A water-air separator and dental negative pressure generating system

Abstract

The utility model discloses a water gas separator and dental negative pressure generating system belong to dental medical instrument technical field, the water gas separator includes shell and air outlet cylinder, and the shell bottom is equipped with the liquid discharge port, and the lateral wall is equipped with the air inlet, and the air inlet axis is close to the tangent direction of shell lateral wall, and the air outlet cylinder is from the shell top and is lower than the air inlet in the lower extreme. It still includes valve body, collection block, blocking piece, liquid level detection subassembly and anti -vortex cover etc. component. The gas is rotated in the shell through tangential air inlet, and the liquid is separated through centrifugal force, and blocking piece and anti -vortex cover can avoid that liquid is taken into air outlet cylinder by airflow, and liquid level detection subassembly can monitor liquid level and failure. The system includes first water gas separation component, above-mentioned separator and negative pressure machine, can high -efficient separation water and gas, reduces liquid and enters negative pressure machine, prolongs the life of equipment, is applicable to dental treatment scene.

Description

Technical Field

[0001] This utility model relates to the field of dental medical device technology, and more specifically, to a water-air separator and a dental negative pressure generating system. Background Technology

[0002] In dental treatment, negative pressure systems use negative pressure to absorb saliva and water sprayed from instruments in the oral cavity. However, the entry of liquid-containing gas into the negative pressure system can corrode internal components and shorten its lifespan. In existing technology, although a primary water-air separation component is installed at the front end of the negative pressure system, some liquid still enters the system with the gas after separation, leading to moisture-induced malfunctions.

[0003] Existing solutions have significant drawbacks: first, water-gas separation is incomplete, failing to further reduce the amount of liquid residue in the gas; second, the separated liquid is easily carried back by the airflow, making it difficult to prevent liquid from entering the negative pressure unit. Therefore, there is an urgent need for a structure that can achieve deep water-gas separation and prevent secondary liquid entrainment to solve these problems. Summary of the Invention

[0004] This invention provides a water-air separator to solve the problems in the prior art where water-air separation at the front end of the negative pressure machine is incomplete, and liquid is still mixed in with the gas after the first separation and enters the negative pressure machine, causing equipment corrosion. It also addresses the technical problems that the separated liquid is easily carried back by the airflow, making it impossible to effectively prevent the liquid from entering the negative pressure machine with the airflow. Furthermore, it lacks versatility and is difficult to adapt to the high-efficiency water-air separation requirements in dental treatment scenarios.

[0005] This utility model provides a water-air separator, including a housing and an air outlet; the bottom of the housing has a drain port, and the side wall of the housing has an air inlet, the axial direction of the air inlet being close to the tangential direction of the side wall of the housing, so that the gas enters the housing along the direction close to the inner wall of the housing and rotates along the housing wall; the air outlet extends into the housing from the top of the housing, and the lower end of the air outlet is lower than the air inlet.

[0006] Furthermore, a valve body is installed at the bottom of the drain port, and the valve body is used to control the opening and closing of the drain port.

[0007] Furthermore, a collecting block is provided on the drain port, the top of the collecting block having a structure that is high on the outside and low in the middle; the bottom of the outer shell forms an inwardly contracting section at the transition point to the drain port, the contracting section is located above the drain port, and the bottom of the collecting block is correspondingly connected to the contracting section; the valve body is installed on the collecting block.

[0008] Furthermore, a blocking element is installed inside the housing, and the blocking element is located at the bottom of the housing; the blocking element is provided with an outwardly protruding edge.

[0009] Furthermore, the blocking component also includes a support frame, which has a tubular structure and multiple through holes on its side wall; the bottom of the outer shell forms an inwardly contracting section at the transition to the drain port, the contracting section is located above the drain port, and the through holes are positioned below the lower edge of the contracting section, so that the liquid on the inner wall of the outer shell can flow into the drain port through the through holes after being collected by the contracting section.

[0010] Furthermore, a liquid level detection assembly is installed inside the housing. The liquid level detection assembly includes a detection probe and a fixing ring. The detection probe is mounted on the fixing ring, and the fixing ring is fixed to the housing, with the detection probe facing downwards.

