an example of nasal washing.

[0020] Figure 2 is a cross-sectional view of Example 1 of the cleaning rod.

[0021] Figure 3 is a cross-sectional view of Example 2 of the cleaning rod.

[0022] Figure 4 is a schematic diagram of the jet angle.

[0023] Figure 5 is a cross-sectional view of Example 2 of nose washing.

[0024] Figure 6 is a cross-sectional view of Example 3 of nose washing.

[0025] Figure 7 is a cross-sectional view of Example 4 of nose washing.

[0026] Figure 8 is a cross-sectional view of the upper part of the cleaning rod in Example 3 of the nasal washer.

[0027] Figure 9 is a cross-sectional view of the upper part of the cleaning rod in Example 4 of the nasal washer.

[0028] Figure 10 shows a detailed diagram of the nasal irrigation example 3, illustrating the fluid supply.

[0029] Figure 11 is a cross-sectional view of Example 5 of nose washing.

[0030] Figure 12 is a cross-sectional view of the friction device in Example 5 of nose washing.

[0031] Figure 13 is a detailed diagram of the friction area in Example 5 of nose washing.

[0032] Figure 14 is a cross-sectional view of Example 6 of nose washing.

[0033] Figure 15 is a cross-sectional view of Example 7 of nose washing.

[0034] Figure 16 is a cross-sectional view of Example 8 of nose washing.

[0035] Figure 17 is a detailed view of the rotating part in Example 8 of nose washing.

[0036] Figure 18 shows a detailed drawing of the slide in Example 9 of the nose washing demonstration.

[0037] Figure 19 is a cross-sectional view of Example 9 of nose washing.

[0038] Figure 20 shows Example 1 of the device.

[0039] Figure 21 shows device example 2.

[0040] Figure 22 shows device example 3.

[0041] Figure 23 shows device example 4.

[0042] Figure 24 is a cross-sectional view of Example 3 of the cleaning rod.

[0043] Figure 25 is a cross-sectional view of an example of an enhanced atomizing nozzle.

[0044] Figure 26 shows a three-dimensional view of the intermediate cone.

[0045] Figure 27 is a cross-sectional view of Example 1 of an air-assisted nozzle.

[0046] Figure 28 shows an application example of an air-assisted nozzle (Example 1).

[0047] Figure 29 shows an example of an air-assisted nozzle.

[0048] Figure 30 shows an example of a through-bar.

[0049] Figure 31 shows the cleaning rod in Example 10 of the nose washing method.

[0050] Figure 32 shows example 10 of nasal washing.

[0051] Figure 33 is a schematic diagram of the friction tilt angle.

[0052] Figure 34 is a schematic diagram of an example pneumatic motor.

[0053] Figure 35 is a schematic diagram of airflow. Detailed Implementation

[0054] The technical solutions in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0055] In this invention, the directions of "up" and "down" refer to the direction of the nasal cavity cleaning component during cleaning when the person's head is looking straight ahead.

[0056] The simplest form of the device in this invention includes a nozzle, a liquid supply channel, and a pressurizing device; the cleaning liquid is pressurized by the pressurizing device and sprayed out through the nozzle at one end of the liquid supply channel to clean the nasal cavity.

[0057] Example 1 of the device of the present invention is shown in Figure 20, which mainly includes a nasal irrigation tip 1, a liquid supply pipe 5, a liquid return pipe 6, a circulating cleaning tank 2, an exhaust fan 4, and a liquid supply pump 3. The device connects the liquid supply pump 3 to the nasal irrigation tip 1 through the liquid supply pipe, and connects the circulating cleaning tank 2 and the nasal irrigation tip 1 through the liquid return pipe 6. The device cleans the nasal cavity by circulating the cleaning liquid.

[0058] The nasal washer and cleaning rod design in the example is shown in Figure 1. It is a left nasal washer, including a cleaning rod 101, a cleaning chamber 103, a cleaning chamber connecting tube 104, a cleaning rod connecting tube 105, a nostril sealing edge 102, and a cleaning chamber filter 106. The cleaning rod connecting tube 105 decreases in diameter upwards and changes direction via an elbow, passing through the cleaning chamber connecting tube and connecting to the cleaning rod inside the cleaning chamber. The cleaning rod can be 2mm in diameter, decreasing to 1mm upwards, with a cleaning bend 10101 at the top. A small spray hole is provided at the end of the bend to allow the cleaning fluid to rinse from top to bottom. The cleaning rod is cylindrical, with nozzles 10102 around its perimeter to spray the cleaning fluid in all directions. The nozzles located at the top of the cleaning rod, with a downward velocity component, give the cleaning fluid greater downward kinetic energy for rinsing. Simultaneously, the nozzles located in the middle of the cleaning rod allow the cleaning fluid to be sprayed out in a mist to assist in cleaning. This design greatly improves cleaning efficiency. The cleaning chamber connecting tube 104 can be used as a handheld part.

[0059] The aforementioned cleaning rod is designed with an internal channel for conveying cleaning fluid. The cleaning fluid is sprayed out through a nozzle on one side of the internal channel to clean the nasal cavity. The nozzle can be designed with different spray angles. The cleaning rod can be understood as a rod-shaped component with cleaning nozzles and an internal channel. In this invention, the cleaning rod includes a downwardly extending solid portion without nozzles, and the cleaning rod can be made of a flexible material. Since the cleaning rod is surrounded by a receiving portion in the vertical direction, at least a portion of the cleaning rod is located inside the cleaning fluid receiving portion.

[0060] Even without the top rinsing hole, a sufficient number of spray holes around the cleaning rod can still achieve highly efficient cleaning. Calculations show that 20 small holes with a diameter of 0.1 mm can achieve a flow rate of over 30 ml / min. If these holes are arranged around the upper part of the cleaning rod, the returning cleaning fluid will simultaneously clean the lower half of the nasal cavity, which can meet some of the nasal cavity cleaning needs. The spray holes can be nozzles with straight channels to increase kinetic energy rinsing. In this invention, "nozzle located in the upper part of the cleaning rod" means that the nozzle is located at the top of the cleaning rod or in the upper half of the portion of the cleaning rod located inside the nasal cavity; "lower part of the cleaning rod" refers to the portion other than the upper half; the distinction between the upper and lower parts of the cleaning rod is the same as described above.

[0061] The aforementioned micro-space cleaning, combined with a full-tube liquid supply design, enhances cleaning kinetic energy and effectiveness. Compared to mist flow delivery, this design achieves a higher liquid supply volume in atomized state at the same total flow rate. The top-down spraying applies kinetic energy to nasal secretions, improving separation efficiency. The cleaning fluid, passing through pre-designed channels and nozzles, is broken into numerous small droplets with an average diameter of less than 40µm. Atomization facilitates the use of smaller cleaning fluid flow rates and improves cleaning comfort, and in some cases, it can increase the adhesion time or concentration of the cleaning fluid in various parts of the nasal cavity. The atomized particles have a low settling velocity and easily flow with the airflow; with appropriate nasal negative pressure design, the particles do not enter deep into the nasal cavity, resulting in better comfort. Larger or higher-speed atomized droplets provide a certain flushing kinetic energy during localized cleaning and can be used as needed.

[0062] In this invention, the cleaning rod has a significantly reduced diameter compared to conventional designs, greatly improving its applicability in situations with abundant nasal secretions. Preferably, the maximum outer diameter of the cleaning rod within the nasal cavity is less than half the equivalent diameter of the nostril, more preferably less than one-third of the equivalent diameter. Preferably, the nozzle distance from the nasal hairs at the nostril initiation point is at least one-third greater than the length of the nasal cavity where nasal hairs grow, to ensure sufficient flushing height. The outer diameter refers to the envelope diameter of each cross-section of the outer contour. The small cross-section cleaning rod combined with the pressurizing device of the high-pressure head enables highly efficient cleaning of the micro-spaces of the nostrils, while leaving sufficient space for the return fluid to flow out from the corresponding nostril. In use, the thinner diameter nasal cleaning rod can penetrate deep into the nasal cavity while reducing irritation; it can also pass through the limited gaps formed by clumps of nasal secretions. In this invention, the equivalent diameter refers to the diameter of a circle with a cross-sectional area equal to the area of ​​its cross-section.

[0063] The inlet of a person's nostril is typically elliptical, with the long axis of an adult's nostril being approximately 10mm. Preferably, the maximum outer diameter of the nasal irrigation rod located within the nasal cavity is less than or equal to 5mm, more preferably less than or equal to 3.5mm. A thin-diameter nasal irrigation rod can penetrate deep into the nasal cavity while minimizing irritation; when nasal secretions accumulate, the irrigation rod can pass through the limited gaps created by the accumulation. In this text, the outer diameter refers to the envelope diameter of the outer contour of each cross-section of the component, not the overall envelope diameter.

[0064] The cleaning rod can take various shapes, such as a shower head, so that the cleaning fluid has a downward velocity component when passing through the nozzle; or nozzles can be drilled around the rod, and the channel in front of the nozzle can be inclined, so that the cleaning fluid has a downward velocity component. Figures 2 and 3 show examples 1 and 2 of the cleaning rod. As shown in Figure 2, the cylindrical cleaning rod has several internal channels 10103 around its perimeter, which are connected to the internal main channel 10104. The internal channels 10103 have a preset spray angle greater than 90 degrees; a stainless steel tube can be drilled and one end welded closed. The internal main channel 10104 of the cleaning rod connects to each nozzle and is also an internal channel. As shown in Figure 3, the upper part of the cylindrical cleaning rod has a shower head 10105, which has an internal channel 10103, and the internal channel 10103 also has a preset spray angle greater than 90 degrees. Taking the cleaning rod in Figure 3 as an example, and referring to Figure 4, the definition of the spray angle is as follows: Near the corresponding nozzle of the first internal channel 10103a of the shower head, the angle between the velocity direction V of the cleaning fluid during flow and the upward Z direction along the cleaning rod is α, where α is the spray angle; it can also be considered that the nozzle has a spray angle of α; the angle α is the minimum rotation angle from the Z direction to the V direction. During manufacturing, the top of the shower head can be milled with a milling cutter based on a solid truncated cone to obtain the internal channel 10103, and then the countersunk hole can be welded closed with a circular thin plate; the shape of the shower head is not limited to that shown in the figure, and various processing techniques can be used. For the enhanced spray nozzle module in Figure 25, the nozzle has a large spray cone angle. When it is installed laterally, the nozzle has a spray angle greater than 90 degrees, equal to 90 degrees, and less than 90 degrees. In two-phase flow cleaning, if a single nozzle sprays an air-assisted two-phase flow, the internal channel corresponding to the single nozzle includes an internal air channel and an internal liquid channel. The spray angle of the nozzle is determined by the internal channel that dominates the spray direction. For example, the air-assisted nozzle modules in Figures 27 and 29 have a large spray cone angle. When installed laterally, the nozzle has a spray angle greater than 90 degrees, equal to 90 degrees, and less than 90 degrees.

[0065] When the cleaning fluid is ejected from a straight channel, the cylindrical jet is affected by its own turbulence, velocity distribution, surface tension, and air interference, and breaks up and atomizes after a certain distance; this distance can be called the fragmentation distance. When the cylindrical jet is struck by a nasal hair, it will accelerate its further atomization. Under low-speed conditions, the diameter of the atomized particles at the cylindrical jet outlet is generally less than twice the inner diameter of the channel due to tension. Therefore, smaller atomized particles can be obtained by reducing the inner diameter of the nozzle channel. For example, when the cleaning fluid is ejected from a nozzle with a 20µm straight channel, it rapidly breaks up into droplets of 40µm and below at low speed. In smaller internal channels, the cleaning fluid is generally in a laminar flow state with a low Reynolds number. At this point, the velocity distribution across the cross-section of the internal channel is parabolic, with zero velocity at the pipe wall. This significant velocity non-uniformity makes the cleaning fluid more prone to breakup at the nozzle due to tension, resulting in a shorter breakup distance compared to turbulent flow. The breakup distance decreases as the inner diameter of the internal channel decreases. Due to the low Reynolds number, the length of the internal channel (i.e., the flow length) does not significantly affect the breakup distance. When the nozzle is a cutting edge or the corresponding internal channel has a very small length-to-diameter ratio, the relatively uniform velocity of the outflowing cleaning fluid will increase the breakup distance, but the outflow will still break up and atomize quickly due to capillary instability. Therefore, using small-sized internal channels or nozzles results in high atomization efficiency. Taking a 20µm straight-channel nozzle as an example, theoretical calculations show that at an outflow velocity of 2 m / s, the breakup distance of water at room temperature is only about 0.07 mm; this breakup distance is sufficient for nasal atomization cleaning. The development of modern laser processing and mechanical micromachining technologies has enabled the efficient processing of holes of 20µm or smaller. This allows for the formation of a large cleaning flow rate and coverage area by densely distributing 20µm nozzles on a cleaning rod. Under conditions of multiple densely distributed micro-holes, the air turbulence caused by each jet is enhanced, which can reduce the atomized particle size and increase the spray cone angle to a certain extent.

[0066] The circular straight channel adjacent to the nozzle can actually be formed into various tiny through-holes using other cross-sectional shapes; similar atomization effects can also be achieved by using a slit with a relatively small flow width and a certain roughness and flow length; for example, a flow width of 20 μm or less can be formed by laser ablation. Preferably, a fan-shaped slit with a certain fan angle can be used; for example, the slit is located on the horizontal plane of the cleaning rod, and the arc length of the inner wall is smaller than the arc length of the outer wall. When the cleaning fluid is sprayed out from the fan-shaped slit, based on the continuity theorem, the liquid film undergoes surface contraction within the slit, rapidly forming tiny liquid line fragments near the nozzle, thus atomizing the cleaning fluid in advance; a relatively small fragmentation distance can be obtained at this time. The cleaning rod can be designed with one or more slits; it can be located axially or radially; and cleaning can be assisted by rotation or lifting.

[0067] In this invention, the nozzle refers to the opening on the outer wall surface of the cleaning rod tube; the nozzle used for atomization and the internal channel located on the tube wall adjacent to the nozzle are both considered narrow sections; when the internal channel of the tube wall is conical, causing the internal channel to converge at the nozzle to form a cutting edge, the nozzle itself is a narrow section. The narrow section can also employ various other designs; for example, using a higher roughness design for the straight channel in front of the nozzle will increase the turbulence of the cleaning fluid flow, thus increasing the atomization effect; using a spiral groove design for the internal channel with a larger diameter to increase turbulence; or using an intermediate cone design for the internal channel of a larger nozzle, forming a narrow flow channel around or inside the cone.

