One-way conduction structure for water-gas separation system of dental chair

Abstract

The utility model relates to the technical field of medical instruments, in particular to a one-way conduction structure for a water-gas separation system of a dental chair, which is characterized in that a liquid storage cavity is formed in a tank body, and a water-gas inlet and a liquid outlet are formed in the tank body; the one-way conduction assemblies are arranged at the water vapor inlet and the liquid outlet respectively, so that a one-way circulation path is formed at the water vapor inlet and the liquid outlet; the one-way conduction assembly comprises a mounting seat, a reset part and a blocking part, a conduction hole is formed in the mounting seat, the reset part is connected with the blocking part, and the reset part is in sliding connection with the conduction hole so as to drive the blocking part to abut against the mounting seat to seal the conduction hole or drive the blocking part to move in the direction away from the mounting seat to open the conduction hole. According to the utility model, the direction of the circulation path of the water vapor inlet is only from the outside of the tank body to the inside of the tank body, and the direction of the circulation path of the liquid outlet is only from the inside of the tank body to the outside of the tank body, so that the conditions of backward flow and reverse flow of the water vapor inlet and the liquid outlet are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a one-way conduction structure for a water-air separation system of a dental chair. Background Art

[0002] A dental comprehensive treatment chair, also known as a dental comprehensive treatment machine, is usually simply called a dental chair. As an important device in the modern dental medical field for oral surgery and the examination and treatment of oral diseases, it provides a flat position for patients to facilitate doctors to observe oral problems of patients. When treating patients, it is often necessary to aspirate the liquid in the patient's oral cavity under negative pressure. The water and gas enter the water-air separation device through the drainage system and are separated into gas and liquid by the water-air separation device and discharged respectively. The existing water-air separation device is prone to backflow when starting negative pressure. Summary of the Utility Model

[0003] In view of this, the purpose of this application is to provide a one-way conduction structure for a water-air separation system of a dental chair to solve the problem that the existing water-air separation system of a dental chair is prone to backflow when starting negative pressure.

[0004] The utility model provides a one-way conduction structure for a water-air separation system of a dental chair, which includes:

[0005] A tank body, inside which a liquid storage cavity is formed. A water-air inlet and a liquid discharge port communicating with the liquid storage cavity are opened on the tank body;

[0006] A one-way conduction component, which is respectively arranged at the water-air inlet and the liquid discharge port to form a single-direction flow path at the water-air inlet and the liquid discharge port;

[0007] The one-way conduction component includes a mounting seat, a resetting member and a blocking member. A guiding through hole is opened on the mounting seat. One end of the resetting member located downstream of the flow path is connected to the blocking member. The resetting member is slidably connected to the guiding through hole to drive the blocking member to abut against the mounting seat to close the guiding through hole, or drive the blocking member to move away from the mounting seat to open the guiding through hole.

[0008] Preferably, the resetting member includes a guide rod and a spring. One end of the guide rod in the axial direction forms a protruding first limiting portion. The spring is sleeved on the circumferential side wall of the guide rod, and both ends in its telescopic direction respectively abut against the first limiting portion and the mounting seat.

[0009] Preferably, one end of the guide rod away from the spring is connected to the blocking member, and the guiding through hole is located between the blocking member and the spring.

[0010] Preferably, the other end of the guide rod in the axial direction is formed with a protruding second limiting portion, and the plugging member abuts against the second limiting portion.

[0011] Preferably, a guiding portion and a supporting portion are formed inside the guiding through hole. The guiding portion is sleeved on the circumferential side wall of the guide rod, the supporting portion is connected to the outer wall of the guiding portion and the inner wall of the guiding through hole respectively, and the spring abuts against the supporting portion.

[0012] Preferably, when there is negative pressure in the liquid storage cavity and / or there is no liquid in the liquid storage cavity, the plugging member located at the liquid discharge port abuts against the mounting seat to block the guiding through hole located at the liquid discharge port;

[0013] When there is no negative pressure in the liquid storage cavity and the liquid storage cavity is filled with liquid, the gravity of the liquid drives the plugging member located at the liquid discharge port to move away from the mounting seat to open the guiding through hole located at the liquid discharge port.

