Oral care device with built-in miniature negative pressure pump and pH monitoring waste liquid bag

Abstract

The invention discloses an oral care device with a built-in miniature negative pressure pump and a pH monitoring waste liquid bag, and relates to the technical field of oral care. A negative pressure aspirator and a fluid pumping device are integrated in the main machine; the collecting bag comprises an exhaust pipe arranged at the top of the collecting bag and a waste liquid pipe penetrating to the bottom of the collecting bag; the inside of the flushing part is divided into a flushing cavity and a suction cavity which are mutually independent, the suction cavity is communicated with a waste liquid pipe of the collecting bag through a hose, and the flushing cavity is communicated with a liquid outlet of a fluid pumping device of the main machine through a hose; the negative pressure source and the flushing pump are integrated on the host, so that the dependence on a fixed negative pressure pipeline is avoided; meanwhile, an independent flushing cavity and an independent suction cavity are formed in the flushing part, flushing and suction are supported at the same time, and the cleaning efficiency and the comfort level of the patient are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oral care, in particular to an oral care device with a built-in micro negative pressure pump and a pH monitoring waste liquid bag. BACKGROUND

[0002] In clinical nursing practice, oral hygiene maintenance and respiratory secretion removal for critically ill patients and patients with limited self-care ability are two routine and important basic nursing contents. Currently, oral cleaning and sputum suction operations are completed by mutually independent instruments. Nursing staff need to repeatedly change instruments according to different operation purposes, which not only increases the overall length and operation complexity of single nursing, but also may cause mucosal irritation and affect the subjective comfort of patients due to multiple insertion and removal of instruments in the patient's mouth.

[0003] In addition, when using a conventional oral care appliance for flushing, the liquid injected into the patient's mouth often cannot be timely and effectively removed. This part of the liquid will temporarily accumulate in the low-lying part of the oral cavity, which not only may cause the patient's defensive reflexes such as coughing and nausea, resulting in an adverse experience, but also hides the clinical risk of liquid aspiration into the lungs. At the same time, the remaining liquid may also dilute the cleaning effect and become a medium for bacterial breeding, thereby weakening the final effectiveness of oral care to a certain extent. SUMMARY

[0004] Therefore, the technical problem to be solved by the present application is that the separation of existing oral care and sputum suction operations leads to cumbersome operation and low efficiency of medical staff.

[0005] The above technical problem is solved by the following technical scheme: the present application provides an oral care device with a built-in micro negative pressure pump and a pH monitoring waste liquid bag, which comprises a host and a collection bag. The host is internally integrated with a negative pressure aspirator and a fluid pump; The collection bag comprises an exhaust pipe arranged at the top position thereof, and a waste liquid pipe penetrating through the bottom thereof; The flushing member is internally divided into a flushing cavity and a suction cavity, the suction cavity is connected in communication with the waste liquid pipe of the collection bag through a hose, and the flushing cavity is connected in communication with the liquid outlet of the fluid pump of the host through a hose; The negative pressure inside the collection bag is formed by the running negative pressure aspirator, so as to force the oral mucus to enter the collection bag through the suction cavity of the flushing member.

[0006] In a preferred embodiment of the oral care device with a built-in micro negative pressure pump and a pH monitoring waste liquid bag according to the present application: the exhaust pipe is connected with the exhaust end of the negative pressure aspirator inside the host through a hose. The exhaust pipe bottom outlet is located at the top of the collection bag, and the waste liquid pipe bottom outlet is located at the bottom of the collection bag.

[0007] In a preferred embodiment of the oral care device with a built-in micro negative pressure pump and a pH monitoring waste liquid bag, the flushing member comprises an internally hollow brush head, a brush handle in communication with the internal suction cavity of the brush head, and a catheter in communication with the internal flushing cavity of the brush head. The catheter is arranged inside the brush handle.

[0008] In a preferred embodiment of the oral care device with a built-in micro negative pressure pump and a pH monitoring waste liquid bag, the side wall of the brush head is provided with a suction port in communication with the suction cavity. The end of the brush head away from the brush handle is provided with a flushing port in communication with the flushing cavity.

[0009] In a preferred embodiment of the oral care device with a built-in micro negative pressure pump and a pH monitoring waste liquid bag, further comprising, An operation handle is connected to the main machine through a wireless communication module. The operation handle is provided with a flushing pipeline, and the two ends of the flushing pipeline are connected to the catheter and the water outlet of the fluid pump, respectively. The operation handle is detachably connected to the brush handle.

