Disinfectant water return prevention system and dental chair

Abstract

The invention relates to the technical field of medical instruments, in particular to a disinfectant anti-water-return system and a dental chair, and the disinfectant anti-water-return system is characterized in that a disinfection part is provided with an air inlet and a liquid outlet; the air inlet pipe is communicated with the air inlet; the control piece is provided with a liquid inlet communicated with the liquid outlet and a liquid outlet communicated with a universal pipeline of the dental chair; the anti-seepage assembly is arranged at the air inlet, the air inlet channel assembly comprises an air inlet assembly and a blocking piece, an air inlet channel is formed in the air inlet assembly, the air inlet pipe communicates with the first end of the air inlet channel, and the blocking piece is arranged at the second end of the air inlet channel. The buoyancy assembly can drive the blocking piece to move in the direction close to or away from the air inlet channel along with changes of the liquid level of the disinfectant, so that the second end is blocked or released. According to the disinfectant water return prevention system, when the liquid level of the disinfectant rises, the disinfectant is used for providing buoyancy to enable the blocking piece to block the air inlet channel, then the situation that the disinfectant overflows is avoided, and the stability of the disinfection system and the overall pipeline of the dental chair is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a disinfectant anti-water backflow system and a dental chair. Background Art

[0002] Dental chairs are essential equipment in oral treatment, providing support and treatment for patients. After use, the dental chair pipelines need to be disinfected. There are two common dental chair pipeline disinfection systems. One is to directly connect the tap water pipeline to the disinfectant water. This method is more complicated to use and requires manual switching every time the disinfection is performed. The other is a disinfection system that integrates a built-in disinfection bottle and a switching pipeline. When disinfection is required, just switch to the disinfection mode, and the disinfection bottle can be used multiple times after filling once, so the second built-in disinfection system is currently used more often.

[0003] Since disinfectant is corrosive, the valve body connected to the disinfectant transmission pipeline is in contact with disinfectant for a long time, which will corrode over time and cause the valve body to leak. Since the solenoid valve connected to tap water is in a normally open state, once the valve body fails, it is easy for tap water to enter the disinfection bottle, causing the liquid level in the disinfection bottle to rise or even overflow from the air hole on the top of the disinfectant. It is also easy for tap water to directly enter the gas pipeline through the valve body, causing the disinfection system to fail. Summary of the invention

[0004] In view of this, the purpose of the present application is to provide a disinfectant anti-backflow system and a dental chair to solve the problem that the valve body in the existing dental chair disinfection system is easily damaged, causing tap water to enter the disinfection bottle, resulting in overflow of the disinfectant, and failing to meet the disinfection requirements of the dental chair pipeline.

[0005] A first aspect of the present invention provides a disinfectant anti-backflow system, wherein the disinfectant anti-backflow system comprises:

[0006] A disinfection element, used for containing disinfectant, and provided with an air inlet and a liquid discharge port;

[0007] an air inlet pipe, connected to the air inlet;

[0008] a control member having a liquid inlet connected to the liquid discharge port and a liquid outlet connected to a common pipeline of the dental chair;

[0009] An anti-seepage component is arranged at the air inlet, and the anti-seepage component includes an air inlet channel component and a buoyancy component arranged up and down, and the air inlet channel component includes an air inlet component and a blocking component. An air inlet channel is formed on the air inlet component, and the air inlet pipe is connected to the first end of the air inlet channel. The blocking component is arranged at the second end of the air inlet channel. The buoyancy component can drive the blocking component to move toward or away from the air inlet channel as the liquid level of the disinfectant changes, so as to achieve blocking or releasing the second end.

[0010] Preferably, the air intake assembly comprises:

[0011] A first channel member is arranged at the air inlet, a mounting hole is formed on the first channel member, and at least a part of the blocking member is arranged in the mounting hole;

[0012] The second channel member is connected to the mounting hole and the air intake pipe respectively; the air intake channel is provided on the second channel member.

[0013] Preferably, the first channel member is provided with a first detection circuit and a second detection circuit leading to the mounting hole, the first detection circuit and the second detection circuit are spaced apart, and the disinfectant entering the mounting hole can connect the first detection circuit and the second detection circuit.

[0014] Preferably, the buoyancy assembly comprises:

[0015] A support member connected to the air inlet assembly, wherein a receiving cavity is provided in the support member, the blocking member is installed on the top of the receiving cavity, and a hollow portion communicating with the receiving cavity is provided on the support member so that the disinfectant can enter the receiving cavity;

[0016] The buoyancy member is arranged in the accommodating chamber, and the disinfectant in the accommodating chamber can lift the buoyancy member, so that the buoyancy member drives the blocking member to move toward the direction close to the air inlet channel to achieve blocking of the second end.