[0014] Preferably, when there is negative pressure in the liquid storage cavity, the spring arranged at the water-gas inlet is compressed, so that the plugging member moves away from the mounting seat to open the guiding through hole located at the water-gas inlet; when there is no negative pressure in the liquid storage cavity, the spring arranged at the water-gas inlet resets to drive the guide rod to slide, so that the plugging member moves towards the mounting seat to block the guiding through hole located at the water-gas inlet.

[0015] Preferably, it further includes:

[0016] A reinforcing member is arranged at one end of the plugging member away from the guiding through hole.

[0017] Preferably, the outer wall of the mounting seat is formed into a stepped structure. The mounting seat includes a first step portion and a second step portion. The radial dimension of the first step portion is larger than that of the second step portion. One of the first step portion and the second step portion is embedded in the water-gas inlet or the liquid discharge port, and the other is embedded in a pipeline communicated with the water-gas inlet or the liquid discharge port.

[0018] Preferably, an annular groove is formed on the side wall of the first step portion and / or the second step portion;

[0019] The one-way conduction structure for the water-gas separation system of a dental chair further includes:

[0020] A sealing member is arranged in the annular groove.

[0021] Compared with the prior art, the beneficial effects of the present utility model are:

[0022] The one-way conduction structure for the water-air separation system of a dental chair according to the present utility model, the one-way conduction components are respectively arranged at the water-air inlet and the liquid discharge port to form a single-direction flow path between the water-air inlet and the liquid discharge port. The one-way conduction components include a mounting seat, a reset member, and a blocking member. The reset member can drive the blocking member to move towards the direction close to the mounting seat so that the blocking member abuts against the mounting seat to close the guiding through hole. The reset member can also drive the blocking member to move away from the mounting seat, so that the blocking member is separated from the mounting seat, thereby opening the guiding through hole. In this way, the direction of the flow path of the water-air inlet is only from the outside of the tank body to the inside of the tank body, and the direction of the flow path of the liquid discharge port is only from the inside of the tank body to the outside of the tank body, thereby avoiding the situation of backflow and reverse flow at the water-air inlet and the liquid discharge port.

[0023] To make the above objects, features, and advantages of the present application more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, makes a detailed description as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 The structural schematic diagram of the one-way conduction structure for the water-air separation system of a dental chair provided by the embodiment of the present utility model;

[0026] Figure 2 The sectional structural schematic diagram of the one-way conduction structure for the water-air separation system of a dental chair provided by the embodiment of the present utility model;

[0027] Figure 3 For Figure 2 The enlarged structural schematic diagram at A in

[0028] Figure 4 The structural schematic diagram of the one-way conduction component in the one-way conduction structure for the water-air separation system of a dental chair provided by the embodiment of the present utility model;

[0029] Figure 5 The exploded structural schematic diagram of the one-way conduction component in the one-way conduction structure for the water-air separation system of a dental chair provided by the embodiment of the present utility model;

[0030] Figure 6 The structural schematic diagram of the mounting seat in the one-way conduction structure for the water-air separation system of a dental chair provided by the embodiment of the present utility model.

[0031] Icons: 10 - tank body; 11 - liquid storage cavity; 12 - water - gas inlet; 13 - liquid discharge port; 14 - exhaust port; 20 - mounting base; 21 - first stepped portion; 22 - second stepped portion; 201 - guide through - hole; 202 - guiding portion; 203 - supporting portion; 30 - reset member; 31 - guide rod; 311 - first limiting portion; 312 - second limiting portion; 32 - spring; 40 - plugging member; 50 - reinforcing member; 60 - sealing member; 70 - pipeline. Detailed implementation manners

[0032] The following detailed implementation manners are provided to assist the reader in obtaining a comprehensive understanding of the methods, devices, and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications, and equivalents of the methods, devices, and / or systems described herein will be apparent. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein. Rather, changes that will be apparent after understanding the disclosure of the present application can be made, except for operations that must occur in a specific order. In addition, descriptions of features known in the art may be omitted for the sake of clarity and conciseness.

[0033] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided only to illustrate some of the many possible ways of implementing the methods, devices, and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0034] Throughout the specification, when an element (such as a layer, region, or substrate) is described as "on" another element, "connected to" another element, "coupled to" another element, "above" another element, or "covering" another element, it can be directly "on" another element, "connected to" another element, "coupled to" another element, "above" another element, or "covering" another element, or there can be one or more other elements between them. In contrast, when an element is described as "directly on" another element, "directly connected to" another element, "directly coupled to" another element, "directly above" another element, or "directly covering" another element, there can be no other elements between them.