[0010] In a preferred embodiment of the oral care device with a built-in micro negative pressure pump and a pH monitoring waste liquid bag, the material of the collection bag is transparent medical polyethylene plastic. The inner wall of the collection bag is fixedly provided with a pH test paper, and the outer wall of the collection bag is printed with a colorimetric card matched with the pH test paper.

[0011] In a preferred embodiment of the oral care device with a built-in micro negative pressure pump and a pH monitoring waste liquid bag, further comprising, An anti-overflow unit comprises a Venturi tube in communication with the exhaust pipe, and a gas bag arranged inside the Venturi tube for blocking the passage thereof. The Venturi tube comprises an outlet section connected to the exhaust pipe, a throat section located at the middle position, and an inlet section connected to the throat section away from the outlet section.

[0012] In a preferred embodiment of the oral care device with a built-in micro negative pressure pump and a pH monitoring waste liquid bag, the side wall of the gas bag is provided with a gas guide tube penetrating into the interior thereof. The side wall of the throat section is provided with a first circular hole, and the gas guide tube penetrates through the first circular hole and extends to the outside thereof. The air guide pipe is internally provided with a one-way valve; The air bag is located inside the throat pipe section; The air bag is internally provided with a balance pipe in communication therewith, the balance pipe penetrates the Venturi pipe and extends to the outside thereof.

[0013] In a preferred embodiment of the oral care device with the built-in micro negative pressure pump and the pH monitoring waste liquid bag, the projection of the bottom end opening of the balance pipe in the vertical direction is located below the vertical projection of the bottom wall of the inner cavity of the Venturi pipe. Wherein, the airflow flowing through the Venturi pipe causes the pressure in the throat pipe section to decrease, and the air bag is in communication with the balance pipe and the outside through the air guide pipe, and the pressure in the air bag is balanced.

[0014] In a preferred embodiment of the oral care device with the built-in micro negative pressure pump and the pH monitoring waste liquid bag, the one-way valve flows from the outside of the Venturi pipe to the inside of the air bag. Wherein, when the bottom of the balance pipe is blocked by oral mucus, the air bag is in communication with the outside through the air guide pipe; the airflow flowing through the inner cavity of the Venturi pipe generates negative pressure in the inner cavity, drives external air to flow into the air bag through the one-way valve, and makes the air bag expand.

[0015] The beneficial effects of the present application are as follows: the negative pressure source and the flushing pump are integrated in the main machine, which breaks the dependence on fixed negative pressure pipelines; at the same time, the independent flushing cavity and suction cavity in the flushing piece support flushing and suction at the same time, which significantly improves the cleaning efficiency and patient comfort; the pH test paper is fixed on the inner wall of the transparent collection bag, which, in combination with the colorimetric card on the outer wall, enables the nursing staff to monitor the pH value of the patient's saliva and evaluate the patient's oral health status while collecting waste liquid. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments of the present application will be briefly introduced below; obviously, the drawings described below only relate to some embodiments of the present application, but not limit the present application.

[0017] Figure 1 An assembled structure schematic diagram of the oral care device is shown; Figure 2 A connection structure schematic diagram of the flushing piece and the operation handle is shown; Figure 3 A structure schematic diagram of the flushing piece is shown; Figure 4 A cross-sectional view of A-A of Figure 3 is shown; Figure 5 A perspective structure schematic diagram of the collection bag is shown; Figure 6 The collecting bag and the anti-overflow unit connection structure schematic diagram is shown; Figure 7 The anti-overflow unit structure schematic diagram is shown; Figure 8 The air bag and the Venturi connection structure schematic diagram is shown; Figure 9 The balance pipe bottom plugging state schematic diagram is shown. DETAILED DESCRIPTION

[0018] In order for those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with specific embodiments and drawings.

[0019] The terms used in the present application are those general terms currently widely used in the art in consideration of the functions about the present application, but the terms can be changed according to the intention of those skilled in the art, precedents, or new technologies in the art. In addition, specific terms can be selected by the applicant, and in this case, the detailed meaning thereof will be described in the detailed description of the present application. Therefore, the terms used in the specification should not be understood as simple names, but based on the meaning of the terms and the overall description of the present application.

[0020] REFERENCE Figures 1-3 The present embodiment provides an oral care device with a built-in micro negative pressure pump and a pH monitoring waste liquid bag, comprising a host 1 and a collecting bag 2; the host 1 is internally integrated with a negative pressure aspirator and a fluid pump.

