Disinfectant solution anti-backflow system and dental chair

Abstract

The present application relates to the technical field of medical apparatus and instruments, in particular to a disinfectant solution anti-backflow system and a dental chair, the disinfectant solution anti-backflow system comprising: a disinfecting member, an air inlet and a liquid outlet being formed on the disinfecting member; an air inlet pipe being in communication with the air inlet; a control member having a liquid inlet in communication with the liquid outlet and a liquid outlet in communication with a general pipeline of the dental chair; a seepage prevention assembly being arranged at the air inlet, the air inlet passage assembly comprising an air inlet assembly and a blocking member, the air inlet assembly being formed with an air inlet passage, the air inlet pipe being in communication with a first end of the air inlet passage, the blocking member being arranged at a second end of the air inlet passage, and a buoyancy assembly being capable of driving the blocking member to move towards the direction of being close to or away from the air inlet passage with the change of the liquid level of the disinfectant solution, so as to realize the blocking or releasing of the second end. The disinfectant solution anti-backflow system of the present application utilizes the disinfectant solution to provide buoyancy to block the air inlet passage when the liquid level of the disinfectant solution rises, thereby avoiding the overflow of the disinfectant solution and ensuring the stability of the disinfecting system and the general pipeline of the dental chair.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a disinfectant solution anti-backflow system and a dental chair. BACKGROUND

[0002] A dental chair is an essential device in oral treatment, which provides support and treatment for patients. After use, the dental chair pipeline needs to be disinfected. There are two common disinfection systems for dental chair pipelines. One is to directly connect the pipeline of tap water to the disinfectant solution. This method is relatively complex to use, and the user needs to manually switch each time disinfection is required. The other is a disinfection system integrated with a built-in disinfectant bottle and a switching pipeline. When disinfection is required, the disinfection mode can be switched, and the disinfectant bottle can be used multiple times after one-time filling. Therefore, the second disinfection system with a built-in disinfectant bottle is currently more commonly used.

[0003] Since the disinfectant solution is corrosive, the valve body connected to the disinfectant solution transmission pipeline is in contact with the disinfectant solution for a long time, which can easily cause corrosion of the valve body, resulting in water leakage. Since the electromagnetic valve connected to the tap water is in a normally open state, once the valve body fails, tap water can easily enter the disinfectant bottle, causing the liquid level in the disinfectant bottle to rise or even overflow from the gas hole at the top of the disinfectant bottle. Tap water can also directly enter the gas pipeline through the valve body, causing the disinfection system to fail. SUMMARY

[0004] Therefore, the present application aims to provide a disinfectant solution 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 disinfectant bottle and resulting in overflow of the disinfectant solution, which cannot meet the disinfection requirements of the dental chair pipeline.

[0005] The first aspect of the present application provides a disinfectant solution anti-backflow system, wherein the disinfectant solution anti-backflow system comprises:

[0006] a disinfectant element for containing a disinfectant solution, the disinfectant element being provided with an air inlet and a liquid outlet;

[0007] an air inlet pipe in communication with the air inlet;

[0008] a control element having a liquid inlet in communication with the liquid outlet and a liquid outlet in communication with a general pipeline of a dental chair;

[0009] The anti-seepage assembly is arranged at the air inlet, and comprises an air inlet channel assembly and a buoyancy assembly arranged in sequence from top to bottom. The air inlet channel assembly comprises an air inlet assembly and a blocking piece. The air inlet assembly is formed with an air inlet channel. The air inlet pipe is communicated with a first end of the air inlet channel. The blocking piece is arranged at a second end of the air inlet channel. The buoyancy assembly can drive the blocking piece to move towards the air inlet channel or away from the air inlet channel according to the change of the liquid level of the disinfectant, so as to block or release the second end.

[0010] Preferably, the air inlet assembly comprises:

[0011] The first channel piece is arranged at the air inlet, and is formed with a mounting hole. At least part of the blocking piece is arranged in the mounting hole.

[0012] The second channel piece is connected with the mounting hole and the air inlet pipe respectively. The second channel piece is formed with the air inlet channel.

[0013] Preferably, the first channel piece is provided with a first detection circuit and a second detection circuit leading into the mounting hole. The first detection circuit and the second detection circuit are arranged in a spaced manner. The disinfectant entering the mounting hole can make the first detection circuit and the second detection circuit conductive.

[0014] Preferably, the buoyancy assembly comprises:

[0015] The support piece is connected with the air inlet assembly. The support piece is provided with a receiving cavity. The blocking piece is arranged at the top of the receiving cavity. The support piece is formed with a hollow part communicated with the receiving cavity, so that the disinfectant can enter the receiving cavity.

[0016] The buoyancy piece is arranged in the receiving cavity. The disinfectant in the receiving cavity can lift the buoyancy piece, so that the buoyancy piece drives the blocking piece to move towards the air inlet channel, so as to block the second end.

[0017] Preferably, the disinfecting piece is further formed with a liquid adding port.