[0035] As used herein, the term "and / or" includes any one of the listed related items and any combination of any two or more of them.

[0036] Although terms such as "first", "second", and "third" may be used herein to describe various components, elements, regions, layers, or sections, these components, elements, regions, layers, or sections are not limited by these terms. Rather, these terms are only used to distinguish one component, element, region, layer, or section from another. Thus, the first component, element, region, layer, or section referred to in the examples described herein may also be referred to as the second component, element, region, layer, or section without departing from the teachings of the examples.

[0037] For ease of description, spatial relationship terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another as shown in the drawings. Such spatial relationship terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is flipped, an element described as "above" or "upper" relative to another element will then be "below" or "lower" relative to the other element. Thus, the term "above" includes both the orientations of "above" and "below" depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relationship terms used herein will be interpreted accordingly.

[0038] The terms used herein are for the purpose of describing various examples only and are not intended to limit the disclosure. Unless the context clearly dictates otherwise, the singular forms are also intended to include the plural forms. The terms "comprises", "comprising", and "having" list the stated features, quantities, operations, components, elements, and / or combinations thereof that exist, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0039] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Thus, the examples described herein are not limited to the specific shapes shown in the drawings but include changes in shape that occur during manufacturing.

[0040] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations will be possible as will be apparent after understanding the disclosure of the present application.

[0041] A one-way conduction structure for a dental chair water and gas separation system according to a first aspect of the present utility model includes a tank body 10 and a one-way conduction assembly.

[0042] In the following, the specific structures of the above components of the one-way conduction structure for the water-air separation system of the dental chair according to this embodiment will be described.

[0043] In this embodiment, as Figure 1 and Figure 2 shown, the tank body 10 can be a container in the shape of a cylinder or a polyhedron. A liquid storage cavity 11 is formed inside the tank body 10. A water-air inlet 12, a liquid discharge port 13, and an exhaust port 14 communicating with the liquid storage cavity 11 are provided on the tank body 10; the water-air inlet 12 and the exhaust port 14 are preferably arranged at the top of the tank body 10, and the liquid discharge port 13 is preferably arranged at the bottom of the tank body 10. The water-air inlet 12 is connected to the dental chair pipeline. The sucked water-air enters the tank body 10 through the water-air inlet 12. Among them, the liquid part enters the liquid storage cavity 11, and the gas part can be discharged from the exhaust port 14; the exhaust port 14 is connected to a negative pressure device, so that there is a negative pressure inside the tank body 10. In this way, power is provided for the water-air to flow from the water-air inlet 12 into the liquid storage cavity 11, and power is also provided for the gas to be discharged from the exhaust port 14. In this embodiment, the negative pressure device can be a negative pressure machine.

[0044] It should be noted that in this embodiment, when it is necessary to discharge the liquid in the liquid storage cavity 11, the negative pressure device is closed, so that there is no negative pressure in the liquid storage cavity 11, so as to facilitate the liquid to be discharged from the tank body 10.

[0045] Specifically, in this embodiment, as Figures 2 to 5 shown, one-way conduction components are respectively arranged at the water-air inlet 12 and the liquid discharge port 13, that is, two one-way conduction components are provided. One of the two one-way conduction components is installed at the water-air inlet 12 and the other is installed at the liquid discharge port 13. In this way, the water-air inlet 12 and the liquid discharge port 13 respectively form a single-direction flow path. In this way, the direction of the flow path of the water-air inlet 12 is from the outside of the tank body 10 to the inside of the tank body 10, so that the water-air can only flow into the liquid storage cavity 11 from the water-air inlet 12; and the direction of the flow path of the liquid discharge port 13 is only from the inside of the tank body 10 to the outside of the tank body 10, so that the liquid in the liquid storage cavity 11 flows out from the liquid discharge port 13, thereby avoiding the situation of backflow and countercurrent at the water-air inlet 12 and the liquid discharge port 13.

