TWI847866B - Nasal aspirator with adjustable pressure - Google Patents

Abstract

A nasal aspirator with pressure adjustment is composed of an outer shell and a bottom shell; the outer shell is protruded at the top and bottom to form an inlet and an outlet, and the inlet and the outlet are connected to each other; the bottom shell is provided with an inner wall and is covered with a cover to define a high-pressure chamber, and then the outer shell is fixed with an outer wall to form a low-pressure chamber. The inner wall has a height difference and a negative pressure hole and a pressure equalizing hole at the opposite ends; its characteristics are: a negative pressure air is provided through the negative pressure hole, and negative pressure drainage is performed through the pressure equalizing hole. When the sucked liquid or object overflows into the high pressure chamber, the negative pressure hole is set at a position higher than the pressure equalizing hole and far away from a flow direction, and the negative pressure air moves upward into the negative pressure hole.

Description

Nasal aspirator with pressure adjustment

The present invention relates to a nasal aspirator with pressure adjustment, and in particular to a nasal aspirator with pressure adjustment, wherein the pressure equalization hole can pass a smaller mass of the liquid to be aspirated.

The suction tube assembly of the conventional nasal aspirator is as disclosed in the US Patent No. US20220288295A1, and its main structural features are: a nasal aspirator suction tube assembly, including a suction tube base 6, wherein the suction tube base 6 has a first connection end connected to the host and a second connection end connected to the suction tube cover, and the suction tube base 6 is connected to the suction tube cover to form a chamber therein, and the middle part of the suction tube base 6 is provided with an outlet pipe 8 passing through the suction tube base 6 and extending into the chamber, and the upper end of the suction tube cover is provided with a A suction tube 2 is provided, which passes through the suction tube cover and extends into the chamber. The characteristic of the invention is that a bracket 4 is provided in the chamber, and the bracket 4 includes a bracket tube 41 which can be inserted into the outlet tube 8 and a baffle 5 provided at the other free end of the bracket tube 41; at least one air hole 43 is provided on the bracket tube 41 so that the suction tube 2 and the outlet tube 8 always maintain communication; the bracket 4 also includes an integrally formed baffle I42; the cross-section of the baffle I42 is smaller than the cross-section of the baffle 5; the air hole 43 is provided between the baffle 5 and the baffle I42.

It is known that the first section and the second section of the channel that provide negative pressure flow will face problems such as preventing nasal fluid backflow and noise reduction, which has led to many patents, such as the above-mentioned problems mentioned in the patent announcements CN110478541A, CN112999063A, CN113456906A, CN115120307A, US11524105, US20220296800A1, US20220355016A1, and US20220395625A1. These problems can be solved at the same time in the present invention, which is quite practical.

The purpose of the present invention is to provide a nasal aspirator with pressure adjustment, wherein the negative pressure hole is arranged at a position higher than the pressure equalization hole and away from the flow direction, and the negative pressure air moves upward into the negative pressure hole, so that the overflowing sucked liquid or object will be stagnant at the bottom of the high pressure chamber.

The nasal aspirator with pressure adjustment that can achieve the above-mentioned purpose of the invention includes:

An outer shell, which protrudes at the top and bottom to form a suction port and a discharge port, and the suction port and the discharge port are connected to each other;

A bottom shell is provided with an inner wall extending upward from a bottom wall, and correspondingly covers a mask with a long edge to define a high-pressure chamber together, and then the outer shell is fixed with an inner peripheral cover through the outer periphery of an outer wall to form a low-pressure chamber together, and there are height differences and a negative pressure hole and a pressure-equalizing hole located at relatively far ends in the high-pressure chamber and on the inner wall respectively; its characteristics are:

The negative pressure provided by the negative pressure source can generate a negative pressure air in the negative pressure hole, and negative pressure drainage is performed through the pressure equalization hole with a reduced cross-sectional area. When the sucked liquid or object flows from the suction port to the low-pressure chamber, it is stored at the bottom of the low-pressure chamber. If it overflows to the high-pressure chamber, the negative pressure hole is set higher than the pressure equalization hole and far away from the flow direction, and the negative pressure air moves upward into the negative pressure hole.

