172results about How to "There will be no leakage" patented technology

The invention relates to a high-viscosity and low-melting-point metal conductive paste and a preparation method and an application thereof. The high-viscosity and low-melting-point metal conductive paste is characterized in that the metal conductive paste is prepared by uniformly mixing low-melting-point metal and metal powder based on a certain proportion and by a certain method. The metal powder can improve the viscosity and electrical conductivity of the low-melting-point metal. By adopting the high-viscosity and low-melting-point metal conductive paste of the invention, the contact resistance between electronic components can be significantly reduced, the contact surface temperature of electronic components can be reduced, and the working life of electronic components can be prolonged as much as possible. The high-viscosity and low-melting-point metal conductive paste of the invention has high electrical conductivity, a remarkable electric conduction effect and a long service life, and can be widely used in the technical fields of electric power and energy.

The invention discloses an electronic device and a manufacturing method thereof. The electronic device comprises a shell, a battery cell and a sealing plate assembly; the shell comprises a base plateand a surrounding wall; an accommodating cavity for accommodating the battery cell is formed between the surrounding wall and the substrate; an opening communicated with the accommodating cavity is formed in the end, away from the substrate, of the surrounding wall; the sealing plate assembly is used for sealing opening; the sealing plate assembly comprises a body; the body is welded with the shell and blocks the opening; the body is provided with a first side face close to the accommodating cavity and a second side face opposite to the first side face; the first side face is in insulated connection with an electrode guide plate; the electrode guide plate is connected with one tab of the battery cell; a first protruding part is arranged on the side, close to the first side face, of the electrode guide plate in a protruding mode; a liquid injection hole is formed in the first protruding part in a penetrating mode; a first through hole allowing the first protruding part to pass through is formed in the body; the second side face is in insulation connection with a conductive sealing cover; and a second protruding part is arranged on the sealing cover in a protruding mode and insertedinto the liquid injection hole to block the liquid injection hole. The electronic device is simple in structure and reliable in sealing.

The invention relates to a single chip silicon SOI high temperature low drift pressure sensor in the field of sensitive sensing technology. Wherein the four voltage-sensitive resistances which form the Wheatstone bridge adopt SOI material; it adopts the interval compensation and the outer compensation technology of partial interval resistance of the SOI resistance network to make the zero point temperature drift below 1X10-6Vs / íµ; it adopts girder-film-island structure to improve the sensibility and linearity of the sensor; it adopts polysilicon with thick boron and the aluminum lead wire covered the lead wire surface to form the interval lead wire of the sensor; it adopts thick boron automatically end technology to make high sensibility high temperature low drift pressure sensor.

The invention discloses an electric car charging system. The electric car charging system comprises an electricity supply unit, a connection unit and an electric car body. The electricity supply unit is installed at the top of a garage and electrically connected with the connection unit. The connection unit is connected with an electric car. A charge couple of the electric car is located at the top of the electric car. The connection unit comprises a first magnetic joint and a second magnetic joint, the first magnetic joint is electrically connected with the electricity supply unit, and the second magnetic joint is installed at the charge couple of the electric car. The electric car charging system does not occupy any aboveground space, the existing garage can be reconstructed conveniently, the cost is low, and the whole charging process is completely and automatically controlled without manual repeated operation.

The invention discloses a box taking and placing mechanical arm. The mechanical arm comprises a supporting frame, a mechanical claw device mounted on the supporting frame and an offset drive device driving the mechanical claw device to move; the mechanical claw device comprises a clamping mechanism fixedly connected with the offset drive device and two symmetrically-arranged clamping plates; one end of each clamping plate serves as a connecting part, and the other end of each clamping plate serves as a clamping part; the connecting parts are fixedly connected with the clamping mechanism, and the clamping parts incline towards the inner side relative to the connecting parts; and the box taking and placing mechanical arm can replace manpower, and take and place packaging boxes like a medicine box on a goods shelf, manpower is saved, meanwhile, work efficiency is improved, the clamping parts incline towards the inner side, fixed-point clamping of the boxes can be achieved, and compared with a full-contact type mechanical claw in the prior art, the box taking and placing mechanical arm has the beneficial effects that positioning and clamping are easier, and clamping missing cannot appear.