[0021] It should be noted that the negative pressure aspirator is a micro oil-free lubrication vacuum pump, which has high pumping speed and no oil mist pollution, can provide a stable negative pressure source, and the pump body does not need daily maintenance; the fluid pump is a micro diaphragm pump, which is used to transport the flushing liquid; the host panel is provided with a power switch, a negative pressure adjusting knob and a working state indicator The collecting bag 2 comprises an exhaust pipe 21 arranged at the top position thereof and a waste liquid pipe 22 penetrating to the bottom thereof; the flushing member 3 is internally divided into independent flushing cavities and suction cavities, the suction cavity is communicated with the waste liquid pipe 22 of the collecting bag 2 through a hose, and the flushing cavity is communicated with the liquid outlet of the fluid pump of the host 1 through a hose.

[0022] The collecting bag 2 is transparent and made of rubber material, and the collecting bag 2 and the host 1 are detachably connected through a hose, and the collecting bag 2 and the flushing member 3 are also connected through a hose, and the two ends of the hose are detachably connected with the collecting bag 2 and the flushing member 3, respectively.

[0023] Specifically, the flushing member 3 and the collection bag 2 and the hose for connecting the collection bag 2 and the flushing member 3 are all disposable products, which can be directly discarded after use; such design not only effectively avoids the risk of cross infection, but also greatly simplifies the cleaning and maintenance process of the equipment.

[0024] The inside of the collection bag 2 forms a negative pressure by the running negative pressure aspirator, forcing the oral mucus to enter the collection bag 2 through the suction cavity of the flushing member 3.

[0025] After confirming that the exhaust pipe and the waste liquid pipe of the collection bag are reliably connected with the negative pressure aspirator of the main machine and the suction cavity of the flushing member respectively, and the flushing liquid is poured into the main machine, first, the negative pressure aspirator is started, so that a stable negative pressure is formed in the sealed collection bag, and the negative pressure reaches the suction port of the flushing member through the pipeline and is in a standby state; then the operation in the oral cavity is carried out: when the brush head is put into the oral cavity of the patient, the side wall suction port continuously sucks the secretions such as saliva and sputum in the oral cavity under the action of the negative pressure, and these waste liquids are finally stored in the collection bag through the suction cavity and the connecting hose; when flushing is needed, the fluid pump is started at the same time of continuous suction, and the flushing liquid is sprayed out from the flushing port at the end of the brush head through the independent pipeline, so as to clean the teeth and gums, and the waste liquid after flushing is sucked away by the suction system working synchronously, so as to realize "flushing and suction at the same time"; when the operation is finished, the flushing liquid delivery is stopped first, the suction operation is kept for about 10-15 seconds to completely remove the residual liquid in the oral cavity, and then the machine is turned off.

[0026] Referring to Figures 1-8 As an optional embodiment, the exhaust pipe 21 is connected with the exhaust end of the negative pressure aspirator in the main machine 1 through a hose; the bottom outlet of the exhaust pipe 21 is located at the top of the collection bag 2, and the bottom outlet of the waste liquid pipe 22 is located at the bottom of the collection bag 2.

[0027] It should be noted that the top of the collection bag 2 is provided with the exhaust pipe 21, which is connected with the exhaust end of the negative pressure aspirator in the main machine 1 through a first hose; and the bottom of the collection bag 2 is provided with the waste liquid pipe 22, which is in communication with the suction cavity of the flushing member 3 through a second hose.

[0028] The bottom outlet of the exhaust pipe 21 is located at the top cavity of the collection bag 2, for exhausting gas; and the bottom outlet of the waste liquid pipe 22 extends to the bottom of the collection bag 2, for pouring waste liquid. Such high-low difference design makes the liquid accumulate at the bottom of the bag due to gravity, and the gas is located at the top of the bag and is extracted through the exhaust pipe 21.

[0029] Specifically, when the negative pressure aspirator is running, a stable negative pressure is mainly formed in the top cavity of the collection bag 2, which effectively avoids the waste liquid such as oral mucus from being directly sucked into the negative pressure aspirator in the main machine 1, thereby significantly reducing the risk of blockage of the pipeline of the main machine and cross contamination.