[0011] Furthermore, the detection probe is an adjustable structure, including a probe body and a telescopic adjustment part. The telescopic adjustment part is connected to a fixing ring and is used to change the vertical detection height of the detection probe to adapt to the detection requirements of different liquid level thresholds.

[0012] Furthermore, the inner wall of the outer casing is provided with spiral guide ribs, which extend along the axial direction of the outer casing and are adapted to the tangential direction of the air inlet, in order to enhance the centrifugal effect of the gas rotation within the outer casing.

[0013] Furthermore, the lower end of the air outlet is provided with an anti-vortex cover, which is a mesh structure and protrudes outward in an arc shape to prevent the gas from forming a local vortex at the inlet of the air outlet and thus stirring up the liquid.

[0014] This utility model also provides a dental negative pressure generating system, including a primary water-air separation component, the aforementioned water-air separator, and a negative pressure generator; the primary water-air separation component, the water-air separator, and the negative pressure generator are connected in sequence.

[0015] The water-gas separator provided by this utility model has the following advantages: the gas rotates along the shell wall by the tangential air inlet near the side wall of the shell, and water-gas separation is achieved by combining centrifugal force; the lower end of the air outlet is lower than the air inlet, leaving room for the gas to rotate and separate, and preventing insufficiently separated gas from directly entering the air outlet; the spiral guide ribs on the inner wall of the shell extend axially and are adapted to the tangential direction of the air inlet, further enhancing the gas rotation centrifugal effect and improving the liquid separation efficiency; the anti-vortex cover at the lower end of the air outlet is a mesh arc structure, which can prevent the gas from forming vortices at the air outlet and swirling up the liquid. The multiple structures work together to achieve efficient water-gas separation, eliminating the need for additional separation equipment and reducing system complexity.

[0016] Furthermore, the adjustable detection probe of the liquid level detection component can adapt to different liquid level thresholds, taking into account both normal drainage monitoring and fault warning; the connection between the collecting block and the closing section guides the liquid flow to the drain port, and the valve body controls the drainage as needed to avoid liquid accumulation; the through hole of the support frame of the blocking component, in conjunction with the closing section structure, ensures smooth liquid discharge; all components are fixed by conventional connection methods, making disassembly and assembly convenient, and the whole system is compatible with dental negative pressure generation systems, reducing the amount of liquid entering the negative pressure machine, extending equipment life, and taking into account separation efficiency and operational stability.

[0017] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.

[0019] Figure 1 This is a cross-sectional view of a water-air separator;

[0020] Figure 2 A three-dimensional view of a water-air separator;

[0021] Figure 3 This is an exploded view of a water-gas separator;

[0022] Figure 4 This is a top view of a water-air separator;

[0023] Figure 5 This is a cross-sectional view of yet another embodiment of the water-air separator;

[0024] Figure 6 This is a schematic diagram showing the connection between the air outlet and the anti-vortex shield.

[0025] Figure label:

[0026] Water-air separator 100;

[0027] 1. Outer shell; 2. Air outlet; 3. Valve body; 4. Collector block; 5. Blocking component; 6. Liquid level detection assembly; 7. Anti-vortex cover;

[0028] 11. Drain port; 12. Air inlet; 13. Closure section; 14. Outer shell section 1; 15. Outer shell section 2; 16. Outer shell section 3; 17. Outer shell section 4; 18. Spiral guide rib; 51. Support frame; 511. Through hole; 61. Detection probe; 611. Probe body; 612. Telescopic adjustment part; 62. Fixing ring. Detailed Implementation

[0029] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0030] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0031] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0032] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0034] In the specification and claims of this utility model, the terms "first" and "second" may explicitly or implicitly include one or more of those features. In the description of this utility model, unless otherwise stated, "multiple" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0035] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and other terms indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] The water-air separator according to an embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[0038] The water-air separator disclosed in this embodiment of the utility model includes a housing 1 and an air outlet 2. A drain port 11 is provided at the bottom of the housing 1, and an air inlet 12 is provided on the side wall of the housing 1. The axial direction of the air inlet 12 is consistent with the tangential direction of the side wall of the housing 1, so that the gas enters the housing 1 along the tangential direction of the inner wall of the housing 1 and rotates along the housing wall. The air outlet 2 enters the housing 1 from the top, and the lower end of the air outlet 2 is lower than the air inlet 12.

