Positive and negative pressure nasal washing device

Abstract

The application discloses a positive and negative pressure nasal washing device, which comprises a liquid storage tank, a main machine and a waste liquid tank arranged in sequence from top to bottom; the liquid storage tank stores clean water or medicinal liquid, and the waste liquid tank stores sewage after nasal cavity flushing; the main machine is located between the liquid storage tank and the waste liquid tank, and is detachably connected with the liquid storage tank and the waste liquid tank; the main machine comprises a main machine body, a containing cavity and a nasal washing head; the main machine body and a support are installed in the containing cavity, the main machine body is provided with a water pump, an air pump and a PCB circuit board, and the PCB circuit board is connected with the water pump and the air pump. The nasal washing head assembly of the application is fixed on the main machine and can be detached, can rotate by 360 degrees, and the water inlet and water outlet positions are transposed, so that both left and right nostrils can be cleaned, and the water flow and pressure size during starting and running can be controlled, and the nasal washing comfort is improved.

Description

Technical Field

[0001] This application relates to everyday consumer goods, specifically a positive and negative pressure nasal irrigator. Background Technology

[0002] A nasal irrigator is a tool used to clean the nasal cavity. It typically uses pressure (either a bag-type nasal irrigator, a simple bottle-type irrigator using gravity, or a mechanical pressure such as an electric one) to deliver saline solution into the nostrils. The solution flows through the nasal vestibule (the part exposed outside the head), sinuses, and nasal passages, bypassing the nasopharynx, and exiting either through one nostril or the mouth. Through this pathway, the saline solution itself, along with the force of the water flow, removes accumulated pathogens and impurities from the nasal cavity, restoring its normal physiological environment and self-detoxification function, thus protecting the nasal cavity.

[0003] Existing nasal irrigators fail to achieve a balance between water output and intake, and excessive water flow can impact the nasal mucosa, potentially causing choking due to improper control. This poses a safety hazard to infants or inexperienced users. Furthermore, existing nasal irrigator heads are inconvenient to install and remove, and cannot be rotated. Most lack a complete independent waste liquid collection design, allowing it to flow freely or resulting in a mixture of waste and clean liquid. This causes waste liquid to flow into the bottle and onto the user, contaminating and wasting the clean liquid, and potentially leading to hygiene problems. Therefore, it is necessary to improve the structure of existing technologies. Utility Model Content

[0004] To address the aforementioned issues, this application provides a positive and negative pressure nasal irrigator to overcome, or at least partially overcome, the shortcomings of the prior art.

[0005] This application provides a positive and negative pressure nasal irrigator, which includes a liquid storage tank, a main unit, and a waste liquid tank arranged sequentially from top to bottom. The storage tank stores clean water or medicine, while the waste tank stores wastewater after nasal irrigation. The main unit is located between the liquid storage tank and the waste liquid tank, and the main unit is detachably connected to the liquid storage tank and the waste liquid tank respectively; The host includes a host body, a receiving cavity, and a nasal irrigation tip; The main unit and bracket are installed in the receiving cavity. The main unit has a water pump, an air pump, and a PCB circuit board. The PCB circuit board is connected to both the water pump and the air pump. A microcontroller and a drive circuit adapted to the water pump and the air pump are provided on the PCB circuit board. The microcontroller is connected to the water pump and the air pump respectively through the drive circuit. The microcontroller outputs a flow control signal to the drive circuit. The drive circuit receives the flow control signal and controls the operating speed of the air pump and / or the water pump according to the flow control signal.

[0006] In one embodiment, the bracket is provided with an upper fixed seat, a lower fixed seat, and reserved water holes and air holes. The upper fixed seat and the lower fixed seat are both U-shaped and have receiving grooves. The edge of the receiving groove has a buckle. The receiving groove of the upper and lower fixed seats holds the water pump and / or air pump. The water pump and / or air pump are fixed by the buckle on the edge of the receiving groove. The water hole is connected to the water pump. The air hole is connected to the air pump through the air inlet pipe of the air pump.