[0068] A single nozzle can be designed for enhanced spraying as shown in Figures 25 and 26. Figure 25 shows a cross-sectional view of a single nozzle module along the side groove; it is a cylindrical structure, machined on a CNC machine tool using copper or stainless steel. The diameter D can be designed to be 0.3 mm, and the height H to be 0.2 mm; the inner diameter d of the straight channel adjacent to nozzle 10102 can be designed to be 0.04 mm. During machining, a circular inner cavity and a constriction section can be formed inside the cylinder using a micro-milling cutter or laser. The inner diameter D1 can be 0.2 mm. Then, a micro-drill is used to machine the nozzle, ultimately forming the nozzle body 10108. The intermediate cone 10109 can be machined on the basis of a cylinder with an outer diameter slightly less than 0.2 mm, and then fixed to the nozzle body by adhesive bonding. Three side grooves 10110 can be machined on the side of the intermediate cone using ultrafast laser processing technology, with a width and depth of 20μm. Then, three end face grooves 10111 are machined on the end face in the same manner. The end face grooves connect with the side grooves to form a jet channel. The three end face grooves are arranged in a 120-degree angular array and are tangentially connected to the circular blind hole 10112. After the intermediate cone is placed into the main body, the circular blind hole and the constriction section 10113 in the nozzle body together form a cavity. The three jets cause the cleaning fluid to rotate at high speed around the nozzle axis within the cavity, forming a vortex. The cleaning fluid accelerates and rotates on the constriction side, then passes through a straight channel with diameter d and is ejected from the nozzle in an atomized state. This cavity can also be called a vortex cavity. This design gives the cleaning fluid a high tangential velocity component, resulting in better atomization performance and a larger jet cone angle at high flow rates compared to a simple direct nozzle. A small hole with a positive deviation of 0.3mm can be drilled at the top of the cleaning rod, and the aforementioned nozzle module can be fixed therein by adhesive or welding to form a cleaning rod that sprays downwards. In engineering, the shape or number of the jet channel at the front of the vortex cavity, i.e., the end face groove, and the size of the vortex cavity can be optimized to obtain better atomization performance.

[0069] In the above design, the local inner diameter of the vortex cavity is larger than the inner diameter of the rear narrow section and the nozzle, where the inner diameter is the equivalent diameter. The straight channel with diameter d acts as the narrow section to accelerate the cleaning fluid; its length is generally designed to be short to form a large jet cone angle and improve atomization. The length of the straight channel with diameter d can be zero, making the nozzle a cutting edge, in which case the nozzle is the narrow section. A smaller d value and vortex cavity size can achieve a smaller atomization flow rate and smaller atomized particles, which can be optimized through experiments. In actual design, the shape of the vortex cavity and the nozzle size can be determined through experimental optimization.

[0070] The design of the aforementioned vortex cavity can be summarized as follows: a vortex cavity is designed in front of the narrow section, and the local inner diameter of the vortex cavity is larger than the inner diameter of the narrow section; at least one tangential inlet is provided on the side wall of the vortex cavity, causing the water flow to rotate around the nozzle axis; the contraction of the vortex cavity increases the rotational speed and facilitates atomization. In this invention, the front and rear of the components in the liquid supply channel are determined based on the flow direction, which is from front to back.

[0071] The aforementioned narrow section design employs a small flow width. Pressure forces the cleaning fluid to flow through the narrow section located within the cleaning rod. The narrow section accelerates the cleaning fluid, facilitating atomization, and the cleaning fluid is then sprayed out from the nozzle in an atomized state. The cleaning fluid can be a bubble-free liquid phase flow; alternatively, the cleaning fluid can contain bubbles, approaching a full-pipe state. In this invention, the flow width refers to the smaller flow dimension in the flow cross-section. For example, in a circular internal channel, the diameter is the flow width; in a rectangular internal channel, the smaller side length is the flow width. Relevant theoretical calculations show that a straight-channel nozzle with a 0.1mm orifice produces most water mist particles smaller than 0.2mm. Preferably, the flow width of the narrow section of the cleaning device is less than or equal to 0.1mm; or preferably less than or equal to 50µm; or preferably less than or equal to 20µm.

[0072] In the example, the primary function of the cleaning chamber is to receive the returned liquid. It has nasal sealing edges welded around its perimeter and a connecting pipe welded to the bottom. The sealing edges fit snugly against the edge of the nostril, creating a partially enclosed space between the cleaning chamber and the nasal cavity. This effectively prevents leakage of the cleaning liquid and allows for effective control of nasal air pressure. Simultaneously, it works in conjunction with the pressurization device in the return liquid channel to suction the cleaning liquid from the nasal cavity, preventing it from flowing into the mouth. Other sealing designs can be used for the nasal sealing edges, such as solid blocks or shielding the gap between the return channel and the nostril.

[0073] In the example, the filter screen of the cleaning chamber is welded to the cleaning chamber, and the overall structure is slightly concave. Its function is to filter out fallen secretions and prevent them from clogging the pipes. The secretions can be manually removed from the filter screen during the cleaning process to prevent them from dissolving in the cleaning solution and reducing the attenuation of the effective components of the cleaning solution. In the example, the inner diameter of the cleaning chamber connecting pipe is 8mm, and the inner diameter of the lower part of the liquid supply connecting pipe is 4mm.

[0074] The shape and size of the nasal irrigation chamber can be customized to suit different nasal cavity sizes, and the channel size of the nasal irrigation tip can be optimized according to the flow rate. The irrigation chamber and related connecting pipes can be made of stainless steel sheet and stainless steel tube, but various types of rigid materials can be used in practice.

[0075] The cleaning solution used can be physiological saline, trypsin solution, or hyaluronidase solution. Trypsin can selectively hydrolyze mucin, breaking some peptide bonds in the mucin to form smaller polypeptide chains or amino acids. Experiments have shown that trypsin solution has a significant dissolving effect on the mucin component in scabs; the effect is enhanced when it is dissolved in medical saline. By selecting a suitable cleaning solution and controlling the solution temperature and concentration, the device can effectively remove hard scabs.

[0076] In Example 1, the circulating cleaning tank 2 consists of a circulating cleaning tank body 201 and a circulating cleaning tank cover 202. The lower part of the circulating cleaning tank body is equipped with a circulation interface and a liquid supply pump inlet 302 connected via a pipe. The liquid supply pump outlet 301 is connected via a liquid supply pipe and a cleaning rod connecting pipe. The upper part of the circulating cleaning tank body is equipped with a return liquid port, connected to the cleaning chamber connecting pipe via a return liquid pipe. The liquid pump circulates the cleaning liquid for cleaning. An exhaust fan 4 is fixedly installed on the upper part of the circulating cleaning tank cover. The exhaust fan inlet 401 is connected via a pipe and an exhaust port 403; the exhaust fan outlet 402 is open to the atmosphere.

[0077] The circulating cleaning chamber and its cover are sealed together to form a closed space. The exhaust fan in Example 1 is optional; when no exhaust fan is designed, the exhaust port can be blocked, in which case the supply and return flow rates are equal, and the cleaning fluid is less likely to enter the oral cavity.

[0078] In Example 1, the upper part of the circulating cleaning box is filled with air. An exhaust fan controls the ventilation volume, allowing precise control of the flow rate in the return liquid channel. The exhaust fan can be designed with a maximum flow rate to ensure safe operation. Generally, the exhaust fan flow rate can be preset, and a variable frequency design or valve adjustment can be used to ensure it operates at the preset airflow, maintaining a constant difference between the flow rates in the supply and return liquid channels, thus guaranteeing safe operation of the nasal cavity. The fan in Example 1 can be equipped with a one-way valve to prevent fan malfunction from significantly affecting nasal air pressure.

[0079] Example 2 of the device is shown in Figure 21. The design of the nasal irrigation tip is the same as in Example 1. The supply and return tanks are designed as separate units, with a supply tank 8 and a return tank 7, effectively controlling the nasal air pressure. The supply tank does not need to be sealed. In this example, the supply tank consists of a supply tank body 801 and a supply tank cover 802. A vent is provided on the upper part of the supply tank cover and connected to a vent bend 803 to prevent contamination. The return tank uses a combination design of a return tank body 701 and a return tank cover 702. The exhaust fan is located on the upper part of the return tank cover, and its structural design can be consistent with the aforementioned design. In the design, a flow sensor can be incorporated into the supply pipeline, and the controller collects the signal to control the frequency of the exhaust fan, thereby further controlling the nasal air pressure. The pump and exhaust fan can be linked in the design, automatically stopping the pump when the exhaust fan fails. The commonality between Examples 1 and 2 is that the difference between the return and supply liquid channels is controlled by adjusting the exhaust volume of the return channel. This makes the flow rate of the gas-liquid mixture in the return channel easier to control. A differential pressure sensor can also be connected to the air-filled space adjacent to the nostrils in the return channel for negative pressure control. For example, a differential pressure probe can be installed in the cleaning chamber of a nasal irrigator. The operator can open their mouth so that the oral pressure is slightly equal to the ambient pressure, and the pressure difference between the cleaning chamber and the environment can be collected. This pressure difference is slightly equal to the negative pressure of the nasal cavity relative to the oral cavity. This negative pressure serves as feedback to control the frequency or flow rate of the exhaust fan, and can also control the bypass control valve.

[0080] The exhaust fan in the above scheme can be a centrifugal fan or a positive displacement air pump. Positive displacement air pumps have lower low-frequency control performance; therefore, a bypass ventilator with a certain resistance coefficient can be designed in the return liquid channel to achieve negative pressure control. When the nose is congested, air is drawn in through the bypass ventilator to prevent the negative pressure from exceeding the limit. Various safety pressure relief devices can also be installed on the bypass ventilator, which open to draw in ambient air when the negative pressure exceeds a preset limit. Specifically, the magnetic suction design in CN 210770476 U can be adopted, using a micro-sized design to achieve safe pressure relief. The pressure relief plate can be spring-assisted for reset.

[0081] The common feature of the above solutions is the installation of an exhaust device in the return liquid channel to discharge air into the environment for negative pressure control. Alternatively, instead of an exhaust fan, a dual-purpose diaphragm or rotary vane pump can be designed directly on the return liquid pipeline. By controlling its frequency or flow rate, the total flow rate of cleaning fluid and air in the return liquid channel is made greater than the total flow rate in the supply liquid channel, thus achieving negative pressure control. In this case, a bypass vent pipe and a safety pressure relief device can be installed in the return liquid channel to protect against high negative pressure and ensure safety and comfort. An open return liquid tank can be installed at one end of the pump for collection, and the cleaning fluid can be pumped back into the nasal cavity for cleaning by the supply pump. The dual-purpose gas-liquid pump can also be a self-priming centrifugal pump, an ejector pump, etc.

[0082] Under nasal congestion, the above solution is not convenient for stable control of negative pressure. According to experimental results, the negative pressure when the nasal vestibule is slightly deformed is about 200 Pa. Based on this negative pressure limit, there are several design solutions. One solution is to add an exhaust port 403 to the nasal irrigator and utilize the characteristic of the centrifugal fan to stably control the total pressure at low frequency and low flow. In this case, the exhaust port can be connected to the centrifugal fan through a thin tube, or a miniature centrifugal fan can be fixed to the nasal irrigator. In this case, the nasal cavity negative pressure can be controlled by controlling the operating frequency through the negative pressure feedback of the cleaning chamber or by the fan operating at a preset frequency. As shown in Figure 32, the cleaning chamber has an exhaust port 403, and an exhaust fan 4 is installed on the side. It is a miniature turbine centrifugal fan with dimensions of 20*20*6mm. A baffle is installed near the exhaust port to prevent liquid droplets. In actual design, a demister can be added, such as a wire mesh demister or fiber demister commonly used in washing towers. The cleaning chamber is connected to a bypass vent pipe 132 and a bypass control valve 133, which introduces ambient air into the bypass vent 1321 to control the negative pressure in the nasal cavity in conjunction with the exhaust fan 4. The bypass control valve can be a butterfly valve, controlled by a miniature stepper motor 118. The vortex centrifugal fan can be turned on when the nose is blocked, operating at a preset frequency or at a certain opening of the bypass control valve 133 to achieve stable control of the local negative pressure in the nasal cavity. A check valve can be installed at the outlet of the turbine centrifugal fan to prevent backflow. The bypass vent pipe 132 and the bypass control valve 133 are used to eliminate possible surge of the centrifugal fan near zero flow and to increase the negative pressure regulation performance. The exhaust device design on the cleaning chamber achieves stable negative pressure control even when there is no airflow from the mouth to the nasal cavity. This exhaust device can work in conjunction with the pressurization device on the return liquid channel, with the latter providing the return liquid power and the former responsible for auxiliary negative pressure control. The exhaust device on the cleaning head is preferably used in conjunction with the circulating cleaning scheme in Example 1, where it can replace the exhaust fan of the circulating cleaning box. The exhaust device in the cleaning chamber can also work in conjunction with the exhaust fan of the circulating cleaning box, with the latter providing high-flow exhaust. In actual manufacturing, a volumetric air pump can be used instead of a turbine centrifugal fan. In this case, the pipe length between the air pump and the exhaust port 403 can be increased, and a bypass vent pipe can be connected in the pipe to improve the pressure characteristics at low flow rates. In this case, the bypass vent pipe on the right side can be eliminated.

[0083] The supply and return tubing in this device can be made of flexible tubing with sufficient pressure resistance to ensure ease of operation. For example, silicone tubing with braided reinforcement can be used. The supply and return tubing can also be made of soft materials such as silicone or PU for ease of operation. A metal sheath design can be used to ensure the supply tubing has sufficient pressure resistance.

[0084] High-precision filters are generally used in the liquid supply line to prevent particles from clogging the nasal irrigation tip. Melt-blown filter cartridges, made from polypropylene particles through heating, melting, spinning, drawing, and receiving, can be used; pleated filter cartridges are also acceptable. The filter material can also be made of materials with low protease adsorption, such as PES (polyethersulfone) or PTFE. Specifically, a sand filter can be installed before the high-precision filter. The quartz sand particle size can be selected from 0.5 to 1.2 mm. The sand filter will pre-filter incompletely hydrolyzed clumps of secretions, preventing clogging of the high-precision filter. The sand filter can be designed with multiple disposable tanks for easy use. Smaller disposable bag filters, such as nylon or PET filter bags, with a precision of 50-100 μm, can also be used for pre-filtration of the return liquid. This can be adopted in compact handheld devices through optimized space design. Adding NaCl to the cleaning solution can reduce electrostatic adsorption, thereby further reducing protease adsorption loss; or adding stabilizers can stabilize the protease structure and reduce adsorption.

[0085] Because the circulating cleaning tank adopts a circulating liquid supply and return design, it can store a relatively small amount of cleaning liquid and adopt a relatively small size design; the liquid supply tank and return tank can adopt a relatively large size design.

[0086] Since the aforementioned dissolving enzyme solution exhibits optimal dissolving effect at a specific temperature, the circulating cleaning tank or supply tank can be equipped with an electric heater, employing a constant temperature control design to regulate the cleaning solution temperature. Furthermore, because the nasal irrigator and the circulating cleaning tank are connected by a flexible hose, the temperature of the cleaning solution decreases; therefore, an electric heater can be incorporated into the nasal irrigator to ensure the temperature of the cleaning solution entering the nasal cavity.