[0017] Preferably, the disinfection element is also provided with a liquid filling port;

[0018] The disinfectant anti-water backflow system also includes:

[0019] A sealing cap assembly is arranged at the liquid filling port; the sealing cap assembly includes a cover body, a supporting member and a first sealing member, the supporting member is formed into an annular structure and a portion of the supporting member extends into the liquid filling port; the cover body is installed on the supporting member, a sealing portion is formed on the cover body and extends into the interior of the supporting member of the annular structure, a sealing groove is formed between the sealing portion and the inner wall of the supporting member, and the first sealing member is embedded in the sealing groove.

[0020] Preferably, the first sealing member is formed as a rotating body with a V-shaped cross-section, the V-shaped opening faces the disinfectant and the two side walls of the opening are respectively in contact with the sealing portion and the supporting member; when air is inflated and pressurized into the disinfection member, the gas can enter the opening and squeeze the two side walls outward.

[0021] Preferably, the control member comprises a first cover body, a second cover body, a flexible partition, a valve body and a valve core assembly; the flexible partition is arranged between the first cover body and the valve body; a first groove and a gas inlet are arranged on the first cover body, and the flexible partition covers the first groove to form a gas space communicating with the gas inlet;

[0022] The valve body is provided with a communication hole and a first liquid port connected with the communication hole, the flexible partition covers one end of the communication hole, and the second cover covers the other end of the communication hole;

[0023] The second cover body is provided with a second groove and a second liquid port communicating with the second groove, and the second groove is communicated with the communication hole to form a liquid space;

[0024] The valve core assembly is arranged in the liquid space, and a first sealing portion and a second sealing portion are formed on the valve core assembly, wherein the first sealing portion is sealed and connected to the hole wall of the communication hole, and the second sealing portion can block the connection between the second groove and the communication hole;

[0025] When the gas pressure in the gas space increases so that the volume of the gas space increases, the flexible partition pushes the first sealing part to drive the second sealing part to separate from the connecting part, thereby connecting the first liquid port and the second liquid port;

[0026] One of the first liquid port and the second liquid port is formed as the liquid inlet, and the other is formed as the liquid outlet.

[0027] Preferably, the valve core assembly comprises:

[0028] The valve core body has two ends in the axial direction respectively formed with a first boss and a second boss protruding radially outward, the circumferential side wall of the first boss is provided with a first recess, and the circumferential side wall of the second boss is provided with a second recess;

[0029] An elastic member is sleeved on the rod portion of the valve core body; a third boss extending inwardly is formed on the hole wall of the communicating hole, and two ends of the elastic member in the telescopic direction are respectively in contact with the first boss and the third boss;

[0030] A first sealing ring, disposed in the first recess, wherein a portion of the first sealing ring extends out of the first recess and abuts against a hole wall of the communicating hole;

[0031] The second sealing ring is arranged in the second recess, and part of the second sealing ring extends out of the second recess and abuts against the third boss; when the second sealing part is separated from the connecting part, the second sealing ring moves toward the direction of extending into the second groove.

[0032] Preferably, a first branch and a second branch are formed at the output end of the air inlet pipe, the first branch is communicated with the air inlet, and the second branch is communicated with the gas inlet;

[0033] The disinfectant anti-water backflow system also includes:

[0034] a first regulating member, disposed downstream of the liquid outlet, the first regulating member comprising a first liquid inlet, a second liquid inlet and a liquid outlet, the first liquid inlet being in communication with the liquid outlet, the second liquid inlet being in communication with an external water source, and the liquid outlet being in communication with the universal pipeline;

[0035] A second adjusting member is arranged on the first branch.

[0036] A second aspect of the present invention provides a dental chair, comprising the disinfectant anti-backflow system described in any of the above technical solutions.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] The disinfectant anti-backflow system of the present invention is provided with an anti-seepage component on the air inlet of the disinfectant. The buoyancy component can drive the blocking component to move toward or away from the air inlet channel as the liquid level of the disinfectant changes, so as to achieve blocking or releasing the second end of the air inlet channel. When the liquid level rises, the disinfectant is used to provide buoyancy so that the blocking component blocks the air inlet channel, thereby avoiding overflow of the disinfectant and ensuring the stability of the disinfection system and the overall pipeline of the dental chair.

[0039] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 A piping diagram of a disinfectant anti-backflow system provided by an embodiment of the present invention;

[0042] Figure 2 A schematic diagram of the structure of a disinfection component, an anti-seepage component and a capping component in a disinfectant anti-water backflow system provided in an embodiment of the present invention;

[0043] Figure 3 An exploded view of the structure of a disinfection component, an anti-seepage component and a sealing component in a disinfectant anti-water backflow system provided in an embodiment of the present invention;

[0044] Figure 4 A cross-sectional view of a disinfection component, an anti-seepage component and a sealing component in a disinfection liquid anti-water backflow system provided in an embodiment of the present invention;

[0045] Figure 5 for Figure 4 A schematic diagram of the enlarged structure at A in the middle;

[0046] Figure 6 for Figure 4 A schematic diagram of the enlarged structure at B in the middle;

[0047] Figure 7 A schematic diagram of the structure of a control component in a disinfectant anti-backflow system provided by an embodiment of the present invention;

[0048] Figure 8 An exploded view of the structure of the control component in the disinfectant anti-water backflow system provided by an embodiment of the present invention;

[0049] Fig. 9 A cross-sectional view of a control component in a disinfectant anti-backflow system provided in an embodiment of the present invention.