[0007] In one embodiment, the nasal washer is detachably and / or rotatably connected to the main unit; the nasal washer includes a nasal washer base and a water inlet, a water outlet, and an air inlet mounted on the nasal washer base; the water inlet is connected to the water outlet pipe of a water pump, the water outlet flows into a waste liquid tank through another water outlet pipe, the air inlet is connected to the air outlet pipe of an air pump, and the nasal washer base is detachably connected to the outside of the main unit.

[0008] In one embodiment, the water inlet on the nasal rinse head is detachably connected to a water inlet nozzle, and the water outlet is detachably connected to a water outlet nozzle. The water inlet nozzle and the water outlet nozzle are conical structures, and the front ends of the water inlet nozzle and the water outlet nozzle are oblique or umbrella-shaped. The water inlet of the water inlet nozzle is larger than the water outlet of the water outlet nozzle.

[0009] In one embodiment, the water pump's inlet pipe is connected to the storage tank, the water pump's outlet pipe is connected to the water hole of the bracket, the water pump's outlet pipe and the water hole on the bracket are sealed together by an O-ring, and the water pump's outlet pipe is then connected to the inlet of the nasal rinse head through the water hole on the bracket. The air pump's inlet pipe is connected to the air hole on the bracket, and the air pump's inlet pipe and the air hole on the bracket are sealed together by an O-ring. The air pump's outlet pipe is connected to the air inlet of the nasal rinse head.

[0010] In one embodiment, the bracket is fixed to the bottom of the receiving cavity by screws.

[0011] In one embodiment, the main unit further has a top cover, which is snapped onto the receiving cavity and isolated from the liquid storage tank above the main unit. The bottom of the receiving cavity is provided with an air outlet and a water inlet, and the top cover is provided with a water inlet and an air outlet corresponding to the bottom of the cavity. The main unit draws water from the liquid storage tank through the water inlet of the top cover.

[0012] In one embodiment, the main unit also includes a battery and a charging dock.

[0013] In one embodiment, the lower part of the liquid storage tank has a sealing ring, the lower part of the liquid storage tank is fixed to the main unit by a rotating buckle, and silicone rings are installed on the upper and lower parts of the main unit.

[0014] In one embodiment, the waste liquid tank is provided with a drainage hole on the upper part, and multiple drainage holes are symmetrically arranged. The position of the drainage hole is connected to the side of the waste liquid tank by an inclined plane.

[0015] The above-described technical solutions adopted in the embodiments of this application can achieve the following beneficial effects: The nose washing device in this application is fixed to the main unit and can be detached. It can rotate 360 ​​degrees, and the water inlet and outlet positions can be reversed, so that both nostrils can be cleaned.

[0016] The PCB circuit board is used to control the DC water pump to start and run at the set speed, and the PCBA board software controls the water flow and pressure to achieve a comfortable nasal wash.

[0017] The cleaning solution is output in the form of water mist and gathers in the nasal mucosa to form a water flow to clean and care for the nasal cavity. The advantage of this cleaning method is that the cleaning process is gentler and less likely to cause damage to the nasal mucosa or choking.

[0018] The nasal irrigator of this application enables the nasal irrigator to spray cleaning fluid from two nasal irrigator heads simultaneously to rinse the nasal cavity, and enables the recycling of waste fluid. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 A schematic diagram of a positive and negative pressure nasal irrigator according to one embodiment of this application is shown (I).

[0020] Figure 2 It shows that according to Figure 1 A top view of a positive and negative pressure nasal irrigator.

[0021] Figure 3 A schematic diagram of the cross-section of a positive and negative pressure nasal irrigator is shown.

[0022] Figure 4 A schematic diagram (II) of a positive and negative pressure nasal irrigator according to one embodiment of this application is shown.

[0023] Figure 5 An assembly diagram of a positive and negative pressure nasal irrigator according to an embodiment of this application is shown.

[0024] Figure 6 The internal structure diagram of the host is shown.