[0087] In this invention, pumps and fans, as well as other devices that exert pressure on cleaning fluid, supply air, return air, and return liquid to increase their total pressure, can all be collectively referred to as pressurization devices. Pressurization devices include manually operated, squeezed bladders; pressurization devices often use impeller rotation to generate centrifugal force to pressurize fluids or increase the volume of components, forming various liquid pumps, fans, and air pumps, preferably electrically driven; pressurization devices can also be driven by compressed air or pressurized liquid. In the example, the supply pump increases the pressure energy of the cleaning fluid, which forces the cleaning fluid to be ejected from a nozzle located at one end of the cleaning rod, fundamentally different from pneumatic delivery methods; the liquid pump can be a medical-grade micro-centrifugal pump, micro-diaphragm pump, plunger pump, piston pump, etc., and the aforementioned micro-pumps allow for a lightweight, handheld device design; when the cleaning rod works in conjunction with the plunger pump, it can generate a high-frequency pulsed water flow of 1200–1600 times / minute, which is preferred. If ultrasonic atomization or compressed air atomization is used, the pressurization device can be a miniature centrifugal fan, a diaphragm pump, a rotary vane pump, etc. In this invention, the exhaust device refers to the pressurization device acting on the gaseous fluid for exhaust; various forms of miniature centrifugal fans, diaphragm pumps, rotary vane pumps, piston pumps, etc. can be used; the pump can be a dual-purpose gas-liquid pump, simultaneously discharging cleaning fluid.

[0088] In this invention, the channel through which the cleaning fluid flows from the outlet of the pressurizing device to one end of the cleaning rod can be collectively referred to as the fluid supply channel, including components such as the fluid supply pipe, the cleaning rod connecting pipe, and a filter. The fluid supply channel also includes the internal channel of the cleaning rod. The channel through which the cleaning fluid flows back from the nasal cavity to the collection device can be collectively referred to as the return fluid channel, including a cleaning receiving section, a return fluid pipe, and a return fluid tank. The fluid in the return fluid channel has different forms at different cross-sections; in the initial section, it may be a mixture of cleaning fluid and air. The total flow rate of the return fluid channel in the initial section includes the sum of the return air flow rate and the cleaning fluid flow rate. In this invention, "return fluid" generally refers to the process of circulating the cleaning fluid back to the collection device or the process of the cleaning fluid flowing from the nasal cavity to the collection device.

[0089] When the device uses compressed air-induced spray or ultrasonic atomization for two-phase flow cleaning, the flow rate of the nozzle is greater than the flow rate of the cleaning fluid. The air pressurization device is connected to the cleaning rod through the air supply channel, pressurizes the air and sprays it out from the nozzle located on the side or top of the cleaning rod. The single-phase liquid supply channel is connected to the air supply channel, which mixes the gas and liquid to form an atomized two-phase flow. The air supply channel from the connection point to the nozzle contains the cleaning fluid, and this section of the air supply channel can also be regarded as the liquid supply channel. In two-phase flow cleaning, the cleaning chamber and the return channel contain the cleaning fluid, and are similarly regarded as the liquid return channel.

[0090] In summary, the cleaning device of this invention can achieve stable control of the air pressure in the nasal cavity relative to the oral cavity through design. The air pressure control function can be achieved by connecting the liquid supply channel and the liquid return channel to the same pressurizing device. At this time, the air pressure in the nasal cavity and the oral cavity are basically equal, making it difficult for the cleaning fluid to enter the oral cavity. An exhaust device can be designed for the liquid return channel, which operates at a preset frequency or in conjunction with a bypass ventilator.

[0091] The devices in Examples 1 and 2 allow air to enter through the mouth or the other nostril during cleaning, enabling cleaning under negative pressure. A hollow tube can also be designed to enhance comfort. As shown in Figure 35, during negative pressure cleaning, the person performing the cleaning can bite down on the hollow tube 20, allowing air to enter the oral cavity through the tube. The person can control the soft palate 21 to droop, and the airflow 22 enters the nasal vestibule through the nasopharynx and then the cleaning chamber and return channel. The hollow tube significantly reduces the possibility of positive pressure in the nasal cavity relative to the oral cavity caused by breathing when the mouth is closed, and also reduces the possibility of inhaling cleaning fluid. During top-to-bottom cleaning, the direction of fluid return is consistent with the direction of air return, and the airflow assists in fluid return and improves the cleaning effect. The hollow tube can be ergonomically designed to enhance comfort.

[0092] The total flow rate of the cleaning fluid and air entering the nasal cavity can be controlled within a certain limit, such as 20 ml / min, improving safety and comfort. In adverse conditions where the pressurization device in the return channel fails, the low total flow rate allows the operator sufficient reaction time to stop the fluid supply and prevent liquid from entering the oral cavity. When used in conjunction with hollow tube ventilation for negative pressure cleaning, the airflow velocity from the oral cavity to the nasal cavity can be controlled at approximately 1 m / s, corresponding to flow rates of 500–3000 ml / min for different nasal cavity sizes. At this point, the airflow rate for return is much greater than the cleaning fluid flow rate, and cleaning fluid sprayed at a slightly less than 90-degree spray angle will not enter the oral cavity. The higher airflow velocity is more conducive to the separation of secretions and fluid return, and provides high safety. A pressure sensor can be added to measure the pressure difference between the oral cavity and the receiving unit as a fault stop signal for the pressurization device in the return channel.

[0093] The thinner nasal irrigation rod features a rinsing nozzle that, combined with the rotating and lifting design described below, allows for targeted cleaning of secretions. As shown in Example 2 of Figure 5, the cleaning rod 101 extends downwards and connects to a hollow circular rotating cavity 108, forming a single, side-sealed unit. The rotating cavity is made of thin-walled stainless steel with an outer diameter of 8mm. While delivering the cleaning fluid, the rotating cavity rotates to drive the cleaning rod for cleaning. The rotating cavity is confined within the first bearing chamber 110 and the second bearing chamber 111 by the first bearing 122 and the second bearing 121, respectively. The first bearing chamber 110, the second bearing chamber 111, the cleaning chamber 103, the first sealing chamber 109, the second sealing chamber 112, and the fluid supply connection chamber 113 all have the same cross-sectional shape and are connected sequentially by flanges and bolts 114 to form a single unit. Each chamber is constructed primarily of stainless steel or aluminum tubing with an outer diameter of 25mm and a wall thickness of 1mm. In practical designs, the various cavities can employ other detachable connection methods, such as threaded connections or socket connections; each compartment can be made of engineering plastics or other materials. Ordinary stainless steel deep groove bearings can be used, or sliding bearings can be used to reduce weight.

[0094] Furthermore, a friction cleaning component can be added to the nasal irrigation device, as shown in Figure 5, where a friction part is added to one side of the cleaning rod. The friction part 10700 is composed of several soft fibers and designed with different lengths according to the shape of the nasal cavity, and is fixed to one side of the cleaning rod. In actual design, the friction part can be designed as a modular component, allowing it to be removed from the cleaning rod. When the friction part needs to be replaced during the cleaning process, it can be replaced with a new friction part.

[0095] The cleaning chamber 103 has a local diameter change and is connected to the nasal sealing edge 102. The shape of the cleaning chamber 103 can be optimized according to the shape of the area near the human nasal cavity. The cleaning chamber can be connected to the first sealing chamber 109 by threads. When the nasal cavity is cleaned, the cleaning chamber can be quickly disassembled and its interior can be manually cleaned.

[0096] The cleaning chamber is connected to the cleaning chamber connecting pipe 104 on the side, and the liquid supply connecting chamber is provided with the cleaning rod connecting pipe 105 at the bottom. Both are designed with pagoda-type interfaces and can be connected with hoses using clamps.

[0097] A filter screen 106 is fixedly welded to the middle of the internal cleaning chamber, with a circular gap reserved for the rotating cavity to pass through during installation. The filter screen can be made of a metal frame with a certain strength and a wire mesh design. The metal frame can be welded and fixed to the cleaning chamber 103. For ultra-small and compact nasal cleaning devices, the filter screen can be designed as a rotatable filter screen with multiple flow channels. The filter screen frame is equipped with a gear set, and a manual or automatic rotating shaft is set at the point where it passes through the cleaning chamber. This allows the filter screen to rotate when the resistance is too high, so that the filter screen always maintains low resistance and isolates residual secretions in the filter screen, thereby achieving a lower substrate concentration in the cleaning system and improving cleaning efficiency.

[0098] The sealing of the rotating shaft in the first and second sealing chambers is based on the design of a water pump seal. The sealing assembly 115 includes a pressure ring 1151, a set screw 1152, a spring 1153, a rotating ring seal 1154, a rotating ring 1155, a stationary ring 1156, and a stationary ring seal 1157. Due to the low rotational speed of the rotating chamber, conventional sealing surface materials can be used for the rotating and stationary ring sealing surfaces.

[0099] In this example, the rotating cavity uses a POM gear transmission. The first gear 116 is fixed to the rotating cavity and meshes with the second gear 117, which is fixed to the output shaft of the stepper motor. The stepper motor 118 is a two-phase excitation micro stepper motor with a built-in reducer, an output shaft step angle of 0.436 degrees, and a voltage of DC 2-5V. A portion of the first bearing housing is designed as a plane, i.e., the motor mounting surface 119 is used to fix the stepper motor; a rectangular hole 120 is partially drilled in the second bearing housing for gear meshing and transmission.

[0100] The stepper motor's speed and direction can be controlled by the circuitry in the control device. Start and stop buttons can be designed on the nasal washer head, and a rotary button for stepper speed adjustment can be used for convenient operation. Alternatively, the nasal washer head can be designed without a motor, allowing manual rotation of gears for nasal irrigation; other types of motors can be used, such as the frameless servo motor described below.

[0101] In this invention, the cleaning chamber in the nasal irrigator is mainly used for receiving the cleaning fluid, and can also be called the cleaning fluid receiving part; the sealing edge serves as the nasal sealing part, and can be made of soft material or other designs to seal the gap between the cleaning fluid receiving part and the nasal cavity.

[0102] The two cleaning rod designs in the example employ a rotatable design, significantly improving cleaning efficiency and practicality. For safety reasons, the flow rate is preferably lower than a specific value during nasal irrigation; in areas with limited nozzles, the cleaning fluid may not spread evenly, which can be improved by rotation; the rotation design allows for a lower fluid supply flow rate of less than 5 ml / min, resulting in higher comfort and safety during cleaning; furthermore, the rotation operation allows for targeted cleaning of large secretions using a higher outflow velocity, which can be combined with water temperature control.

[0103] Furthermore, the friction element significantly improves cleaning efficiency and practicality. While softening nasal secretions, the friction element acts on nasal hairs to accelerate the separation and removal of these secretions. The friction element can be optimized using brushes of different shapes and materials; it is not limited to a brush form and can even utilize solid components. The friction element can be composed of multiple thin polypropylene or nylon fibers, with a single fiber's bending stiffness designed to be 0.1 mN·mm. 2 Material selection can be made from memory-rebound materials such as PBT; material selection, outer diameter, and length optimization can be achieved through nasal cavity tactile testing. The fibers, as slender protrusions, can be positioned around the nozzle without obstructing the outlet, allowing the cleaning fluid to flow out along the slender protrusions for convenient localized cleaning of secretions.

[0104] The aforementioned rotating chamber design utilizes a dynamic ring, a stationary ring, and a sealing chamber to isolate the cleaning fluid, allowing the transmission components to operate under dry conditions while simultaneously enabling the cleaning rod to rotate freely. The pair of dynamic and stationary rings in the first sealing chamber, referred to as the receiving rotating seal, rotatably seals the cleaning rod to the return fluid channel; the pair of dynamic and stationary rings in the second sealing chamber, referred to as the supply rotating seal, rotatably seals the cleaning rod to the supply fluid channel. In this invention, various sealing parts used for the rotation or lifting of the cleaning rod achieve dynamic sealing, which can be simply referred to as a dynamic sealing structure containing sliding sealing material, including the receiving rotating seal and the supply rotating seal in the above example. The molded sliding sealing material includes O-rings, Glyd rings, and sealing pairs from mechanical seals, referred to as sliding sealing elements. In this invention, the sliding sealing elements are mainly used to prevent leakage of the cleaning fluid during the rotation or lifting of the cleaning rod. Sliding sealing elements include, but are not limited to: an annular elastic sealing body that slides radially in contact with the surface of the cleaning rod, fixed in the cleaning fluid receiving part or the fluid supply channel and in contact with the cleaning rod to form a sliding seal for the rotation or lifting of the cleaning rod; and a sliding sealing pair consisting of a dynamic ring and a stationary ring forming an axial seal, the sealing pair being located in the fluid supply channel and connected to the cleaning rod on one side and rotating synchronously.

[0105] In some designs, the receiving rotary seal is unnecessary, for example, when the device employs a small, integrated design and the waterproof pressurization device is submerged in the receiving section. The relative speeds of the sealing surfaces of the aforementioned dynamic and static rings are low, allowing for operation in dry conditions when using silicon carbide and graphite materials. The aforementioned rotary seal between the liquid supply channel and the cleaning rod allows for free rotation of the cleaning rod relative to the receiving section, i.e., rotation without angular limitations.

[0106] The rotatable cleaning rod can also be designed in a simplified and economical way, connecting the cleaning rod to the liquid supply channel via a hose, and controlling the reciprocating rotation of the cleaning rod via a stepper motor. For example, the lifting cleaning rod in Figure 7 is connected to the hose at one end using the same method. The hose can be a fiber-reinforced silicone rubber composite hose; or a pressure-resistant hose in the shape of a spring-like spiral tube.

[0107] The above design uses a stepper motor as an energy conversion drive to drive the cleaning rod. In practice, other energy drive devices can be used to replace the stepper motor, and speed and start / stop control can be achieved through transmission components and buttons. In this invention, the energy conversion drive device refers to a drive device that converts energy forms other than mechanical energy into mechanical energy to drive the cleaning rod for control. Energy conversion drive devices include various motors, pneumatic motors, hydraulic motors, etc. Motors realize the conversion of electrical energy into mechanical energy and can be called electrical energy drive devices. Electrical energy drive devices include the frameless servo motor in the following examples. Frameless motors can be installed inside the nasal irrigator using the design in Example 5, directly driving the cleaning rod using magnetic force. Pneumatic and hydraulic motors utilize fluid pressure energy for drive, and control is generally achieved by controlling fluid flow and pressure. When the rotating cavity adopts a smaller diameter design, a vane-type hydraulic motor can be used. The vanes slide radially within the rotor slots, and the volume changes due to the constraint of the stator's curved surface. The rotor and vanes form multiple periodically changing sealed working cavities, which have the characteristic of low-speed rotation control. At this time, the hydraulic motor can be set inside the nasal irrigator, and the stator and housing are fixed inside the nasal irrigator. The rotating cavity can be used as an output shaft and bonded to the rotor. With optimized sealing structure, the rotating cavity runs through the hydraulic motor to achieve a compact design of the nasal irrigator. At this time, the hydraulic motor can adopt a waterproof enhancement design for the first and second sealing rings as described in CN214138753U. The sealing rings are set between the rotating cavity and the housing of the hydraulic motor. Stainless steel components can be designed to be fastened to the rotating cavity to form the compression and pre-tightening force on the first and second sealing rings, thereby achieving waterproof sealing. An encoder can be designed for a vane-type hydraulic motor; the encoder can be a magnetic encoder as described in CN113358136A, the Hall sensor probe can be fixed to the end face of the hydraulic motor housing, the encoder disk can be fixed to the rotating cavity through a connecting part, and the encoder can be designed with a waterproof structure in combination with the above-mentioned waterproof design method; by switching the hydraulic oil input and output pipes, the rotation direction of the rotating cavity can be switched and accurate speed and angle control can be achieved.