[0046] Specifically, as Figures 3 to 5As shown, the one-way conduction component includes a mounting base 20, a reset member 30, and a plugging member 40. The mounting base 20 is formed as a block structure, and a through hole 201 penetrating through its main body is formed on the mounting base 20, that is, the through hole 201 is formed as a through hole structure penetrating through the main body of the mounting base 20 to allow water vapor or liquid to pass through. The plugging member 40 is disposed on one side of the reset member 30 located downstream of the flow path. The reset member 30 passes through the through hole 201 and is slidably connected to the through hole 201 to drive the plugging member 40 to move toward the direction close to the mounting base 20 so that the plugging member 40 abuts against the mounting base 20 and completely covers the through hole 201, thereby closing the through hole 201. In addition, the reset member 30 can also drive the plugging member 40 to move away from the mounting base 20, so that the plugging member 40 is separated from the mounting base 20, thereby opening the through hole 201 to allow water vapor or liquid to pass through.

[0047] In this embodiment, as Figure 1 and Figure 2 shown, when there is negative pressure in the liquid storage cavity 11 and / or there is no liquid in the liquid storage cavity 11, the plugging member 40 located at the liquid discharge port 13 abuts against the mounting base 20 to plug the through hole 201 located at the liquid discharge port 13; when there is no negative pressure in the liquid storage cavity 11 and the liquid storage cavity 11 is filled with liquid, the gravity of the liquid drives the plugging member 40 located at the liquid discharge port 13 to move away from the mounting base 20 to open the through hole 201 located at the liquid discharge port 13, thereby discharging the liquid in the liquid storage cavity 11.

[0048] Further, in this embodiment, as Figure 1 and Figure 2 shown, when there is negative pressure in the liquid storage cavity 11, the spring 32 disposed at the water vapor inlet 12 is compressed, so that the plugging member 40 moves away from the mounting base 20 to open the through hole 201 located at the water vapor inlet 12, thereby allowing water vapor to enter the liquid storage cavity 11; when there is no negative pressure in the liquid storage cavity 11, the spring 32 disposed at the water vapor inlet 12 resets to drive the guide rod 31 to slide, so that the plugging member 40 moves toward the direction close to the mounting base 20 to plug the through hole 201 located at the water vapor inlet 12.

[0049] More specifically, in this embodiment, as Figures 3 to 5As shown, the reset member 30 includes a guide rod 31 and a spring 32. The guide rod 31 is formed as a bar-shaped rod structure, such as a cylindrical rod structure. The axial direction of the guide rod 31 preferably extends along its sliding direction. A protruding first limiting portion 311 is formed at one end of the guide rod 31 in the axial direction. The first limiting portion 311 can be formed as a boss structure protruding radially outward from the side wall of the guide rod 31. The spring 32 is sleeved on the circumferential side wall of the guide rod 31, and both ends in its telescopic direction are respectively in contact with the first limiting portion 311 and the mounting base 20. In this way, the spring 32 can be compressed during the sliding process of the guide rod 31, so that the reset member 30 is in an energy storage state. After the acting force driving the guide rod 31 to slide is removed, the spring 32 elongates to drive the guide rod 31 to reset.

[0050] In this embodiment, as Figures 3 to 5 shown, one end of the guide rod 31 away from the spring 32 is connected to the plugging member 40, that is, both ends in the length direction of the guide rod 31 are respectively connected to the plugging member 40 and the spring 32; in the axial direction of the guide rod 31, the guide through hole 201 is located between the plugging member 40 and the spring 32. In this way, it is ensured that when the spring 32 moves in the direction away from the guide through hole 201 against the elastic force, it can drive the plugging member 40 to completely cover the guide through hole 201, thereby preventing the water vapor inside the tank body 10 from flowing out through the water vapor inlet 12, or preventing the liquid outside the tank body 10 from entering the inside of the tank body 10 through the liquid discharge port 13.

[0051] Furthermore, in this embodiment, as Figure 4 and Figure 5 shown, a protruding second limiting portion 312 is formed at the other end of the guide rod 31 in the axial direction. The plugging member 40 abuts against the second limiting portion 312, so as to axially limit the plugging member 40 and prevent the plugging member 40 from falling off the guide rod 31. Preferably, the guide rod 31 can be formed as a bolt-nut structure, where the first limiting portion 311 is the head of the screw rod and the second limiting portion 312 is the nut, so that the second limiting portion 312 can be threadedly connected to the main body of the guide rod 31. In this way, it is convenient to adjust the position of the plugging member 40 on the guide rod 31, thereby realizing the adjustment of the pressure when the one-way conduction assembly is opened.