[0039] In other words, this embodiment discloses a water-air separator, including a housing 1 and an air outlet 2.

[0040] like Figure 1 , Figure 2 As shown, the outer shell 1 is a hollow cylindrical structure, with an internal cavity for water-gas separation. A drain port 11 is located at the bottom of the outer shell 1, communicating with the internal cavity to discharge the separated liquid. An air inlet 12 is located on the side wall of the outer shell 1, allowing the gas from the initial water-gas separation to enter the interior of the outer shell 1. Figure 4 As shown, the axial direction of the air inlet 12 is close to the tangential direction of the side wall of the outer casing 1. This offset structure allows the gas entering the outer casing 1 to flow along the direction close to the inner wall of the outer casing 1 and rotate along the shell wall under the action of the flow velocity. Centrifugal force is used to throw the liquid entrained in the gas toward the inner wall of the outer casing 1, achieving preliminary water-gas separation. Preferably, the inner wall of the air inlet 12 can be set to be tangential to the inner wall of the outer casing 1, so that when the gas enters the outer casing 1, it can flow tangentially along the inner wall of the outer casing 1 and rotate along the shell wall under the action of the flow velocity. Centrifugal force is used to throw the liquid entrained in the gas toward the inner wall of the outer casing 1, achieving better preliminary water-gas separation.

[0041] like Figure 1As shown, the air outlet 2 is a tubular structure. One end of it, away from the outer casing 1, is used to connect to the negative pressure unit (not shown), while the other end extends from the top of the outer casing 1 into the casing 1. The lower end of the air outlet 2 extending into the casing 1 is lower than the air inlet 12. This structural design ensures that after the gas enters from the air inlet 12, it must first rotate along the inner wall of the outer casing 1 for a certain distance to complete centrifugal separation before flowing upward to the inlet of the air outlet 2. This prevents insufficiently separated gas from directly entering the air outlet 2, extends the water-gas separation path, and improves the separation effect.

[0042] In this embodiment, as Figure 3 As shown, the outer shell 1 can adopt a four-section structure: outer shell section 14, outer shell section 2 15, outer shell section 3 16, and outer shell section 4 17. The four-section structure is fixed by welding or threaded connection, which is convenient for processing and assembly; the gas outlet 2 is sealed to the top of the outer shell 1 by a sealing ring (not shown) to prevent gas from leaking from the connection and ensure the stability of the negative pressure environment inside the outer shell 1.

[0043] In some specific embodiments, a valve body 3 is installed at the bottom of the drain port 11. The valve body 3 is used to control the opening and closing of the drain port 11. The valve body 3 can be a solenoid valve or a manual valve. In this embodiment, a solenoid valve is preferred. It is connected to an external control unit (not shown) through a pipeline and can automatically open according to the liquid level detection signal or a preset time to discharge the liquid separated from the housing 1 from the drain port 11.

[0044] The outer casing 1 adopts a four-section structure consisting of outer casing section 14, outer casing section 15, outer casing section 16, and outer casing section 17, which are fixed by threaded connections for easy assembly. The air inlet 12 is located on the side wall of outer casing section 15 and is sealed to an external air source pipeline (not shown) to ensure that gas enters only through the air inlet 12. The air outlet 2 is sealed to the top of outer casing section 14 by a sealing ring to prevent gas leakage from affecting the negative pressure environment. After the gas enters tangentially through the air inlet 12, it rotates along the casing wall. The liquid is thrown to the inner wall by centrifugal force and flows to the bottom. When the liquid accumulates to a certain amount, the valve body 3 opens, and the liquid is discharged through the drain port 11, realizing the orderly discharge of the liquid.