[0018] The disinfectant anti-backflow system further comprises:

[0019] The cover assembly is arranged at the liquid adding port. The cover assembly comprises a cover body, a supporting piece and a first sealing piece. The supporting piece is formed in an annular structure, and part of the supporting piece extends into the liquid adding port. The cover body is arranged on the supporting piece. The cover body is formed with a sealing part extending into the inside of the annular structure of the supporting piece. A sealing groove is formed between the sealing part and the inner wall of the supporting piece. The first sealing piece is embedded in the sealing groove.

[0020] Preferably, the first sealing member is formed as a rotation body with a V-shaped section, an opening of the V shape faces the disinfecting liquid, and two side walls of the opening abut against the sealing part and the supporting member respectively; when the disinfecting member is inflated and pressurized, the gas can enter the opening and extrude the two side walls outward.

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

[0022] The valve body is provided with a communication hole and a first liquid outlet communicating with the communication hole, one end of the communication hole is covered by the flexible partition, and the other end of the communication hole is covered by the second cover;

[0023] The second cover is provided with a second recess and a second liquid outlet communicating with the second recess, and the second recess and the communication hole communicate to form a liquid space;

[0024] The valve core assembly is arranged in the liquid space, and the valve core assembly is formed with a first sealing part and a second sealing part, the first sealing part is sealingly connected with the hole wall of the communication hole, and the second sealing part can block the communication between the second recess and the communication hole;

[0025] When the gas pressure in the gas space increases and 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 communication part, so that the first liquid outlet and the second liquid outlet communicate;

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

[0027] Preferably, the valve core assembly comprises:

[0028] A valve core body, two ends of the valve core body in the axial direction are respectively formed with a first boss and a second boss protruding outward in the radial direction, a first recess is arranged on the circumferential side wall of the first boss, and a second recess is arranged on the circumferential side wall of the second boss;

[0029] An elastic member is sleeved on the rod portion of the valve core body; the hole wall of the communication hole is formed with a third boss extending inward, and the two ends of the elastic member in the extension direction abut against the first boss and the third boss respectively;

[0030] A first sealing ring is arranged in the first recess, and part of the first sealing ring extends out of the first recess and abuts against a hole wall of the communication hole;

[0031] A 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 communication position, the second sealing ring moves towards the direction of extending into the second recess.

[0032] Preferably, 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;

[0033] The disinfectant anti-backflow system further comprises:

[0034] A first adjusting member is arranged downstream of the liquid outlet, and the first adjusting member has a first liquid inlet portion, a second liquid inlet portion and a liquid outlet portion, the first liquid inlet portion is communicated with the liquid outlet, the second liquid inlet portion is communicated with an external water source, and the liquid outlet portion is communicated with the general pipeline;

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

[0036] The second aspect of the present application provides a dental chair comprising the disinfectant anti-backflow system according to any one of the technical solutions.

[0037] Compared with the prior art, the disinfectant anti-backflow system has the following beneficial effects:

[0038] The disinfectant anti-backflow system of the present application is provided with a permeation prevention assembly on the air inlet of the disinfecting member, and the buoyancy assembly can drive the sealing member to move towards the direction of approaching or moving away from the air inlet channel according to the change of the liquid level of the disinfectant, so as to realize the sealing or release of the second end of the air inlet channel, thereby providing the buoyancy of the disinfectant when the liquid level rises to make the sealing member seal the air inlet channel, and further avoiding the overflow of the disinfectant, and ensuring the stability of the disinfecting system and the overall pipeline of the dental chair.

[0039] In order to make the above-mentioned purposes, characteristics and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0041] Figure 1 A pipeline diagram of the disinfectant anti-backflow system provided for the embodiment of the present application;

[0042] Figure 2 A structure diagram of the disinfectant, the anti-seepage assembly and the cover assembly in the disinfectant anti-backflow system provided for the embodiment of the present application;

[0043] Figure 3 An exploded view of the disinfectant, the anti-seepage assembly and the cover assembly in the disinfectant anti-backflow system provided for the embodiment of the present application;

[0044] Figure 4 A sectional view of the disinfectant, the anti-seepage assembly and the cover assembly in the disinfectant anti-backflow system provided for the embodiment of the present application;

[0045] Figure 5 A structure diagram of the disinfectant, the anti-seepage assembly and the cover assembly in the disinfectant anti-backflow system provided for the embodiment of the present application; Figure 4 An enlarged structure diagram of A in the above;

[0046] Figure 6 A structure diagram of the control member in the disinfectant anti-backflow system provided for the embodiment of the present application; Figure 4 An enlarged structure diagram of B in the above;

[0047] Figure 7 An exploded view of the control member in the disinfectant anti-backflow system provided for the embodiment of the present application;

[0048] Figure 8 A sectional view of the control member in the disinfectant anti-backflow system provided for the embodiment of the present application.

[0049] Figure 9 A sectional view of the control member in the disinfectant anti-backflow system provided for the embodiment of the present application.