[0025] The attached figures are labeled as follows: Nasal irrigator 100, liquid storage tank 10, waste liquid tank 20, main unit 30, receiving cavity 31, nasal irrigator head 32, water pump 33, air pump 34, battery 35, PCB circuit board 36, charging base 37, display screen 38, water inlet pipe A, water outlet pipe B, air inlet pipe C, air outlet pipe D, water inlet nozzle 321, water outlet nozzle 322, liquid inlet 11, sealing cap 12. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] The technical solutions provided by the various embodiments of this application are described in detail below with reference to the accompanying drawings.

[0028] like Figure 1-6 As shown, the positive and negative pressure nasal irrigator of this application includes a liquid storage tank 10, a waste liquid tank 20, and a main unit 30, which are arranged sequentially from top to bottom; the liquid storage tank 10 is detachably or fixedly connected to the top of the main unit 30, and the waste liquid tank 20 is detachably connected to the bottom of the main unit 30.

[0029] The nasal irrigator described in this application can be either a positive pressure nasal irrigator or a positive and negative pressure nasal irrigator. A positive and negative pressure nasal irrigator is a medical device that irrigates the nasal cavity by alternately generating positive and negative pressure. Its principle combines fluid dynamics and pressure control technology and is suitable for nasal cavity cleaning, inflammation treatment or postoperative care.

[0030] Positive pressure nasal irrigators generate gentle positive pressure (above atmospheric pressure) to inject saline or medicated solution into one nostril, using the flow of the liquid to flush out secretions, allergens, or germs from the nasal cavity, which are then expelled from the other nostril or mouth. The irrigator switches to negative pressure (below atmospheric pressure) to suction out any remaining fluid, pus, or sloughed tissue from the nasal cavity. This alternation of positive and negative pressure mimics the rhythm of natural breathing, reducing irritation to the nasal mucosa, making it especially suitable for children or people with sensitive skin.

[0031] like Figures 1-4The diagram shows a positive and negative pressure nasal irrigator. The main unit 30 has a receiving cavity 31, a main body, a top cover, and a nasal irrigation head 32. The nasal irrigation head 32 is detachably connected to and / or rotatably connected to the main unit 30. The top cover is snapped onto the receiving cavity 31 and is isolated from the liquid storage tank 10 above the main unit 30. The bottom of the receiving cavity 31 is provided with an air outlet and a water inlet. The top cover is provided with a water inlet A corresponding to the bottom of the cavity and an air outlet. The main unit 30 draws water from the liquid storage tank 10 through the water inlet of the top cover.

[0032] In this application, as Figure 3 As shown, in the positive and negative pressure nasal irrigator structure, the main body is installed in the receiving cavity 31. The main body has a water pump 33, an air pump 34, a battery 35, a PCB circuit board 36, and a charging base 37. The water pump 33 and the air pump 34 are connected to the battery 35. A bracket is also provided in the receiving cavity 31. The bracket is provided with an upper fixed seat, a lower fixed seat, and reserved water holes and air holes. The two fixed seats are stacked on top of each other. The upper and lower fixed seats are both U-shaped and have receiving grooves. The edges of the receiving grooves have buckles. In one embodiment of this application, the water pump 33 is installed in the receiving groove of the upper fixed seat and is fixed by the buckles on the edge of the receiving groove. The air pump 34 is installed in the receiving groove of the lower fixed seat and is fixed by the buckles on the edge of the receiving groove.

[0033] In this application, the water pump 33 is a DC water pump, the inlet pipe of the water pump 33 is connected to the outlet of the liquid storage tank 10, and the outlet pipe of the water pump 33 is connected to the nasal rinse head 32.

[0034] The air pump 34 in this application is a miniature air pump, with an adjustable pressure range typically between positive pressure and -20 kPa, ensuring safety and effectiveness. Liquid injection and extraction paths are separated to avoid cross-contamination, and some devices are equipped with a one-way valve to control the flow direction.

[0035] In this application, the PCB circuit board 36 of the nasal irrigator is provided with a microcontroller and a drive circuit adapted to the water pump and air pump. The microcontroller is connected to the water pump and air pump respectively through the drive circuit. The microcontroller outputs a flow control signal to the drive circuit. The drive circuit receives the control signal and controls the operating speed of the air pump and / or water pump according to the control signal.