[0045] In some specific embodiments, a collecting block 4 is provided on the drain port 11. The top of the collecting block 4 has an inclined structure with a high outer side and a low middle side. The bottom of the outer shell 1 forms an inwardly contracting section 13 at the transition point to the drain port 11. The contracting section 13 is located above the drain port 11, and the bottom of the collecting block 4 is connected to the contracting section 13. The valve body 3 is installed on the collecting block 4.

[0046] Specifically, such as Figure 5As shown, when the bottom of the four sections 17 of the outer casing transitions towards the drain port 11, the inner wall gradually contracts inward to form a constriction section 13. The inclination angle of the constriction section 13 is adapted to the inclined structure of the top of the collecting block 4, so that the liquid on the inner wall of the outer casing 1 is guided by the constriction section 13 and converges along the inclined surface of the top of the collecting block 4 to the drain port 11. The valve body 3 is fixed to the bottom of the collecting block 4 by threads and can be opened or closed according to actual needs to avoid excessive accumulation of liquid in the outer casing 1.

[0047] After the gas enters the outer shell 1 tangentially through the air inlet 12, it rotates along the shell wall and is separated from the liquid by centrifugal force. The liquid flows downward along the inner wall of the outer shell 1 and is guided by the converging section 13 and the collecting block 4 to converge to the drain port 11. Finally, the liquid is discharged through the valve body 3, which effectively improves the smoothness of liquid collection and discharge.

[0048] In some specific embodiments, a blocking member 5 is installed inside the housing 1, and the blocking member 5 is located at the bottom of the housing 1; the blocking member 5 is provided with an outwardly protruding edge. Specifically, as... Figure 5 As shown, the blocking component 5 is fixed to the inner wall of the lower section of the outer casing 1 by a snap or bolt, and its entire structure is located above the drain port 11 and below the lower end of the air outlet 2. The outwardly protruding edge is an annular structure, and the outer diameter of the edge is slightly smaller than the inner diameter of the lower section of the outer casing 1. A gap is left between the edge and the inner wall of the outer casing 1 to allow liquid to flow through. The gap width can be set to 5-10mm, which neither affects the flow of liquid to the drain port 11 nor obstructs the upward airflow.

[0049] After the gas enters the outer casing 1 tangentially through the inlet 12, it rotates along the inner wall, generating centrifugal force. The liquid is thrown to the inner wall of the outer casing 1 and flows downward along the wall, then is guided to the drain outlet 11 through the converging section 13 and the collecting block 4. When the gas flows upward to the outlet 2 under negative pressure, it must first pass through the edge of the blocking member 5. The edge can disrupt the upward path of the airflow, preventing the airflow from directly impacting the accumulated liquid at the bottom of the outer casing 1, and preventing the liquid from being rolled up by the airflow and carried into the outlet 2, further improving the water-gas separation effect. At the same time, the valve body 3 can control the opening of the drain outlet 11 according to the liquid accumulation, ensuring that the liquid is discharged in a timely manner without stagnation.

[0050] The lower end of the air outlet 2 extends into the interior of the three sections 16 of the outer shell and is lower than the air inlet 12, leaving sufficient space for gas rotation and separation. Together with the blocking effect of the blocking component 5, it further reduces the amount of liquid entrained in the gas.

[0051] In some specific embodiments, the blocking member 5 also includes a support frame 51, which has a tubular structure and multiple through holes 511 on its side wall; a constricted section 13 is formed at the transition from the bottom of the outer shell 1 to the drain port 11, the constricted section 13 is located above the drain port 11, and the position of the through holes 511 is lower than the lower edge of the constricted section 13, so that the liquid on the inner wall of the outer shell 1 can flow into the drain port 11 through the through holes 511 after being collected by the constricted section 13.

[0052] In terms of specific structure, such as Figure 1 and Figure 3 As shown, the support frame 51 is a hollow tube, with its upper end connected to the edge of the blocking member 5, which can be integrally formed or welded. Its lower end extends above the collecting block 4. Four to six through holes 511 are evenly distributed on the lower side wall of the support frame 51, with the hole diameter adapted to the liquid flow requirements. Because the through holes 511 are located below the lower edge of the constriction section 13, the liquid on the inner wall of the outer shell 1, after being guided by the constriction section 13, will first flow to the outside of the support frame 51, then enter the interior of the support frame 51 through the through holes 511, and finally flow into the drain port 11. This design utilizes the tubular support frame 51 to provide structural support for the blocking member 5, ensuring the stability of the edge of the blocking member 5, while also providing a smooth flow path for the liquid through the through holes 511, preventing liquid from stagnating below the blocking member 5.