[0108] The rotating cavity can be driven by a miniature vane-type pneumatic motor; for example, a Stefan... The pneumatic motor structure and related electrical control design described in Figure 1 of the "Controller Design for an MR Safevane Motor" paper, published by the University of Twente, 2024, are shown in Appendix 34. The forward and reverse compressed air pipes of the pneumatic motor can be connected from the outside of the receiving unit and pass through the return liquid channel to the side of the pneumatic motor. The exhaust pipe of the pneumatic motor exits through the return liquid channel. The rotating chamber can serve as the shaft of the pneumatic motor, fixed to the rotor and passing through the motor. The housing of the pneumatic motor can be connected and fixed to the return liquid channel. The pneumatic motor can utilize components such as the proportional servo valve, encoder, and electromagnetic pneumatic valve described in the paper, and its speed and start / stop positions can be servo-controlled according to relevant automatic control logic. In the above design, the simultaneous supply of forward and reverse compressed air ensures a certain level of control accuracy; the use of a relatively short air pipe design can significantly improve control accuracy.

[0109] In this invention, the devices that drive the cleaning rod are collectively referred to as driving devices, including transmission components, energy conversion driving devices, etc. In actual manufacturing, the design of the driving device for rotation can be simplified, eliminating the stepper motor in Example 2 of the nasal irrigator, and using a finger to turn gears for rotation control. In high-end designs, a fixed rocker arm or miniature knob or other input component can be connected to the cleaning fluid receiving part, and an absolute encoder can be used; the operator can operate the input component with their finger to drive the energy conversion driving device through voltage signals. The circuit can map the rotation angle of the finger to the target angle of the energy conversion driving device, and the circuit can map the rotation speed of the finger to the rotation speed of the energy conversion driving device. Combined with the relevant designs in this invention, the cleaning device can achieve convenient control of the rotation speed and position of the cleaning rod.

[0110] Furthermore, to improve comfort during the cleaning process, a cleaning device with multiple liquid supply channels and multiple cleaning rods can be designed. As shown in Example 3 of the nasal washer in Figure 6, it is designed with a liquid supply channel for atomizing cleaning and a liquid supply channel for rinsing. The two liquid supply channels are independent of each other. Figure 10 shows a detailed view of the liquid supply. The design is a variation of Example 2 of the nasal washer. The cleaning rod of the nasal washer is shown in Figure 8. The top shower head 10105 has multiple nozzles 10102 for downward rinsing. Multiple 20µm diameter nozzles are also designed on the side of the cleaning rod for atomizing cleaning, and the corresponding internal channels are straight channels. During manufacturing, the cleaning rod can be divided into upper and lower parts using stainless steel tubing as the dividing point. The internal main channel for rinsing is made of capillary tubes and welded to the upper part. After welding the upper and lower parts together, local drilling can be performed on the side. The two liquid supply channels can be fixedly connected and separated by welding and sealing adhesive. The internal main channel corresponding to the shower head extends downward and changes diameter to form a first rotating cavity 10801. The internal main channel corresponding to the side nozzle of the cleaning rod extends downward and changes diameter to form a second rotating cavity 10802. The first rotating cavity 10801 is partially welded and fixed to the second rotating cavity 10802 by a fixing plate 108d. A rotating sealing cavity 108a is designed at the lower part of the first rotating cavity. The rotating sealing cavity is welded and fixed to an O-ring bracket 108b. The O-ring bracket is designed with several flow holes 108c. When manufacturing the first and second rotating cavities, the second rotating cavity can be partially cut off. After all the components of the first rotating cavity and related parts are welded, the second rotating cavity can be repaired and welded. Local bonding processes can be used. The liquid supply connection chamber 113 is provided with a first liquid supply connection pipe 10501 and a second liquid supply connection pipe 10502. When the liquid supply connection chamber is connected to the second sealing chamber 112, the first liquid supply connection pipe is inserted into the O-ring so that the first rotating chamber is connected to the liquid supply channel corresponding to 10501 for rinsing. The annular space between the second rotating chamber and the first rotating chamber is connected to the liquid supply channel corresponding to 10502, becoming an internal channel for atomized cleaning.

[0111] By adding appropriate pressurization devices or regulating valves, the above design can transform the cleaning device into a multi-channel cleaning system. This allows the operator to pause cleaning of the flushing channels, resume flushing after a certain period of atomized cleaning, providing a better comfort experience; the operator can also perform atomized cleaning and localized flushing simultaneously. With proper design, the multi-channel cleaning system can still achieve effective air pressure control of the nasal cavity.

[0112] The cleaning rod in the nasal washer can also be designed with a lift mechanism, allowing the nozzles to be manually or electrically adjusted up and down. Figure 7 shows example 4 of the nasal washer, which is a variation of example 3. The overall size of the nasal washer can be slightly enlarged to accommodate the motor installation. The lower part of the nasal washer remains unchanged, while the upper part of the first rotating cavity 10801 is modified to a first cleaning rod 101a with a semi-circular cross-section of 2mm diameter. As shown in Figure 9, the top of the first cleaning rod is designed with a shower head 10105, which can be designed with a large number of nozzles 10102 and densely distributed; the internal channel 10103 can be designed with an inner diameter of 20um, which allows the shower head to have good spray diffusion performance and can be used for overall nasal cleaning without rotation. The second rotating cavity 10802 has a partially deformed upper part with a mounting boss 108e and an intermediate interface 108f. A linear motor is fixed on the mounting boss. The linear motor is existing technology, improved based on CN 204597758 U. The linear motor design uses a 5V stepper motor 118 with a diameter of 8mm, equipped with a lead screw and slider to achieve linear motion of the slider. Based on the structure in the published document, a cylindrical output shaft 11801 and corresponding limiting structure are added and connected to the slider to make it a linear motor with an output shaft. When the stepper motor, slider, lead screw, output shaft, and cable are properly waterproofed, it can become a complete waterproof miniature linear motor. The output shaft can be waterproofed using seals such as Glyd rings. The linear motor can be electrically controlled by connecting to an external circuit via a waterproof cable. The upper end of the output shaft is connected to the second cleaning rod 101b with a semi-circular cross-section via a connector 11802, enabling it to lift. The cleaning rod interface 10106 at the lower part of the second cleaning rod is connected to the intermediate interface 108f via a hose 123, allowing the second cleaning rod to connect to the second rotating cavity. The upper part of the second cleaning rod has two nozzles 10102 with a nozzle diameter of 0.2mm, and the front part is a straight channel to achieve forward rinsing; the second cleaning rod is also equipped with a limit ring 10714, so that it can move up and down along the first cleaning rod when it moves.

[0113] The stepper motors in the aforementioned linear motors can be replaced by smaller, lower-voltage DC motors. For example, the KLS23-TGPP06-C-26 model with a main body outer diameter of 6mm can be used. PWM pulse width modulation control is used to change the duty cycle of the output pulse, reducing the motor speed and then transmitting linear output through a lead screw. A rotary encoder can be added to the DC motor for feedback output control.

[0114] In practical designs, linear motors can also employ permanent magnet servo motors with magnetic drive structures. Existing technology includes miniature cylindrical linear permanent magnet servo motors with an outer diameter of 8mm or less. The output shaft has permanent magnets arranged alternately in a N-S pattern along the axial direction. The excitation stator with energized coils is cylindrical, with multiple annular excitation units evenly distributed along the axial direction. The servo control system supplies an alternating circuit to each excitation unit to obtain a dynamic magnetic field, which interacts with the permanent magnet array on the output shaft to drive the output shaft. A Glyd ring or similar sealing method can be used between the output shaft and the excitation stator to prevent water from entering the air gap; even if a small amount of water enters the air gap, it does not significantly affect normal operation. Through structural optimization, the aforementioned linear permanent magnet servo motor can also achieve a smaller output shaft and motor size, and when mounted on a boss, it is used for the lifting and lowering movement of the second cleaning rod.

[0115] The above-mentioned lifting design can also use a linear electric cylinder based on the principle of ball screw or planetary roller screw to drive the cleaning rod. The linear electric cylinder uses a servo motor and mechanical transmission components to convert rotational motion into linear output. Alternatively, a piston-type pneumatic push rod and encoder can be used to replace the above-mentioned servo motor. Various waterproof designs can be used to achieve the function.

[0116] Furthermore, the first cleaning rod in the design can be given independent lifting and lowering motion through design optimization. The rotating sealing cavity 108a can be lengthened axially, and the first liquid supply connection pipe 10501 can be extended. After local structural modifications, the O-ring can be replaced with a Glyd ring or other sealing element with better dynamic sealing performance. The welding fixation between the fixing plate 108d and the first rotating cavity 10801 can be eliminated, with the fixing plate 108d only providing radial limitation for the first rotating cavity, allowing it to move axially. The welding fixation between the first rotating cavity and the mounting boss can also be eliminated, and sealing elements such as O-rings can be added to enable axial movement. A micro linear motor can be added to the mounting boss to provide feedback control for the lifting and lowering of the first cleaning rod. At this point, the first and second cleaning rods achieve independent lifting and lowering motions while rotating controllably, improving cleaning comfort. The above-mentioned lifting control of the first cleaning rod can also adopt other simplified control schemes, such as completely eliminating the limiting effect of the mounting boss on the first cleaning rod, adding a micro linear motor to the mounting boss, and adding a flexible hose between the first rotating cavity 10801 and the first cleaning rod, thereby realizing the independent lifting of the first cleaning rod.

[0117] The lifting and lowering cleaning rod enables concentrated flushing of local secretions with a limited flow rate. After the secretions are softened by atomization and cleaning for a certain period of time, the concentrated flushing function can accelerate the separation and shedding of secretions. Simultaneously, the flushing flow rate can be adjusted by frequency conversion. The above design uses a linear motor as the energy conversion drive device to control the lifting and lowering of the nozzle; other drive forms can be used in practice. In the example, the side flushing nozzle can be designed with a small outflow diameter, such as 20µm, and a high outflow velocity, such as 2m / s. In this case, the flushing nozzle has a good local flushing effect on secretions and less irritation to the nasal cavity. A nasal sealing edge can be omitted; instead, a water-blocking edge as shown in Figure 14 can be used in conjunction with a larger receiving part. In this case, the nasal cleaning head can be held and moved within the nasal cavity for non-fixed-point cleaning of secretions. The flushing nozzle can be rotated to a target azimuth angle via an input device, and then controlled by a control circuit to perform reciprocating rotation within a preset angle range for fixed-point flushing. The preset angle can be 3 degrees. The above fixed-point flushing control is applicable to both friction cleaning and air cleaning sections.

[0118] The position of the friction part in the nasal washer can be flexibly set, and it can be moved independently relative to the cleaning rod using an independent transmission component, that is, the nasal washer has an independent friction device. As shown in Example 5 of Figure 11, it is an improvement on Example 2 of the nasal washer. A partial sectional view of the friction device is shown in Figure 12, and a detailed view of the friction part is shown in Figure 13. The cleaning chamber design is changed to a two-section design: the upper section is the cleaning rod and friction device; the lower section is the cleaning chamber connecting pipe and cleaning chamber filter section; the two sections are bolted together, but other connection methods can be used in actual manufacturing. An independent friction device 107 is added to the design, which is spot-welded to the side wall of the cleaning chamber through a connecting plate 10707a, and the connection gap is treated with sealant.

[0119] The hollow cavity 10703 drives the friction base plate 10715 and friction rod 10713, enabling the friction unit to operate independently through the frameless motor design. The center of the hollow cavity 10703 is fixed to the inner magnetic rotor 10702 of the frameless motor, which is equipped with a permanent magnet 10702a. The excitation stator 10701 of the frameless motor, with its energized coil, is fixed to the friction fixing cavity 10707 to magnetically drive the inner magnetic rotor. The friction fixing cavity has four pre-installed connecting plates 10707a for welding and fixing to the cleaning chamber. The hollow cavity is limited and rotated within the friction fixing cavity using a third bearing 10704 and a fourth bearing 10705. The rotating cavity, after its diameter decreases from 8mm to 2mm at the bottom of the friction device, passes through the hollow cavity. The stator, rotor, and bearing outer rings can be fixed using methods such as bonding or heating. The outer ring of the bearing can also be limited by designing a step in the friction fixing cavity, and a spacer can be added between the outer ring and the stator to limit the outer ring of the bearing.

[0120] The friction-fixing cavity is bolted to the cover plate 10708 at the top and bottom. A circular groove on the cover plate accommodates the oil seal 10710. The pressure plate 10709 is secured with set screws 1152, achieving a seal for the friction-fixing cavity. The cover plate and pressure plate can be designed with a stop for easy positioning. End caps 10712 are designed at the top and bottom of the hollow cavity. Each end cap has a circular groove for accommodating an O-ring 10718 to seal the interior of the hollow cavity, preventing cleaning fluid from entering. The end caps and hollow cavity are limited by the stop and welded together at the corner 10706, then sealed with adhesive. Micropores can be designed to connect the hollow cavity and the friction-fixing cavity. The friction-fixing cavity can also be designed with microchannels to connect with the atmosphere, preventing overheating and expansion of the internal operating air.

[0121] The upper end cap is designed with a slot 10712a for mounting and fixing the friction base plate 10715. The slot can be optimized for easy insertion and fixing of the friction base plate. The friction rod and the friction base plate can be integrated. The friction rod is provided with multiple bundles of brushes forming the friction part 10700. The brushes are composed of several fibers. A limit ring 10714 is provided on the upper part of the friction rod, which cooperates with the cleaning rod to limit the friction rod and prevent it from loosening. The limit ring can be made of lightweight material, and the friction rod can be made of stainless steel profile with a specific cross-sectional shape.

[0122] The main body of the cleaning rod inside the nasal cavity has an outer diameter of 2mm. Multiple horizontal nozzles are arranged on the outside, and a shower head is designed on the upper part. The nozzle of the shower head has a spray angle of more than 90 degrees to rinse nasal secretions.

[0123] The excitation stator of the aforementioned nose washer with friction device can be designed as a three-phase symmetrical sinusoidal winding driven by an external circuit connected by a cable. The input device can be located on the nose washer itself. The rotor can use a 2-pole permanent magnet. A Hall sensor probe can be fixed at the cover plate, and an encoder disk can be fixed at an appropriate position in the hollow cavity, thus forming an encoder for feedback of the rotation angle of the hollow cavity. A 24V or 5V DC power supply can be used, and a rotating magnetic field is generated through an inverter circuit to servo drive the rotor. Under the computational control of FOC control (field-oriented control technology), three-phase voltage modulation can be achieved through SVPWM and other methods. Precise control of torque, rotation angle, and rotation speed can be achieved. The rotor speed, direction, and start / stop can be controlled by buttons or knobs on the nose washer itself. The friction part can be oscillating and rubbing for cleaning within a small angle range, such as 3 degrees. The excitation stator can be considered as a component with embedded electromagnets; the above design utilizes the magnetic force of the electromagnet on the permanent magnet to achieve rotation control.

[0124] In the above-mentioned drive method using a frameless motor, the electromagnet is fixed in the return liquid channel, and the permanent magnet is connected to the moving cleaning rod to achieve magnetic drive; when there is a fixed cleaning rod in the middle of the return liquid channel in a specific design, the electromagnet can also be fixed on it, and the permanent magnet can be fixed on the external moving cleaning rod to form an external rotor motor.