[0030] Further, the flushing member 3 comprises a brush head 31 which is internally hollow, a brush handle 32 which is in communication with the internal suction cavity of the brush head 31, and a conduit 33 which is in communication with the internal flushing cavity of the brush head 31; the conduit 33 is arranged in the internal cavity of the brush handle 32.

[0031] It should be noted that the brush head 31 is internally hollow, and is divided into two completely independent and physically isolated cavities, i.e. the flushing cavity and the suction cavity, by a partition plate arranged along the length direction of the brush head 31; such a double-cavity isolation design effectively avoids the cross-mixing of fluids.

[0032] At the end of the brush head 31 which is away from the brush handle 32, a flushing port 312 which is in communication with the flushing cavity is arranged; at the side wall of the brush head 31, a suction port 311 which is in communication with the suction cavity is arranged.

[0033] The brush handle 32 is internally hollow, and its internal cavity is in direct communication with the internal suction cavity 31b of the brush head 31, so as to jointly form a waste liquid suction channel from the suction port 311 to the tail end of the brush handle 32; the tail end of the brush handle 32 is connected with the waste liquid pipe 22 of the collection bag 2 through a hose.

[0034] The conduit 33 is arranged in the internal cavity of the brush handle 32, but has no communication relationship with the inner wall of the brush handle 32; the front end of the conduit 33 extends through the brush handle 32, and is in sealed connection and communication with the internal flushing cavity of the brush head 31; the rear end of the conduit 33 extends to the outside of the brush handle 32, and is connected with the liquid outlet of the fluid pump of the main machine 1 through a hose.

[0035] Specifically, the flushing port 312 at the end of the brush head 31 is specifically designed as a circular micropore array structure; these micropores are all in communication with the internal flushing cavity 31a of the brush head.

[0036] The suction port 311 on the side wall of the brush head 31 is a rectangular flat structure; the suction port 311 is arranged with an outwardly expanding inclined guide surface from the internal cavity of the brush head 31 to the outside of the brush head 31; the inclined guide surface can be understood as a guide structure which is chamfered or beveled at the edge of the rectangular opening.

[0037] When the device is working, the fluid pump of the main machine 1 pumps out the flushing liquid, and the path of the flushing liquid is: the conduit 33-the flushing cavity of the brush head 31-the flushing port 312, and the flushing liquid is finally sprayed to the oral cavity cleaning site; at the same time, the negative pressure generator of the main machine 1 generates negative pressure in the collection bag 2, and the negative pressure is transmitted to: the internal cavity of the brush handle 32-the suction cavity 31b of the brush head 31-the suction port 311 through the pipeline, so as to rapidly suck away the saliva in the oral cavity, the waste liquid after flushing, etc.

[0038] Furthermore, the side wall of the brush head 31 is provided with a suction port 311, which is connected to the suction chamber; the end of the brush head 31 away from the brush handle 32 is provided with a rinsing port 312, which is connected to the rinsing chamber.

[0039] The suction port 311 is located on the side wall of the brush head 31, and its shape is preferably rectangular and flat. The suction port 311 is directly connected to the suction chamber inside the brush head; the suction chamber extends backward and is seamlessly connected to the inner cavity of the brush handle 32, and the tail end of the brush handle 32 is finally connected to the waste liquid pipe 22 of the negative pressure suction device and the collection bag 2 through a flexible tube; in addition, the suction port 311 has an outwardly expanding inclined guide surface extending from the inner cavity of the brush head 31 to the outside of the brush head 31.

[0040] The rinsing port 312 is located at the end of the brush head 31 away from the brush handle 32. Its structure is preferably a circular micro-pore array, that is, a series of precision circular holes with a diameter between 0.5 mm and 1 mm arranged in a certain pattern. These rinsing ports 312 are directly connected to the rinsing chamber 31a inside the brush head. The rinsing chamber is connected to the fluid pump outlet of the main unit 1 through a conduit 33 that passes through the cavity inside the brush handle 32.

[0041] Furthermore, the operating handle 4 is connected to the host 1 via a wireless communication module; the operating handle 4 has a built-in flushing pipe, and the two ends of the flushing pipe are respectively connected to the conduit 33 and the outlet of the fluid pump; the operating handle 4 is detachably connected to the brush handle 32.

[0042] It should be noted that the operating handle 4 is the core component that medical staff hold directly and perform oral care operations; its shell adopts an ergonomic streamlined design and is made of medical-grade ABS plastic with anti-slip texture to ensure a stable and comfortable grip.