The invention discloses a heat management system and method for a battery pack of an electric automobile, belonging to the field of heat management of a battery pack of an electric automobile. The system comprises a battery pack shell and a battery management system, wherein a T-shaped middle wind deflector is arranged inside the battery pack shell, is connected with one end of the battery pack shell and is used for partitioning the battery pack shell into two spaces; the two spaces are communicated with each other through a gap formed between the other end of the battery pack shell and the middle wind deflector; one end of the battery pack shell which is connected with the middle wind deflector is provided with a heat-radiating system and a heating system; the heat-radiating system comprises an air inlet system and an air outlet system; the air inlet system and the air outlet system are positioned on both sides of the middle wind deflector respectively, and are positioned outside the battery pack shell; and the heating system passes through the middle wind deflector and is arranged inside the battery pack shell. In the invention, the battery pack is subjected to heating and heat radiating through the air; and the heat management system has a simple structure, and is free from liquid leakage.

The invention discloses a spring assembly machine for a spring lock. The spring assembly machine for the spring lock is characterized by comprising a spring feeder, a feeding pipeline, a die holder, a feeding head and a material control device; the feeding head is provided with a plurality of vertical channels which are arranged in straight-line shapes and allow springs to pass through; the material control device is mounted on the side face of the feeding head; one end of the feeding pipeline is connected with the spring feeder, and the other end of the feeding pipeline is correspondingly communicated with the vertical channels; the die holder is provided with a spring channel corresponding to the feeding head and a station for placing a lock core; and the spring channel is correspondingly communicated with the vertical channels on the feeding head. With the adoption of the structure provided by the invention, the springs can be automatically fed in a spring hole of the lock core of a lock. The spring assembly machine has the advantages of convenience in operation, rapidness in assembly and no occurrence of neglected loading; and very high production efficiency can be brought to the assembly of the springs of the lock core.

The invention discloses a heating device for low-speed cookoff of insensitive explosives. The problems of partial heating, complicated assembly, low in usage safety, unstable heating power and uneven heating in the testing process in the prior art are solved. The heating device for low-speed cookoff of the insensitive explosive consists of a protection layer, a heating layer, a power connection column, an insulating sleeve, a heat insulating layer and an insulating layer, whole heating is adopted in the testing process, no obvious heat dissipation area exists at two ends, the testing assembly process is simple, the adopted heating layer, the adopted insulating layer, the adopted heat insulating layer and the adopted protection layer are made of a flexible material, safety is high, electric heating pieces are evenly distributed, heating powers at all positions are consistent, the electric heating pieces are embedded into a base material, whole heating is performed through the base material, and the temperature differences of points are small. The heating device for low-speed cookoff of the insensitive explosive can be used for field low-speed cookoff of the insensitive explosives and can be also used for field low-speed cookoff tests of various small-sized live ammunitions.

The invention relates to an electric heating pipe for heating liquid. The technical points are as follows: the electric heating pipe comprises a metal pipe, an insulation layer is arranged outside the metal pipe, a heat conducting layer is arranged between the metal pipe and the insulation layer, a heating membrane is arranged outside the insulation layer, and electrodes for leading current to the heating membrane are arranged on the heating membrane. The electric heating pipe has a simple structure and high heat transfer performance and safety performance, and the whole device can be effectively prevented from explosion.

The invention discloses an SMTP protocol data leak prevention method and system based on deep content analysis, and relates to the field of data protection. The method comprises the steps that a data leak prevention system for blocking secret-associated data is connected into a network boundary in series; the data leak prevention system is utilized for capturing an outgoing message and determining a protocol type of the outgoing message; when the protocol type of the outgoing message is determined to be an SMTP protocol, whether the outgoing message contains secret-associated data or not is judged; if it is determined that the outgoing message contains the secret-associated data, secret-associated data leak is blocked. According to the method and system, effective blockage of network boundary SMTP protocol sensitive data is achieved, deep analysis and real-time matching functions are provided for the outgoing message, the leak resistance phenomenon is avoided, enterprise data assets safety is effectively protected, transparency to users is achieved, user experience is not affected, and the method and system are easy for users to accept.