[0053] In some specific embodiments, a liquid level detection component 6 is installed inside the housing 1. The liquid level detection component 6 includes a detection probe 61 and a fixing ring 62. The detection probe 61 is mounted on the fixing ring 62, the fixing ring 62 is fixed on the housing 1, and the detection probe 61 is set downward.

[0054] Specifically, such as Figure 3 As shown, the fixing ring 62 is an annular structure, fixed to the inner wall of the junction between the second section 15 and the first section 14 of the outer shell 1 by bolts or clamps. Its inner diameter matches the inner wall of the outer shell 1 to ensure a stable installation. The detection probe 61 is a columnar structure, with its upper end connected to the fixing ring 62 by threads or clips, and its lower end extending vertically downwards. The distance between the probe tip and the bottom of the outer shell 1 is adapted to the liquid level detection requirements. It is usually set to be 2-5 cm from the top of the collecting block 4 to detect whether there is excess liquid that has not been discharged in time.

[0055] The working logic of the liquid level detection component 6 is as follows: When the liquid inside the housing 1 accumulates to the contact detection probe 61, the probe feeds back an electrical signal to the external control unit (not shown). The control unit can trigger the valve body 3 to open and drain the liquid. If the liquid level rises abnormally (e.g., a large amount of liquid rushes in due to a failure of the initial separation component), the control unit will issue a fault alarm after the detection probe 61 detects the abnormality and trigger the separator to stop working (e.g., cutting off the air circuit between the negative pressure unit and the separator or pausing the power output of the negative pressure unit) to prevent excessive liquid from entering the negative pressure unit. The installation position of the fixing ring 62 avoids the airflow path of the air inlet 12 and the air outlet 2 to prevent airflow from interfering with the detection accuracy. The detection probe 61 is made of corrosion-resistant stainless steel, which is suitable for the liquid environment in dental settings.

[0056] In some specific embodiments, the detection probe 61 has an adjustable structure, including a probe body 611 and a telescopic adjustment part 612. The telescopic adjustment part 612 is connected to the fixing ring 62 and is used to change the vertical detection height of the detection probe 61 to adapt to the detection requirements of different liquid level thresholds.

[0057] Specifically, such as Figure 3 As shown, the telescopic adjustment part 612 can adopt a threaded sleeve structure. Its upper end is fixed to the fixing ring 62 by bolts, and the lower end has an internal thread on its inner wall. The upper end of the probe body 611 has an external thread, and the two are connected by thread engagement. By rotating the probe body 611, the length of its lower end extending out of the telescopic adjustment part 612 can be adjusted, thereby changing the detection height. The adjustment range can be set to 3-8cm. After adjustment, the position can be fixed by tightening the lock nut (not shown).

[0058] The advantage of this adjustable structure is that it allows for flexible setting of the liquid level threshold to accommodate differences in saliva secretion and instrument water spray volume among different patients during dental treatment. For example, the probe height can be adjusted to a higher position during routine treatment (reducing the frequency of fluid drainage), while a lower position can be adjusted for scenarios with less fluid, such as pediatric treatment (avoiding fluid accumulation). If the performance of the water-air separation component fluctuates initially, the probe height can also be adjusted to adapt to changes in the amount of fluid entering. Both the probe body 611 and the telescopic adjustment part 612 are made of corrosion-resistant plastic to avoid chemical reactions with the liquid and ensure detection stability.

[0059] After the gas enters through the air inlet 12, it undergoes centrifugal separation. The liquid flows through the through hole 511 and the collecting block 4 to the drain port 11. The blocking component 5 prevents the liquid from being carried away by the airflow. The liquid level detection component 6 monitors the liquid level in real time through an adjustable probe, and works with the valve body 3 to achieve precise liquid discharge. The overall structure takes into account both separation efficiency and scenario adaptability.

