Medical dental chair with dry water-gas separation device

Abstract

The present application provides a medical dental chair with a dry-type water-gas separation device, which relates to the technical field of medical dental chairs. A medical dental chair with a dry-type water-gas separation device comprises a dental chair, a side box provided on one side of the dental chair, a dry filter installed in the side box, a one-way valve provided at the outlet end of a negative pressure chamber, and a secondary negative pressure mechanism provided in the negative pressure chamber. The negative pressure device provides suction to the negative pressure chamber, generating suction at the strong and weak suction handsets, thereby sucking liquid in the patient's oral cavity into the dry filter. While providing suction to the negative pressure chamber, a certain negative pressure is also generated at the end of the negative pressure chamber away from the dry filter. When the external negative pressure device is deactivated, the one-way valve continues to generate suction in the direction of the filter chamber, and droplets containing pathogens remaining in the strong and weak suction handsets from the inlet of the filter chamber to continue to be sucked into the filter chamber, thereby preventing back-suction caused by the strong and weak suction handsets due to deactivation, causing droplets to flow back into the surrounding environment and increase the risk of cross-infection.

Description

Technical Field

[0001] The present application relates to the field of medical dental chairs, and in particular to a medical dental chair with a dry water-gas separation device. Background Art

[0002] Medical dental chairs are indispensable medical devices in dental surgery and oral disease examination and treatment. When working, medical dental chairs need to absorb and discharge the liquid in the mouth to the outside of the mouth. Therefore, the interior of the dental chair contains multiple sets of complex water pipes and related pneumatic pipes and water pipes. Long-term use is prone to residual liquid, which will breed bacteria or biofilm attached to the pipes, easily causing infection and endangering the health of patients and doctors.

[0003] Existing dental chairs mostly use negative pressure suction. Since the negative pressure suction pipeline is connected to the dental handpiece, after each use of the strong and weak suction handpieces, the gas containing the patient's oral pathogen droplets will be sucked back by the strong and weak suction handpieces and discharged into the overall environment of the clinic, increasing the risk of cross infection. Summary of the Invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a medical dental chair with a dry water-gas separation device, comprising a dental chair, a power switch for controlling strong and weak suction, a side box provided on one side of the dental chair, a mouthwash basin installed on the side box, a microswitch connected to one side of the mouthwash basin, a strong and weak suction handpiece clamped on the microswitch, a dry filter installed in the side box, one inlet end of the dry filter connected to the strong and weak suction handpiece, and the other inlet end of the dry filter connected to an external negative pressure device, and further comprising:

[0005] The top end of the dry filter is connected to a strong and weak suction pipe and a negative pressure pipe, and the bottom end of the dry filter is connected to a drain pipe, wherein the negative pressure pipe is externally connected to a negative pressure device;

[0006] The ends of the strong and weak suction pipes away from the dry filter are respectively connected to adapters, the adapters are connected to inlet pipes, and the inlet pipes are connected to the strong and weak suction handsets;

[0007] The adapter includes a negative pressure cabin and a filter cabin, the outlet end of the filter cabin is connected to the side wall of the negative pressure cabin, the inlet end of the filter cabin is connected to the inlet pipe, the outlet end of the negative pressure cabin is provided with a one-way valve, and a secondary negative pressure mechanism is provided in the negative pressure cabin;

[0008] The secondary negative pressure mechanism includes a stopper arranged in the negative pressure cabin, a guide rod is fixedly connected to the stopper, a sealing block is slidably sleeved on the guide rod, the sealing block and the negative pressure cabin are sealingly and slidingly matched, and a plug is slidably provided at the inlet end of the negative pressure cabin, and the plug can be elastically displaced at the inlet end of the negative pressure cabin under the influence of the sliding of the sealing block.

[0009] In addition, a medical dental chair with a dry water-gas separation device according to an embodiment of the present application also has the following additional technical features:

[0010] In some specific embodiments of the present application, the negative pressure chamber is provided with a detachable sealed configuration at one end away from the one-way valve.

[0011] In some specific embodiments of the present application, the flow direction of the one-way valve is from the negative pressure chamber to the strong and weak suction pipes.

[0012] In some specific embodiments of the present application, an air inlet nozzle is provided on the side wall of the negative pressure cabin, the outlet end of the filter cabin is connected to the air inlet nozzle, and the block is located on the side of the air inlet nozzle away from the one-way valve.