The invention discloses a digital peak clipping method and a digital peak clipping device, and belongs to the field of communication. The digital peak clipping method includes generating output noise signals according to amplitude values of carrier aggregation (CA) signals and a preset peak clipping threshold; acquiring frequency points, bandwidths and sampling rates of various first carrier signals in the CA signals; generating CA peak clipping coefficients according to the frequency points, the bandwidths and the sampling rates of the various first carrier signals and actuating filter processing for the CA peak clipping coefficients and the output noise signals to generate filtered and formed noise signals; and aligning the CA signals with the filtered and formed noise signals after the CA signals are delayed, and subtracting the filtered and formed noise signals from the delayed CA signals to generate peak clipping signals. The digital peak clipping method and the digital peak clipping device have the advantage of capability of reducing the peak clipping missing probability.

The invention discloses a production method of a battery cover plate provided with an explosion-proof structure. The production method comprises installation of an electrode terminal and installation of the explosion-proof structure. The production method specifically comprises the following steps of preparing parts; punching on a cover plate body to form a vent hole and an electrode through hole; installing an explosion-proof valve body; installing a lower protection film structure; installing an explosion-proof membrane structure; installing an upper protection film structure; nesting an electrode sealing ring into an electrode column; installing lower ceramic; nesting the electrode column into the cover plate body; putting upper ceramic and a snap spring in sequence; and carrying out vertical encapsulation, sealing and stabilizing treatment on the electrode terminal. The invention provides the production method of the battery cover plate provided with the explosion-proof structure, the method has a simple process, each step is easy to control, the battery cover plate has good overall sealing property and insulating property, the leakage phenomenon cannot occur, the produced battery cover plate has stable explosion-proof property, the overall performance stability of a battery is improved, the reject ratio of the battery in a production process is reduced and the cost is saved.

The invention relates to the field of feeds, in particular to forage grass crushing equipment. The problems that because the feed crushing is beneficial to the digestion and absorption of livestock and the granularity of the feed for feeding different livestock is different, the crushing degree cannot be controlled in traditional forage grass crushing equipment, the crushed forage grass with different lengths cannot be classified, and the screening effect is not good are solved. The equipment aims to solve the above problems. The equipment has two different crushing effects. During low-speed rotation. A motor rotating speed 1:1 is conveyed to a rotary drum, rotary drum cutting knives rotate, forage grass is cut, and the crushing degree of the forage grass is low; during high-speed rotation, a transmission system is accelerated to run, spring cutters on a rotating column are thrown out under strong centrifugal force; the number of the cutters is increased; meanwhile, the crushing degreeof the forage grass is low; the crushed forage grass is classified by a sieve plate, so that the long section and the short section can be collected; and the sieve plate can vibrate up and down, so that the feed is completely screened, and the situation that the feed is leaked occurs is avoided.

The invention discloses a glue coating device for producing garment fabric. The device comprises an operation platform, the upper surface of the operation platform is sequentially provided with a gluecoating chamber and a drying chamber from left to right, two transverse frames are fixedly and transversely mounted at the top of an inner cavity of the glue coating chamber, a plurality of nozzles are fixedly mounted on the two transverse frames at equal intervals, and a glue coating roller is located in the middle of the space between the two transverse frames; a booster pump and a glue storagetank are fixedly mounted on the outer surface of the top of the drying chamber, a second transition roller and a heating roller are sequentially mounted at the portion, located in an inner cavity ofthe drying chamber, of the operation platform from left to right, and the portion, located below the glue coating chamber, of the operation platform is fixedly provided with a liquid collection cover.The glue coating device conducts glue coating by adopting a multi-spraying glue coating mode, the glue coating roller is adopted for even trowelling and coating, glue coating is conducted more evenlyand fully, and the phenomenon of missing coating cannot occur; the fabric coated with glue is also dried, the speed of naturally drying the fabric is increased, and therefore the working efficiency is improved.

The invention discloses a multifunctional solar-assisted air-conditioning system. The multifunctional solar-assisted air-conditioning system comprises two parts of a refrigerant circulating system and a water circulating system, wherein, the refrigerant circulating system comprises a compressor, an indoor heat exchanger, a refrigerant-water heat exchanger, an outdoor heat exchanger, a high pressure liquid storage barrel, a throttling device, a three-way valve, an one-way valve and a gas-liquid separator which are sequentially connected; and the water circulating system comprises a solar heat collection device, a water tank, a water pump and the refrigerant-water heat exchanger which are sequentially connected. The multifunctional solar-assisted air-conditioning system of the invention can high efficiently realize the functions of a cool-warm air conditioner and a water heater, thereby having very strong energy-saving property, practicality, economy and broad market prospect. The multifunctional solar-assisted air-conditioning system is particularly applicable to the occasions which are rich in solar energy resources and simultaneously need the cool-warm air conditioner and the supply of hot water.