1: Shell

11: Inlet

12: Exhaust outlet

2: Bottom shell

21: Bottom wall

22: Inner wall

221: Negative pressure hole

222: Pressure equalization hole

223: Gap

224: First guide surface

225: Second guide surface

226: Second negative pressure hole

23: Cavity wall

231: Bump

24: High pressure chamber

25: Outer wall

26: Low pressure chamber

3: Mask

31: Long edge

4: Nozzle

5: Flow direction

Figure 1 is a dissected view of the pressure-adjustable nasal aspirator of the present invention;

Figure 2 is a three-dimensional schematic diagram of the top of the bottom shell;

Figure 3 is a three-dimensional schematic diagram of the bottom of the pressure-adjustable nasal aspirator of the present invention;

Figure 4 is a top view of the first embodiment of the bottom shell;

Figure 5 is a partial enlarged schematic diagram of part A of Figure 4;

Figure 6 is a top view of the second embodiment of the bottom shell;

Figure 7 is a partial enlarged schematic diagram of part B of Figure 6;

Figure 8 is a cross-sectional view of the nasal aspirator in the X-X direction with reference to Figure 2; and

Figure 9 is a cross-sectional view of the nasal aspirator in the Y-Y direction with reference to Figure 2.

Please refer to Figures 1 and 2. The pressure-adjustable nasal aspirator provided by the present invention mainly comprises: an outer cover 1 and a bottom cover 2;

The housing 1 is formed with a suction port 11 and a discharge port 12 protruding from the top and bottom, and the suction port 11 and the discharge port 12 are interconnected; in actual use, the upper part of the suction port 11 has a clamping structure, which is covered with a suction nozzle 4 made of silicone material;

The bottom shell 2 is provided with an inner wall 22 extending upward from a bottom wall 21, and correspondingly covers a mask 3 having a long edge 31 to define a high pressure chamber 24 (high pressure chamber), and then provides the outer shell 1 with an inner peripheral cover fixed through the outer periphery of an outer wall 25, and together forms a low pressure chamber 26 (low pressure chamber), and a negative pressure hole 221 and an equalizing pressure hole 222 with a height difference are provided in the high pressure chamber 24 and on the inner wall 22, respectively, as shown in Figures 8 and 9; its characteristics are:

The negative pressure provided by the negative pressure source can generate negative pressure air in the negative pressure hole 221. The negative pressure air can be drained by the negative pressure equalization hole 222 with a reduced cross-sectional area. When the sucked liquid or object flows from the suction port 11 with lower negative pressure to the low-pressure chamber 26 with higher negative pressure, it will pass through the long edge 31 to cover the top of the equalizing hole 222 and be stored in the bottom space of the low-pressure chamber 26. If the sucked liquid or object overflows to the high-pressure chamber 24, it will flow in along a flow direction 5. Because the negative pressure hole 221 is set higher than the equalizing hole 222 and away from the flow direction 5, the negative pressure air moves upward into the negative pressure hole 221, so that the overflowing sucked liquid or object will stay in the bottom of the high-pressure chamber 24, and will not overflow back to the negative pressure hole 221.

To further explain, the bottom shell 2 is extended upward from the bottom wall 21, and is provided with the inner wall 22 and the outer wall 25 to form an annular space therebetween. The negative pressure hole 221 is formed on at least a portion of the inner wall 22, and the upper edge of the inner wall 22 is provided with a notch 223 that forms a height difference with and is far away from the negative pressure hole 221;

When the mask 3 is positioned at the top of the inner wall 22, the notch 223 is reduced to the pressure equalizing hole 222, and the pressure equalizing hole 222 is shielded by the long edge 31 above the pressure equalizing hole 222, and the outer diameter of the long edge 31 of the mask 3 is larger than the outer diameter of the inner wall 22;

Therefore, a second negative pressure hole 226 is provided at the position where the bottom wall 21 of the bottom shell 2 extends downward, and the second negative pressure hole 226 can be connected to the negative pressure source. The negative pressure provided by the negative pressure source can generate the negative pressure air in the negative pressure hole 221, and negative pressure drainage is performed through the pressure equalization hole 222 with a reduced cross-sectional area.

As shown in FIG3 , a chamber wall 23 extends below the bottom wall 21. The chamber wall 23 has a plurality of bumps 231 with a fool-proof design. The bumps 231 are arranged on the outer surface of the chamber wall 23 in an asymmetrical manner or at a specific angle so that the bumps 231 can be relatively locked with the locking mechanism of the negative pressure source (not shown in the figure). When the nasal aspirator is used at an angle, the fool-proof design ensures that the negative pressure hole 221 is formed in the head room of the high pressure chamber 24 to achieve smooth operation.

When the attracted liquid or object is attracted, the flow direction 5 of the negative pressure air passing through the pressure equalizing hole 222 will be different from the flow direction 5 of the negative pressure air passing through the discharge port 12, so that the attracted liquid or object will produce different working conditions. For example, the attracted liquid or object stays in the low pressure chamber 26, and the pressure equalizing hole 222 can only pass the attracted liquid with a smaller mass, but cannot pass the attracted object with a larger mass.