[0050] Icons: 10-disinfection part; 11-air inlet; 12-liquid discharge port; 13-liquid filling port; 20-air inlet pipe; 21-first branch; 22-second branch; 30-control part; 301-liquid inlet; 302-liquid outlet; 303-gas space; 304-liquid space; 31-first cover; 311-first groove; 312-gas inlet; 32-second cover; 321-second groove; 322-second liquid port; 33-flexible partition; 34-valve body; 341-communication hole; 3411-third boss; 342-first liquid port; 35-valve core assembly; 351-first sealing part; 3511-first boss; 3512-first recess; 3513-first sealing ring; 352-rod; 353-second sealing part; 3531-second boss; 3532-second recess; 3533-second sealing ring; 354-elastic member; 40-air inlet assembly; 41-first channel member; 410-mounting hole; 411-first connecting portion; 412-second connecting portion; 4101-first detection circuit; 4102-second detection circuit; 42-second channel member; 420-air inlet channel; 4201-first end; 4202-second end; 43-blocking member; 431-second sealing member; 50-buoyancy assembly; 51-support member; 510-accommodating chamber; 511-hollow portion; 52-buoyancy member; 61-cover body; 611-sealing portion; 6111-sealing groove; 612-clamping portion; 62-supporting member; 621-clamping portion; 63-first sealing member; 70-first adjusting member; 71-first liquid inlet portion; 72-second liquid inlet portion; 73-liquid outlet portion; 80-second adjusting member. DETAILED DESCRIPTION

[0051] The following specific embodiments are provided to help the reader obtain 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 an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0052] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been 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.

[0053] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0054] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0055] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0056] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations 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 relational terms used herein will be interpreted accordingly.

[0057] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0058] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0059] 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 are possible as will be apparent after understanding the disclosure of the present application.

[0060] According to a first aspect of the present invention, a disinfectant anti-backflow system is provided, which includes a disinfection component 10, a control component 30 and an anti-seepage component.

[0061] Hereinafter, the specific structures of the above-mentioned components of the disinfectant liquid anti-backflow system according to the present embodiment will be described.

[0062] In this embodiment, if Figures 1 to 4 As shown, the disinfection element 10 has a cavity for containing disinfectant. Specifically, the disinfection element 10 can be a disinfection bottle, a disinfection tank, a disinfection barrel, a disinfection box, or other containers, as long as they can contain disinfectant. Figure 1 and Figure 2 As shown, the disinfection element 10 is provided with an air inlet 11 , a liquid discharge port 12 and a liquid filling port 13 , and the air inlet 11 , the liquid discharge port 12 and the liquid filling port 13 are all through-hole structures communicating with the internal cavity of the disinfection element 10 .

[0063] like Figure 1 As shown, the air inlet pipe 20 is connected to the air inlet 11 for conveying gas, and the gas can be a compressed space; the control component 30 has a liquid inlet 301 connected to the liquid discharge port 12 and a liquid outlet 302 connected to the universal pipeline of the dental chair, so that the disinfectant flowing through the control component 30 flows from the liquid inlet 301 to the liquid outlet 302. In this embodiment, the disinfectant in the disinfection component 10 is discharged from the liquid discharge port 12 by the squeezing of the gas entering from the air inlet 11, and flows through the control valve into the universal pipeline of the dental chair to achieve the disinfection of the universal pipeline of the dental chair. It should be noted that in the prior art, the setting position of the control component 30 of this application usually adopts a water pressure valve. If the water pressure valve corrodes and fails, it is easy for tap water to enter the disinfection bottle through the water pressure valve.

[0064] In this embodiment, if Figures 2 to 4 As shown, the anti-seepage component is arranged at the air inlet 11. Specifically, the anti-seepage component includes an air inlet channel 420 component and a buoyancy component 50 arranged up and down, that is, the buoyancy component 50 is arranged below the air inlet channel 420 component, wherein the air inlet channel 420 component includes an air inlet component 40 and a blocking member 43, an air inlet channel 420 is formed on the air inlet component 40, and the air inlet pipe 20 is connected to the first end 4201 of the air inlet channel 420, so that the gas transported through the air inlet pipe 20 can pass through the air inlet channel 420 Enter the disinfection part 10; the blocking part 43 is arranged at the second end 4202 of the air inlet channel 420, and the buoyancy component 50 can drive the blocking part 43 to move towards or away from the air inlet channel 420 as the liquid level of the disinfectant changes, so as to achieve the blocking or release of the second end 4202, so that when the liquid level rises, the disinfectant is used to provide buoyancy so that the blocking part 43 can block the air inlet channel 420, thereby avoiding the overflow of the disinfectant and ensuring the stability of the disinfection system and the overall pipeline of the dental chair.