[0043] Specifically, a wireless communication module is integrated inside the operating handle 4; this module preferably uses Bluetooth Low Energy technology; through this module, the operating handle 4 establishes a stable signal connection with the main controller inside the host 1, which is used to send commands to the host 1 such as start / stop rinsing, adjust negative pressure, etc., and receive status feedback from the host 1.

[0044] Wireless connectivity completely eliminates the dragging and tangling problems associated with traditional wired connections, giving medical staff greater freedom and flexibility in their operations, and is particularly suitable for scenarios requiring multi-angle operation around the patient's bedside.

[0045] The operating handle 4 has a flushing tube running through it from end to end. The front end of the flushing tube is sealed to the catheter 33 extending from the brush handle 32 via a standard medical quick-connect fitting; the rear end of the flushing tube is also connected to the hose from the fluid pump outlet of the main unit 1 via a quick-connect fitting.

[0046] The front end of the operation handle 4 is provided with a mechanical interface for connecting with the tail of the brush handle 32; the interface preferably adopts a mechanical buckle combination; specifically, a ring-shaped magnet is embedded in the front end of the operation handle 4, and a precise buckle mechanism is arranged on the side wall; the tail of the brush handle 32 is embedded with a magnetic guide sheet and provided with a buckle slot.

[0047] Further, the material of the collection bag 2 is transparent medical polyethylene plastic; the inner wall of the collection bag 2 is fixedly provided with a pH test paper 5, and the outer wall of the collection bag 2 is printed with a colorimetric card matched with the pH test paper 5.

[0048] It should be noted that the bag body of the collection bag 2 is integrally formed by a transparent medical low-density polyethylene LDPE plastic through a blow molding process; the pH test paper 5 is firmly pasted on the specific observation area of the inner wall of the collection bag 2 by a medical grade pressure sensitive adhesive; this fixing method ensures that the test paper will not shift or fall off in a wet environment.

[0049] The colorimetric card 5a is directly printed on the outer wall of the collection bag 2 by ink, and its position is accurately opposite to the installation area of the pH test paper 5 on the inner wall; the colorimetric card 5a is printed with standard color scales from acid to alkali, and each color scale is clearly marked with the corresponding pH value.

[0050] When the oral care operation starts, the waste liquid containing the patient's saliva is sucked into the collection bag 2; the waste liquid quickly infiltrates and acts on the sensing area of the pH test paper 5 fixed on the inner wall, and the acid-base indicator in the test paper reacts chemically, causing its color to change; the medical staff can directly observe the color of the pH test paper 5 after the change through the transparent bag wall from the outside of the collection bag 2, and compare it with the standard color scales printed on the colorimetric card opposite to the outer wall; by finding the closest color block, the approximate pH value reflected by the waste liquid in the current collection bag can be intuitively read.

[0051] The pH value of saliva is one of the important indicators reflecting the oral health status; abnormal pH value such as persistent low pH value may be related to the risk of dental caries, oral flora imbalance or some systemic diseases; the design makes it possible to regularly monitor the oral environment of bedridden patients for a long time, which helps to early detect potential problems and timely adjust the oral care program, and realizes more targeted preventive care.

[0052] In summary, the gas-liquid separation structure of the oral care device helps to reduce the risk of waste liquid entering the main machine pipeline, thereby improving the stability and safety of the device operation; the unique double-cavity isolation brush head design allows the flushing and suction processes to be performed simultaneously, which helps to improve the cleaning efficiency and reduce liquid residue in the mouth, thereby improving patient comfort; the pH monitoring function integrated into the collection bag provides an intuitive auxiliary means for evaluating the oral environment, which is conducive to achieving more targeted care; in addition, the wireless operation handle and modular connection design not only increase the operation flexibility, but also make the cleaning and maintenance of the device more convenient.

[0053] Reference Figures 1-9 In an embodiment provided in the present application, the anti-overflow unit 6 includes a Venturi tube 61 connected in communication with the exhaust pipe 21, and a gas bag 62 arranged inside the Venturi tube 61 for blocking the passage thereof; the Venturi tube 61 includes an outlet section 611 connected with the exhaust pipe 21, a throat section 612 located at a middle position, and an inlet section 613 connected with the throat section 612 away from the outlet section 611.

[0054] It should be noted that the anti-overflow unit 6 is a core component for ensuring the safe operation of the device, which is connected in series on the pipeline of the exhaust pipe 21 of the collection bag 2; the anti-overflow unit 6 mainly includes the Venturi tube 61 and the gas bag 62 arranged inside the Venturi tube 61.