[0036] The flow control signal of the microcontroller can control the drive circuit to drive the nasal irrigation tip 32 to generate water mist to clean the nasal cavity, as described in this application. A PCB circuit board 36 is disposed on one side of the water pump 33, and the water pump 33 is electrically connected to the PCB circuit board 36. The microcontroller and drive circuit are both mounted on the PCB circuit board 36. The microcontroller is connected to the water pump 33 or the air pump, and is used to control the DC water pump and / or air pump to start and run at a set speed to improve user comfort.

[0037] In one embodiment of this application, the flow control module can realize closed-loop PID control. The water pump is equipped with a water flow sensor, and the air pump is equipped with an airflow sensor. Both the airflow sensor and the water flow sensor are electrically connected to the microcontroller. The microcontroller acquires the airflow and water flow data collected by the airflow sensor and the water flow sensor in real time, and generates a flow control signal based on the collected airflow and water flow data. In this application, the flow control signal can be a pulse width modulation signal, such as a PWM duty cycle signal or a PWM frequency signal.

[0038] In another embodiment of this application, in order to obtain a better user experience, a standard flow meter is used to record the actual flow rate under different PWM duty cycles to generate a flow-PWM lookup table or fitting curve equation, and the parameters are written into a microcontroller, so that the microcontroller generates a flow control signal based on the collected airflow and water flow data. The microcontroller outputs the flow control signal to the drive circuit, and the drive circuit controls the DC water pump and / or air pump to start and run at a set speed according to the flow control signal, thereby controlling the water flow rate and pressure to achieve the purpose of comfortable nasal washing.

[0039] In this application, the starting speed of the DC water pump is set to 2500-4000 rpm and it runs for N seconds; after the DC water pump starts running for N seconds, its speed accelerates linearly for N seconds, and after running linearly for N seconds, it runs in a stable state for N seconds and then stops running.

[0040] In this application, the water inlet nozzle 321 of the nasal irrigator 32 is connected to the water inlet pipe. Driven by the drive circuit, the cleaning fluid in the water tank can flow out to the nozzle, which can convert the liquid cleaning fluid into a fine water mist and spray it out. The nozzle can also be adjusted in direction and angle as needed. Therefore, compared with ordinary nasal irrigators, the spray speed of this utility model is more stable, the cleaning method is gentler, and the nasal cavity can be cleaned by spraying a stable water mist from the nozzle. The positive and negative pressure nasal irrigator of this application controls the water flow and pressure through the PCBA circuit board to achieve a comfortable nasal irrigation. When turned on, the water flow is very small for 3-4 seconds, the pressure increases linearly from 4-6 seconds, and after 6 seconds the water flow reaches 120 seconds and maintains a consistent flow rate per second. Both positive and negative pressure nasal irrigators provide a very comfortable nasal irrigation experience. like Figure 4 The diagram shows a positive and negative pressure nasal irrigator. The nasal irrigator head 32 includes a nasal irrigator base and a water inlet, a water outlet, and an air inlet installed on the nasal irrigator base. The water inlet is connected to the water outlet pipe of the water pump 33, and the water outlet flows into the waste liquid tank 20 through another water outlet pipe. The air inlet is connected to the air outlet pipe of the air pump 34. The nasal irrigator base is detachably connected to the outside of the main unit 30.

[0041] The nasal irrigation tip 32 has a three-hole design. The water inlet is connected to the water outlet pipe B of the water pump 33, and the water flows into the waste liquid tank 20 through the water outlet pipe C. The air inlet is connected to the air outlet pipe of the air pump 34 and is used to inject air (positive pressure assistance) or generate negative pressure suction.