[0065] It should be noted that, in this embodiment, the direction of gas flow in the air inlet channel 420 can be from the first end 4201 to the second end 4202, for example, when inflating and pressurizing the disinfection element 10; however, the direction of gas flow in the air inlet channel 420 is not limited to this, but can also be from the second end 4202 to the first end 4201, for example, when releasing the air pressure in the disinfection element 10.

[0066] Furthermore, in this embodiment, if Figures 2 to 4 and Figure 6 As shown, the air intake assembly 40 includes a first channel member 41 and a second channel member 42. The first channel member 41 is arranged at the air intake port 11. The first channel member 41 can be fixed to the air intake port 11 by means of threaded connection, clamping or interference fit. A mounting hole 410 is opened on the first channel member 41. The mounting hole 410 is formed as a through hole structure that penetrates the first channel member 41, so that the first channel member 41 is formed into an annular cylindrical structure. At least part of the blocking member 43 is arranged in the mounting hole 410; the second channel member 42 is respectively connected to the mounting hole 410. The mounting hole 410 is connected to the intake pipe 20. Specifically, at least a portion of the second channel member 42 is embedded in the mounting hole 410, so that the second channel member 42 and the blocking member 43 are arranged along the axial direction of the mounting hole 410, and the second channel member 42 is arranged above the blocking member 43; the intake channel 420 as described above is opened on the second channel member 42, so that the second end 4202 of the intake channel 420 is connected to the mounting hole 410, and the blocking member 43 can block or release the second end 4202 of the intake channel 420.

[0067] In a preferred embodiment, Figure 6As shown, when the blocking member 43 blocks the air inlet channel 420, at least part of the blocking member 43 extends into the air inlet channel 420, thereby improving the blocking effect of the blocking member 43; along the direction in which the gas enters the disinfection member 10, the second end 4202 is formed into a flared structure with a gradually increasing radial size, that is, the second end 4202 is formed into a trumpet-shaped or funnel-shaped structure, and the second end 4202 and the blocking member 43 are preferably clearance-matched, so as to ensure that the blocking member 43 and the second end 4202 are separated when the liquid level drops; the anti-seepage component also includes a second sealing member 431 sleeved on the blocking member 43, and the second sealing member 431 is provided with a second sealing member 432. Part 431 can be an elastic sealing ring, and the second sealing part 431 is compressed and clamped between the second end 4202 and the sealing part 43, that is, the outer diameter of the second sealing part 431 is larger than the minimum radial dimension of the second end 4202 and smaller than the maximum outer diameter of the second end 4202, so that the second sealing part 431 can be stuck in the flared position to ensure the squeezing of the second sealing part 431. Under the condition of equal buoyancy, compared with the positive pressure squeezing the second end 4202 to form a flared structure, the sealing effect of the sealing part 43 during sealing can be improved, and the overflow of disinfectant can be effectively avoided.

[0068] In a preferred embodiment, Figure 4 and Figure 6 As shown, the first channel member 41 is provided with a first detection circuit 4101 and a second detection circuit 4102 leading to the mounting hole 410. The first detection circuit 4101 and the second detection circuit 4102 may be linear detection elements with a detection head, the detection head is exposed in the mounting hole 410, and the first detection circuit 4101 and the second detection circuit 4102 are formed as a wiring terminal at one end away from the detection head, and the wiring terminal is arranged on the outside of the first channel member 41, and the first detection circuit 4101 and the second detection circuit 4102 are arranged at intervals, that is, the first detection circuit 4101 and the second detection circuit 4102 are in a disconnected state under normal circumstances, and the disinfectant entering the mounting hole 410 can connect the first detection circuit 4101 and the second detection circuit 4102, so that when the liquid level in the disinfection bottle rises to contact the first detection circuit 4101 and the second detection circuit 4102, since the liquid has a certain conductivity, the first detection circuit 4101 and the second detection circuit 4102 can transmit the voltage signal to the alarm system after detecting the voltage signal, so as to remind the occurrence of liquid seepage.

[0069] In this embodiment, if Figure 4 and Figure 6As shown, the first channel member 41 includes a first connection portion 411 connected to the second channel member 42 and a second connection portion 412 connected to the buoyancy assembly 50, and the first detection line 4101 and the second detection line 4102 are arranged between the first connection portion 411 and the second connection portion 412, so as to achieve the fixation of the first detection line 4101 and the first detection line 4101 on the first channel member 41. The first connection portion 411 and the second connection portion 412 can be an integrated structure or a split structure; optionally, the first connection portion 411 is threadedly connected to the second channel member 42, and the second connection portion 412 is threadedly connected to the buoyancy assembly 50.