[0013] In some specific embodiments of the present application, a T-shaped groove is provided on a side of the air inlet nozzle away from the one-way valve.

[0014] In some specific embodiments of the present application, the stopper is hollowed out, wherein flanges are evenly arranged on the circumference of the side wall of the stopper.

[0015] In some specific embodiments of the present application, the plug and the inner wall of the negative pressure chamber are sealed and slidably matched, and the cross-section of the plug is larger than the cross-section of the outlet end of the air inlet nozzle.

[0016] In some specific embodiments of the present application, a connecting block is fixedly connected to one side of the plug, and the connecting block and the inner wall of the negative pressure chamber are sealed and slidably matched, wherein a T-shaped block is fixedly connected to the connecting block, and the T-shaped block and the T-shaped slot are limitedly slidably matched.

[0017] In some specific embodiments of the present application, a clamping block is fixed to the connecting block facing the sealing block, a baffle is fixed to the clamping block, a sliding rod is fixed to the baffle, the sliding rod slides through the baffle, and a first elastic member is sleeved on the portion of the sliding rod located between the baffle and the baffle.

[0018] In some specific embodiments of the present application, the displacement length of the baffle is consistent with the displacement length of the sealing block.

[0019] In some specific embodiments of the present application, a filtering mechanism is provided in the filter cabin, and the filtering mechanism includes an anti-blocking component and a filtering component. The anti-blocking component is fixed to the side of the inner wall of the filter cabin facing the outlet end, and the filtering component is slidably inserted into the filter cabin.

[0020] In some specific embodiments of the present application, the anti-blocking component includes a convex ring fixed to the inner wall of the filter chamber facing the outlet end, a bracket is fixed to the inner wall of the convex ring, and a blade is rotatably connected to the bracket.

[0021] In some specific embodiments of the present application, the filter element includes a filter screen that is slidably engaged with the inner wall of the filter chamber, a connecting rod fixedly connected to the filter screen, and a blocking piece fixedly connected to the other end of the connecting rod.

[0022] In some specific embodiments of the present application, one end of the blocking piece away from the filter screen abuts against a second elastic member.

[0023] In some specific embodiments of the present application, the inlet end of the filter cabin is located between the filter screen and the baffle, and the end of the filter cabin close to the baffle is detachably sealed.

[0024] In some specific embodiments of the present application, grooves are uniformly provided on the inner wall of the negative pressure chamber, and the grooves and the flanges are slidably fitted, wherein the recesses between adjacent flanges do not interfere with the inner wall of the negative pressure chamber, and the grooves extend to the end surface of the negative pressure chamber away from the end of the strong and weak suction pipes;

[0025] A third elastic member is sleeved on the guide rod, and the third elastic member is located between the stop block and the sealing block.

[0026] According to the embodiment of the present application, a medical dental chair with a dry water-gas separation device has the following beneficial effects: using an external negative pressure device to provide suction to the negative pressure chamber, so that suction is generated at the strong and weak suction handsets, and the liquid in the patient's mouth can be sucked into the dry filter for processing. While providing suction to the negative pressure chamber, the sealing block is blocked by the plug, so that the sealing block will be axially displaced along the guide rod under the action of pressure until the sealing block hits the plug and drives the plug out of the air inlet end of the negative pressure chamber. At this time, the dry filter and the strong and weak suction handsets are connected, and the negative pressure is A certain negative pressure will also be generated inside the end of the cabin away from the dry filter. When the external negative pressure equipment stops being used, under the action of the one-way valve, a seal is formed between the negative pressure cabin and the dry filter. The sealing block is reset along the guide rod under the action of the negative pressure at the end of the negative pressure cabin away from the dry filter. In this process, suction will continue to be generated in the direction of the filter cabin, and the droplets containing pathogens remaining in the strong and weak suction machines from the inlet of the filter cabin to the filter cabin can continue to be sucked into the filter cabin, avoiding back suction caused by the strong and weak suction machines being out of use, causing the droplets to flow back to the surrounding environment, increasing the risk of cross infection.