[0050] Icon: 10 - sterilization element; 11 - air inlet; 12 - liquid outlet; 13 - liquid inlet; 20 - air inlet pipe; 21 - first branch; 22 - second branch; 30 - control element; 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 protrusion; 342 - first liquid port; 35 - valve core assembly; 351 - first sealing part; 3511 - first protrusion; 3512 - first recess; 3513 - first sealing ring; 352 - rod part; 353 - second sealing part; 3531 - second protrusion; 3532 - second recess; 3533 - second sealing ring; 354 - elastic element; 40 - air inlet assembly; 41 - first channel element; 410 - mounting hole; 411 - first connecting part; 412 - second connecting part; 4101 - first detection circuit; 4102 - second detection circuit; 42 - second channel element; 420 - air inlet channel; 4201 - first end; 4202 - second end; 43 - plugging element; 431 - second sealing element; 50 - buoyancy assembly; 51 - support element; 510 - accommodating cavity; 511 - hollow part; 52 - buoyancy element; 61 - cover; 611 - sealing part; 6111 - sealing groove; 612 - clamping protrusion; 62 - supporting element; 621 - clamping part; 63 - first sealing element; 70 - first adjusting element; 71 - first liquid inlet part; 72 - second liquid inlet part; 73 - liquid outlet part; 80 - second adjusting element. DETAILED DESCRIPTION

[0051] The following detailed description is presented to aid in understanding the method, apparatus and / or system described herein. It is not intended to limit the method, apparatus and / or system described herein to the details described. Rather, various changes, modifications and equivalents can be employed, once the disclosure is understood. For example, the order of the operations described herein is merely exemplary and the operations can be carried out in a different order than described herein, or the operations can be carried out in parallel, except where the order of the operations is essential to the method, apparatus and / or system described herein. Furthermore, it should be understood that features described herein can be combined in different ways and that various modifications can be made by those skilled in the art without departing from the scope of the disclosure. Also, it is intended that only such limitations in scope be imposed by the appended claims.

[0052] The features described herein can be implemented in different forms and should not be construed as limited to the examples described herein. Rather, these examples have been provided so that this disclosure will be thorough and complete, and will fully convey the scope of the method, apparatus and / or system to those skilled in the art. Further, the description should be understood to include any alterations and modifications to the examples described herein, and every combination and permutation of the elements described herein.

[0053] Throughout the specification, when an element (such as a layer, region or substrate) is referred to as being "on" another element, "connected to" another element, "coupled to" another element, "adjacent to" another element, "on top of" another element, or "covering" another element, it can be directly on, connected to, coupled to, adjacent to, on top of, or covering the other element, or one or more other elements can be interposed therebetween. In contrast, when an element is referred to as being "directly on", "directly connected to", "directly coupled to", "directly adjacent to", "directly on top of", or "directly covering" another element, there are no other elements interposed therebetween.

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

[0055] Although terms such as "first" and "second" and "third" can be used herein to describe various components, assemblies, regions, layers or sections, these components, assemblies, regions, layers or sections are not limited by these terms. Rather, these terms are only used to distinguish one component, assembly, region, layer or section from another component, assembly, region, layer or section. Thus, a component, assembly, region, layer or section referred to as a first component, assembly, region, layer or section in one example described herein can also be referred to as a second component, assembly, region, layer or section in another example without departing from the teachings of the examples.

[0056] For ease of description, spatial relationship terms, such as "on", "upper", "beneath", and "lower", can be used herein with respect to the orientation of one element relative to another element as shown in the figures. Such spatial relationship terms can be intended to encompass different orientations of the device in use or operation, in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, a component described as relative to another component on the "upper" side of another component would then be oriented on the "lower" side of that component. Accordingly, the term "on" encompasses both an "on" and "under" orientation depending on the spatial orientation of the device. The device can be oriented in other ways (e.g., rotated 90 degrees or at other orientations) and an appropriate modification to the spatial relationship terminology used herein will be made accordingly.

[0057] The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including" and "has" are listed means the stated features, integers, operations, components, elements and / or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, operations, components, elements and / or combinations thereof.

[0058] Due to manufacturing techniques and / or tolerances, variations in the shapes of the components shown in the figures can occur. Therefore, the examples described herein are not intended to be limited to the particular shapes of the components shown in the figures, but include deviations in shapes that would be apparent to one of ordinary skill in the art upon viewing the disclosure herein.

[0059] Features of the examples described herein can be combined with one another as would be apparent to one of ordinary skill in the art after viewing the disclosure herein. Furthermore, although examples herein have been described with various configurations, other configurations are possible as would be apparent to one of ordinary skill in the art after viewing the disclosure herein.

[0060] According to the first aspect of the present application, a disinfectant solution anti-backflow system is provided, which comprises a disinfecting member 10, a control member 30 and a barrier assembly.