[0060] In some specific embodiments, the inner wall of the outer casing 1 is provided with a spiral guide rib 18, which extends along the axial direction of the outer casing 1 and is adapted to the tangential direction of the air inlet 12 to enhance the centrifugal effect of the gas rotation within the outer casing 1.

[0061] Specifically, such as Figure 5 As shown, the spiral guide rib 18 is a long, raised structure integrally formed on the inner wall of the three sections 16 of the outer shell 1, and its spiral direction is consistent with the tangential direction of the air inlet 12. When the air inlet 12 is arranged along a clockwise tangential line, the guide rib 18 extends clockwise in a spiral. The pitch is set to 1.5-2 times the diameter of the outer shell 1, and the height is 3-5 mm, which neither excessively obstructs the airflow nor fails to guide the gas to flow along the spiral path.

[0062] The function of the spiral guide ribs 18 is as follows: after the gas enters tangentially from the inlet 12, the gas rotates faster and the swirling stability is stronger under the "guiding" effect of the guide ribs 18. Compared with a structure without guide ribs, the centrifugal force of the rotating gas can be increased by 20%-30%, which can more thoroughly throw the liquid onto the inner wall of the outer shell 1. At the same time, the protruding structure of the guide ribs 18 can "intercept" the liquid flowing along the wall, slow down the liquid's falling speed, and prevent the liquid from being re-entrained by the rising airflow, further improving the separation effect.

[0063] After the gas is guided and rotated by the guide rib 18, the liquid flows along the wall through the constriction section 13 to the drain port 11. The blocking component 5 prevents the liquid from being rolled up by the airflow. The liquid level detection component 6 monitors the liquid level and cooperates with the valve body 3 to drain the liquid. The adjustable probe adapts to different scenario requirements. The overall structure enhances the core separation performance through the spiral guide rib 18, adapting to the front-end separation requirements of dental negative pressure machines.

[0064] In some specific embodiments, the lower end port of the air outlet 2 is provided with an anti-vortex cover 7. The anti-vortex cover 7 has a mesh structure and protrudes outward in an arc shape to prevent the gas from forming a local vortex at the inlet of the air outlet 2 and thus stirring up the liquid.

[0065] Specifically, such as Figure 6 As shown, the anti-vortex shroud 7's mesh structure consists of multiple interlaced fine metal wires or corrosion-resistant plastic wires, fixed to the lower end of the exhaust cylinder 2 by clips or welding. Its arc-shaped protrusion height is 1 / 3 to 1 / 2 of the diameter of the exhaust cylinder 2, and the mesh structure has a pore size of 0.5-2 mm. This allows gas molecules to pass freely while effectively preventing larger liquid particles from passing directly through. Simultaneously, the mesh structure increases the contact area between the gas and the shroud, allowing for a more uniform gas distribution during passage and preventing excessively high local airflow speeds that could induce vortices.

[0066] The mechanism of the anti-vortex cover 7 is as follows: When the gas flows upward to the inlet of the exhaust cylinder 2 after rotational separation, if it directly enters the exhaust cylinder 2, it is easy to form local vortices due to changes in flow velocity. These vortices can easily pick up nearby residual fine droplets. The arc-shaped raised mesh structure can disperse the airflow, allowing the gas to smoothly enter the exhaust cylinder 2 along the surface of the cover, thus avoiding the generation of vortices. At the same time, the mesh structure can directly intercept the tiny droplets carried by the airflow. Under the action of gravity, the droplets slide down the cover back to the bottom of the outer shell 1, further reducing the amount of liquid entering the exhaust cylinder 2.