[0070] Further, in this embodiment, if Figure 4 and Figure 6 As shown, the buoyancy assembly 50 includes a support member 51 and a buoyancy member 52. The support member 51 is connected to the air intake assembly 40. The support member 51 can be fixed on the mounting hole 410. A receiving cavity 510 is provided in the support member 51. The blocking member 43 is installed on the top of the receiving cavity 510. A hollow portion 511 connected to the receiving cavity 510 is provided on the support member 51. The hollow portion 511 can be a hole-shaped structure provided at the bottom and / or side wall of the support member 51, so that the receiving cavity 510 It is connected to the interior of the disinfection component 10, and the disinfectant can enter the accommodating chamber 510, and the liquid level of the disinfectant in the accommodating chamber 510 is flush with the liquid level of the disinfectant outside the supporting component 51. The buoyancy component 52 is arranged in the accommodating chamber 510, and the buoyancy component 52 is a hollow floating ball inside. The disinfectant in the accommodating chamber 510 can hold up the buoyancy component 52, so that the buoyancy component 52 drives the blocking component 43 to move toward the direction close to the air inlet channel 420, so as to achieve the blocking of the second end 4202.

[0071] In this embodiment, the buoyancy member 52 can be a sphere, a cube, a polygonal prism or other structures, as long as the buoyancy member 52 can at least partially float above the liquid surface, so as to drive the blocking member 43 to block the second end 4202 before the disinfectant enters the air inlet channel 420. In this embodiment, the timing of driving the blocking member 43 to block the second end 4202 and the liquid level of the disinfectant in the disinfection member 10 can be adjusted by changing the volume and / or number of the buoyancy member 52, so that the blocking can be selected in advance when the liquid level of the disinfectant is at a preset distance from the second end 4202, so as to improve the reliability of avoiding liquid seepage. When a plurality of buoyancy members 52 are provided, the plurality of buoyancy members 52 are arranged in the vertical direction.

[0072] In this embodiment, if Figures 2 to 5As shown, the disinfectant anti-backflow system also includes: a sealing assembly arranged at the liquid filling port 13, which can replenish disinfectant into the interior of the disinfection component 10 through the liquid filling port 13, and the sealing assembly can block the liquid filling port 13; specifically, the sealing assembly includes a cover body 61, a supporting member 62 and a first sealing member 63, the supporting member 62 is formed into an annular structure and a part of the supporting member 62 extends into the liquid filling port 13, and the supporting member 62 can be threadedly connected to the liquid filling port 13; the cover body 61 is installed on the part of the supporting member 62 extending out of the liquid filling port 13.

[0073] In a preferred embodiment, Figure 4 and Figure 5 As shown, a protruding holding portion 621 is provided on the outer wall of the portion of the supporting member 62 extending out of the liquid filling port 13, and at least a portion of the holding portion 621 is formed as an inclined strip structure, and a protruding holding protrusion 612 is formed on the side wall of the cover body 61 facing the supporting member 62 to match with the holding portion 621 to achieve a snap fit between the cover body 61 and the supporting member 62.

[0074] More specifically, in this embodiment, if Figure 4 and Figure 5 As shown, a sealing portion 611 is formed on the cover body 61 and extends into the interior of the supporting member 62 of the annular structure. The sealing portion 611 is formed into a block structure. The sealing portion 611 and the cover body 61 can be integrally formed or set as a split structure. A sealing groove 6111 is formed between the sealing portion 611 and the inner wall of the supporting member 62. The first sealing member 63 is embedded in the sealing groove 6111, so as to achieve the sealing assembly of the cover body 61 and the supporting member 62. In this embodiment, the sealing groove 6111 is preferably formed by the circumferential side wall of the sealing portion 611 being recessed inwardly so as not to damage the structure of the supporting member 62 and ensure the structural strength; in other optional embodiments, the circumferential side wall of the sealing portion 611 and the inner wall of the supporting member 62 are recessed respectively to form the sealing groove 6111 together; or the sealing groove 6111 can also be directly formed on the inner wall of the supporting member 62.

[0075] In a preferred embodiment, Figure 4 and Figure 5 As shown, the first sealing member 63 is formed as a rotating body with a V-shaped cross-section, that is, the first sealing member 63 is formed by rotating the V-shaped cross-section along the axis as the rotation axis for one circle, the V-shaped opening faces the disinfectant and the two side walls of the opening are respectively in contact with the sealing portion 611 and the supporting member 62; when air is inflated and pressurized into the disinfection member 10, the gas can enter the opening and squeeze the two side walls outward, so that the contact between the two side walls and the sealing portion 611 and the supporting member 62 is closer, thereby preventing air leakage.