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

[0062] In the present embodiment, as shown in Figures 1 to 4 , the interior of the disinfecting member 10 is formed with a cavity for containing disinfectant solution, and specifically, the disinfecting member 10 can be a disinfecting bottle, a disinfecting tank, a disinfecting barrel or a disinfecting box, etc. as long as it can contain disinfectant solution. As shown in Figure 1 and Figure 2 , the disinfecting member 10 is provided with an air inlet 11, a liquid outlet 12 and a liquid inlet 13, and the air inlet 11, the liquid outlet 12 and the liquid inlet 13 are all through-hole structures communicating with the interior cavity of the disinfecting member 10.

[0063] As shown in Figure 1 , the air inlet pipe 20 communicates with the air inlet 11 and is used for conveying gas, and the gas can be compressed air; the control member 30 is provided with a liquid inlet 301 communicating with the liquid outlet 12 and a liquid outlet 302 communicating with the general pipeline of the dental chair, so that the disinfectant solution flowing through the control member 30 flows from the liquid inlet 301 to the liquid outlet 302. In the present embodiment, the disinfectant solution in the disinfecting member 10 is discharged from the liquid outlet 12 by the extrusion of the gas entering from the air inlet 11 and flows through the control valve into the general pipeline of the dental chair to achieve disinfection of the general pipeline of the dental chair. It should be noted that in the prior art, the position of the control member 30 is usually provided with a water pressure valve, and the corrosion failure of the water pressure valve is prone to cause tap water to enter the disinfecting bottle through the water pressure valve.

[0064] In the present embodiment, as shown in Figures 2 to 4 The anti-infiltration assembly is arranged at the air inlet 11, and specifically, the anti-infiltration assembly includes an air inlet channel 420 assembly and a buoyancy assembly 50 arranged in a top-bottom manner, that is, the buoyancy assembly 50 is arranged below the air inlet channel 420 assembly. The air inlet channel 420 assembly includes an air inlet assembly 40 and a blocking piece 43. The air inlet assembly 40 is formed with an air inlet channel 420. The air inlet pipe 20 is in communication with a first end 4201 of the air inlet channel 420, so that the gas conveyed through the air inlet pipe 20 can enter the sterilization device 10 through the air inlet channel 420. The blocking piece 43 is arranged at a second end 4202 of the air inlet channel 420. The buoyancy assembly 50 can drive the blocking piece 43 to move towards or away from the air inlet channel 420 to block or release the second end 4202, so as to block the air inlet channel 420 by the sterilization liquid when the liquid level rises to provide buoyancy, thereby avoiding overflow of the sterilization liquid and ensuring the stability of the sterilization system and the overall pipeline of the dental chair.

[0065] It should be noted that, in the present embodiment, the flow direction of the gas in the air inlet channel 420 can be from the first end 4201 to the second end 4202, for example, when the air inlet channel 420 is inflated to pressurize the sterilization device 10. Then, the flow direction of the gas in the air inlet channel 420 is not limited to this, and can also be from the second end 4202 to the first end 4201, for example, when the air pressure of the sterilization device 10 is released.

[0066] Further, in the present embodiment, as shown in Figures 2 to 4 and Figure 6 The air inlet assembly 40 includes a first channel piece 41 and a second channel piece 42. The first channel piece 41 is arranged at the air inlet 11 and can be fixed to the air inlet 11 by threaded connection, clamping or interference fit. The first channel piece 41 is formed as an annular cylindrical structure with a mounting hole 410 formed as a through hole structure penetrating through the first channel piece 41, so that at least part of the blocking piece 43 is arranged in the mounting hole 410. The second channel piece 42 is connected with the mounting hole 410 and the air inlet pipe 20, respectively. Specifically, at least part of the second channel piece 42 is embedded in the mounting hole 410, so that the second channel piece 42 and the blocking piece 43 are arranged along the axial direction of the mounting hole 410, and the second channel piece 42 is arranged above the blocking piece 43. As described above, the air inlet channel 420 is formed in the second channel piece 42, so that the second end 4202 of the air inlet channel 420 is in communication with the mounting hole 410, and the blocking piece 43 can block or release the second end 4202 of the air inlet channel 420.

[0067] In the preferred embodiment, as shown in Figure 6As shown, at least part of the blocking member 43 extends into the air inlet channel 420 when the blocking member 43 blocks the air inlet channel 420, thus improving the blocking effect of the blocking member 43; the second end 4202 is formed as a flared structure with gradually increasing radial dimension in the direction of gas entering the sterilization member 10, i.e., the second end 4202 is formed as a bell mouth or a funnel structure, and the second end 4202 is preferably in clearance fit with the blocking member 43, so as to ensure that the blocking member 43 is separated from the second end 4202 when the liquid level drops; the anti-seepage assembly further comprises a second sealing member 431 sleeved on the blocking member 43, the second sealing member 431 can be an elastic sealing ring, and the second sealing member 431 is clamped in a compressed state between the second end 4202 and the blocking member 43, i.e., the outer diameter of the second sealing member 431 is greater than the minimum radial dimension of the second end 4202 and less than the maximum outer diameter of the second end 4202, so that the second sealing member 431 can be clamped at the flared position to ensure the extrusion of the second sealing member 431, and under the condition of the same buoyancy, compared with the extrusion of the second end 4202 formed as a flared structure by positive pressure, the sealing effect of the blocking member 43 during blocking can be improved, and the overflow of the sterilization liquid can be effectively avoided.