[0067] After the gas enters tangentially through the inlet 12, the centrifugal effect is enhanced by the spiral guide rib 18. The liquid is thrown to the inner wall of the outer shell 1 and flows through the constriction section 13 and the through hole 511 to the drain port 11. The edge of the baffle 5 prevents the liquid from being entrained by the airflow, and the anti-vortex cover 7 prevents the formation of vortices at the inlet of the outlet cylinder 2 that would cause droplets to be rolled up. The adjustable probe of the liquid level detection component 6 monitors the liquid level and works with the valve body 3 to achieve precise liquid discharge. The overall structure optimizes the separation effect of the gas outlet through the anti-vortex cover 7, which is suitable for the dryness requirements of the dental negative pressure machine.

[0068] like Figures 1 to 6 As shown, this embodiment also discloses a dental negative pressure generation system, including a primary water-air separation component (not shown), a water-air separator 100, and a negative pressure generator (not shown); the primary water-air separation component, the water-air separator 100, and the negative pressure generator are connected in sequence. The primary water-air separation component is used for preliminary separation of the water-air mixture adsorbed in the oral cavity. The primary water-air separation component in this system adopts a conventional structure known in the art, and its function is to perform primary separation of the water-air mixture generated during dental treatment. This component can be a gravity settling type, baffle interception type, or primary centrifugal separation device commonly used in the art. Its main function is to retain most of the free liquid (such as saliva and rinsing fluid) in the mixture through physical separation and discharge it through its own drainage mechanism. The gas after preliminary separation (which may still contain a small amount of fine droplets) is then transported through pipelines to the water-air separator 100 of this invention for secondary deep separation. The water-air separator 100 is used for secondary deep separation of the gas after the primary separation. The negative pressure generator is used to provide negative pressure power. The three are connected in a sealed pipeline to form a complete air circulation.

[0069] The control unit (not shown) connected to the solenoid valve (valve body 3) mentioned above can be included in the dental negative pressure generating system, forming a linkage control with the negative pressure generator, liquid level detection component 6, etc. in the system. When the detection probe 61 of the liquid level detection component 6 triggers the liquid level signal, the control unit receives the signal and drives the valve body 3 to move. At the same time, it can control the start and stop of the negative pressure generator according to the system operating status (such as abnormal liquid level), realizing the coordinated operation of the water-air separator 100 and the entire negative pressure system.

[0070] The specific connection relationship of the dental negative pressure generating system is as follows: the air outlet of the first water-air separation component is connected to the air inlet 12 of the water-air separator 100 through a pipeline, and the air outlet 2 of the water-air separator 100 is connected to the air inlet of the negative pressure machine through a pipeline; the liquid separated by the first water-air separation component is discharged through its own drainage structure, and the liquid separated by the water-air separator 100 is discharged through the drainage port 11 and the valve body 3.

[0071] The system workflow is as follows: During dental treatment, the negative pressure machine is started to generate negative pressure. The water-air mixture formed by the saliva in the patient's mouth, the water sprayed from the instrument, and the gas is first drawn into the first water-air separation component. This component separates most of the liquid through gravity sedimentation or primary centrifugation. The remaining small amount of gas entrained with liquid enters the water-air separator 100 through the pipeline.

[0072] The gas entering the water-gas separator 100 enters the outer shell 1 along the tangential direction of the air inlet 12. Under the guidance of the spiral guide rib 18, it rotates along the shell wall and throws the residual liquid to the inner wall of the outer shell 1 by centrifugal force. The liquid flows down along the inner wall, and after being collected by the converging section 13, it flows to the drain port 11 through the through hole 511 of the blocking member 5. The collecting block 4 guides the liquid to be concentrated at the drain port 11. The valve body 3 controls the discharge according to the signal of the liquid level detection component 6 (adjustable detection probe 61) to avoid liquid accumulation.

[0073] The separated gas flows upward under negative pressure. The edge of the blocking component 5 prevents the airflow from stirring up the bottom liquid. The anti-vortex cover 7 at the lower end of the outlet cylinder 2 prevents the formation of vortices that carry liquid droplets when the gas enters. Finally, the dried gas enters the negative pressure machine through the outlet cylinder 2.