[0076] In this embodiment, if Figure 1 and Figures 7 to 9As shown, the control component 30 includes a first cover body 31, a second cover body 32, a flexible partition 33, a valve body 34 and a valve core assembly 35; the flexible partition 33 is arranged between the first cover body 31 and the valve body 34, and the flexible partition 33 can be a flexible diaphragm; the first cover body 31 is provided with a first groove 311 and a gas inlet 312, and the gas inlet 312 is connected to the first groove 311; the flexible partition 33 covers the first groove 311, so that the flexible partition 33 and the first groove 311 together enclose a gas space 303 connected to the gas inlet 312, and the gas space 303 can be inflated and pressurized through the gas inlet 312. Since the flexible partition 33 is flexible, the volume of the gas space 303 can change with the gas in the gas space 303.

[0077] like Figures 7 to 9 As shown, the valve body 34 is provided with a connecting hole 341 and a first liquid port 342 connected to the connecting hole 341, the connecting hole 341 runs through the middle of the valve body 34, the flexible partition 33 covers one end of the connecting hole 341, and the second cover body 32 covers the other end of the connecting hole 341; the second cover body 32 is provided with a second groove 321 and a second liquid port 322 connected to the second groove 321, the second groove 321 and the connecting hole 341 are connected to form a liquid space 304; the valve core assembly 35 is arranged in the liquid space 304, and the valve core assembly 35 is formed with a first sealing portion 351 and a second sealing portion 353, the first sealing portion 351 is sealed and connected to the hole wall of the connecting hole 341, and the second sealing portion 353 is sealed and connected to the hole wall of the connecting hole 341. The sealing portion 353 can seal the connection between the second groove 321 and the connecting hole 341; when the gas pressure in the gas space 303 increases so that the volume of the gas space 303 increases, the flexible partition 33 bulges toward one side of the valve body 34, so that the flexible partition 33 pushes the first sealing portion 351 to drive the second sealing portion 353 to disengage from the connection between the second groove 321 and the connecting hole 341, thereby realizing the connection between the first liquid port 342 and the second liquid port 322; in the present embodiment, one of the first liquid port 342 and the second liquid port 322 is formed as the liquid inlet 301 of the control component 30, and the other of the first liquid port 342 and the second liquid port 322 is formed as the liquid outlet 302 of the control component 30.

[0078] Furthermore, in this embodiment, if Figure 8 and Fig. 9As shown, the valve core assembly 35 includes a valve body 34, an elastic member 354, a first sealing ring 3513 and a second sealing ring 3533. A rod portion 352 is arranged on the valve core body. The first sealing portion 351 and the second sealing portion 353 are arranged at both ends of the length direction of the rod portion 352. The two ends of the rod portion 352 in the axial direction are respectively formed with a first boss 3511 and a second boss 3531 protruding radially outward. The first boss 3511 and the first sealing ring 3513 form a first sealing portion 351, and the second boss 3531 and the second sealing ring 3533 form a second sealing portion 353.

[0079] Specifically, the circumferential side wall of the first boss 3511 is provided with a first recess 3512, and the circumferential side wall of the second boss 3531 is provided with a second recess 3532, and the first recess 3512 and the second recess 3532 are formed into an annular groove structure; the elastic member 354 can be a spring, and the elastic member 354 is sleeved on the outer wall of the rod portion 352 on the valve core body; the hole wall of the connecting hole 341 is formed with a third boss 3411 extending inwardly, and the third boss 3411 is formed into an annular plate structure, and the rod portion 352 can slide in the ring of the third boss 3411, and the two ends of the elastic member 354 in the telescopic direction are respectively abutted against the first boss 3511 and the third boss 3411, and when the gas space 303 is pressurized so that When the flexible partition 33 bulges toward the side close to the valve body 34, it can abut against the first boss 3511 and push the first boss 3511 to move toward the direction close to the third boss 3411 to squeeze the elastic member 354, so that the second sealing portion 353 is not in contact with the connection between the second groove 321 and the connecting hole 341, thereby realizing the connection between the first liquid port 342 and the second liquid port 322; when the pressure in the gas space 303 is released, the elastic member 354 is reset to push the first boss 3511 to move in the direction away from the third boss 3411, so that the second sealing portion 353 blocks the connection between the second groove 321 and the connecting hole 341, thereby realizing the blocking of the first liquid port 342 and the second liquid port 322.