[0068] In the preferred embodiment, as shown in Figure 4 and Figure 6 The first channel member 41 is provided with a first detection circuit 4101 and a second detection circuit 4102 leading into the mounting hole 410, the first detection circuit 4101 and the second detection circuit 4102 can be linear detection elements with detection heads, the detection heads are exposed in the mounting hole 410, and the ends of the first detection circuit 4101 and the second detection circuit 4102 away from the detection heads are formed as connection ends, the connection ends are arranged outside the first channel member 41, and the first detection circuit 4101 and the second detection circuit 4102 are arranged in a spaced manner, i.e., the first detection circuit 4101 and the second detection circuit 4102 are in a disconnected state under normal circumstances, and the sterilization liquid entering the mounting hole 410 can conduct the first detection circuit 4101 and the second detection circuit 4102, so that when the liquid level in the sterilization bottle rises to contact the first detection circuit 4101 and the second detection circuit 4102, the first detection circuit 4101 and the second detection circuit 4102 can transmit the voltage signal to the alarm system to remind the occurrence of liquid seepage due to the certain conductivity of the liquid.

[0069] In the embodiment, as shown in Figure 4 and Figure 6As shown, the first channel member 41 includes a first connecting portion 411 connected with the second channel member 42 and a second connecting portion 412 connected with the buoyancy assembly 50, the first detection circuit 4101 and the second detection circuit 4102 are arranged between the first connecting portion 411 and the second connecting portion 412, so as to realize the fixation of the first detection circuit 4101 and the second detection circuit 4101 on the first channel member 41. The first connecting portion 411 and the second connecting portion 412 can be an integral structure or a split structure; alternatively, the first connecting portion 411 is threadedly connected with the second channel member 42, and the second connecting portion 412 is threadedly connected with the buoyancy assembly 50.

[0070] Further, in the present embodiment, as shown in 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 with the air inlet assembly 40, the support member 51 can be fixed on the mounting hole 410, the support member 51 is internally provided with a receiving cavity 510, the blocking member 43 is mounted on the top of the receiving cavity 510, the support member 51 is provided with a hollow portion 511 in communication with the receiving cavity 510, the hollow portion 511 can be a hole structure arranged on the bottom and / or the side wall of the support member 51, so that the receiving cavity 510 is in communication with the inside of the disinfecting member 10, the disinfecting liquid can enter the receiving cavity 510, and the liquid level of the disinfecting liquid in the receiving cavity 510 is flush with the liquid level of the disinfecting liquid outside the support member 51, the buoyancy member 52 is arranged in the receiving cavity 510, the buoyancy member 52 is a hollow float ball, the disinfecting liquid in the receiving cavity 510 can lift the buoyancy member 52, so that the buoyancy member 52 drives the blocking member 43 to move towards the direction close to the air inlet channel 420, so as to realize the blocking of the second end 4202.

[0071] In the present embodiment, the buoyancy member 52 can be a spherical body, a cubic body or a polygonal prism structure, as long as the buoyancy member 52 can be at least partially floated above the liquid level, so as to drive the blocking member 43 to block the second end 4202 before the disinfecting liquid enters the air inlet channel 420. In the present embodiment, the volume and / or the number of the buoyancy member 52 can be changed, so as to realize the adjustment of the timing of driving the blocking member 43 to block the second end 4202 and the liquid level of the disinfecting liquid in the disinfecting member 10, so that the blocking can be performed in advance when the liquid level of the disinfecting liquid and the second end 4202 have a preset distance, so as to improve the reliability of avoiding liquid penetration. When a plurality of buoyancy members 52 are arranged, the plurality of buoyancy members 52 are arranged along the vertical direction.

[0072] In the present embodiment, as shown in Figures 2 to 5As shown, the disinfectant liquid anti-backflow system further comprises a cover assembly arranged at the liquid filling opening 13, disinfectant liquid can be filled into the disinfectant element 10 through the liquid filling opening 13, and the cover assembly can block the liquid filling opening 13. Specifically, the cover assembly comprises a cover body 61, a supporting element 62, and a first sealing element 63. The supporting element 62 is formed in an annular structure, and part of the supporting element 62 extends into the liquid filling opening 13. The supporting element 62 can be threadedly connected with the liquid filling opening 13. The cover body 61 is mounted on the part of the supporting element 62 extending out of the liquid filling opening 13.

[0073] In a preferred embodiment, as shown in Figure 4 and Figure 5 The part of the supporting element 62 extending out of the liquid filling opening 13 is provided with a protruding clamping portion 621. At least part of the clamping portion 621 is formed in an inclined strip structure. A clamping protrusion 612 is formed on one side of the side wall of the cover body 61 facing the supporting element 62, so as to match the clamping portion 621, thereby achieving clamping connection of the cover body 61 and the supporting element 62.