The invention relates to a water treatment device. The water treatment device comprises a housing and an audio detection device, wherein the housing is internally provided with a water inlet pipe, a water outlet pipe and a gas-liquid mixing device for mixing ozone and water in the housing, the water inlet of the gas-liquid mixing device is connected to the water inlet pipe, the water outlet of the gas-liquid mixing device is connected to the water outlet pipe, the housing is also internally provided with a controller and an ozone generator, the ozone generator is controlled by the controller, the ozone generator is also communicated with the gas-liquid mixing device by an ozone outlet pipe, and the audio detection device is used for picking up audio signals in the gas-liquid mixing device and is also controlled by the controller. According to the water treatment device, the water flow is detected by the audio detection device instead of the traditional solenoid valve, frequent switching is not needed and thus the service life is prolonged. Simultaneously, since the audio detection device is used for detecting the water flow based on the collected water flow audio signals, detection results are more accurate, the replacement frequency is low and the application cost is reduced.

The invention discloses a indirect-expansion multifunctional solar energy auxiliary air condition system, comprising a refrigerant circulation system and a water circulation system wherein the refrigerant circulation system comprises a compressor, an indoor heat exchanger, a refrigerant-water heat exchanger, an outdoor heat exchanger, a high-pressure solution storage barrel, a throttling device, a three-way valve, an one-way valve and a liquid-vapor separator which are connected in turn and the water circulation system comprises a solar energy collection system, a water tank, a water pump and a refrigerant-water heat exchanger. The indirect-expansion multifunctional solar energy auxiliary air condition system uses a very simple way, a new bridge module with a high-pressure solution storage barrel, a one-to-one connection method of three throttling elements and three heat exchangers and only two electric valves to realize the various function modes of the cold-hot air conditioner and water heater, therefore the cost and control difficulty is greatly reduced. The indirect-expansion multifunctional solar energy auxiliary air condition system is very suitable for the occasion with rich solar energy resources and in need of cold-hot air condition and hot-water supply.

The invention provides a display backboard, a manufacturing method thereof and a display device. The display backboard comprises a substrate, a light emitting component and a pixel definition layer, the light emitting component comprises a cathode, an anode and a light emitting layer, the pixel definition layer defines multiple openings, the light emitting layer is arranged in the openings and covers a preset area, towards the side surfaces of the openings, of the pixel definition layer, and different positions in the preset area are basically consistent in hydrophilicity. The light emitting layer in the display backboard is not bent after manufacture, and the thickness of the light emitting layer is highly uniform, so that the light emitting uniformity of the display backboard is high, and the light emitting layer is avoided from overflowing out of the openings in the manufacturing process; and thus, the display backboard is avoided from electric leakage or brightening in the circumference of a pixel unit in the using process, and the display effect of the display backboard is good.

The invention relates to a method and system for removing solvents from isocyanates obtained from phosgenation reaction with an aim to reduce content of heavy components in the solvents, improving purity of the solvents and increasing operation elasticity. Corresponding amine and the solvents are mixed through the phosgenation reaction and then mixed and reacted with phosgene in a mixer to obtainmixed liquor with materials including isocyanate, the solvents, the phosgene, HCI and the like, the phosgene and the solvents are removed from the mixture via a phosgene removing tower and a solvent removing tower respectively, and crude isocyanates free from the phosgene and the solvents and solvents containing the phosgene and HCl light components and trace isocyanate heavy components are obtained. With the method, content of the heavy components in the cyclic solvents can be effectively reduced, plugging frequency of the amine and the phosgene mixer is reduced, self-polymerization pollutionin a tray and scaling pollution in a reboiler are reduced, operation stability is improved, and meanwhile, energy consumption during solvent removal can be reduced; the method and system is simple inprocess, convenient in operation, energy saving, high in production efficiency and environment friendly.

The implementation method of the invention provides a document sending method and apparatus based on IM, the method and apparatus belongs to network communication field, the method includes: when a plurality of documents are determined to be transmitted, then compressing the documents and transmitting the compressed documents by IM software. The specific implementation method of the invention also provides a document transmission device based on IM, the method and apparatus have advantages of simple operation, avoid of document un-transmission.