[0052] Even further, in this embodiment, as Figure 6As shown, a guide portion 202 and a support portion 203 are formed inside the conducting hole 201, the guide portion 202 is formed as a sleeve structure, the guide portion 202 is sleeved on the circumferential side wall of the guide rod 31, the support portion 203 is respectively connected to the outer wall of the guide portion 202 and the inner wall of the conducting hole 201, the spring 32 abuts against the support portion 203, the support portion 203 can be formed as a plate-like structure, plays the role of connecting the guide portion 202 and the conducting hole 201, and can provide support force for the spring 32. Preferably, a plurality of support portions 203 are provided, and the plurality of support portions 203 are arranged at intervals in the circumferential direction around the guide portion 202 to provide uniform force support for the spring 32.

[0053] In this embodiment, the one-way conduction structure for the dental chair water-gas separation system further includes a reinforcing member 50, which can be formed into a plate-like structure that is arranged in close contact with the plugging member 40. The reinforcing member 50 is arranged at one end of the plugging member 40 away from the conducting hole 201 to provide support for the plugging member 40 to prevent the plugging member 40 from deforming and thus failing to close the conducting hole 201. Preferably, the mechanical structural strength of the material of the reinforcing member 50 is greater than the mechanical structural strength of the material of the plugging member 40.

[0054] In addition, in this embodiment, Figures 3 to 5 As shown, the outer wall of the mounting seat 20 is formed as a stepped boss structure. Specifically, the mounting seat 20 includes a first step portion 21 and a second step portion 22. The radial dimension of the first step portion 21 is greater than the radial dimension of the second step portion 22. One of the first step portion 21 and the second step portion 22 is embedded in the water vapor inlet 12 or the drain port 13, and the other is embedded in a pipe 70 connected to the water vapor inlet 12 and the drain port 13.

[0055] In an alternative embodiment, Figure 3 As shown, the second step portion 22 on the mounting seat 20 of the water and gas inlet 12 is embedded in the inner wall of the water and gas inlet 12, and the end of the first step portion 21 abuts against the end of the water and gas inlet 12, so that the mounting seat 20 is clamped and positioned, and the pipe 70 connected to the water and gas inlet 12 is installed on the outer wall of the first step portion 21, so that the one-way conduction component plays the role of switching and connecting the water and gas inlet 12 and the pipe 70; Figure 2 As shown, the circumferential side wall of the first step portion 21 installed on the mounting seat 20 of the drain port 13 is sealedly connected to the inner wall of the drain port 13, and the circumferential side wall of the second step portion 22 abuts against the inner wall of the pipe 70 connected to the drain port 13, thereby realizing the transfer connection between the drain port 13 and the pipe 70.

[0056] Furthermore, in this embodiment, if Figure 4 and Figure 5As shown, annular grooves are formed in the side walls of the first step portion 21 and / or the second step portion 22; the one-way conduction structure for the dental chair water-air separation system further includes a seal 60 disposed in the annular groove, so as to ensure the sealing performance of the connection between the mounting seat 20 and the pipeline 70 and / or the water-air inlet 12 and / or the liquid discharge port 13, thereby ensuring that the vacuum in the tank body 10 meets the requirements of water-air separation. The seal 60 can be an annular sealing ring, and a part of the seal 60 extends out of the annular groove to ensure the sealing effect.

[0057] According to the one-way conduction structure for the dental chair water-air separation system of the present invention, the one-way conduction components are respectively disposed at the water-air inlet and the liquid discharge port to form a single-direction flow path at the water-air inlet and the liquid discharge port. The one-way conduction components include a mounting seat, a reset member, and a plugging member. The reset member can drive the plugging member to move towards the direction close to the mounting seat so that the plugging member abuts against the mounting seat to close the conduction hole. The reset member can also drive the plugging member to move away from the mounting seat, so that the plugging member is separated from the mounting seat, thereby opening the conduction hole. In this way, the direction of the flow path of the water-air inlet is only from the outside of the tank body to the inside of the tank body, and the direction of the flow path of the liquid discharge port is only from the inside of the tank body to the outside of the tank body, thereby avoiding the backflow and reverse flow of the water-air inlet and the liquid discharge port.