[0027] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the following is a brief introduction to the drawings required for use in the implementation methods. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 This is a schematic diagram of the overall structure of a medical dental chair with a dry water-gas separation device according to an embodiment of the present application;

[0030] Figure 2 This is a partial structural diagram of a medical dental chair with a dry water-gas separation device according to an embodiment of the present application;

[0031] Figure 3 is a schematic structural diagram of a dry filter and an adapter according to an embodiment of the present application;

[0032] Figure 4 is a schematic diagram of the internal structure of an adapter according to an embodiment of the present application;

[0033] Figure 5 is a structural exploded diagram of a secondary negative pressure mechanism according to an embodiment of the present application;

[0034] Figure 6 According to the embodiment of this application Figure 5 A magnified view of middle A;

[0035] Figure 7 is a partial structural diagram of a secondary negative pressure mechanism according to an embodiment of the present application;

[0036] Figure 8 is a structural diagram of a filtering mechanism according to an embodiment of the present application;

[0037] Figure 9 It is a structural exploded diagram of the filtering mechanism according to an embodiment of the present application.

[0038] Icons: 1. Dental chair; 2. Power switch; 3. Side box; 4. Mouthwash basin; 41. Micro switch; 5. Power and weak suction handpiece; 6. Dry filter; 61. Power and weak suction tube; 62. Drain pipe; 63. Negative pressure pipe; 7. Adapter; 71. Inlet pipe; 72. Negative pressure chamber; 721. One-way valve; 722. Inlet nozzle; 723. T-slot; 724. Groove; 73. Filter chamber; 8. Secondary negative pressure mechanism; 81. Stopper; 811. Convex Edge; 82, guide rod; 83, sealing block; 84, plug; 841, connecting block; 842, clamping block; 843, T-shaped block; 844, baffle; 845, sliding rod; 846, first elastic member; 85, third elastic member; 9, filtering mechanism; 91, anti-blocking member; 911, convex ring; 912, bracket; 913, paddle; 92, filtering member; 921, filter screen; 922, connecting rod; 923, baffle; 924, second elastic member. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0040] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0041] like Figures 1-9As shown, a medical dental chair with a dry water-gas separation device according to an embodiment of the present application comprises a dental chair 1, a power switch 2 for controlling strong and weak suction is provided on the dental chair 1, a side box 3 is provided on one side of the dental chair 1, a mouthwash pool 4 is installed on the side box 3, a micro switch 41 is connected to one side of the mouthwash pool 4, a strong and weak suction handpiece 5 is snapped onto the micro switch 41, a dry filter 6 is installed in the side box 3, one of the inlet ends of the dry filter 6 is connected to the strong and weak suction handpiece 5, and the other inlet end of the dry filter 6 is externally connected to a negative pressure device.

[0042] Specifically, a medical dental chair with a dry water-gas separation device according to an embodiment of the present application further comprises a dry filter 6, the top end of which is connected to a strong and weak suction pipe 61 and a negative pressure pipe 63, and the bottom end of the dry filter 6 is connected to a drain pipe 62, wherein the negative pressure pipe 63 is externally connected to a negative pressure device;

[0043] The ends of the strong and weak suction pipes 61 away from the dry filter 6 are respectively connected to the adapter 7, the adapter 7 is connected to the inlet pipe 71, and the inlet pipe 71 is connected to the strong and weak suction handset 5;

[0044] The adapter 7 includes a negative pressure chamber 72 and a filter chamber 73. The outlet of the filter chamber 73 is connected to the side wall of the negative pressure chamber 72, and the inlet of the filter chamber 73 is connected to the inlet pipe 71. A one-way valve 721 is provided at the outlet of the negative pressure chamber 72. A secondary negative pressure mechanism 8 is provided in the negative pressure chamber 72.

[0045] The secondary negative pressure mechanism 8 includes a stopper 81 arranged in the negative pressure cabin 72, a guide rod 82 is fixedly connected to the stopper 81, a sealing block 83 is slidably sleeved on the guide rod 82, the sealing block 83 and the negative pressure cabin 72 are sealingly and slidingly matched, and a plug 84 is slidingly provided at the inlet end of the negative pressure cabin 72, and the plug 84 can be elastically displaced at the inlet end of the negative pressure cabin 72 under the influence of the sliding of the sealing block 83.