[0055] The outlet section 611 is connected with the throat section 612 and is away from the inlet section 613, and is communicated with the exhaust end of the negative pressure aspirator inside the main machine 1 through a hose; the special structure of the Venturi tube 61 enables a local low-pressure area to be generated at the throat section 612 when the airflow passes through Further, the side wall of the gas bag 62 is provided with a gas guide pipe 621 penetrating into the inside thereof; the side wall of the throat section 612 is provided with a first circular hole 6121, and the gas guide pipe 621 penetrates through the first circular hole 6121 and extends to the outside thereof; the inside of the gas guide pipe 621 is provided with a one-way valve 63; the gas bag 62 is located inside the throat section 612; the inside of the gas bag 62 is provided with a balance pipe 64 in communication therewith, and the balance pipe 64 penetrates through the Venturi tube 61 and extends to the outside thereof.

[0056] It should be noted that the gas bag 62 is arranged inside the throat section 612 of the Venturi tube 61; the gas guide pipe 621 is led out from the side wall of the gas bag 62, penetrates through the first circular hole 6121 in the side wall of the throat section 612, and extends to the outside of the Venturi tube 61; the inside of the gas guide pipe 621 is provided with the one-way valve 63, and the airflow direction thereof is limited to flow from the outside of the Venturi tube to the inside of the gas bag; the balance pipe 64 is led out from the inside of the gas bag 62, penetrates through the pipe wall of the Venturi tube 61, and extends to the outside thereof.

[0057] The airbag 62 is also sealedly connected with a balance pipe 64; the balance pipe 64 penetrates the wall of the venturi 61 and extends the bottom opening thereof to a position below the venturi 61; the space inside the airbag 62 is completely separated from the throat section 612.

[0058] The balance pipe 64 and the air guide pipe 621 are both unblocked, and the venturi 61 starts to have a stable air flow passing therethrough; when the air flow passes through the throat section 612 of the venturi 61, due to the Venturi effect, the passage at this position is narrowed and the air flow velocity is sharply increased, resulting in a significant decrease in the static pressure thereof, forming a local low pressure area; this low pressure area is wrapped outside the airbag 62; at this time, the initial pressure inside the airbag 62 is the same as the atmospheric pressure outside, and the balance pipe 64 and the air guide pipe 621 are in communication with the space inside the collecting bag 2, so the pressure outside the airbag 62 is lower than the pressure inside the airbag 62; this pressure difference becomes the motive force driving the entire process.

[0059] Under the driving of the pressure difference ΔP, air will try to balance the pressure through two paths at the same time; the relatively high pressure of the outside air passes through the air guide pipe 621, opens the one-way valve 63 inside the air guide pipe 621, and enters the airbag 62.

[0060] At the same time, due to the fact that the pressure inside the airbag 62 is also higher than the low pressure of the throat section 612, a part of the air will be sucked out through the balance pipe 64 to the throat section; this is a dynamic competition process of simultaneous inflation and exhaust; since the air guide pipe 621 is provided with a one-way valve, it prevents the gas from flowing out in the reverse direction, so the net effect is that more gas enters the airbag than is exhausted, and the airbag starts to slowly net inflate.

[0061] With the net increase of the gas inside the airbag 62, the internal pressure thereof rises, and the airbag starts to expand; this process needs to overcome the elastic deformation force of the airbag material itself; the material will generate an increasingly large elastic force to resist the rise of the internal pressure.

[0062] As for the outlet of the balance pipe 64, due to the rise of the internal pressure of the airbag, while the low pressure of the outside throat section remains unchanged, the air flow sucked out through the balance pipe is increased.

[0063] That is, at a certain airbag volume, the air flow entering the airbag through the air guide pipe 621 is exactly equal to the air flow flowing out of the airbag through the balance pipe 64; at this time, the volume and the internal pressure of the airbag will remain stable and will not continue to increase.

[0064] In the balanced state, the airbag 62 is maintained at a "proper size"; it neither completely blocks the passage of the throat section 612.

[0065] Further, the flow direction of the one-way valve 63 is from the outside of the Venturi tube 61 to the inside of the air bag 62; when the bottom of the balance pipe 64 is blocked by the oral mucus, the air bag 62 is connected to the outside through the air guide pipe 621; the airflow flowing through the inside of the Venturi tube 61 generates negative pressure inside it, driving the external air to flow into the air bag 62 through the one-way valve 63, so that the air bag 62 expands.