[0074] More specifically, in the present embodiment, as shown in Figure 4 and Figure 5 The cover body 61 is formed with a sealing portion 611 extending into the interior of the annular structure of the supporting element 62. The sealing portion 611 is formed in a block structure. The sealing portion 611 and the cover body 61 can be integrally formed or can be provided in a split structure. A sealing groove 6111 is formed between the sealing portion 611 and the inner wall of the supporting element 62. The first sealing element 63 is embedded in the sealing groove 6111, thereby achieving sealed assembly of the cover body 61 and the supporting element 62. In the present embodiment, the sealing groove 6111 is preferably formed by inwardly recessing the circumferential side wall of the sealing portion 611, so as not to damage the structure of the supporting element 62 and ensure the structural strength. In other alternative embodiments, the circumferential side wall of the sealing portion 611 and the inner wall of the supporting element 62 are respectively recessed to jointly form the sealing groove 6111. Alternatively, the sealing groove 6111 can be directly formed on the inner wall of the supporting element 62.

[0075] In a preferred embodiment, as shown in Figure 4 and Figure 5 The first sealing element 63 is formed in a V-shaped cross-section rotating body, i.e., the first sealing element 63 is formed by rotating one turn along the axis of the V-shaped cross-section, and the opening of the V shape faces the disinfectant liquid and the two side walls of the opening abut against the sealing portion 611 and the supporting element 62, respectively. When the disinfectant element 10 is inflated and pressurized, the gas can enter the opening and extrude the two side walls outward, so that the two side walls are in closer contact with the sealing portion 611 and the supporting element 62, thereby preventing gas leakage.

[0076] In the present embodiment, as shown in Figure 1 and Figures 7 to 9As shown, the control member 30 comprises a first cover 31, a second cover 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 31 and the valve body 34, and can be a flexible diaphragm; the first cover 31 is provided with a first recess 311 and a gas inlet 312, and the gas inlet 312 is in communication with the first recess 311; the flexible partition 33 covers the first recess 311, so that the flexible partition 33 and the first recess 311 jointly enclose a gas space 303 in communication with the gas inlet 312; the gas space 303 can be inflated and pressurized via the gas inlet 312, and the volume of the gas space 303 can change with the gas in the gas space 303 due to the flexibility of the flexible partition 33.

[0077] As shown, Figures 7 to 9 the valve body 34 is provided with a communication hole 341 and a first liquid port 342 in communication with the communication hole 341, the communication hole 341 penetrates the middle of the valve body 34, the flexible partition 33 covers one end of the communication hole 341, and the second cover 32 covers the other end of the communication hole 341; the second cover 32 is provided with a second recess 321 and a second liquid port 322 in communication with the second recess 321, and the second recess 321 is in communication with the communication hole 341 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 in sealing connection with the hole wall of the communication hole 341, and the second sealing portion 353 can block the communication between the second recess 321 and the communication hole 341; when the gas pressure in the gas space 303 rises to increase the volume of the gas space 303, the flexible partition 33 bulges towards 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 away from the communication between the second recess 321 and the communication hole 341, thereby realizing the communication between the first liquid port 342 and the second liquid port 322; in this embodiment, one of the first liquid port 342 and the second liquid port 322 is formed as a liquid inlet 301 of the control member 30, and the other of the first liquid port 342 and the second liquid port 322 is formed as a liquid outlet 302 of the control member 30.

[0078] Further, in this embodiment, as shown, Figure 8 and Figure 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, the valve core body is provided with a rod portion 352, the first sealing portion 351 and the second sealing portion 353 are arranged at both ends of the rod portion 352 in the length direction, the rod portion 352 is respectively formed with a first boss 3511 and a second boss 3531 protruding outward in the radial direction at both ends in the axial direction, the first boss 3511 and the first sealing ring 3513 form the first sealing portion 351, and the second boss 3531 and the second sealing ring 3533 form the second sealing portion 353.

[0079] Specifically, the circumferential side wall of the first boss 3511 is provided with a first recess 3512, the circumferential side wall of the second boss 3531 is provided with a second recess 3532, the first recess 3512 and the second recess 3532 are formed into an annular groove structure; the elastic member 354 can be a spring, 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 communication hole 341 is formed with a third boss 3411 extending inward, the third boss 3411 is formed into an annular plate structure, the rod portion 352 can slide in the ring of the third boss 3411, and the both ends of the elastic member 354 in the extension direction are respectively abutted against the first boss 3511 and the third boss 3411; when the flexible partition 33 is inflated towards the side close to the valve body 34 due to pressurization in the gas space 303, the first boss 3511 can be abutted against and pushed to move towards the direction close to the third boss 3411 to form extrusion to the elastic member 354, so that the second sealing portion 353 does not contact the communication between the second recess 321 and the communication hole 341, and the first liquid port 342 and the second liquid port 322 are communicated; when the gas space 303 is depressurized, the elastic member 354 is reset to push the first boss 3511 to move towards the direction away from the third boss 3411, so that the second sealing portion 353 blocks the communication between the second recess 321 and the communication hole 341, and the first liquid port 342 and the second liquid port 322 are blocked.