[0046] It should be noted that in the embodiment of the present application, the power switch 2 is used to control the on and off of the power supply of the strong and weak suction handpieces 5, and to control the start and stop of the external negative pressure equipment. The function of the microswitch 41 is that when the doctor picks up the strong and weak suction handpieces 5, the microswitch 41 is turned on, the strong and weak suction handpieces 5 work, and the dry filter 6 provides suction to the strong and weak suction handpieces 5 through the external negative pressure equipment and pipelines to suck in the liquid in the patient's mouth. When the liquid in the dry filter 6 is at a high liquid level, the sewage is directly discharged into the sewer through the drain pipe 62, thereby blocking the sewage from causing secondary pollution to the clinic environment and reducing the risk of cross infection.

[0047] Specifically, the dry filter 6 is a prior art and will not be described in detail in the embodiments of the present application.

[0048] It should be further explained that in the embodiment of the present application, the negative pressure tube 63 adopts a hose with a metal steel wire. When working, negative pressure is generated in the tube, which is used to suck the mixed liquid in the oral cavity. The use of the steel wire hose ensures that when negative pressure is generated in the tube, no deformation occurs, thereby ensuring stable suction intensity.

[0049] The filter cabin 73 is used to filter the liquid adsorbed by the strong and weak suction devices 5 and entering the pipeline to prevent impurities in the liquid from clogging the suction pipeline.

[0050] In addition, a medical dental chair with a dry water-gas separation device according to an embodiment of the present application also has the following additional technical features:

[0051] like Figure 4-Figure 5 As shown, the negative pressure chamber 72 is provided with a detachable sealed configuration at one end away from the one-way valve 721, so as to facilitate cleaning and disinfection of the interior of the negative pressure chamber 72 during daily use, and to avoid the growth of bacteria inside due to long-term residues.

[0052] Furthermore, the flow direction of the one-way valve 721 is from the negative pressure chamber 72 to the strong and weak suction pipes 61, so as to control the flow direction inside the negative pressure chamber 72.

[0053] Among them, such as Figure 4 and Figure 5 As shown, an air inlet nozzle 722 is provided on the side wall of the negative pressure cabin 72 , the outlet end of the filter cabin 73 is connected to the air inlet nozzle 722 , and the block 81 is located on the side of the air inlet nozzle 722 away from the one-way valve 721 .

[0054] Furthermore, a T-shaped groove 723 is provided on a side of the air inlet nozzle 722 away from the one-way valve 721 .

[0055] Furthermore, the block 81 is hollowed out, wherein flanges 811 are evenly arranged on the circumference of the side wall of the block 81. The hollowed-out block 81 can avoid affecting the on-off function inside the entire negative pressure chamber 72, and ensure that the sealing block 83 can be displaced by negative pressure.

[0056] Furthermore, the plug 84 and the inner wall of the negative pressure chamber 72 are sealed and slidably matched, and the cross-section of the plug 84 is larger than the cross-section of the outlet end of the air inlet nozzle 722, ensuring that the plug 84 can seal the air inlet nozzle 722.

[0057] Furthermore, a connecting block 841 is fixedly connected to one side of the plug 84, and the connecting block 841 and the inner wall of the negative pressure chamber 72 are sealed and slidably matched, wherein a T-shaped block 843 is fixedly connected to the connecting block 841, and the T-shaped block 843 and the T-shaped slot 723 are limited and slidably matched, so that the plug 84 can slide in a directional manner on the inner wall of the negative pressure chamber 72.

[0058] Furthermore, a clamping block 842 is fixedly connected to the connecting block 841 on the side facing the sealing block 83, a baffle 844 is fixedly connected to the clamping block 842, a slide rod 845 is fixedly connected to the baffle 844, the slide rod 845 slides through the block 81, and the portion of the slide rod 845 located between the block 81 and the baffle 844 is sleeved with a first elastic member 846. The presence of the first elastic member 846 enables the plug 84 to have the ability to reset. It should be noted that, in the initial state, the plug 84 and the air inlet nozzle 722 are in a sealed state.

[0059] Furthermore, the displacement length of the baffle 844 is consistent with the displacement length of the sealing block 83, ensuring that the sealing block 83 and the plug 84 are displaced at the same time.