[0058] Finally, it should be noted that the above embodiments are only specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: any person skilled in the art within the technical scope disclosed in the present application can still modify the technical solutions recorded in the foregoing embodiments or can easily think of changes, or perform equivalent replacements on some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A one-way conduction structure for a water-air separation system of a dental chair, characterized in that Comprising: A tank body, inside which a liquid storage cavity is formed. A water-vapor inlet and a liquid discharge port communicating with the liquid storage cavity are provided on the tank body; A one-way conduction assembly, respectively arranged at the water-vapor inlet and the liquid discharge port to form a single-direction flow path at the water-vapor inlet and the liquid discharge port; The one-way conduction assembly includes a mounting seat, a reset member and a plugging member. A guiding through-hole is provided on the mounting seat. One end of the reset member located downstream of the flow path is connected to the plugging member. The reset member is slidably connected to the guiding through-hole to drive the plugging member to abut against the mounting seat to close the guiding through-hole, or drive the plugging member to move away from the mounting seat to open the guiding through-hole.

2. The one-way conduction structure for the water-air separation system of a dental chair according to claim 1, characterized in that The reset member includes a guiding rod and a spring. One end of the guiding rod in the axial direction forms a protruding first limiting portion. The spring is sleeved on the circumferential side wall of the guiding rod, and both ends in its telescopic direction respectively abut against the first limiting portion and the mounting seat.

3. The one-way conduction structure for the water-air separation system of a dental chair according to claim 2, characterized in that, The end of the guiding rod away from the spring is connected to the plugging member, and the guiding through-hole is located between the plugging member and the spring.

4. The one-way conduction structure for the water-air separation system of a dental chair according to claim 2, characterized in that The other end of the guiding rod in the axial direction forms a protruding second limiting portion, and the plugging member abuts against the second limiting portion.

5. The one-way conduction structure for the water-air separation system of a dental chair according to claim 2, characterized in that, A guiding portion and a supporting portion are formed inside the guiding through-hole. The guiding portion is sleeved on the circumferential side wall of the guiding rod. The supporting portion is respectively connected to the outer wall of the guiding portion and the inner wall of the guiding through-hole, and the spring abuts against the supporting portion.

6. The one-way conduction structure for the water-air separation system of a dental chair according to claim 2, characterized in that When there is negative pressure in the liquid storage cavity and / or there is no liquid in the liquid storage cavity, the plugging member located at the liquid discharge port abuts against the mounting seat to block the guiding through-hole located at the liquid discharge port; When there is no negative pressure in the liquid storage cavity and the liquid storage cavity is filled with liquid, the gravity of the liquid drives the plugging member located at the liquid discharge port to move away from the mounting seat to open the guiding through-hole located at the liquid discharge port.

7. The one-way conduction structure for the water-air separation system of a dental chair according to claim 2, characterized in that, When there is negative pressure in the liquid storage cavity, the spring provided at the water-vapor inlet is compressed, so that the plugging member moves away from the mounting seat to open the guiding through-hole located at the water-vapor inlet; when there is no negative pressure in the liquid storage cavity, the spring provided at the water-vapor inlet resets to drive the guiding rod to slide, so that the plugging member moves towards the mounting seat to block the guiding through-hole located at the water-vapor inlet.

8. The one-way conduction structure for the water-air separation system of a dental chair according to claim 1, characterized in that, Further comprising: A reinforcing member, provided at one end of the plugging member away from the guiding through-hole.

9. The one-way conduction structure for the water-air separation system of a dental chair according to claim 1, characterized in that, The outer wall of the mounting seat is formed into a stepped structure. The mounting seat includes a first stepped portion and a second stepped portion. The radial dimension of the first stepped portion is larger than that of the second stepped portion. One of the first stepped portion and the second stepped portion is embedded in the water-vapor inlet or the liquid discharge port, and the other is embedded in a pipeline communicating with the water-vapor inlet or the liquid discharge port.

10. The one-way conduction structure for the water-air separation system of a dental chair according to claim 9, characterized in that, A ring groove is provided on the side wall of the first stepped portion and / or the second stepped portion; The one-way conduction structure for the dental chair water-vapor separation system further includes: A sealing member, provided in the ring groove.

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