[0125] The above design enables an independent friction function. In practice, the friction function can be paused at the beginning of nasal irrigation, and only rotational rinsing can be performed. Once the secretions have softened, the friction function can be activated. The position, speed, and direction of the friction brush can be flexibly controlled by the operator. After completing nasal irrigation, the operator can backwash the irrigation chamber using the connecting tube, or remove the friction rod and disconnect the connection between the irrigation chamber and the first sealing chamber for cleaning.

[0126] Example 6 of the nasal washing design employs a different friction device design, as shown in Figure 14. Derived from Example 5, the design retains most of the original design but removes the frameless motor components. Based on the operating principle of a magnetic pump, an intermediate chamber 1031 is added to the cleaning chamber to house the inner magnetic rotor 10702 and the outer magnetic rotor 10717. The inner magnetic rotor is equipped with permanent magnets 10702a, which can have four or more pole pairs. The outer magnetic rotor is equipped with corresponding permanent magnets. When the intermediate chamber 1031 is made of a non-magnetic material, the N and S poles of the inner and outer magnetic rotors can penetrate the non-magnetic material without contact and attract each other to form a magnetic torque, achieving magnetic drive. The support, i.e., the hub, of the inner magnetic rotor can be made of stainless steel, and the hub can be fixed to the rotating cavity using adhesive material. Multiple flow holes 10702b are designed on the hub to allow the cleaning fluid to flow through. The external magnetic rotor can be further designed with sliding bearings for positioning; in the example, the external magnetic rotor is bonded and fixed in a rotating mounting sleeve 10719, which is positioned on the intermediate chamber by a flanged sliding bushing 10720 and a rotating fixed sleeve 10721; the rotating fixed sleeve is fixed to the intermediate chamber by set screws. The external magnetic rotor can be designed with a housing for appropriate protection, and the hollow cavity can be rotated manually. During manufacturing, the flanges at both ends of the intermediate chamber can be welded after the inner and outer rotors are installed. A key feature of the above design is that the transmission components include a pair of permanent magnets for transmitting magnetic torque, used for magnetic drive; the design can also use an excitation stator to replace the external magnetic rotor for magnetic drive, thus enabling more convenient electrical drive. The friction device can also be driven mechanically. For example, in conjunction with the design of Example 6 of the nasal rinsing device, the outer magnetic rotor and inner magnetic rotor can be eliminated; the cleaning rod in the cleaning chamber does not change diameter, the hollow cavity extends downward, passes through the sliding sealing pair in the first sealing chamber, extends into the first bearing chamber and is limited and fixed by the first bearing, and a sealing ring is added between the cleaning rod and the hollow cavity, and a sealing ring is added between the hollow cavity and the first bearing chamber; the hollow cavity can be manually driven by gear transmission in dry working conditions; the hollow cavity can also be rotated using the original stepper motor design.

[0127] In this nasal washer design, the friction part features shorter fibers to reduce irritation to the nasal cavity caused by excessively long fibers. A water-retaining edge 10301 is fixed to the edge of the receiving part. This edge is larger than the sealing edge, does not seal the nostrils, and is made of thin stainless steel. It effectively prevents leakage of the cleaning solution when the nasal washer is moved. A curved surface or soft material can be designed at the point of contact with the oral cavity to ensure a close fit and prevent leakage. In this case, the receiving part can be designed to be slightly larger than the nostrils, resulting in a compact and hygienic design. During use, the nasal washer can be moved with one hand for targeted cleaning of the nasal cavity, offering higher efficiency than existing technologies. The friction part can be made of a solid component with a certain degree of roughness or wound cotton fibers.

[0128] In practice, the design can be further refined by combining various methods of the present invention, adding a driving device to the friction part to enable it to move up and down, and achieving independent lifting and lowering control relative to the cleaning rod. For example, in the nose washing tip example 5, the slot at the upper pressure plate can be removed, and a micro linear motor can be installed, with its output shaft connected to the friction rod for lifting and lowering control.

[0129] In this invention, both the cleaning rod and the rod with the friction part achieve the cleaning function and can be collectively referred to as the cleaning rod. When the cleaning rod can be raised, lowered, rotated, or moved radially relative to the receiving part, it is called a moving cleaning rod. When the cleaning rod and the friction rod are used together, the outer diameter of the rigid structural part of the cleaning rod and the friction rod can be less than or equal to 5 mm, more preferably less than or equal to 3.5 mm. For the cleaning rod with the flexible friction part, the rigid structure is the base part that is not used for friction. For the cleaning rod with a rough surface without the flexible friction part, it is itself a rigid structural part and can have different hardness. The mobile cleaning stick can employ various localized cleaning methods, including high-speed cleaning fluid jet blowing, friction part cleaning, and simple air blowing. Simple air blowing can create an effect similar to an air knife, and can also dry the nasal cavity. The mobile cleaning stick achieves localized cleaning of secretions and can work in conjunction with a cleaning stick with a nozzle having a spray angle greater than or equal to 90 degrees. The mobile cleaning stick can also be equipped with a nozzle that sprays cleaning fluid independently. When no other cleaning stick is used, this nozzle acts as a local spray nozzle to clean secretions and the nasal cavity. In this case, cleaning can be performed from top to bottom, and a friction part can be placed near the nozzle for simultaneous cleaning. When using the mobile cleaning stick, the cleaning fluid receiving part does not need to have a nostril sealing part, and the nasal head can only have a rotation control function, allowing for handheld cleaning of the nasal cavity. The rotation control can be achieved through an electrically driven device for convenient cleaning. The nozzle on the mobile cleaning stick that sprays cleaning fluid can be called a local spray nozzle, and the local spray nozzle can have a large spray cone angle. The top-to-bottom cleaning method described in this article refers to the cleaning fluid being applied from top to bottom when the nozzle is located at the top of the cleaning rod. This method utilizes the gravity return of the cleaning fluid and aligns with the airflow direction under negative pressure in the nasal cavity, making it less likely for the cleaning fluid to enter the oral cavity. In this case, the spray angle of the nozzle on the side of the cleaning rod can be slightly less than 90 degrees to better clean the area near the nozzle. The nozzles on the cleaning rod that spray the cleaning fluid, the friction part, and the air spray nozzle are used for cleaning the internal area of ​​the nasal cavity and can be collectively referred to as the cleaning part; the friction part can be called the friction cleaning part; and the air spray nozzle can be designed with a spray angle greater than 90 degrees to facilitate fluid return. The part that limits the movement of the cleaning rod can be called the main body, which can also be used as a handheld device.

[0130] The cleaning rod can also be rotated using the pneumatic and hydraulic motor design method shown in Example 2 of the nose washing tool; the housing of the pneumatic and hydraulic motor can be fixed inside the cleaning chamber, and the hollow cavity can be fixed to the rotor, which can be achieved through detailed design.

[0131] The independent rotation and lifting functions of the local nozzles can be achieved through detailed design. As shown in Figure 15, the design is based on the nasal washer example 5 and incorporates the cleaning rod from Example 4. The gap between the hollow cavity and the rotating cavity serves as the liquid supply channel. The lower pressure plate structure is modified to form a cavity, with a cleaning rod interface 10106 on the side for connecting the hose. A middle interface 108f is opened on the upper side of the hollow cavity, which supplies liquid to the second cleaning rod 101b via the cleaning rod interface 10106 connected to the hose. The linear motor is fixedly mounted on the cantilever 10725, which can be connected to the end cap by welding. This design enables independent rotation and lifting of the local nozzles, facilitating operation. Furthermore, the connection between the connecting plate and the surrounding cavity can be eliminated, and the friction-fixed cavity can be raised and lowered as a whole by connecting the first cleaning rod via a hose. Combined with the design in Example 8, after optimizing the linear motor and space, the planar movement and flexible lifting control of the two cleaning rods can be achieved, further facilitating use.

[0132] The cleaning rod can be moved along a specified direction on a plane using a drive device, as shown in Example 8 of Figure 16. A 5-axis robotic arm is used to control the movement; this can be achieved using a large number of existing technologies. The five rotating joints below the cleaning rod use frameless servo motors. The rotor can use a 2-pole permanent magnet, and the excitation stator diameter can be designed to be 10mm, with a three-phase symmetrical sine wave winding. The motor can be powered by 24V DC. The 5-axis robotic arm is fixed to the robotic arm base 12402, which is fixed to the robotic arm mounting plate 12401 with flow holes. The mounting plate is fixed to a detachable compartment. A flexible hose connects the liquid supply connection pipe and the cleaning rod interface, forming the liquid supply channel.

[0133] The motors in the second, third, and fourth rotary joints 12402b, 12402c, and 12402d use encoder feedback to calculate the height and coordinates of the cleaning head; the lower first rotary joint 12402a uses encoder feedback for calculation and control; the upper fifth rotary joint 12402e uses an encoder to control the rotation angle of the upper robotic arm 12403, preventing the cleaning rod from deflecting axially. The rotary joints can utilize existing waterproof sealing designs to ensure normal operation under water spray conditions. The robotic arm can also be equipped with sensors such as eddy current sensors to assist in distance judgment; mechanical limit components can be installed within the space to prevent the robotic arm from falling when the mechanical brakes age and fail.

[0134] The cleaning device can be controlled by a control circuit based on the calculations of three joint encoders (12402a, 12402b, and 12402c) to control the rotation joint 12402d, ensuring that the upper robotic arm 12403 remains parallel to the axial direction. The cavity near the robotic arm can be designed as a 50*50mm rectangular cavity, allowing the flexible hose 123 to be placed in the corner of the rectangular space, providing sufficient movement space for the robotic arm; alternatively, other spatial designs can be used to lay the hose.

[0135] An XY-axis coordinate system for the cleaning rod can be established in the control program, with the origin pre-calibrated, and the real-time coordinates of the cleaning rod calculated by an encoder. Input devices such as touchscreens or joysticks can be used. The input signals are converted into the corresponding coordinates and movement path of the cleaning head on the moving plane using a coordinate mapping algorithm. During cleaning, the movement of the cleaning rod on the two-dimensional plane is controlled based on the real-time position changes of the cleaning rod and the input signals. Furthermore, the control program can treat the input signals from the touchscreen or joystick as movement speed, allowing the robotic arm to move the cleaning rod on the two-dimensional plane at a certain speed and in a specified direction according to the operator's intention, and providing positional alarm prompts. The aforementioned touchscreen and joystick can be collectively referred to as input devices; they contain electrical signal components to realize the signal input for the movement of the cleaning rod, and can be miniaturized and fixed at a certain position on the nasal irrigator for convenient operation; the input device can be a wireless device such as a mobile phone.

[0136] There are several ways to lock a rotary joint in the event of a power failure, such as using an electromagnetic brake design to ensure the robotic arm remains in its original position during a sudden power outage. One approach is to use the brake disc design described in publication number CN 113370196 A, which incorporates an electromagnetic brake. When the joint loses power, the brake pads of the electromagnetic brake apply pressure to the output shaft. Alternatively, designs similar to those used in robot finger joints can be employed.

[0137] The aforementioned joint design can utilize existing technologies to achieve miniaturization and motor weight reduction. For example, the relevant structure in CN 120395978A can be adopted; the harmonic reducer design can achieve a large reduction ratio and a more compact transmission design; a related power-off braking design can be employed; and a 24V motor can be used based on this disclosed design to ensure operational safety. Alternatively, the relevant designs in CN 120363231 A and CN 120095793 A can be used, employing the self-locking characteristic of the worm gear helical gear transmission mechanism to achieve power-off braking; the servo motor can use lower power and voltage, such as 5V; and waterproofing can be achieved using the sealing ring design.

[0138] In the detailed drawing of the rotating part, the structure of the rotating part is similar to the friction device in Example 5 of the nasal washer. Both the first and second cleaning rods have semi-circular cross-sections, fitting together to form a circular cross-section. A sleeve 127, closed at both ends, is used to assist in installation at the point where it passes through the inner magnetic rotor. The sleeve is cylindrical, closed at both ends, and partially bonded to the cleaning rod to clamp it. A rotary sealing part is designed at the lower part of the rotating part; the rotary sealing part includes a rotary sealing pressure plate cavity 126, which is fixed to the upper cover plate by screws. The rotary sealing pressure plate cavity 126 also has two cleaning rod interfaces 10106. At the point where the first and second cleaning rods pass through the O-ring bracket 108b, local pretreatment with filler is used to ensure a smooth and leak-proof contact with the O-ring 10718. The end of the second cleaning rod is closed, and a cleaning rod opening 125 is drilled between the O-ring bracket and the cover plate, designed to make the second cleaning rod an independent liquid supply channel. The rotary sealing pressure plate cavity can be fixed to the robotic arm by screws or adhesive.

[0139] The direction of the rinsing nozzle can be changed by controlling the frameless servo motor of the rotating part through the controller; at the same time, the frequency and angle of the rotation and oscillation of the rinsing nozzle can be set in the controller to achieve point-to-point cleaning of secretions. The above design, together with the design of the robotic arm, achieves non-point-to-point cleaning. In actual design, the design can be further refined to add sensors or optimize algorithms so that the robotic arm has the function of moving up and down, realizing non-point-to-point cleaning of the cleaning rod in the height direction; the input device can be added to change the height input information, so that the cleaning rod can move in a controlled manner in the height direction. Alternatively, the design method in the nose washing example 4 can be adopted, adding a mounting platform to the upper robotic arm 12403, and adding a linear motor between the mounting platform and the rotating sealing pressure plate cavity 126 to control the lifting and lowering of the rotating sealing pressure plate cavity, so that the two cleaning rods have non-point-to-point cleaning capabilities in both the planar and height directions.

[0140] The non-manual indirect movement function can also adopt the design of the nasal washing head example 9 in Figures 18 and 19, where the washing rod is controlled by the coordinated movement of the X-axis slide and the Y-axis slide.

[0141] The Y-axis slide is assembled and welded from a set of circular cross-section limiting shafts, with a U-shaped end. The limiting shaft 127 on one side of the Y-axis slide is fixed to the side of the cleaning rod 101, thereby moving the cleaning rod for cleaning. The bottom of the cleaning rod is connected to a hose for liquid supply.

[0142] The U-shaped section passes through two bearing seats 129 to prevent the Y-axis slide from deflecting. The limiting shaft between the U-shaped section and the cleaning rod passes through another bearing seat 129, which further limits the Y-axis slide. The Y-axis slide is driven at one end by the output shaft of the second linear motor 118b. The output shaft of the second linear motor is connected to a fork-shaped part 130, the structure of which is similar to the driving fork of a universal joint. The fork-shaped part and the U-shaped section are connected by screws to form a rotary joint connection.

[0143] The Y-axis slide's limiting shaft can be made of 2mm diameter hollow stainless steel tubing to reduce weight. The three bearing seats can be made of engineering plastic, and sliding bearings are used to limit the limiting shaft. The bearing seats can be fixed to the X-axis slide's bracket by adhesive bonding.