[0074] This system significantly reduces the liquid content of the gas entering the vacuum pump through a two-stage separation structure: primary separation and secondary deep separation. The primary separation component handles a large amount of liquid, while the water-air separator 100, through the synergistic action of tangential air intake, spiral guide, blocking components, and anti-vortex shroud, solves the problem of separating residual liquid after the primary separation. Simultaneously, the liquid level detection component can monitor abnormal liquid levels and issue warnings, adapting to scenarios with fluctuating liquid volumes in dental treatment and extending the service life of the vacuum pump.

[0075] The components in the system are connected by conventional pipelines, making disassembly and assembly convenient. The initial combination of the water-air separation component and the water-air separator 100 can be flexibly adjusted in installation position according to dental treatment needs, adapting to different treatment environments.

[0076] Of course, other structures and working principles of the water-air separator are understandable and achievable by those skilled in the art, and will not be described in detail in this utility model.

[0077] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A water-air separator, characterized in that, It includes an outer shell (1) and an air outlet (2); the bottom of the outer shell (1) is provided with a drain port (11), and the side wall of the outer shell (1) is provided with an air inlet (12). The axis of the air inlet (12) is close to the tangent of the side wall of the outer shell (1) so that the gas enters the outer shell (1) along the direction close to the inner wall of the outer shell (1) and rotates along the shell wall. The air outlet (2) passes through the outer shell (1) from the top of the outer shell (1), and the lower end of the air outlet (2) is lower than the air inlet (12).

2. The water-air separator according to claim 1, characterized in that, A valve body (3) is installed at the bottom of the drain port (11), and the valve body (3) is used to control the opening and closing of the drain port (11).

3. The water-air separator according to claim 2, characterized in that, A collecting block (4) is provided on the drain port (11). The top of the collecting block (4) is high on the outside and low in the middle. The bottom of the outer shell (1) forms an inwardly contracting section (13) at the transition point to the drain port (11). The contracting section (13) is located above the drain port (11), and the bottom of the collecting block (4) is connected to the contracting section (13). The valve body (3) is installed on the collecting block (4).

4. The water-air separator according to claim 1, characterized in that, A blocking member (5) is installed inside the outer shell (1), and the blocking member (5) is located at the bottom of the outer shell (1); the blocking member (5) is provided with an outwardly protruding edge.

5. The water-air separator according to claim 4, characterized in that, The blocking member (5) also includes a support frame (51), which has a tubular structure and multiple through holes (511) on its side wall; the bottom of the outer shell (1) forms an inwardly contracting section (13) at the transition point to the drain port (11), the contracting section (13) is located above the drain port (11), and the through holes (511) are located below the lower edge of the contracting section (13), so that the liquid on the inner wall of the outer shell (1) can flow into the drain port (11) through the through holes (511) after being collected by the contracting section (13).

6. The water-air separator according to claim 1, characterized in that, The housing (1) is equipped with a liquid level detection component (6). The liquid level detection component (6) includes a detection probe (61) and a fixing ring (62). The detection probe (61) is mounted on the fixing ring (62). The fixing ring (62) is fixed on the housing (1), and the detection probe (61) is set downward.

7. The water-air separator according to claim 6, characterized in that, The detection probe (61) is an adjustable structure, including a probe body (611) and a telescopic adjustment part (612). The telescopic adjustment part (612) is connected to a fixing ring (62) and is used to change the vertical detection height of the detection probe (61) to adapt to the detection requirements of different liquid level thresholds.

8. The water-air separator according to claim 1, characterized in that, The inner wall of the outer shell (1) is provided with a spiral guide rib (18), which extends along the axial direction of the outer shell (1) and is adapted to the tangential direction of the air inlet (12) to enhance the centrifugal effect of the gas rotation in the outer shell (1).

9. The water-air separator according to claim 1, characterized in that, The lower end of the air outlet (2) is provided with an anti-vortex cover (7). The anti-vortex cover (7) has a mesh structure and protrudes outward in an arc shape to prevent the gas from forming a local vortex at the inlet of the air outlet (2) and stirring up the liquid.

10. A dental negative pressure generating system comprising the water-air separator (100) according to any one of claims 1-9, characterized in that, It also includes a primary water-gas separation component and a negative pressure unit; the primary water-gas separation component, the water-gas separator (100) and the negative pressure unit are connected in sequence.

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