The invention discloses a scooter handlebar vertical tube punching die. The scooter handlebar vertical tube punching die is characterized by comprising an upper die and a lower die. The upper die is provided with an upper punching pin, a guide tube and an inclined pushing block. The lower die is provided with sliding block punching pins on both sides, a guide column and a vertical tube positioning column. Compared with the prior art, the scooter handlebar vertical tube punching die has the advantages that a structure manufactured through the scooter handlebar vertical tube punching die can be manufactured in one step for ensuring the accuracy of a hole; three holes can be punched at the same time for avoiding punching missing; two processes are changed into one process for reducing manufactured costs.

The invention discloses a method of edge match for linear elements, which can improve the correction, efficiency and fault tolerance of edge match. According to the invention, a double restriction condition of spatial relation and attribute relation is adopted to avoid mis-matching of a linear object and avoid leaked connection by an edge matching table. The edge matching object is divided into internal and external object sets according to the relationship with the spatial range, times of edge match for each object are pre-constructed and judgment of spatial relation of edge match is converted into judgment of distance between end points of linear objects, so that the method provided by the invention, compared with the prior art, is higher in correction, stronger in fault tolerance, and higher in efficiency of searching for the edge matching objects.

The invention relates to a vibration sieve for reducing omitted mounting of inserts of products. The vibration sieve comprises a base (1), a vibrating disc (2), a vibrating trough (3), adjusting knobs (4), a section trough (5) and parts (6), wherein the base (1) is mounted on the vibrating trough (3); the vibrating disc (2) is mounted on the base (1); the section trough (5) is arranged at the output end of the vibrating disc (2); the adjusting knobs (4) are mounted at two ends of the section trough (5); and the parts (6) are mounted on the section trough (5). According to the invention, the phenomena that the mounting of the parts is omitted and the parts are not all mounted can be prevented.

The invention relates to a special foaming tool of a gear foaming plug, which is used on the foaming equipment of a water tank of a solar water heater. The gear foaming plug comprises a rotary self-locking mechanism and a gear and rack mechanism, wherein the rotary self-locking mechanism comprises a torsion sleeve, a plug body, a plug screw and a rolling sleeve, and the gear and rack mechanism comprises a rack pull rod, a gear pawl and a hollow rivet. The gear foaming plug adopts the gear and rack mechanism and a spiral groove structure. The plug only needs to be put into a heat insulation cylinder, and a locking sleeve is inwards pulled and twisted. Because of the single foaming plug, the foaming plug is free from the influence of a processing error, and the plug can be taken out just by pushing and twisting. Compared with a traditional foam plug, the invention has simple, light and convenient structure, simple operation, low labor strength and good sealing effect, can not generate the phenomenon of foam leakage and can not damage a product.

The invention discloses an HTTP protocol data leak prevention method and system based on deep content analysis, and relates to the field of data protection. The method comprises the steps that a data leak prevention system for blocking secret-associated data is connected into a network boundary in series; the data leak prevention system is utilized for capturing an outgoing message and determining a protocol type of the outgoing message; when the protocol type of the outgoing message is determined to be an HTTP protocol, whether the outgoing message contains secret-associated data or not is judged; if it is determined that the outgoing message contains the secret-associated data, secret-associated data leak is blocked. According to the method and system, effective blockage of network boundary HTTP protocol sensitive data is achieved, deep analysis and real-time matching functions are provided for the outgoing message, the leak resistance phenomenon is avoided, enterprise data assets safety is effectively protected, transparency to users is achieved, user experience is not affected, and the method and system are easy for users to accept.

The invention discloses a plate fixing and heating unit device belonging to the technical field of heat supply and heating. The plate fixing and heating unit device comprises a decorative plate layer internally provided with a heat supply device, a connecting frame and a moisture-proof insulating layer that are sequentially arranged. The plate fixing and heating unit device also comprises a fixedlock arranged between the connecting frame and the moisture-proof insulating layer, and two electrical-connecting blocks arranged on the moisture-proof insulating layer, wherein the two electrical-connecting blocks are respectively a first and a second electrical-connecting blocks when being respectively arranged on two opposite corners of the moisture-proof insulating layer, and are arranged in a negative parallel manner; the two electrical-connecting blocks are respectively first electrical-connecting blocks when being respectively arranged on two adjacent corners of the moisture-proof insulating layer, and are arranged in an equidirectional parallel manner; the heat supply device is arranged in the decorative plate layer, two ends of the heat supply device are respectively connected with the two electrical-connecting blocks; and during the assembly, the electrical-connecting blocks of two unit devices are in mutual contact. The invention can realize the advantages of uniformity in heating, high heat-radiating speed, no need of laying pipelines and damaging family decoration, simpleness in installation, random disassembly, recycling property, good stability, long service life, complete waterproof property, and resistance to pressure and expansion caused by heat and contraction caused by cold, and can be used in floor, bed surface and wall surface heat supply.