[0144] The X-axis slide's support can be made of hollow stainless steel square tubing 128, and the second linear motor can be fixed to the support with screws. The X-axis slide's support is equipped with a first limiting shaft 127a and a second limiting shaft 127b. These two limiting shafts pass through the central hole of the support and are limited by set screws. The first and second limiting shafts pass through corresponding bearing seats for limitation. The bearing seats and the first linear motor 118a can be fixed to the bearing seat mounting frame 131 with screws. This frame can be made of multiple engineering plastic sheets of a certain thickness and fixed to the cleaning chamber. A lead screw is provided at the front of the linear motor output shaft, passing through the Y-axis slide's support and fixed with a nut. The linear motor can be placed outside the cleaning chamber, saving space.

[0145] The linear motor can be any of the linear motors and encoder designs described earlier for lifting control; or it can be replaced by an electric cylinder or a pneumatic push rod. Since the driving force of the slide is relatively small, a smaller ultrasonic motor can be used to create a more compact nasal cleaning head; a planetary reducer and lead screw can be used for mechanical transmission to obtain greater driving force; and a magnetic encoder can be installed on the output shaft for feedback control.

[0146] Similar to the principle of a robotic arm, an X and Y axis coordinate system for the cleaning head can be established in the control program, with the origin pre-calibrated. The real-time coordinates of the cleaning rod are calculated using an encoder. A touchscreen or joystick can be used to move the cleaning rod, allowing the cleaning head to move in the required direction and speed. The specific control logic can refer to numerous existing technologies, such as Zhang Kangting's "Design of a Model-Based Controller for a Dual-Axis Servo Mechanism" (National Taiwan University of Science and Technology). Feedback can be obtained from encoders on two linear motors to establish position and speed closed-loop control. The position closed-loop control calculates the speed setpoints for the two linear motors, and the speed closed-loop control uses speed feedback and speed setpoints to calculate the current of the two linear motors for control, thereby achieving accurate control of the cleaning head's position and movement speed.

[0147] The XY-axis slide can be equipped with the aforementioned rotation and lifting drive device and liquid supply design between the limit axis and the cleaning rod to achieve compound motion of the cleaning rod; multiple liquid supply channels, friction cleaning section, air cleaning section and other designs can be adopted to achieve comfortable cleaning with multiple cleaning sections. The nozzle can be fixed to the cleaning chamber and spray the cleaning liquid upward near the edge of the nasal cavity, using only the friction rod for compound motion.

[0148] In summary, the above design features an energy conversion drive device that enables composite motion control of the cleaning fluid nozzle or other cleaning parts. This composite motion includes the movement of the projection point of the cleaning fluid nozzle or other cleaning parts on a two-dimensional plane along any specified direction, the raising and lowering of the nozzle or other cleaning parts, and the rotation of the nozzle or other cleaning parts. This design is particularly suitable for situations where the nasal cavity is filled with hardened secretions. During cleaning, a cleaning rod with an outer diameter of 1 mm or less can be inserted into the limited space within the nasal cavity. The horizontal position and height of the cleaning rod can be flexibly adjusted via the input component to position the cleaning chamber appropriately. Then, localized softening and targeted removal of secretions can be performed, followed by comprehensive cleaning by flexibly adjusting the horizontal position and height of the cleaning rod via the input component. Furthermore, when the cleaning chamber has a nasal cavity sealing edge, effective control of nasal cavity air pressure and the suction effect of the return fluid channel can be achieved.

[0149] In this invention example, the circulating cleaning tank or supply tank and the nasal irrigation tip are connected by a flexible hose, forming a separate design. Because this device has high cleaning efficiency and requires a small volume of cleaning fluid for a single nasal cavity cleaning, many existing technologies in the same field can be used to design the circulating cleaning tank or supply tank and the nasal irrigation tip as a single unit, achieving a complete design for a small handheld cleaning device.

[0150] For example, as shown in Figure 22, the cleaning device is an integrated design consisting of a circular cylinder 11, a nasal irrigation tip 1, a water pump 4, a filter 9, an electric heater 10, and other components. The handheld design includes a partition 12 that divides the cylinder into a cleaning solution storage space 13 and a dry space 14. The dry space houses a diaphragm-type micro water pump 4 and a filter 9. The circulation interface 203 at the bottom of the cleaning solution storage space 13 is connected to the water pump via a flexible hose. The liquid supply channel 5 is a flexible hose with a filter in the middle. The handheld device can further incorporate an exhaust device at the top of the cylinder to create negative pressure in the nasal cavity during use. The device can also employ a frequency converter or valve adjustment to change the flow rate during liquid supply and improve comfort. The device can be equipped with several movable compartment doors for easy disassembly of the filter and motor; the cylinder can be designed as a two-section split design for easy cleaning of the chamber and drug dosing.

[0151] When the cleaning device uses two-phase flow cleaning, it can achieve high atomization efficiency with air assistance; at the same time, it can also achieve cleaning from top to bottom.

[0152] Specifically, a venturi nozzle with an existing structure can be used to induce spraying; it generally has a constriction section, a throat, and a divergence section. When compressed air is connected to the venturi nozzle, the air velocity increases and the pressure decreases in the constriction section. By connecting a liquid supply channel through the opening in the constriction section or throat, the cleaning fluid can be induced to enter and form a mist-like mixture that is then injected into the cleaning rod. Specifically, a miniature air pump or small air compressor can be designed. The inlet of the air pump or small air compressor can be connected to the circulating cleaning tank cover through a pipe to draw in air. An air supply channel is designed to connect to the cleaning rod, and the venturi nozzle is placed in the air supply channel to induce the cleaning fluid to spray out. For details, please refer to CN219167070U.

[0153] Furthermore, an ultrasonic atomizing component can be used to atomize and spray the cleaning fluid. The piezoelectric ceramic sheet can be used to generate high-frequency vibration energy in the ultrasonic band to break up the liquid water molecule structure and generate water mist. The mixture of air and water mist is then sent out through a pressurization device. As shown in Figure 23, the small handheld device is composed of a cylinder 11 and a spray reservoir 19. The cylinder 11 is divided by a partition plate 12 into a cleaning fluid storage space 13 and two dry spaces 14. A piezoelectric ceramic plate 16 is installed on the side of the spray reservoir, and the other side of the piezoelectric ceramic plate is connected to an atomizing buffer box 15. A mist outlet 1503 is provided on one side of the atomizing buffer box and connected to a liquid supply pipe 5, which is connected to a cleaning rod. The atomizing buffer box is provided with a pressurization interface 1502 and connected to an air pump 4b. A filter 9 for air filtration is provided in the middle. The air inlet of the air pump 4b is connected to a circulation interface 203 on the upper part of the cylinder through a hose. The atomizing buffer box is also provided with a condensate drain interface 1501, which is connected to a condensate drain 18 through a hose and to a condensate drain inlet on the cleaning fluid storage space. 204 is connected; a constant temperature water temperature controlled electric heater 10 is installed below the liquid surface of the cleaning fluid storage space 13; a tank supply port 205 is installed at the bottom of the cleaning fluid storage space, which is connected to the supply pump 3 via a hose 123. The outlet of the supply pump 3 is connected to a filter 9, and the outlet of the filter 9 is connected to the atomizing inlet 1902 of the atomizing storage tank via a hose. The atomizing storage tank can control the start and stop of the supply pump by installing a reed switch to achieve liquid level control; the atomizing storage tank is equipped with an atomizing air pressure balance interface 1901, which is connected to the supply air pressure balance interface 501 on the supply pipe via an air pressure balance pipe 17. The air pressure balance pipe can be made of a thin PVC pipe with a certain hardness. The air pressure balance pipe ensures that the air pressure of the atomizing storage tank and the supply pipe are consistent, so that the piezoelectric ceramic plate can work normally.

[0154] The piezoelectric ceramic sheet in the example uses a ring-shaped structure, with a metal electrode coated on one side and a thin metal sheet bonded to the other side. This thin metal sheet has densely and evenly distributed micropores. Atomization is achieved by applying an electric current to the piezoelectric ceramic sheet, causing vibration that drives the metal sheet to vibrate. See CN20151964U for details. In practical designs, a piezoelectric ceramic sheet without micropores can also be used. By immersing the piezoelectric ceramic sheet below the liquid surface in an appropriate manner, cavitation occurs on the water surface, atomizing the water. This can be combined with the design in the example to achieve atomized delivery. The piezoelectric ceramic sheet in the example uses the energy of high-frequency vibration to break up and atomize the water, generating kinetic energy in the water droplets. As an ultrasonic atomizing component, it can also be considered a pressurization device.

[0155] The condensate drain in the example can be a conventional float-type design, miniaturized using existing microfabrication techniques, such as the design described in CN 104266078 A. Alternatively, the condensate drain can be controlled by a micropump with a level switch instead of a micropump for start / stop control. The air pump can be a diaphragm or piston-type micropump, and the outlet filter can be a PP filter element to achieve simultaneous filtration of both gas and liquid phases. A water-gas separator can be added to the inlet pipe for optimized design. The liquid supply pump and related filters can use the same selection and design as in device example 3. The liquid supply pipe 5 can be designed with a large diameter and sufficient strength to reduce resistance and droplet loss during gas-liquid two-phase transport.

[0156] The cleaning rod in the example, as shown in Figure 24, can be made of a stainless steel tube with an outer diameter of 2 mm and a wall thickness of 0.1 mm. A short stainless steel tube with a wall thickness of 0.5 mm is welded to the head. Several nozzles with a spray angle greater than 90 degrees are set on the short stainless steel tube, corresponding to a channel diameter of 0.2 mm, and the number of nozzles can be several hundred. The total flow rate of the cleaning rod can reach 6 L / min.

[0157] For two-phase flow cleaning, a bubble-assisted design can also achieve good atomization performance. As shown in Figure 27, the nozzle module is cylindrical with a length of 0.52 mm and a diameter D of 0.4 mm, and is made of copper or stainless steel. The module consists of two parts: the bubble-assisted part on the left and the nozzle part on the right, which are bonded together. The nozzle part has a nozzle diameter d of 0.2 mm and a mixing chamber outlet 10118 with a diameter of 40 μm. The structure is obtained by micro-milling cutter and drill bit or laser processing. The middle part of the bubble-assisted part is the mixing chamber, which serves as a mixing chamber for air and cleaning fluid. There are 30 air injection channels 10115 with a diameter of 20 μm distributed around it, and a liquid inlet 10113 on the left. The nozzle part is also welded and fixed with a baffle 10117 to attenuate the velocity and disperse the direction of the ejected liquid-gas mixture. When air flows in from the air injection channel at a certain flow rate, it forms a large number of tiny bubbles in the liquid. The cleaning fluid, filled with these tiny bubbles, is accelerated and ejected from the outlet of the mixing chamber. Within a very short time and distance of ejection, due to the expansion and impact of the bubbles, the cleaning fluid is atomized into even smaller particles. The outlet of the mixing chamber is a narrow section. Compared to the ordinary compressed air-induced cleaning fluid method, the bubble-assisted method can achieve a smaller gas-liquid ratio, such as 0.01. In the small space of the nasal cavity, a smaller gas-liquid ratio provides higher comfort and cleaning performance. The bubble-assisted design also facilitates flexible flow control and helps to achieve a larger jet cone angle.

[0158] The specific application of the aforementioned bubble-assisted module is shown in Figure 28. Figure 28 shows a partial view of the cleaning rod; the main body of the cleaning rod is composed of an inner layer of thin-walled stainless steel tube and an outer layer of thin-walled stainless steel tube; the inner tube has an outer diameter of 0.46 mm and a wall thickness of 0.1 mm, serving as the main channel for supplying cleaning fluid; the outer tube has an outer diameter of 1.4 mm and a wall thickness of 0.1 mm, serving as the main channel for supplying air; the inner tube can be fixed inside the outer tube by internal support. Suitable small holes are drilled around the cleaning rod, and the bubble-assisted module is inserted. Because the bubble-assisted module has a conical surface 10116 on its side, it will isolate the main channels for supplying liquid and air after fixing. The bubble-assisted module and the main channel for supplying air can be fixed by laser welding. The aforementioned nozzle can be considered a pre-formed modular nozzle with a mixing chamber.

[0159] The bubble-assisted design in Figure 27 can be modified to create another air-assisted atomization enhancement method. As shown in Figure 29, the size and structure of this module are similar to those in Figure 27. This module has only one air injection channel 10115 with an inner diameter of 60 μm, located on one side of the mixing chamber. Thirty liquid inlets 10113, each with an inner diameter of 20 μm, are arranged around the mixing chamber. This design utilizes a small flow width to atomize the cleaning fluid over a very short distance, while simultaneously using a small airflow to agitate and mix the atomized cleaning fluid, thus enhancing atomization. Furthermore, due to the reduced gas-liquid ratio, the baffle 10117 is unnecessary. The air-assisted effect increases the spray cone angle relative to the straight-channel nozzle. This module also has good applicability and can be applied to cleaning rods where the inner tube is air and the outer tube is cleaning fluid. The number of liquid inlets, acting as narrow sections, can be reduced, and a smaller spray volume and size can create a smaller nozzle module. The shape and size of the mixing chamber, etc., can be determined experimentally to find the optimal solution, and the spray direction of the liquid inlets can be optimized. In the aforementioned two-phase flow nozzles, the liquid and gas phases are not limited to mixing within the mixing chamber. Two-phase flow cleaning can also be achieved by distributing multiple liquid and gas nozzles at intervals on the cleaning rod, with airflow outside the cleaning rod assisting in liquid column atomization.

[0160] The nozzles in Figures 27 and 29 can be flexibly arranged at various points on the moving cleaning rod through the design of liquid supply channels and air supply channels to achieve various spray angles and flow rates. For example, an air supply channel can be added to the nozzle in the cleaning rod in Figure 31. With a suitable channel design, upward two-phase flow atomization cleaning can be achieved.

[0161] The nozzle atomization schemes represented in Figures 25, 27, and 29 achieve varying degrees of atomization enhancement and can achieve large injection cone angles. Compared to the straight-channel micro-orifice type, a single nozzle can achieve a larger liquid supply and injection cone angle.

[0162] In the above two-phase flow design, both the air injection channel and the main air supply channel serve as air supply channels. The compressed air generating device can be a miniature air pump, such as a diaphragm pump or a piston pump; specifically, it can be called an air booster device. In two-phase flow cleaning, the air booster device can operate simultaneously with the liquid pump and adopt a frequency conversion design, making control and cleaning more convenient; when the design uses a small amount of air assistance, the total flow rate in the nasal cavity during cleaning can be controlled below 10ml / min, ensuring comfort and safety.

[0163] The above chapters mainly describe the relevant solutions and applications of the design with nozzles on the upper part of the cleaning rod.

[0164] In practical applications, there may be excessive hard secretions in the nasal cavity, preventing the cleaning rod from penetrating the secretions for cleaning via the side or top nozzles. In such cases, a nozzle with a spray angle of less than 90 degrees can be placed on top of the cleaning rod to form a through-type cleaning rod, which can be used for tunneling cleaning to create a cleaning channel. As shown in Figure 30, this cleaning rod has a diameter of 0.5 mm, a wall thickness of 0.1 mm, and is made of stainless steel. The top is designed with a 20 μm inner diameter straight nozzle, and several flexible fibers with a certain bending stiffness are fixed to the side, working in conjunction with the nozzle for tunneling. After pumping cleaning fluid at a suitable temperature into the nozzle, the nozzle reaches a certain spray velocity. As the cleaning fluid droplets move upwards on the cleaning rod, they penetrate the hard secretions, and the fibers, acting as friction parts, improve the penetration performance during rotation. Once the penetration channel is formed, the cleaning rod with nozzles on the side can penetrate deep into the nasal cavity for comprehensive cleaning. In the above design, the fibers acting as friction parts are optional; nozzles can be added to the through-type cleaning rod to improve performance; or friction parts can be placed at the top of the cleaning rod.