In addition, the attracted liquid or object flows to the bottom space of the high-pressure chamber 24 at the same time, and restricts the attracted liquid from the pressure equalizing hole 222, thereby forming a jet fluid. This is caused by the repeated changes of the short-term pressure drop in the high-pressure chamber 24 caused by the attracted liquid flowing to the bottom space, and the short-term pressure recovery caused by the inflow of the attracted liquid from the pressure equalizing hole 222, which will produce the strength rhythm of the attracted liquid inflow, thereby generating a pulsating flow (pulsating flow) or intermittent flow (intermittent flow) of the attracted liquid generated by the pressure equalizing hole 222.

Further, please refer to Figures 4 and 5. The notch 223 has a first guide face 224 (first guide face) for allowing the negative pressure air to move along the first direction and a second guide face 225 (second guide face) for moving along the second direction. In addition, the first guide face 224 and the second guide face 225 are respectively disposed on different sides of the notch 223 of the inner wall 22. The lower half of the mask 3 covers a portion of the upper half of the notch 223 to form the negative pressure hole 221. At the same time, the design of the mask 3 takes into account the height dimension of the negative pressure hole 221. The mask 3 can define the opening area of the negative pressure hole 221 according to the length dimension of the notch 223 covered.

The pressure equalizing hole 222 of the present invention is designed to be a flat structure with a flat portion in the width direction (long side). This provides that when the attracted liquid in the low-pressure chamber 26 passes through the pressure equalizing hole 222, the fluid streamline is no longer parallel, but forms a tapered boundary, so that the attracted liquid flows along the flat width direction of the pressure equalizing hole 222 to the high-pressure chamber 24.

Specifically, when a large amount of attracted liquid in the low-pressure chamber 26 is attracted and gathered around the pressure-equalizing hole 222, the first guide surface 224 and the second guide surface 225 together form a convergence angle, as shown in Figures 6 and 7. The function of this angle is to adjust the flow direction 5 of the attracted liquid in the pressure-equalizing hole 222, so that it presents a convergent flow and flows toward the high-pressure chamber 24;

In this way, the flow rate flowing to the center of the pressure-equalizing hole 222 can be increased, while the flow rate flowing to the negative pressure hole 221 can be reduced, so as to guide and distribute the attracted liquid. By tilting the first guide surface 224 and the second guide surface 225, the flow rate of the attracted liquid in the pressure-equalizing hole 222 can be kept stable, thereby achieving flow stability.

In summary, this case is not only innovative in terms of spatial form, but also can enhance the above-mentioned functions compared to conventional items. It should have fully met the statutory invention patent requirements of novelty and progress. Therefore, I have filed an application in accordance with the law and sincerely request your approval of this invention patent application to encourage inventions. I am grateful for your kindness.

1: Shell

11: Inlet

12: Exhaust outlet

2: Bottom shell

21: Bottom wall

22: Inner wall

221: Negative pressure hole

222: Pressure equalization hole

226: Second negative pressure hole

23: Cavity wall

231: Bump

24: High pressure chamber

25: Outer wall

26: Low pressure chamber

3: Mask

31: Long edge

4: Nozzle

Claims (4)

A nasal aspirator with pressure adjustment comprises: an outer shell, which is protruded at the top and bottom to form an inlet and an outlet, and the inlet and the outlet are connected to each other; a bottom shell, which is extended upward from a bottom wall to form an inner wall, and is correspondingly covered with a mask with a long edge to define a high-pressure chamber, and then the outer shell is fixed to the inner peripheral cover through the outer periphery of an outer wall to form a low-pressure chamber, and the high-pressure chamber has a height difference and a position difference. A negative pressure hole and a pressure equalizing hole at the relatively far end; its characteristics are: through the negative pressure provided by the negative pressure source, a negative pressure air can be generated in the negative pressure hole, and negative pressure drainage is performed through the pressure equalizing hole with a reduced cross-sectional area. When the sucked liquid flows from the suction port to the low-pressure chamber, it is stored at the bottom of the low-pressure chamber. If it overflows to the high-pressure chamber, the negative pressure hole is set at a position higher than the pressure equalizing hole and far away from a flow direction, and the negative pressure air moves upward into the negative pressure hole. As described in item 1 of the patent application scope, the nasal aspirator with pressure adjustment, wherein the mask is positioned at the top of the inner wall, a notch is reduced to form the pressure equalization hole, and the pressure equalization hole has a flat shape in the width direction. As described in item 2 of the patent application scope, the nasal aspirator with pressure adjustment, wherein the notch has a first guide surface for allowing the negative pressure air to move along a first direction and a second guide surface for moving along a second direction, and the first guide surface and the second guide surface are respectively disposed on different sides of the notch opposite to each other. As described in item 3 of the patent application, the nasal aspirator with pressure adjustment, wherein the first guide surface and the second guide surface together form a convergence angle to adjust the flow direction of the sucked liquid in the pressure equalization hole to present a convergent flow toward the high-pressure chamber.

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