[0060] The following describes the use process of a medical dental chair with a dry water-gas separation device according to an embodiment of the present application with reference to the accompanying drawings:

[0061] When in use, suction is provided to the negative pressure chamber 72 through the external negative pressure device. At this time, due to the seal formed between the plug 84 and the air inlet nozzle 722, the suction force on the side of the negative pressure chamber 72 close to the one-way valve 721 increases. Under the action of the suction force, the sealing block 83 is forced to move along the guide rod 82 toward the stopper 81. The displacement length of the baffle 844 is consistent with the displacement length of the sealing block 83, so the sealing block 83 will directly drive the baffle 844 to move, that is, drive the plug 84 to move along the T-shaped groove 723. At this time, the sealing state between the plug 84 and the air inlet nozzle 722 is released, and a connecting path is formed between the dry filter 6 and the strong and weak suction handpiece 5. The strong and weak suction handpiece 5 can complete the suction of the liquid in the patient's mouth and transmit it to the dry filter 6 for treatment by the dry filter 6, and the liquid containing pathogens is discharged into the sewer through the drain pipe 62. When the treatment in the patient's mouth is completed, the strong and weak suction handpiece 5 is connected to the micro switch 4 1, the strong and weak suction handpieces 5 are deactivated, and the external negative pressure device is turned off. Under the action of the one-way valve 721, the negative pressure chamber 72 cannot suck back from the dry filter 6. In the negative pressure chamber 72, at the end away from the one-way valve 721, the seal block 83 moves toward the stopper 81, causing a new negative pressure to be generated in the cavity there. After the external negative pressure stops, the negative pressure chamber 72 and the filter chamber 73 are now connected. Therefore, under the action of this negative pressure, the seal block 83 is forced to return to its original position, thereby generating new suction in the filter chamber 73 until the plug 84 is sealed again with the air inlet nozzle 722. This suction will cause the droplets containing pathogens remaining in the inlet pipe 71 and the strong and weak suction handpieces 5 to be sucked into the filter chamber 73 and the negative pressure chamber 72, thereby avoiding backflow caused by the deactivation of the strong and weak suction handpieces 5, which would cause the droplets containing pathogens to spread into the treatment space and increase the risk of cross infection.

[0062] In the related art, when a medical dental chair with a dry water-gas separation device sucks the liquid in the patient's mouth, it is inevitable that the foreign matter and the liquid will be sucked toward the dry filter 6 due to the foreign matter in the patient's mouth. If the foreign matter is not handled, it may cause the pipeline between the strong and weak suction handset 5 and the dry filter 6 to be blocked, affecting the normal use of the medical dental chair.

[0063] According to some embodiments of the present application, Figure 8-Figure 9 As shown, a filter mechanism 9 is provided in the filter chamber 73 , and the filter mechanism 9 includes an anti-blocking member 91 and a filter member 92 . The anti-blocking member 91 is fixed to the inner wall of the filter chamber 73 on the side facing the outlet end, and the filter member 92 is slidably inserted into the filter chamber 73 .

[0064] Specifically, the anti-blocking component 91 includes a convex ring 911 fixed to the inner wall of the filter chamber 73 toward the outlet end, a bracket 912 is fixed to the inner wall of the convex ring 911, and a paddle 913 is rotatably connected to the bracket 912. It can be understood that when suction is provided in the direction of the negative pressure chamber 72, the paddle 913 will rotate under the action of the suction (airflow).

[0065] The filter element 92 includes a filter screen 921 that is slidably fitted with the inner wall of the filter chamber 73 , a connecting rod 922 fixedly connected to the filter screen 921 , and a blocking piece 923 fixedly connected to the other end of the connecting rod 922 .

[0066] It should be noted that the blades 913 and the filter screen 921 are in contact with each other.

[0067] Furthermore, one end of the blocking piece 923 away from the filter 921 abuts against a second elastic member 924 , which enables abutment between the filter 921 and the convex ring 911 , thereby enhancing the cleaning effect provided by the blade 913 on the filter 921 when it rotates.

[0068] Furthermore, the inlet end of the filter cabin 73 is located between the filter screen 921 and the baffle 923, and the end of the filter cabin 73 close to the baffle 923 is detachably sealed, which facilitates the disassembly and cleaning of the interior of the filter cabin 73.