[0165] The preceding sections focused on designing a single nasal cavity cleaning solution based on the arrangement of the nozzle on the side or top of the cleaning rod. When the nozzle is positioned at the top, an upward-directed jet can splash onto a baffle, forming cleaning fluid particles with a downward velocity. This design is also considered to have a nozzle with a spray angle greater than 90 degrees. The related design can be applied to nozzle designs with spray angles less than 90 degrees. Existing nozzles in this technology occupy too much volume and lack friction elements, resulting in low practicality. Combining this invention with the related design can significantly improve performance. As shown in Figure 31, the friction rod 10713 has a diameter of 1 mm and is made of stainless steel hollow tube. Four hollow short tubes 10722 with a diameter of 0.6 mm are bonded to its side through openings. The nozzle module designed in Figure 25 is fixed to the short tubes through openings. A 0.4 mm outer diameter ring 10723 is welded to the upper part of the cleaning rod. This ring is made of a 0.4 mm diameter stainless steel rod bent into shape, with an outer diameter of 3 mm to accommodate most nostril diameters. A radial rod 10724 is welded inside the ring. A friction part 10700 is located at the top of the ring and the radial rod. The friction part consists of several flexible fibers with a certain bending stiffness, which do not damage nasal hairs during cleaning. Material selection, outer diameter, and length optimization can be achieved through nasal cavity tactile testing. When the friction rod is rotated manually or by an energy conversion drive, the four atomizing nozzles can wet, soften, and decompose hard secretions over a large area, followed by efficient friction cleaning by the fibers. During this process, the nozzle flow rate can be intermittently increased to carry the secretions away from below the nostrils. This working method has significant advantages over existing technologies in situations where the nostrils are severely blocked by hard secretions. The nozzles can also be non-atomizing or other atomizing types. The friction rod can be used in conjunction with the cleaning fluid receiving unit. As shown in Figure 32, the nasal washer has a sealing edge 102, which uses a similar rotary drive design to that in Example 8 of the nasal washer, using a frameless motor for rotational drive. The rotary sealing part includes a rotary sealing pressure plate cavity 126 for fluid supply. The rotating part is controlled by a robotic arm for planar movement and lifting, achieving efficient cleaning of irregular points within the nasal cavity. The diameter of the ring can be further reduced to 1mm for more convenient and comfortable cleaning. The negative pressure control design prevents or inhibits the upward flow of the cleaning fluid, preventing it from entering deep into the nasal cavity.

[0166] The nozzle is not limited to being mounted on the friction rod; it can be mounted on a separate, thinner cleaning rod or fixed to the cleaning fluid receiving part. It can also be combined with the aforementioned various return methods for fluid return. In the above design, the support structure of the friction part can be any shape other than a ring; the friction part is not limited to a structure of multiple elongated protrusions, and can employ various different surface structures. Essentially, the aforementioned friction rod also belongs to the category of motion cleaning rods, achieving localized cleaning of secretions.

[0167] For the fiber design in the friction section, a suitable arrangement direction can be designed to avoid damage to nasal hairs. As shown in Figure 33, the ring 10723 rotates along the v direction, the friction section is a single fiber, the extension direction from the root to the tip of the fiber can be defined as n, the movement direction of the fiber is v1, and the angle between n and v1 can be defined as the friction tilt angle β. A design with β greater than 90 degrees can prevent damage to nasal hairs restricted by hard secretions during friction. β can be designed to be 120-150 degrees. This design is beneficial for selecting fibers with greater bending stiffness for use in high-flow rinsing, and it is also suitable for friction rods with friction sections on the side. In Figure 31, the profile section formed by the ring and radial rods creates the largest flow blockage area. The gap between the ring and the radial rods is still a flow gap, and the flow gap is not part of the flow blockage area. Since the flow rate is largest at the bottom of the cleaning rod, the design can prioritize ensuring that the flow blockage area here is small; for example, the equivalent diameter corresponding to the flow blockage area at the bottom of the friction rod in Figure 31 is 1 mm.

[0168] In this invention, there are various advanced application forms. Form 1 can be a nasal cavity cleaning device, characterized by comprising: a liquid pump, a cleaning rod, a cleaning fluid receiving part, and a return fluid channel; the liquid pump increases the pressure energy of the cleaning fluid, which forces the cleaning fluid to be sprayed out from a nozzle located at one end of the cleaning rod to clean the internal area of ​​the nasal cavity where the nozzle is located, and the cleaning fluid flows out from the corresponding nostril for return; the edge of the cleaning fluid receiving part has a nostril sealing part to seal the gap between the cleaning fluid receiving part and the nostril, and the return fluid channel is connected to an exhaust device for controlling the negative pressure of the nasal cavity relative to the oral cavity, wherein the negative pressure... The system ensures that the nasal cavity receives airflow from the oral cavity during cleaning to assist in fluid return. The nozzle is located on the upper part of the cleaning rod, either on the side or top, with the top nozzle having a spray angle greater than 90 degrees. The cleaning device includes an energy conversion drive for controlling the combined motion of the nozzle or other cleaning parts. These other cleaning parts are used for localized cleaning of the internal area. The combined motion includes the movement of the projection point of the nozzle or other cleaning part on a two-dimensional plane along any specified direction, the raising and lowering of the nozzle or other cleaning part, and the rotation of the nozzle or other cleaning part. The other cleaning parts can be friction cleaning parts, air cleaning parts, or nozzles spraying high-kinetic-energy liquid. The rigid structure at the top of the cleaning rod has a pre-set, narrower outer diameter to reduce irritation to the nasal cavity and provide a flow passage within the nasal cavity.

[0169] In the simplified design described above, only one liquid pump is used for liquid return and cleaning fluid circulation. The total flow rates of the supply and return channels are equal. An exhaust device can be added to handle the total flow rate of the return channel, expelling cleaning fluid and air so that the total flow rate of the return channel exceeds that of the supply channel, thus controlling nasal negative pressure. An air intake pipe can be installed in the return channel adjacent to the nostrils, and this intake pipe can be equipped with a pressure relief device to allow ambient air to be drawn in when the negative pressure exceeds a preset limit. The liquid pump inlet can be connected to the return channel for cleaning fluid circulation, with the exhaust device assisting in negative pressure control. A differential pressure sensor can be connected to the space adjacent to the nostrils in the return channel for adjusting the frequency of the exhaust device or a bypass control valve to control the negative pressure. The cleaning device may include an oral ventilation tube for communication between the oral cavity and ambient air.

[0170] The other cleaning parts may be located on the cleaning rod and simultaneously perform the compound motion with the nozzle. The other cleaning parts may be located on other cleaning rods, and the cleaning rods perform the compound motion; at least part of the liquid supply channels of the other cleaning rods and the cleaning rods are different, and the two may be connected and fixed or rotate relative to each other.

[0171] The energy conversion drive device can be implemented in any manner described herein; it can include multiple servo motors located at the joints of the robotic arm and move the projection point on the two-dimensional plane by controlling the rotation of the joints; or it can move the projection point on the two-dimensional plane by using an XY-axis slide.

[0172] The cleaning fluid can be atomized and sprayed from the nozzle, and there are various ways to achieve atomization. A common feature is that pressure forces the cleaning fluid to flow through a narrow section located in the cleaning rod. During cleaning, the narrow section is located at the top of the cleaning rod and has a preset flow width to accelerate the cleaning fluid, facilitating atomization. The cleaning fluid is then sprayed out from the nozzle in an atomized state. The narrow section can be the nozzle itself or include an internal channel adjacent to the nozzle. A vortex cavity can be provided in front of the narrow section, with a local inner diameter larger than the inner diameter of the narrow section. At least one tangential inlet is provided on the sidewall of the vortex cavity, causing the water flow to rotate around the nozzle axis. The contraction of the vortex cavity increases the rotational speed and facilitates atomization. A mixing chamber can be provided at the rear of the narrow section for mixing the atomized cleaning fluid with air. The cleaning fluid mixed with air is then sprayed out through the rear nozzle. A mixing chamber can be provided in front of the narrow section. The mixing chamber is connected to multiple air inlet channels so that air and cleaning fluid are mixed to form multiple microbubbles for atomization. The cleaning fluid mixed with bubbles flows through the narrow section at an accelerated speed and is sprayed out from the nozzle in an atomized state.

[0173] Form 2 is a simplification of Form 1; it may only include rotational control of the nozzle or other cleaning parts. In this case, a long-fiber friction part can be designed to clean the nasal cavity as a whole; it can also be used in conjunction with a lifting function. Alternatively, a high-energy spray nozzle can be designed, which, when rotated in time, can be used for localized cleaning.

[0174] Form 3 is a simplification of Form 1; it eliminates the need for an energy conversion drive device, focusing instead on atomizing the cleaning fluid nozzle. Combined with nasal air pressure control, this allows for convenient cleaning of the nasal cavity, even when dust is present.

[0175] Form 4 employs a bottom-up cleaning method. It can be a nasal irrigation device, including: a liquid pump, a supply channel, a nozzle, a cleaning liquid receiving section, a return channel, and a friction rod. The liquid pump increases the pressure energy of the cleaning liquid, which forces the cleaning liquid to be sprayed from the nozzle located at one end of the supply channel to clean the internal area of ​​the nasal cavity where the nozzle is located. The cleaning liquid flows out from the corresponding nostril for return. The nozzle has a spray angle of less than 90 degrees. The edge of the cleaning liquid receiving section has a nostril sealing section to seal the gap between the cleaning liquid receiving section and the nostril. An exhaust device is connected in the return channel to control the negative pressure of the nasal cavity relative to the oral cavity. The top of the friction rod has a friction part for localized cleaning of the internal area. The irrigation device includes an energy conversion drive device for controlling the compound motion of the friction rod, which includes the movement of the projection point of the friction rod on a two-dimensional plane along any specified direction, the raising and lowering of the friction rod, and the rotation of the friction rod. The simplified design allows for cleaning with only one liquid pump in the pressurization device, where the cleaning fluid is circulated and the total flow rate of the supply and return channels is equal. Alternatively, various negative pressure designs similar to Design 1 can be used: maintaining negative pressure in the nasal cavity during nasal packing; when the nasal cavity suddenly becomes clear, the control circuit automatically adjusts to increase the total flow rate of the return channel, utilizing the airflow from the mouth to the nasal cavity to provide protection during cleaning.

[0176] In Form 4, the nozzle can employ an atomizing design and can be used in any manner described herein. The vortex chamber and mixing chamber can be located outside the nasal cavity. The nozzle can be located on the friction rod or the receiving part; the full-tube delivery part can be as close as possible to the nozzle. The friction part can adopt any design described herein; it can be designed with a miniature size and used in conjunction with any driving device described herein for non-fixed-point cleaning.

[0177] The nasal irrigation device of the present invention can be combined with various nozzles, cleaning rods, liquid supply, liquid return, atomization, drive, and other design methods of the present invention to optimize or change the form and function of each part; each specific function can be removed and freely combined to form a variety of economical, convenient, or advanced applications. Various design optimizations can be adopted to create aesthetically pleasing and convenient daily necessities. For example, the cleaning rod can be designed as a detachable socket or threaded connection, the connection between each compartment can be changed from bolts to other forms, and an external protective layer can be added; the design can be simplified, for example, as shown in Figure 5, the sealing components of the moving and stationary rings of the nasal irrigation head can be replaced with O-rings when the pressure is not high; for example, an immersion water pump can be placed in the cleaning liquid receiving section, and a hose can be used to supply liquid to the cleaning rod, with the cleaning liquid receiving section also serving as a collection component; the linear motor or part of the limiting shaft in the slide can be located outside the compartment.

[0178] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A nasal cavity cleaning device, characterized in that, include: Liquid pump, cleaning rod, cleaning fluid receiving unit, return fluid channel; A liquid pump increases the pressure energy of the cleaning fluid, which forces the cleaning fluid to be ejected from a nozzle located at one end of the cleaning rod to clean the internal area of ​​the nasal cavity where the nozzle is located. The cleaning fluid flows out from the corresponding nostril for return. The edge of the cleaning fluid receiving part has a nostril sealing part to seal the gap between the cleaning fluid receiving part and the nostril. The return channel is connected to an exhaust device for controlling the negative pressure of the nasal cavity relative to the oral cavity. The negative pressure causes airflow from the oral cavity into the nasal cavity during cleaning to assist in the return of the fluid. The nozzle is located on the upper part of the cleaning rod and is located on the side or top of the cleaning rod. The nozzle at the top has a spray angle greater than 90 degrees. The cleaning device includes an energy conversion drive device for realizing the composite motion control of the nozzle or other cleaning parts. The other cleaning parts are used for local cleaning of the internal area. The composite motion includes the movement of the projection point of the nozzle or other cleaning parts on the two-dimensional plane along any specified direction, the raising and lowering of the nozzle or other cleaning parts, and the rotation of the nozzle or other cleaning parts.

2. The nasal cavity cleaning device according to claim 1, characterized in that, During cleaning, the cleaning rod inside the nasal cavity has a preset shape and outer diameter to reduce irritation to the nasal cavity and to provide a flow passage for the nasal cavity.

3. The nasal cavity cleaning device according to claim 1, characterized in that, The exhaust device discharges cleaning fluid and air, making the total flow rate of the return channel greater than the total flow rate of the supply channel to achieve the negative pressure control.

4. The nasal cavity cleaning device according to claim 3, characterized in that, An air inlet pipe is provided on the return liquid channel, and the air inlet pipe is equipped with a pressure relief device to draw in ambient air when the negative pressure exceeds a preset limit.

5. The nasal cavity cleaning device according to claim 1, characterized in that, The liquid pump inlet is connected to the return liquid channel for cleaning liquid circulation.

6. The nasal cavity cleaning device according to claim 1, characterized in that, A differential pressure sensor is connected to the space adjacent to the nostril in the return channel for adjusting the frequency of the exhaust device or the bypass control valve to control the negative pressure.

7. The nasal cavity cleaning device according to claim 1, characterized in that, The cleaning device includes an oral ventilation tube for connecting the oral cavity to ambient air.

8. The nasal cavity cleaning device according to claim 1, characterized in that, The other cleaning parts are located on the cleaning rod, and the cleaning rod performs the compound movement.

9. The nasal cavity cleaning device according to claim 1, characterized in that, The other cleaning parts are disposed on the cleaning rod other than the cleaning rod, and the cleaning rod performs the compound movement.

10. The nasal cavity cleaning device according to claim 1, characterized in that, The energy conversion drive device includes multiple servo motors, which are located at the joints of the robotic arm. By controlling the rotation of the joints, the projection point on the two-dimensional plane can be moved in any specified direction.