The invention relates to the technical field of ultraviolet sterilization, in particular to an ultraviolet radiation sterilization device. The ultraviolet radiation sterilization device comprises ultraviolet lamp modules, an ultraviolet lamp module mounting rack and an electric control device connected with the ultraviolet lamp modules. The ultraviolet lamp modules are slantingly arranged between upper and lower mounting plates of the ultraviolet lamp module mounting rack. According to the invention, in the water flow direction, the sections of the ultraviolet lamp modules are of an oval shape and the shape of each ultraviolet lamp module is close to a streamline shape and no shadow zone is generated, so that the device is ensured to have a better flow state and the sterilizing efficiency of the modules is improved. The ultraviolet lamp modules are arranged on the upper and lower mounting plates in a staggered mode, the phenomenon of missed radiation cannot occur and the sterilizing effect is more excellent.

The invention relates to a visual observation culture medium for nematode acute toxicity test and a preparation method of the visual observation culture medium for the nematode acute toxicity test and aims to solve the problem that an existing culture medium for the nematode acute toxicity test is inaccurate in counting, large in death judgment error, long in observation time and inaccurate in behavior observation. The visual observation culture medium comprises, by mass percentage, 45-60% of gypsum, 5-10% of activated carbon and the balance of distilled water. The preparation method includes uniformly mixing the gypsum with the activated carbon to pour into the distilled water, uniformly stirring to obtain mixture; pouring the mixture into a twelve-hole cell culture plate 0.1-0.2 centimeter in thickness; and standing on a horizontal platform till solidifying and obtaining the visual observation culture medium for the nematode acute toxicity test. The visual observation culture medium is easy to count, obvious in dead nematode judgment, easy for behavior observation and higher in test result correctness and accuracy, and can be applied to the nematode toxicity test.

The invention provides a battery module, which includes a battery pack, a sampling module and a casing. The battery pack includes several single cells and power connection pieces, and the power connection pieces are electrically connected to adjacent single cells. The casing is wrapped around the battery pack and the sampling module. The sampling module includes a flexible circuit board and a protection device. The flexible circuit board is electrically connected to a number of temperature sensors and voltage sampling terminals. The temperature sensor is connected to the power connection piece, and the voltage sampling terminal is electrically connected to the power connection piece. The inner insulating layer, the outer insulating layer covers the outer surface of the flexible circuit board, and the inner insulating layer is wrapped between the power connecting piece and the single battery. The invention solves the problems of complex assembly, error-prone and frequent leakage due to wire sheath wear in the traditional wire harness connection sampling method in the power battery field, and provides a battery module with high reliability, simple assembly and safety.

The invention discloses a sputum aspirator dedicated for pediatric nursing, comprising an exhaust port, a fixing seat, a pressure regulating valve, an adjusting knob, a check valve, a first connector,a connecting tube, a sputum suction device, a first needle, a pin, a sealing membrane, a second needle, a clamping groove and a collecting bottle. The sputum aspirator of the invention has the advantages of reasonable structure, low production cost and convenient installation, and the sealing membrane provided here can effectively ensure that the internal waste liquid does not leak to the outsideafter the collecting bottle is taken out and thus the pollution to the environment is also reduced; a motor provided in the invention can drive a sputum suction head sequentially through a coupling sleeve body, a transmission groove, a transmission head and a connecting cylinder body, thereby ensuring the range of sputum suction of sputum suction holes on one side without affecting the suction ofthe sputum suction; and sputum suction grooves are provided in the invention, so that the passage of outside air into the sputum suction grooves through a vent hole and small holes can be facilitated, thereby improving the absorption effect of the sputum, and at the same time, the discomfort caused by partial vacuum in the sputum suction site is also avoided.