[0069] Therefore, during actual use, the liquid and foreign matter mixed therein transported into the filter chamber 73 by suction will be filtered by the filter screen 921, and the foreign matter will be blocked between the filter screen 921 and the baffle 923. The liquid continues to be transported into the dry filter 6. Under the action of the second elastic member 924, abutment is formed between the filter screen 921 and the convex ring 911, and under the action of negative pressure suction, the paddle 913 rotates. The rotating paddle 913 will clean the foreign matter adhered to the filter screen 921 to a certain extent, preventing the foreign matter from clogging the filter screen 921 and affecting the liquid transportation. The end of the filter chamber 73 close to the baffle 923 is in a detachable sealed arrangement, so that the filter screen 921 in the filter chamber 73 can be taken out for cleaning and disinfection.

[0070] In the related art, during the use of a medical dental chair with a dry water-gas separation device, it is inevitable that smaller foreign matter will pass through the filter 921 and enter the negative pressure chamber 72. The foreign matter entering the negative pressure chamber 72 may be adsorbed to the side of the block 81 away from the one-way valve 721 during the secondary negative pressure, causing adhesion to the guide rod 82, affecting the normal sliding between the sealing block 83 and the guide rod 82, and also causing adhesion to the first elastic member 846, affecting the normal elastic expansion and contraction of the first elastic member 846. Therefore, it will have a certain impact on the suction force provided by the secondary negative pressure.

[0071] According to some embodiments of the present application, Figure 4 and Figure 5 As shown, grooves 724 are evenly arranged on the circumference of the inner wall of the negative pressure cabin 72, and the grooves 724 and the flanges 811 are slidably matched to limit the block 81 and enable the block 81 to be slidably inserted in the negative pressure cabin 72, wherein the depressions between adjacent flanges 811 do not conflict with the inner wall of the negative pressure cabin 72, so that the liquid in the space between the block 81 and the sealing block 83 can flow back toward the one-way valve 721, and the grooves 724 extend to the end face of the negative pressure cabin 72 away from the end of the strong and weak suction pipes 61, so that the block 81 can be removed from the negative pressure cabin 72.

[0072] Furthermore, a third elastic member 85 is sleeved on the guide rod 82 . The third elastic member 85 is located between the stop block 81 and the sealing block 83 , and provides a certain restoring elastic force to the sealing block 83 , thereby promoting the restoration of the sealing block 83 .

[0073] Therefore, during actual use, when the sealing block 83 is reset from the direction of the stopper 81, the elastic force provided by the third elastic member 85 can enhance the reset ability of the sealing block 83 and improve the reset speed of the sealing block 83, that is, increase the suction force provided by the secondary negative pressure in the direction of the filter cabin 73 (it can be understood that when the sealing block 83 is slowly reset, the suction force generated at the inlet end of the filter cabin 73 is not as large as the suction force generated when it is quickly reset), and reduce the adhesion of foreign matter entering the negative pressure cabin 72 to the guide rod 82, affecting the normal sliding between the sealing block 83 and the guide rod 82, and reduce the adhesion of foreign matter to the first elastic member 846, affecting the normal elastic expansion and contraction ability of the first elastic member 846. At the same time, the sliding cooperation between the stopper 81 and the groove 724 in the negative pressure cabin 72 makes the stopper 81 detachable, which is convenient for cleaning and disinfecting the negative pressure cabin 72, the stopper 81, the guide rod 82, the sealing block 83 and other related accessories, further reducing the residual foreign matter in the pipeline to produce bacteria and increase the risk of cross infection.