[0066] It should be noted that one end of the air guide pipe 621 communicates with the inner cavity of the air bag 62, and the other end penetrates through the first circular hole 6121 in the side wall of the throat pipe section 612 of the Venturi tube to communicate with the external environment. The balance pipe 64 is independently arranged, one end of which communicates with the inner cavity of the air bag 62, and the other end extends to the outside of the Venturi tube 61 and remains open.

[0067] When the bottom opening of the balance pipe 64 is completely blocked by foreign matter such as oral mucus, due to the large surface tension of the oral mucus itself, these mucus will not be immediately sucked into the pipe, but will be blocked at the pipe port of the balance pipe 64 like a thin film; this blocking state makes it impossible for air to enter the air bag 62 through the balance pipe, at this time the inside of the air bag forms a closed cavity connected to the outside only through the air guide pipe 621.

[0068] In this state, the airflow in the Venturi tube 61 continues to flow, and the local low pressure effect generated in the throat pipe section 612 still exists; since the balance pipe 64 has been effectively blocked, this low pressure cannot be balanced by air extraction from the air bag. At this time, the external air continuously injects gas into the air bag through the air guide pipe 621 under the action of pressure difference.

[0069] With the continuous influx of gas, the pressure in the air bag continues to rise, pushing the air bag wall to expand outward. Although the air bag material will undergo elastic deformation, since the gas injection is continuous and one-way, the degree of deformation will significantly exceed the range of small deformation in the normal working state, and finally achieve effective blockage of the entire airflow passage.

[0070] When the airflow in the Venturi tube stops, the system pressure returns to normal, at this time the high-pressure gas accumulated in the air bag will seek a pressure relief channel; due to the blocking effect of the one-way valve in the air guide pipe, these high-pressure gases can only be discharged outward through the balance pipe blocked by mucus; during the discharge process, the high-pressure gas will break through the mucus blockage and enter the waste liquid in the collection bag, forming a clear bubble phenomenon; this unique "bubble" phenomenon can be used as a direct visual indication to inform the staff in time that the internal capacity of the collection bag is about to reach the saturation state, and needs to be replaced or processed in time.

[0071] In normal operation, the negative pressure aspirator inside the main unit 1 is continuously running, and through the exhaust pipe 21, a stable negative pressure environment is established in the collection bag 2. At this time, the airflow in the Venturi tube 61 is smooth, the air bag 62 is in a dynamic balance state under the joint action of the balance pipe 64 and the air guide pipe 621, and the anti-overflow unit keeps the passage open; when the waste liquid level in the collection bag 2 rises to the set height, the liquid first submerges the bottom opening of the balance pipe 64; due to the surface tension characteristics of the oral mucus, the mucus forms an effective seal at the pipe opening, so that the passage of the balance pipe 64 is completely blocked. At this time, the air bag 62 inside becomes a closed cavity connected with the outside only through the air guide pipe 621; under the blocked state of the balance pipe 64, the negative pressure continuously generated by the throat pipe section 612 of the Venturi tube 61 pumps external air into the air bag 62 through the one-way valve 63 of the air guide pipe 621. Under the continuous inflation effect, the air bag rapidly expands to overcome the material elastic limit and finally completely blocks the airflow passage of the Venturi tube 61; the blockage of the Venturi tube 61 passage directly leads to the destruction of the negative pressure environment inside the collection bag 2; after the main unit 1 negative pressure aspirator detects the system pressure anomaly, it automatically executes the protective shutdown program, which fundamentally cuts off the power source for the continuous suction of waste liquid; after the system is shut down, the high-pressure gas accumulated in the air bag 62 is slowly released through the balance pipe 64. These gases break through the mucus blockage at the pipe opening and enter the waste liquid in the collection bag, producing a continuous bubble phenomenon. This obvious "bubble" effect provides an intuitive visual warning for the staff, indicating that the collection bag is about to be full and the system has entered a protective state.

[0072] Finally, it should be pointed out that the methods and devices described in detail above are only embodiments, and those skilled in the art can modify these embodiments in different ways without departing from the scope of the present application.