[0080] As shown in Figure 8 and Figure 9 , the first sealing ring 3513 is formed into an annular structure and arranged in the first recess 3512, part of the first sealing ring 3513 protrudes out of the first recess 3512 and abuts against the hole wall of the communication hole 341, so as to avoid the liquid between the first boss 3511 and the third boss 3411 to flow 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 arranged in the second recess 3532, part of the second sealing ring 3533 protrudes out of the second recess 3532 and abuts against the third boss 3411; when the second sealing portion 353 is separated from the communication, the second sealing ring 3533 moves towards the direction of extending into the second recess 321.

[0081] In the preferred embodiment, the outer surfaces of the first sealing ring 3513 and the second sealing ring 3533 are provided with a protective layer, which is preferably made of PTFE material, to have a certain corrosion resistance, prolong the service life of the control member 30, reduce the influence of the disinfectant on the corrosion of the first sealing ring 3513 and the second sealing ring 3533, and also ensure that the flexible partition 33 is not damaged. Thus, an additional line is added to reduce the risk of failure of the control member 30, to form a double protection with the anti-seepage assembly, thereby ensuring the airtightness between the first liquid port 342 and the second liquid port 322, further reducing the risk of external water source flowing into the disinfecting member 10 from the control member 30, 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 the present embodiment, as shown in Figure 1 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 in communication with the air inlet 11 on the disinfecting member 10, and the second branch 22 is in communication with the gas inlet 312 on the control member 30; the disinfectant anti-backwater system further comprises a first adjusting member 70 and a second adjusting member 80, the first adjusting member 70 is arranged downstream of the liquid outlet 302 of the control member 30, the first adjusting member 70 has a first liquid inlet portion 71, a second liquid inlet portion 72 and a liquid outlet portion 73, the first liquid inlet portion 71 is in communication with the liquid outlet 302, the second liquid inlet portion 72 is in communication with an external water source, which is usually tap water, and the liquid outlet portion 73 is in communication with a general pipeline on the dental chair. In this way, the liquid outlet portion 73 can be in communication with the first liquid inlet portion 71 to provide disinfectant for the general pipeline on the dental chair, or the liquid outlet portion 73 can be in communication with the second liquid inlet portion 72 to provide water source for the general pipeline on the dental chair. The first adjusting member 70 can be a water solenoid valve.

[0083] As shown in Figure 1 the second adjusting member 80 is arranged on the first branch 21, and the second adjusting member 80 can be a two-position two-way solenoid valve to control whether gas is added to the disinfecting member 10.

[0084] The disinfectant liquid anti-backflow system according to the application is provided with a permeation prevention assembly on the air inlet of the disinfecting member, and the buoyancy assembly can drive the blocking member to move towards the direction of approaching or moving away from the air inlet channel according to the liquid level change of the disinfectant liquid, so as to realize the blocking or releasing of the second end of the air inlet channel, thereby blocking the air inlet channel by the blocking member when the liquid level rises, and avoiding the overflow of the disinfectant liquid; the outer side of the first sealing ring and the second sealing ring on the control member is provided with a protective layer to delay the corrosion and failure of the control member by the disinfectant liquid; the first detection circuit and the second detection circuit are connected to the alarm system to establish an early warning, so that the liquid outside the disinfecting member cannot flow back into the disinfecting member and cannot overflow from the disinfecting member, and the stability of the disinfecting system and the overall pipeline of the dental chair is ensured.

[0085] The dental chair according to the application comprises the disinfectant liquid anti-backflow system as described above, and thus has all the beneficial effects of the disinfectant liquid anti-backflow system, which will not be described here again.

[0086] Finally, it should be noted that: the above-described embodiments are only specific embodiments of the present application, used to illustrate the technical solutions of the present application, and not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily think of changes to the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some technical features, within the technical scope disclosed by the present application. These modifications, changes or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be covered within 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 reverse water system for disinfectant solution, characterized by, The disinfectant liquid anti-backwater system comprises: a disinfecting member for containing disinfectant liquid, the disinfecting member being provided with an air inlet and a liquid outlet; an air inlet pipe in communication with the air inlet; a control member having a liquid inlet in communication with the liquid outlet and a liquid outlet in communication with a general pipeline of a dental chair; a seepage prevention assembly arranged at the air inlet, the seepage prevention assembly comprising an air inlet channel assembly and a buoyancy assembly arranged in sequence, the air inlet channel assembly comprising an air inlet assembly and a blocking member, the air inlet assembly being formed with an air inlet channel, the air inlet pipe being in communication with a first end of the air inlet channel, the blocking member being arranged at a second end of the air inlet channel, the buoyancy assembly being capable of driving the blocking member to move towards or away from the air inlet channel with the change of the liquid level of the disinfectant liquid, so as to achieve the blocking or releasing of the second end; the air inlet assembly comprising: a first channel member arranged at the air inlet, the first channel member being provided with a mounting hole, at least part of the blocking member being arranged in the mounting hole; a second channel member connected with the mounting hole and the air inlet pipe respectively, the second channel member being provided with the air inlet channel.