[0080] like Figure 8 and Fig. 9 As shown, the first sealing ring 3513 is formed into an annular structure and is arranged in the first recess 3512, and part of the first sealing ring 3513 extends out of the first recess 3512 and abuts against the hole wall of the connecting hole 341 to prevent the liquid between the first boss 3511 and the third boss 3411 from flowing to the side of the first boss 3511 facing the flexible partition 33; the second sealing ring 3533 is formed into an annular structure and is arranged in the second recess 3532, and part of the second sealing ring 3533 extends out of the second recess 3532 and abuts against the third boss 3411; when the second sealing portion 353 is separated from the connecting portion, the second sealing ring 3533 moves in the direction of extending into the second groove 321.

[0081] In a preferred embodiment, the outer surfaces of the first sealing ring 3513 and the second sealing ring 3533 are provided with a protective layer, and the protective layer is preferably made of PTFE material to have a certain anti-corrosion ability, extend the service life of the control part 30, reduce the corrosion effect of the disinfectant on the first sealing ring 3513 and the second sealing ring 3533, and ensure that the flexible partition 33 is not damaged, so as to add a line of defense to reduce the risk of failure of the control part 30, so as to form a double protection with the anti-seepage component, thereby ensuring the airtightness between the first liquid port 342 and the second liquid port 322, further reducing the risk of external water source backflowing from the control part 30 into the disinfection part 10, and ensuring the stability of the overall pipeline of the dental chair. It should be noted that the inside of the first sealing ring 3513 and the second sealing ring 3533 is made of flexible rubber material to ensure the flexibility of the first sealing ring 3513 and the second sealing ring 3533.

[0082] In addition, in this embodiment, Figure 1 As shown, the output end of the air inlet pipe 20 is formed with a first branch 21 and a second branch 22, the first branch 21 is connected to the air inlet 11 on the disinfection element 10, and the second branch 22 is connected to the gas inlet 312 on the control element 30; the disinfectant anti-backflow system also includes a first regulating member 70 and a second regulating member 80, the first regulating member 70 is arranged downstream of the liquid outlet 302 of the control element 30, the first regulating member 70 has a first liquid inlet 71, a second liquid inlet 72 and a liquid outlet 73, the first liquid inlet 71 is connected to the liquid outlet 302, the second liquid inlet 72 is connected to an external water source, the external water source is usually tap water, and the liquid outlet 73 is connected to the universal pipeline on the dental chair, so that the liquid outlet 73 can be selected to be connected to the first liquid inlet 71 to provide disinfectant for the universal pipeline on the dental chair, or the liquid outlet 73 can be selected to be connected to the second liquid inlet 72 to provide water for the universal pipeline on the dental chair. The first regulating member 70 can be a water solenoid valve.

[0083] like Figure 1 As shown, the second regulating member 80 is disposed on the first branch 21 , and the second regulating member 80 may be a two-position two-way solenoid valve to control whether gas is added into the disinfection member 10 .

[0084] According to the disinfectant anti-backflow system of the present invention, an anti-seepage component is arranged on the air inlet of the disinfection part, and the buoyancy component can drive the blocking part to move in the direction close to or away from the air inlet channel as the liquid level of the disinfectant changes, so as to achieve the blocking or release of the second end of the air inlet channel, so that the blocking part is used to block the air inlet channel when the liquid level rises, thereby avoiding the overflow of the disinfectant; a protective layer is arranged on the outer side of the first sealing ring and the second sealing ring on the control part to delay the control part from being corroded and failed by the disinfectant; a first detection circuit and a second detection circuit are also arranged to connect to the alarm system to establish an early warning, so that the liquid outside the disinfection part will not flow back into the disinfection part and will not overflow from the disinfection part, thereby ensuring the stability of the disinfection system and the overall pipeline of the dental chair.

[0085] A dental chair provided according to the present invention comprises the disinfectant anti-water backflow system as described above, and thus has all the beneficial effects of the disinfectant anti-water backflow system, which will not be described in detail herein.

[0086] Finally, it should be noted that the above-described embodiments are only specific implementation methods 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 is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; 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 be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A disinfectant anti-backflow system, characterized in that: The disinfectant anti-water backflow system comprises: A disinfection element, used for containing disinfectant, and provided with an air inlet and a liquid discharge port; an air inlet pipe, connected to the air inlet; a control member having a liquid inlet connected to the liquid discharge port and a liquid outlet connected to a common pipeline of the dental chair; An anti-seepage component is arranged at the air inlet, and the anti-seepage component includes an air inlet channel component and a buoyancy component arranged up and down, and the air inlet channel component includes an air inlet component and a blocking component. An air inlet channel is formed on the air inlet component, and the air inlet pipe is connected to the first end of the air inlet channel. The blocking component is arranged at the second end of the air inlet channel. The buoyancy component can drive the blocking component to move toward or away from the air inlet channel as the liquid level of the disinfectant changes, so as to achieve blocking or releasing the second end.

2. The disinfectant anti-water backflow system according to claim 1, characterized in that: The air intake assembly comprises: A first channel member is arranged at the air inlet, a mounting hole is formed on the first channel member, and at least a part of the blocking member is arranged in the mounting hole; The second channel member is connected to the mounting hole and the air intake pipe respectively; the air intake channel is provided on the second channel member.