[0073] It is important to note that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. An oral care device with a built-in miniature negative pressure pump and pH monitoring waste bag, characterized in that: Includes a main unit (1) and a collection bag (2); The host (1) integrates a negative pressure suction device and a fluid pump. The collection bag (2) includes an exhaust pipe (21) located at its top and a waste liquid pipe (22) extending to its bottom. The flushing component (3) is internally divided into an independent flushing chamber and a suction chamber. The suction chamber is connected to the waste liquid pipe (22) of the collection bag (2) through a hose, and the flushing chamber is connected to the outlet of the fluid pump of the host (1) through a hose. The collection bag (2) is filled with negative pressure by a negative pressure suction device, which forces oral mucus into the collection bag (2) through the suction chamber of the rinsing device (3).

2. The oral care device with built-in micro negative pressure pump and pH monitoring waste bag according to claim 1, characterized in that: The exhaust pipe (21) is connected to the exhaust end of the negative pressure suction device inside the main unit (1) via a flexible hose; The bottom outlet of the exhaust pipe (21) is located at the top of the collection bag (2), and the bottom outlet of the waste liquid pipe (22) is located at the bottom of the collection bag (2).

3. The oral care device with a built-in micro negative pressure pump and pH monitoring waste bag according to claim 1 or 2, characterized in that: The rinsing component (3) includes a hollow brush head (31), a brush handle (32) connected to the suction chamber inside the brush head (31), and a conduit (33) connected to the rinsing chamber inside the brush head (31). The conduit (33) passes through the inside of the brush handle (32).

4. The oral care device with built-in micro negative pressure pump and pH monitoring waste bag according to claim 3, characterized in that: The side wall of the brush head (31) is provided with a suction port (311), which is connected to the suction chamber; The brush head (31) has a rinsing port (312) at the end away from the brush handle (32), and the rinsing port (312) is connected to the rinsing chamber.

5. The oral care device with a built-in micro negative pressure pump and pH monitoring waste bag according to claim 4, characterized in that: It also includes, The operating handle (4) is connected to the host (1) via a wireless communication module; The operating handle (4) has a built-in flushing pipe, and the two ends of the flushing pipe are respectively connected to the conduit (33) and the outlet of the fluid pump; The operating handle (4) is detachably connected to the brush handle (32).

6. The oral care device with a built-in micro negative pressure pump and pH monitoring waste bag according to claim 5, characterized in that: The collection bag (2) is made of transparent medical polyethylene plastic; The inner wall of the collection bag (2) is fixedly provided with pH test paper (5), and the outer wall of the collection bag (2) is printed with a colorimetric card that matches the pH test paper (5).

7. The oral care device with a built-in micro negative pressure pump and pH monitoring waste bag according to any one of claims 1, 2, 4, 5 or 6, characterized in that: It also includes, The overflow prevention unit (6) includes a venturi tube (61) connected to the exhaust pipe (21) and an airbag (62) disposed inside the venturi tube (61) for blocking its passage. The venturi (61) includes an outlet section (611) connected to the exhaust pipe (21), a throat section (612) located in the middle, and an inlet section (613) connected to the throat section (612) away from the outlet section (611).

8. The oral care device with built-in micro negative pressure pump and pH monitoring waste bag according to claim 7, characterized in that: The sidewall of the airbag (62) is provided with an air duct (621) that extends into its interior. The throat segment (612) has a first circular hole (6121) on its side wall, and the air guide tube (621) passes through the first circular hole (6121) and extends to its outer side; The air duct (621) is equipped with a one-way valve (63). The air bladder (62) is located inside the larynx segment (612); The airbag (62) has a balance tube (64) connected to it, which passes through the venturi tube (61) and extends to its outer side.

9. The oral care device with a built-in micro negative pressure pump and pH monitoring waste bag according to claim 8, characterized in that: The vertical projection of the bottom opening of the balance tube (64) is located below the vertical projection of the bottom wall of the venturi tube (61). The airflow inside the Venturi tube (61) causes the pressure inside the throat section (612) to decrease. The airbag (62) is connected to the outside world through the air guide tube (621) and the balance tube (64), and maintains the pressure balance inside the airbag (62).

10. The oral care device with a built-in micro negative pressure pump and pH monitoring waste bag according to claim 8, characterized in that: The flow direction of the one-way valve (63) is from the outside of the venturi tube (61) to the inside of the airbag (62); When the bottom of the balance tube (64) is blocked by oral mucus, the airbag (62) is connected to the outside through the air guide tube (621); the airflow flowing through the venturi tube (61) generates negative pressure inside, driving external air to flow into the airbag (62) through the one-way valve (63), causing the airbag (62) to inflate.

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