2. The disinfectant solution backflow prevention system of claim 1, wherein, the first channel member being provided with a first detection circuit and a second detection circuit leading into the mounting hole, the first detection circuit and the second detection circuit being arranged in a spaced manner, the disinfectant liquid entering the mounting hole being capable of conducting the first detection circuit and the second detection circuit.

3. The disinfectant solution backflow prevention system of claim 1, wherein, the buoyancy assembly comprising: a support member connected with the air inlet assembly, the support member being provided with a receiving cavity, the blocking member being arranged at the top of the receiving cavity, the support member being provided with a hollow portion in communication with the receiving cavity, so that the disinfectant liquid can enter the receiving cavity; a buoyancy member arranged in the receiving cavity, the disinfectant liquid in the receiving cavity being capable of lifting the buoyancy member, so that the buoyancy member drives the blocking member to move towards the air inlet channel, so as to achieve the blocking of the second end.

4. The reverse water system of claim 1, wherein, the disinfecting member being further provided with a liquid adding opening; the disinfectant liquid anti-backwater system further comprising: a cover assembly arranged at the liquid adding opening, the cover assembly comprising a cover body, a supporting member and a first sealing member, the supporting member being formed in an annular structure, and part of the supporting member extending into the liquid adding opening, the cover body being arranged on the supporting member, the cover body being formed with a sealing portion extending into the inside of the annular structure of the supporting member, a sealing groove being formed between the sealing portion and the inner wall of the supporting member, the first sealing member being embedded in the sealing groove.

5. The reverse flow prevention system for disinfectant solution according to claim 4, wherein the first sealing member being formed as a rotating body with a V-shaped cross section, the opening of the V shape facing the disinfectant liquid, and the two side walls of the opening being in abutment with the sealing portion and the supporting member respectively; when the disinfecting member is inflated and pressurized, the gas can enter the opening and extrude the two side walls outward.

6. The disinfectant solution backflow prevention system of claim 1, wherein, the control member comprising a first cover body, a second cover body, a flexible partition, a valve body and a valve core assembly, the flexible partition being arranged between the first cover body and the valve body, the first cover body being provided with a first recess and a gas inlet, the flexible partition covering the first recess, so as to form a gas space in communication with the gas inlet; The valve body is provided with a communication hole and a first liquid port in communication with the communication hole, one end of the communication hole is covered by the flexible partition, and the other end of the communication hole is covered by the second cover body; The second cover body is provided with a second groove and a second liquid port in communication with the second groove, the second groove and the communication hole are in communication to form a liquid space; The valve core assembly is arranged in the liquid space, the valve core assembly is formed with a first sealing part and a second sealing part, the first sealing part is in sealing connection with the hole wall of the communication hole, and the second sealing part can block the communication part of the second groove and the communication hole; When the gas pressure in the gas space is increased to increase the volume of the gas space, the flexible partition pushes the first sealing part to drive the second sealing part to be separated from the communication part, so that the first liquid port and the second liquid port are in communication; 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.

7. The disinfectant solution backflow prevention system of claim 6, wherein, The valve core assembly comprises: A valve core body, the two ends of the valve core body in the axial direction are respectively formed with a first boss and a second boss protruding outward in the radial direction, a first recess is arranged on the circumferential side wall of the first boss, and a second recess is arranged on the circumferential side wall of the second boss; An elastic member, the rod part of the elastic member is sleeved on the valve core body; the hole wall of the communication hole is formed with a third boss extending inward, and the two ends of the elastic member in the extension direction are respectively in abutment with the first boss and the third boss; A first sealing ring, the first sealing ring is arranged in the first recess, and part of the first sealing ring protrudes out of the first recess and is in abutment with the hole wall of the communication hole; A second sealing ring, the second sealing ring is arranged in the second recess, and part of the second sealing ring protrudes out of the second recess and is in abutment with the third boss; when the second sealing part is separated from the communication part, the second sealing ring moves towards the direction of extending into the second groove.

8. The reverse flow prevention system for disinfectant solution according to claim 6, wherein The output end of the air inlet pipe is formed with a first branch and a second branch, the first branch is in communication with the air inlet, and the second branch is in communication with the gas inlet; The disinfectant anti-backwater system further comprises: A first adjusting member, arranged downstream of the liquid outlet, the first adjusting member has a first liquid inlet part, a second liquid inlet part and a liquid outlet part, the first liquid inlet part is in communication with the liquid outlet, the second liquid inlet part is in communication with an external water source, and the liquid outlet part is in communication with the general pipeline; A second adjusting member, arranged on the first branch.

9. A dental chair, characterized by The disinfectant anti-backwater system comprises any one of claims 1 to 8. The disinfectant anti-backwater system comprises any one of claims 1 to 8.

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