3. The disinfectant anti-water backflow system according to claim 2, characterized in that: The first channel member is provided with a first detection circuit and a second detection circuit leading to the mounting hole, the first detection circuit and the second detection circuit are arranged at intervals, and the disinfectant entering the mounting hole can conduct the first detection circuit and the second detection circuit.

4. The disinfectant anti-water backflow system according to claim 1, characterized in that: The buoyancy assembly comprises: A support member connected to the air inlet assembly, wherein a receiving cavity is provided in the support member, the blocking member is installed on the top of the receiving cavity, and a hollow portion communicating with the receiving cavity is provided on the support member so that the disinfectant can enter the receiving cavity; The buoyancy member is arranged in the accommodating chamber, and the disinfectant in the accommodating chamber can lift the buoyancy member, so that the buoyancy member drives the blocking member to move toward the direction close to the air inlet channel to achieve blocking of the second end.

5. The disinfectant anti-backflow system according to claim 1, characterized in that: The disinfection element is also provided with a liquid filling port; The disinfectant anti-water backflow system also includes: A sealing cap assembly is arranged at the liquid filling port; the sealing cap assembly includes a cover body, a supporting member and a first sealing member, the supporting member is formed into an annular structure and a portion of the supporting member extends into the liquid filling port; the cover body is installed on the supporting member, a sealing portion is formed on the cover body and extends into the interior of the supporting member of the annular structure, a sealing groove is formed between the sealing portion and the inner wall of the supporting member, and the first sealing member is embedded in the sealing groove.

6. The disinfectant anti-water backflow system according to claim 5, characterized in that: The first sealing member is formed as a rotating body with a V-shaped cross-section, the V-shaped opening faces the disinfectant and the two side walls of the opening are respectively in contact with the sealing portion and the supporting member; when air is inflated and pressurized into the disinfectant, the gas can enter the opening and squeeze the two side walls outward.

7. The disinfectant anti-water backflow system according to claim 1, characterized in that: The control member comprises a first cover body, a second cover body, a flexible partition, a valve body and a valve core assembly; the flexible partition is arranged between the first cover body and the valve body; a first groove and a gas inlet are arranged on the first cover body, and the flexible partition covers the first groove to form a gas space communicating with the gas inlet; The valve body is provided with a communication hole and a first liquid port connected with the communication hole, the flexible partition covers one end of the communication hole, and the second cover covers the other end of the communication hole; The second cover body is provided with a second groove and a second liquid port communicating with the second groove, and the second groove is communicated with the communication hole to form a liquid space; The valve core assembly is arranged in the liquid space, and a first sealing portion and a second sealing portion are formed on the valve core assembly, wherein the first sealing portion is sealed and connected to the hole wall of the communication hole, and the second sealing portion can block the connection between the second groove and the communication hole; When the gas pressure in the gas space increases so that the volume of the gas space increases, the flexible partition pushes the first sealing part to drive the second sealing part to separate from the connecting part, thereby connecting the first liquid port and the second liquid port; One of the first liquid port and the second liquid port is formed as the liquid inlet, and the other is formed as the liquid outlet.

8. The disinfectant anti-water backflow system according to claim 7, characterized in that: The valve core assembly comprises: The valve core body has two ends in the axial direction respectively formed with a first boss and a second boss protruding radially outward, the circumferential side wall of the first boss is provided with a first recess, and the circumferential side wall of the second boss is provided with a second recess; An elastic member is sleeved on the rod portion of the valve core body; a third boss extending inwardly is formed on the hole wall of the communicating hole, and two ends of the elastic member in the telescopic direction are respectively in contact with the first boss and the third boss; A first sealing ring, disposed in the first recess, wherein a portion of the first sealing ring extends out of the first recess and abuts against a hole wall of the communicating hole; The second sealing ring is arranged in the second recess, and part of the second sealing ring extends out of the second recess and abuts against the third boss; when the second sealing part is separated from the connecting part, the second sealing ring moves toward the direction of extending into the second groove.

9. The disinfectant anti-water backflow system according to claim 7, characterized in that: The output end of the air inlet pipe is formed with a first branch and a second branch, the first branch is communicated with the air inlet, and the second branch is communicated with the gas inlet; The disinfectant anti-water backflow system also includes: a first regulating member, disposed downstream of the liquid outlet, the first regulating member comprising a first liquid inlet, a second liquid inlet and a liquid outlet, the first liquid inlet being in communication with the liquid outlet, the second liquid inlet being in communication with an external water source, and the liquid outlet being in communication with the universal pipeline; A second adjusting member is arranged on the first branch.

10. A dental chair, characterized in that: A disinfectant anti-water backflow system comprising any one of claims 1 to 9.

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