11. The nasal cavity cleaning device according to claim 1, characterized in that, The energy conversion drive device uses an XY-axis slide to move the projection point on the two-dimensional plane along any specified direction.

12. The nasal cavity cleaning device according to claim 1, characterized in that, The energy conversion drive device includes a motor for achieving the rotation control.

13. The nasal cavity cleaning device according to claim 1, characterized in that, The energy conversion drive device includes a motor for implementing the lifting control.

14. The nasal cavity cleaning device according to claim 1, characterized in that, The nozzle or other cleaning parts are controlled by a control circuit to reciprocate within a preset angle range to achieve localized cleaning of secretions.

15. The nasal cavity cleaning device according to claim 1, characterized in that, The pressure forces the cleaning fluid through a narrow section located in the cleaning rod. During cleaning, the narrow section is located at the top of the cleaning rod and has a preset flow width to accelerate the cleaning fluid and facilitate its atomization. The cleaning fluid is then sprayed out from the nozzle in an atomized state.

16. The nasal cavity cleaning device according to claim 15, characterized in that, The narrow section includes an internal channel immediately adjacent to the nozzle.

17. The nasal cavity cleaning device according to claim 15, characterized in that, A vortex cavity is provided in front of the narrow section. The local inner diameter of the vortex cavity is larger than the inner diameter of the narrow section. At least one tangential inlet is provided on the side wall of the vortex cavity so that the water flow rotates around the nozzle axis. The contraction of the vortex cavity increases the rotation speed and facilitates atomization.

18. The nasal cavity cleaning device according to claim 15, characterized in that, The rear of the narrow section is provided with a mixing chamber for mixing atomized cleaning fluid and air, and the cleaning fluid mixed with air is sprayed out through the nozzle at the rear.

19. The nasal cavity cleaning device according to claim 15, characterized in that, A mixing chamber is provided in front of the narrow section, and the mixing chamber is connected to multiple air inlet channels so that air and cleaning fluid are mixed to form multiple microbubbles for atomization; the cleaning fluid mixed with bubbles flows through the narrow section at an accelerated speed and is sprayed out from the nozzle in an atomized state.

20. A nasal cavity cleaning device, characterized in that, include: Liquid pump, cleaning rod, cleaning fluid receiving unit, return fluid channel; A liquid pump increases the pressure energy of the cleaning fluid, which forces the cleaning fluid to be ejected from a nozzle located at one end of the cleaning rod to clean the internal area of ​​the nasal cavity where the nozzle is located. The cleaning fluid flows out from the corresponding nostril for return. The edge of the cleaning fluid receiving part has a nostril sealing part to seal the gap between the cleaning fluid receiving part and the nostril. The return channel is connected to an exhaust device for controlling the negative pressure of the nasal cavity relative to the oral cavity. The negative pressure causes airflow from the oral cavity into the nasal cavity during cleaning to assist in the return of the fluid. The nozzle is located on the upper part of the cleaning rod and is located on the side or top of the cleaning rod. The nozzle at the top has a spray angle greater than 90 degrees. The cleaning device includes an energy conversion drive device for rotational control of the nozzle or other cleaning parts. The other cleaning parts are used for local cleaning of the internal area.

21. The nasal cavity cleaning device according to claim 20, characterized in that, During cleaning, the cleaning rod inside the nasal cavity has a preset shape and outer diameter to reduce irritation to the nasal cavity and to provide a flow passage for the nasal cavity.

22. The nasal cavity cleaning device according to claim 20, characterized in that, The exhaust device discharges cleaning fluid and air, making the total flow rate of the return channel greater than the total flow rate of the supply channel to achieve the negative pressure control.

23. The nasal cavity cleaning device according to claim 22, characterized in that, An air inlet pipe is provided on the return liquid channel, and the air inlet pipe is equipped with a pressure relief device to draw in ambient air when the negative pressure exceeds a preset limit.

24. The nasal cavity cleaning device according to claim 20, characterized in that, The liquid pump inlet is connected to the return liquid channel for cleaning liquid circulation.

25. The nasal cavity cleaning device according to claim 20, characterized in that, A differential pressure sensor is connected to the space adjacent to the nostril in the return channel for adjusting the frequency of the exhaust device or the bypass control valve to control the negative pressure.

26. The nasal cavity cleaning device according to claim 20, characterized in that, The cleaning device includes an oral ventilation tube for connecting the oral cavity to ambient air.

27. The nasal cavity cleaning device according to claim 20, characterized in that, The other cleaning part is a friction cleaning part, which includes multiple elongated protrusions for cleaning local secretions.

28. The nasal cavity cleaning device according to claim 20, characterized in that, The pressure forces the cleaning fluid through a narrow section located in the cleaning rod. During cleaning, the narrow section is located at the top of the cleaning rod and has a preset flow width to accelerate the cleaning fluid and facilitate its atomization. The cleaning fluid is then sprayed out from the nozzle in an atomized state.

29. The nasal cavity cleaning device according to claim 28, characterized in that, The narrow section includes an internal channel immediately adjacent to the nozzle.

30. The nasal cavity cleaning device according to claim 28, characterized in that, A vortex cavity is provided in front of the narrow section. The local inner diameter of the vortex cavity is larger than the inner diameter of the narrow section. At least one tangential inlet is provided on the side wall of the vortex cavity so that the water flow rotates around the nozzle axis. The contraction of the vortex cavity increases the rotation speed and facilitates atomization.

31. The nasal cavity cleaning device according to claim 28, characterized in that, The rear of the narrow section is provided with a mixing chamber for mixing atomized cleaning fluid and air, and the cleaning fluid mixed with air is sprayed out through the nozzle at the rear.

32. The nasal cavity cleaning device according to claim 28, characterized in that, A mixing chamber is provided in front of the narrow section, and the mixing chamber is connected to multiple air inlet channels so that air and cleaning fluid are mixed to form multiple microbubbles for atomization; the cleaning fluid mixed with bubbles flows through the narrow section at an accelerated speed and is sprayed out from the nozzle in an atomized state.

33. The nasal cavity cleaning device according to claim 20, characterized in that, The other cleaning parts are located on the cleaning rod, which is driven by the energy conversion drive device and causes the nozzle and other cleaning parts to rotate.

34. The nasal cavity cleaning device according to claim 20, characterized in that, The other cleaning parts are disposed on the cleaning rod outside the cleaning rod, and the cleaning rod is driven by the energy conversion drive device to drive the other cleaning parts to rotate.

35. The nasal cavity cleaning device according to claim 20, characterized in that, The energy conversion drive device is an electric motor.

36. The nasal cavity cleaning device according to claim 20, characterized in that, The liquid supply channel or return channel of the cleaning device has a sliding sealing element to prevent the cleaning liquid from leaking during the rotation of the cleaning rod; the nozzle or other cleaning part rotates freely relative to the cleaning liquid receiving part under the drive of the energy conversion drive device.

37. The nasal cavity cleaning device according to claim 20, characterized in that, The nozzle or other cleaning parts are controlled by a control circuit to reciprocate within a preset angle range to achieve localized cleaning of secretions.

38. The nasal cavity cleaning device according to claim 20, characterized in that, The nasal irrigation device also includes a lifting function for the nozzle or other cleaning parts.

39. A nasal cavity cleaning device, characterized in that, include: Liquid pump, cleaning rod, cleaning fluid receiving unit, return fluid channel; A liquid pump increases the pressure energy of the cleaning fluid, which forces the cleaning fluid to be sprayed from a nozzle located at one end of the cleaning rod to clean the internal area of ​​the nasal cavity where the nozzle is located. The cleaning fluid flows out from the corresponding nostril for return. The edge of the cleaning fluid receiving part has a nostril sealing part to seal the gap between the cleaning fluid receiving part and the nostril. The return channel is connected to an exhaust device for controlling the negative pressure of the nasal cavity relative to the oral cavity. The negative pressure causes airflow from the oral cavity to assist the return of the fluid during cleaning. The nozzle is located on the upper part of the cleaning rod and is located on the side or top of the cleaning rod. The nozzle at the top has a spray angle greater than 90 degrees. The cleaning fluid is sprayed out from the nozzle in an atomized state, so that the cleaning fluid particles fill all or part of the nasal cavity for cleaning. The cleaning of the part of the nasal cavity is assisted by the rotation or lifting of the cleaning rod.

40. The nasal cavity cleaning device according to claim 39, characterized in that, During cleaning, the cleaning rod inside the nasal cavity has a preset shape and outer diameter to reduce irritation to the nasal cavity and to provide a flow passage for the nasal cavity.

41. The nasal cavity cleaning device according to claim 39, characterized in that, The exhaust device discharges cleaning fluid and air, making the total flow rate of the return channel greater than the total flow rate of the supply channel to achieve the negative pressure control.

42. The nasal cavity cleaning device according to claim 41, characterized in that, An air inlet pipe is provided on the return liquid channel, and the air inlet pipe is equipped with a pressure relief device to draw in ambient air when the negative pressure exceeds a preset limit.

43. The nasal cavity cleaning device according to claim 39, characterized in that, The liquid pump inlet is connected to the return liquid channel for cleaning liquid circulation.

44. The nasal cavity cleaning device according to claim 39, characterized in that, A differential pressure sensor is connected to the space adjacent to the nostril in the return channel for adjusting the frequency of the exhaust device or the bypass control valve to control the negative pressure.

45. The nasal cavity cleaning device according to claim 39, characterized in that, The cleaning device includes an oral ventilation tube for connecting the oral cavity to ambient air.

46. ​​The nasal cavity cleaning device according to claim 39, characterized in that, The pressure forces the cleaning fluid through a narrow section located in the cleaning rod. During cleaning, the narrow section is located at the top of the cleaning rod and has a preset flow width to accelerate the cleaning fluid and facilitate its atomization. The cleaning fluid is then sprayed out from the nozzle in an atomized state.

47. The nasal cavity cleaning device according to claim 46, characterized in that, The narrow section includes an internal channel immediately adjacent to the nozzle.

48. The nasal cavity cleaning device according to claim 46, characterized in that, A vortex cavity is provided in front of the narrow section. The local inner diameter of the vortex cavity is larger than the inner diameter of the narrow section. At least one tangential inlet is provided on the side wall of the vortex cavity so that the water flow rotates around the nozzle axis. The contraction of the vortex cavity increases the rotation speed and facilitates atomization.

49. The nasal cavity cleaning device according to claim 46, characterized in that, The rear of the narrow section is provided with a mixing chamber for mixing atomized cleaning fluid and air, and the cleaning fluid mixed with air is sprayed out through the nozzle at the rear.

50. The nasal cavity cleaning device according to claim 46, characterized in that, A mixing chamber is provided in front of the narrow section, and the mixing chamber is connected to multiple air inlet channels so that air and cleaning fluid are mixed to form multiple microbubbles for atomization; the cleaning fluid mixed with bubbles flows through the narrow section at an accelerated speed and is sprayed out from the nozzle in an atomized state.

51. A nasal cavity cleaning device, characterized in that, include: Liquid pump, liquid supply channel, nozzle, cleaning fluid receiving unit, return channel, friction rod; A liquid pump increases the pressure energy of the cleaning fluid, which forces the cleaning fluid to be sprayed out from a nozzle located at one end of the supply channel to clean the internal area of ​​the nasal cavity where the nozzle is located. The cleaning fluid flows out from the corresponding nostril for return. The nozzle has a spray angle of less than 90 degrees. The cleaning fluid receiving part has a nasal sealing part at its edge to seal the gap between the cleaning fluid receiving part and the nasal cavity. An exhaust device is connected in the return fluid channel to control the negative pressure of the nasal cavity relative to the oral cavity. The top of the friction rod has a friction part for local cleaning of the internal area. The cleaning device includes an energy conversion drive device for realizing the composite motion control of the friction rod. The composite motion includes the movement of the projection point of the friction rod on the two-dimensional plane along any specified direction, the raising and lowering of the friction rod, and the rotation of the friction rod.

52. The nasal cavity cleaning device according to claim 51, characterized in that, During cleaning, the lower rigid structure of the friction rod inside the nasal cavity has a preset shape and outer diameter to reduce irritation to the nasal cavity and to provide a flow passage for the nasal cavity.

53. The nasal cavity cleaning device according to claim 51, characterized in that, The exhaust device discharges cleaning fluid and air, making the total flow rate of the return channel greater than the total flow rate of the supply channel to achieve the negative pressure control.

54. The nasal cavity cleaning device according to claim 53, characterized in that, An air inlet pipe is provided on the return liquid channel, and the air inlet pipe is equipped with a pressure relief device to draw in ambient air when the negative pressure exceeds a preset limit.

55. The nasal cavity cleaning device according to claim 51, characterized in that, The liquid pump inlet is connected to the return liquid channel for cleaning liquid circulation.

56. The nasal cavity cleaning device according to claim 51, characterized in that, A differential pressure sensor is connected to the space adjacent to the nostril in the return channel for adjusting the frequency of the exhaust device or the bypass control valve to control the negative pressure.

57. The nasal cavity cleaning device according to claim 51, characterized in that, The pressure forces the cleaning fluid through a narrow section in the supply channel; the narrow section has a preset flow width to accelerate the cleaning fluid and facilitate its atomization, and the cleaning fluid is sprayed out from the nozzle in an atomized state.

58. The nasal cavity cleaning device according to claim 57, characterized in that, The narrow section includes an internal channel immediately adjacent to the nozzle.

59. The nasal cavity cleaning device according to claim 57, characterized in that, A vortex cavity is provided in front of the narrow section. The local inner diameter of the vortex cavity is larger than the inner diameter of the narrow section. At least one tangential inlet is provided on the side wall of the vortex cavity so that the water flow rotates around the nozzle axis. The contraction of the vortex cavity increases the rotation speed and facilitates atomization.

60. The nasal cavity cleaning device according to claim 57, characterized in that, The rear of the narrow section is provided with a mixing chamber for mixing atomized cleaning fluid and air, and the cleaning fluid mixed with air is sprayed out through the nozzle at the rear.

61. The nasal cavity cleaning device according to claim 57, characterized in that, A mixing chamber is provided in front of the narrow section, and the mixing chamber is connected to multiple air inlet channels so that air and cleaning fluid are mixed to form multiple microbubbles for atomization; the cleaning fluid mixed with bubbles flows through the narrow section at an accelerated speed and is sprayed out from the nozzle in an atomized state.

62. The nasal cavity cleaning device according to claim 51, characterized in that, The nozzle is located on the friction rod.

63. The nasal cavity cleaning device according to claim 51, characterized in that, The friction part includes multiple elongated protrusions for friction cleaning.

64. The nasal cavity cleaning device according to claim 51, characterized in that, The energy conversion drive device includes multiple servo motors, which are located at the joints of the robotic arm. By controlling the rotation of the joints, the projection point on the two-dimensional plane can be moved in any specified direction.

65. The nasal cavity cleaning device according to claim 51, characterized in that, The energy conversion drive device uses an XY-axis slide to move the projection point on the two-dimensional plane along any specified direction.

66. The nasal cavity cleaning device according to claim 51, characterized in that, The energy conversion drive device includes a motor for implementing the rotation control.

67. The nasal cavity cleaning device according to claim 51, characterized in that, The energy conversion drive device includes a motor for implementing the lifting control.

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