[0042] In this application, a water inlet nozzle 321 is detachably connected to the water inlet for easy cleaning, and a water outlet nozzle 322 is detachably connected to the water outlet for discharging the rinsing fluid or switching to the water inlet (via a 360° rotation function). The water inlet nozzle 321 and water outlet nozzle 322 have a conical structure, with one end of the water outlet nozzle 322 connected to the waste liquid tank 20. The front ends of the water inlet nozzle 321 and water outlet nozzle 322 are often designed with an angled or umbrella-shaped tip to avoid excessive insertion and damage to the mucous membrane. The water inlet nozzle 321 and water outlet nozzle 322 are made of a soft material (such as silicone) to accommodate different nostril sizes.

[0043] The nasal irrigation nozzle is detachable from the main unit 30. The nasal irrigation nozzle 32 is fixed to the main unit 30 by rotation and supports 360° rotation, so that the positions of the water inlet / outlet nozzles 322 can be interchanged to adapt to the needs of the left and right nostrils or different rinsing directions.

[0044] like Figure 4-6 As shown, water pump 33 is a power system of this application. Water pump 33 has an inlet pipe A and an outlet pipe B. Inlet pipe A draws liquid from the storage tank 10, the liquid being, for example, physiological saline. Outlet pipe B delivers the liquid to the inlet port of nasal irrigation head 32. Air pump 34 is another power system of this application. Air pump 34 has an air inlet pipe C and an air outlet pipe D. Air inlet pipe C draws in air from the outside (or through a pre-drilled hole in the bracket). Air outlet pipe D connects to the air inlet port of nasal irrigation head 32, providing positive pressure airflow assistance or negative pressure suction (the operating mode of air pump 34 needs to be switched).

[0045] Specifically: the water inlet pipe A of the water pump 33 is connected to the liquid storage tank 10, the water outlet pipe B of the water pump 33 is connected to the water hole of the bracket, the water outlet pipe B and the water hole on the bracket are sealed together by an O-ring, the water outlet pipe B is then connected to the water inlet of the nasal rinse head 32 through the water hole on the bracket, the air inlet pipe C of the air pump 34 is connected to the air hole on the bracket, the air inlet pipe C and the air hole on the bracket are sealed together by an O-ring, and the air outlet pipe D of the air pump 34 is connected to the air inlet of the nasal rinse head 32.

[0046] In this application, the bracket is fixed to the main body by screws, specifically to the bottom of the receiving cavity 31.

[0047] The water inlet of the inlet nozzle 321 is larger than the water outlet of the outlet nozzle 322, resulting in a smoother flow and a better user experience. In the structure of the positive and negative pressure nasal irrigator, the inlet pipe and outlet pipe inside the nasal irrigator head 32 are isolated and not connected. Figure 3 Water flows out through the blue channel and then through the yellow channel into water tank B.

[0048] During use, the user fills the saline solution tank 10 and installs the nasal irrigation tip. Selecting the pressure setting and starting the electric pump, the liquid is forced into the nozzle through the tubing. The liquid flows into one nasal cavity at the set pressure and exits through the nasal passage to the other side or the mouth, carrying away secretions. The device automatically stops or can be manually shut off; any remaining liquid is drained by gravity.

[0049] In this application, the nozzle and the nostril have an anti-backflow design, and the contact part between the nozzle and the nostril forms a seal to reduce liquid splashing.

[0050] In this application, as Figure 5 As shown, the liquid storage tank 10 and the waste liquid tank 20 are arranged vertically and are both detachably connected to the main unit 30. The liquid storage tank 10 and the waste liquid tank 20 are sealed when connected to the main unit 30. The lower part of the liquid storage tank 10 has a sealing ring, and the lower part of the liquid storage tank 10 is snapped and fixed to the main unit 30 by a rotatable snap. Silicone rings are also installed on the upper and lower parts of the main unit 30. The main unit 30 is pressed tightly against the liquid storage tank 10 and the waste liquid tank 20 from top to bottom to seal them. The seal is achieved through the silicone rings to prevent water leakage.

[0051] In this application, the upper part of the liquid storage tank 10 is a liquid inlet 11, and a sealing cap 12 is installed on the liquid inlet 11. The liquid inlet 11 protrudes from the upper surface of the liquid storage tank 10. The upper part of the waste liquid tank 20 is provided with two drain holes, which are symmetrically arranged. The position of the drain holes is connected to the side of the waste liquid tank 20 at an angle. When cleaning, the waste liquid tank 20 is removed, and when the waste liquid inside is poured out, the liquid in the tank flows out along the drain holes, preventing wastewater from being stored in the waste liquid tank 20.