[0074] It should be noted that the specific models and specifications of the dental chair 1, power switch 2, mouthwash basin 4, micro switch 41, strong and weak suction handpiece 5, dry filter 6, one-way valve 721, first elastic member 846, third elastic member 85, paddle 913 and second elastic member 924 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0075] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A medical dental chair with a dry water-gas separation device, comprising a dental chair (1), wherein a power switch (2) for controlling strong and weak suction is provided on the dental chair (1), a side box (3) is provided on one side of the dental chair (1), a mouthwash pool (4) is installed on the side box (3), a micro switch (41) is connected to one side of the mouthwash pool (4), a strong and weak suction handpiece (5) is clamped on the micro switch (41), a dry filter (6) is installed in the side box (3), one inlet end of the dry filter (6) is connected to the strong and weak suction handpiece (5), and the other inlet end of the dry filter (6) is externally connected to a negative pressure device, characterized in that: The top end of the dry filter (6) is connected to a strong and weak suction pipe (61) and a negative pressure pipe (63), and the bottom end of the dry filter (6) is connected to a drain pipe (62), wherein the negative pressure pipe (63) is externally connected to a negative pressure device; One end of the strong and weak suction pipe (61) away from the dry filter (6) is connected to an adapter (7), the adapter (7) is connected to an inlet pipe (71), and the inlet pipe (71) is connected to the strong and weak suction machine (5); The adapter (7) comprises a negative pressure cabin (72) and a filter cabin (73); the outlet end of the filter cabin (73) is connected to the side wall of the negative pressure cabin (72); the inlet end of the filter cabin (73) is connected to the inlet pipe (71); a one-way valve (721) is provided at the outlet end of the negative pressure cabin (72); and a secondary negative pressure mechanism (8) is provided in the negative pressure cabin (72); The secondary negative pressure mechanism (8) includes a stopper (81) disposed in the negative pressure chamber (72), a guide rod (82) fixedly connected to the stopper (81), a sealing block (83) slidably sleeved on the guide rod (82), the sealing block (83) and the negative pressure chamber (72) sealingly and slidingly cooperate, a plug (84) slidably disposed at the inlet end of the negative pressure chamber (72), and the plug (84) is elastically displaceable at the inlet end of the negative pressure chamber (72) under the influence of the sliding of the sealing block (83); An air inlet nozzle (722) is provided on the side wall of the negative pressure cabin (72), the outlet end of the filter cabin (73) is in communication with the air inlet nozzle (722), and the stopper (81) is located on a side of the air inlet nozzle (722) away from the one-way valve (721); In the initial state, the plug (84) and the air inlet nozzle (722) are in a sealed state, and suction is provided to the negative pressure chamber (72) by an external negative pressure device, so that the sealing block (83) moves along the guide rod (82) toward the stopper (81), and the sealed state between the plug (84) and the air inlet nozzle 722 is released; The external negative pressure device is turned off, and under the negative pressure of the cavity formed by the sealing block (83) and the negative pressure chamber (72), the sealing block (83) is forced to reset, thereby creating a new suction force in the filter chamber (73) until a sealing state is formed between the plug (84) and the air inlet nozzle (722) again.

2. The medical dental chair with a dry water-gas separation device according to claim 1, characterized in that: The negative pressure cabin (72) is provided in a detachable sealed manner at one end away from the one-way valve (721).

3. The medical dental chair with a dry water-gas separation device according to claim 1, characterized in that: The flow direction of the one-way valve (721) is from the negative pressure chamber (72) to the strong and weak suction pipes (61).

4. The medical dental chair with a dry water-gas separation device according to claim 1, characterized in that: A T-shaped groove (723) is provided on a side of the air inlet nozzle (722) away from the one-way valve (721).

5. The medical dental chair with a dry water-gas separation device according to claim 4, characterized in that: The stopper (81) is hollowed out, wherein flanges (811) are evenly arranged around the circumference of the side wall of the stopper (81).

6. The medical dental chair with a dry water-gas separation device according to claim 1, characterized in that: The plug (84) and the inner wall of the negative pressure chamber (72) are sealingly slidably matched, and the cross-section of the plug (84) is larger than the cross-section of the outlet end of the air inlet nozzle (722).

7. The medical dental chair with a dry water-gas separation device according to claim 5, characterized in that: A connecting block (841) is fixedly connected to one side of the plug (84), and the connecting block (841) and the inner wall of the negative pressure chamber (72) are in sealing and sliding engagement, wherein a T-shaped block (843) is fixedly connected to the connecting block (841), and the T-shaped block (843) and the T-shaped groove (723) are in position-limiting and sliding engagement.

8. The medical dental chair with a dry water-gas separation device according to claim 7, characterized in that: A clamping block (842) is fixedly connected to the connecting block (841) on the side facing the sealing block (83), a baffle (844) is fixedly connected to the clamping block (842), a sliding rod (845) is fixedly connected to the baffle (844), the sliding rod (845) slides through the baffle (81), and a first elastic member (846) is sleeved on the portion of the sliding rod (845) located between the baffle (81) and the baffle (844).

9. The medical dental chair with a dry water-gas separation device according to claim 8, characterized in that: The displacement length of the baffle (844) is consistent with the displacement length of the sealing block (83).

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