[0052] In this application, the host 30 has a display screen 38 on its side, which is electrically connected to the PCB circuit board 36. The display screen 38 has gear and mode selection buttons and a power switch button.

[0053] In this application, the liquid storage tank 10 is made of transparent medical-grade material for easy observation of the liquid level, and its bottom is connected to the water inlet pipe (A) of the water pump 33. A bracket is installed inside the housing 31 of the main unit 30. The bracket is used to fix the air pump 34, the water pump 33 and the pipelines connected to the air pump 34 and the water pump 33. The bracket has reserved water holes and air holes (air inlets). The air holes are connected to the air inlet pipe C of the air pump to keep the air clean.

[0054] The working principle of the positive and negative pressure nasal irrigator in this application in positive pressure mode is as follows: Liquid path: When the water pump 33 is started, the liquid in the storage tank 10 flows from the inlet pipe A under the suction force of the water pump 33, and under the pressure of the water pump 33, it enters the inlet nozzle 321 through the outlet pipe B, and then is discharged from the outlet nozzle 322 through the nasal cavity. The outlet hole of the outlet nozzle 322 is connected to the outlet pipe C, and the waste liquid enters the waste liquid tank 20 through the outlet pipe C.

[0055] Gas path: Air pump 34 synchronously injects air (positive pressure), which enters the nasal rinse head 32 through the air inlet and mixes with the liquid to form atomized rinsing or enhance the rinsing force.

[0056] The working principle of the positive and negative pressure nasal irrigator in this application in negative pressure mode is as follows: When the air pump 34 reverses, it switches to suction mode, drawing out residual liquid from the nasal cavity through the air inlet and discharging it into the waste liquid tank 20 through the air outlet pipe D of the air pump 34.

[0057] Liquid pause: Water pump 33 stops to prevent liquid backflow.

[0058] The nasal irrigation head 32 of the positive and negative pressure nasal irrigator of this application can switch the inlet and outlet directions. By rotating the nasal irrigation head 32, the original water outlet nozzle 322 becomes the water inlet end, and the original water inlet nozzle 321 becomes the outlet end, realizing reverse rinsing (suitable for special nasal cavity structure requirements).

[0059] This application's positive and negative pressure nasal irrigator features a dual-pump structure (water pump + air pump), achieving a balance between water output and suction for a more comfortable nasal irrigation experience. The nasal irrigator of this application can also be selected as a positive pressure nasal irrigator, using only a water pump and not an air pump 34.

[0060] In this embodiment of the invention, the nasal irrigation head 32 is connected to the main unit 30 of the nasal irrigator. The main unit can pump liquid into the nasal irrigation head 32, which is equipped with a nozzle. The nozzle abuts against and seals the nasal cavity. The liquid outlet channel of the nasal irrigation head 32 or the nozzle allows the liquid pumped into the nasal irrigation head 32 by the main unit to flow out into the nasal cavity, thereby cleaning the nasal cavity. During cleaning, the nozzle can seal the nasal cavity, allowing the liquid to act on the nasal cavity as much as possible, improving the liquid utilization rate and resulting in a better cleaning effect. At the same time, a return channel is provided in the nozzle, which allows the liquid in the nasal cavity to flow out, realizing the depressurization of the nasal cavity. In this way, it can prevent the liquid in the nasal cavity from not being able to drain in time, which would cause the liquid to accumulate at the liquid outlet channel, ensuring that the liquid can flow out of the liquid outlet channel and resulting in a better cleaning effect.

[0061] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A positive and negative pressure nasal irrigator, characterized in that, The nasal irrigator includes a liquid storage tank, a main unit, and a waste liquid tank arranged from top to bottom; The storage tank stores clean water or medicine, while the waste tank stores wastewater after nasal irrigation. The main unit is located between the liquid storage tank and the waste liquid tank, and the main unit is detachably connected to the liquid storage tank and the waste liquid tank respectively; The host includes a host body, a receiving cavity, and a nasal irrigation tip; The main unit and bracket are installed in the receiving cavity. The main unit has a water pump, an air pump, and a PCB circuit board. The PCB circuit board is connected to both the water pump and the air pump. A microcontroller and a drive circuit adapted to the water pump and the air pump are provided on the PCB circuit board. The microcontroller is connected to the water pump and the air pump respectively through the drive circuit. The microcontroller outputs a flow control signal to the drive circuit. The drive circuit receives the flow control signal and controls the operating speed of the air pump and / or the water pump according to the flow control signal.

2. The positive and negative pressure nasal irrigator as described in claim 1, characterized in that, The bracket is provided with an upper fixed seat, a lower fixed seat, and reserved water holes and air holes. The upper fixed seat and the lower fixed seat are both U-shaped and have receiving grooves. The edge of the receiving groove has a buckle. The receiving groove of the upper and lower fixed seats holds the water pump and / or air pump. The water pump and / or air pump are fixed by the buckle on the edge of the receiving groove. The water hole is connected to the water pump. The air hole is connected to the air pump through the air inlet pipe of the air pump.

3. The positive and negative pressure nasal irrigator as described in claim 1, characterized in that, The nasal washer head is detachably and / or rotatably connected to the main unit; the nasal washer head includes a nasal washer head base and a water inlet, a water outlet, and an air inlet installed on the nasal washer head base. The water inlet is connected to the water outlet pipe of the water pump, and the water outlet flows into the waste liquid tank through another water outlet pipe. The air inlet is connected to the air outlet pipe of the air pump. The nasal washer head base is detachably connected to the outside of the main unit.

4. The positive and negative pressure nasal irrigator as described in claim 3, characterized in that, The water inlet on the nasal rinse head is detachably connected to a water inlet nozzle, and the water outlet is detachably connected to a water outlet nozzle. The water inlet nozzle and the water outlet nozzle are conical in shape, and the front end of the water inlet nozzle and the water outlet nozzle are oblique or umbrella-shaped. The water inlet of the water inlet nozzle is larger than the water outlet of the water outlet nozzle.

5. The positive and negative pressure nasal irrigator as described in claim 1, characterized in that, The water pump's inlet pipe is connected to the storage tank, and the water pump's outlet pipe is connected to the water hole of the bracket. The water pump's outlet pipe and the water hole on the bracket are sealed together by an O-ring. The water pump's outlet pipe is then connected to the inlet of the nasal rinse head through the water hole on the bracket. The air pump's inlet pipe is connected to the air hole on the bracket, and the air pump's inlet pipe and the air hole on the bracket are sealed together by an O-ring. The air pump's outlet pipe is connected to the air inlet of the nasal rinse head.

6. The positive and negative pressure nasal irrigator as described in claim 1, characterized in that, The bracket is fixed to the bottom of the receiving cavity by screws.

7. The positive and negative pressure nasal irrigator as described in claim 1, characterized in that, The main unit also has a top cover, which is snapped onto the receiving cavity and isolated from the liquid storage tank above the main unit. The bottom of the receiving cavity is provided with an air vent and a water inlet. The top cover is provided with a water inlet and an air vent corresponding to the bottom of the cavity. The main unit draws water from the liquid storage tank through the water inlet of the top cover.

8. The positive and negative pressure nasal irrigator as described in claim 1, characterized in that, The main unit also includes a battery and a charging dock.

9. The positive and negative pressure nasal irrigator as described in claim 1, characterized in that, The lower part of the liquid storage tank has a sealing ring, and the lower part of the liquid storage tank is fixed to the main unit by a rotating buckle. Silicone rings are installed on the upper and lower parts of the main unit.

10. The positive and negative pressure nasal irrigator as described in claim 1, characterized in that, The waste liquid tank is provided with a drainage hole at the top, and multiple drainage holes are symmetrically arranged. The position of the drainage hole is connected to the side of the waste liquid tank by an inclined plane.

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