168results about How to "Improve suction efficiency" patented technology

The invention discloses an intelligent thrombus suction and cutting system, and belongs to the field of medical instruments. According to the system, the design of double pressure sensors and the intelligent pressure feedback control technology are adopted, and the suction state (blood suction, thrombus suction or complete blockage) is accurately recognized by monitoring pressure changes in a negative pressure pump pipeline and a suction catheter in real time and combining historical data analysis. The system automatically adjusts parameters of a pipeline control valve, a negative pressure pump, a peristaltic pump and the like according to the parameters, and intelligent optimization control over the suction process is achieved. The innovative integrated design of the double-cavity catheter integrates the functions of suction and thrombus breaking, when the complete blockage state is judged, the thrombus breaking program can be automatically or manually started, thrombus is quickly broken through high-speed liquid impact or thrombolysis medicine injection, and long-time suction catheter blockage is effectively prevented. The system obviously improves the thrombus aspiration efficiency, reduces the blood loss amount of a patient, optimizes the operation process, and has a good clinical application prospect.

The invention relates to a thrombus aspiration system and a control method of the thrombus aspiration system, relates to the technical field of medical equipment, and can improve the thrombus aspiration efficiency. An intelligent control module in the system is configured to execute the steps of determining the pressure difference between the near end and the far end according to pressure data collected by a first pressure sensor and pressure data collected by a second pressure sensor, determining the pressure difference change rate of the pressure difference, and determining the pressure difference change rate of the pressure difference according to flow data collected by a flow sensor. Determining the flow change rate of the blood flow in the suction catheter; according to the pressure difference change rate and the flow change rate, the medium type corresponding to the current suction medium of the suction guide pipe is determined; when the suction medium is blood, intermittent suction is performed on the blood according to a preset frequency when a valve in the air pressure state conversion module is in a closed state; and when the suction medium comprises thrombus of a target volume, determining a target frequency corresponding to the target volume, and opening and closing a valve in the air pressure state conversion module for multiple times according to the target frequency while keeping suction.

The invention provides an air source heat pump system. The air source heat pump system comprises a compressor, a fin heat exchanger, a shell tube heat exchanger and a gas-liquid separator, wherein the shell tube heat exchanger comprises a gas tube, a liquid tube, a heat exchange tube and a liquid separating device, the air source heat pump system further comprises a four-way valve, the four-way valve is correspondingly communication with the compressor, the gas-liquid separator, the fin heat exchanger and the gas pipe, the fin heat exchanger is in communication with the liquid separating device through a orifice plate and a first one-way valve; the fin heat exchanger is in communication with the liquid tube through an expansion valve and a second one-way valve; the first one-way valve is used for the one-way conduction of the fin heat exchanger to the liquid separating device; the second one-way valve is used for the one-way conduction of the liquid pipe to the fin heat exchanger. By the adoption of the system, a liquid storage device of the liquid refrigerant does not need to be added in the system, so that the cost is saved; a large amount of liquid refrigerant cannot flow back to the compressor after defrosting is finished; during the refrigeration mode, the refrigerant running shell pass does not need to be subjected to suction superheat, so that the air suction pressure and the operation efficiency of the refrigeration mode are improved; and the overall use valve of the system is less, and the reliability is high.

The invention relates to the technical field of compressors, and discloses an air cylinder assembly and a compressor. The air cylinder assembly comprises a first air cylinder, a second air cylinder and a flow dividing channel. The first cylinder includes an intake passage having an intake port and an exhaust port. The second air cylinder and the first air cylinder are coaxially arranged. The shunting channel is arranged on the first cylinder and the second cylinder. One end of the shunting channel is a shunting inlet and is communicated with the air inlet channel, and the other end of the shunting channel is a shunting outlet and is positioned on the inner wall of the second cylinder. The axial size of the first air cylinder is larger than that of the second air cylinder. Air enters the air inlet channel through the air suction port and then is shunted, enters the first air cylinder through the air outlet and enters the second air cylinder through the shunting channel. According to the compressor, the axial size of the first air cylinder is larger than that of the second air cylinder, the diameter of the air suction port can be increased, the air inlet sectional area can be increased, the air suction amount during high-frequency operation of the compressor is improved, and the air suction efficiency is improved.

The present invention belongs to the technical field of medical devices, and specifically is a nursing suction device for an intensive care unit, including a left bottle, a right bottle, a gas transmission mechanism, a mounting frame, and a reversing mechanism. In order to improve the suction efficiency and reduce the discomfort of patients, a single-tube delivery method is adopted, and the patient can be treated with suction therapy and expectorant therapy respectively, reducing the number of pipes inserted into the affected part, and at the same time, the steps of pulling out and plugging pipes and expectorant therapy when treating thick sputum can be optimized, shortening the treatment time while improving the suction efficiency, solving the problem that traditional suction devices cannot perform expectorant therapy and too many pipes are inserted into the affected part for suction therapy. At the same time, the adjustment method of suction and expectorant is simple, and only the switching coil magnet and the trigger judgment of the left trigger and the right trigger need to be exchanged, which helps medical staff to master the use method more quickly, improve work efficiency, and save precious time.

The invention discloses a surface cleaning device with good decontamination effect, comprising a floor brush with a roller brush, the floor brush is provided with a decontamination device abutting against the roller brush, the decontamination device comprises a scraping piece, a combing piece located below the scraping piece, the combing piece is provided with a plurality of comb teeth and a connecting portion extending from the comb teeth to the lower surface of the scraping piece, the connecting portion abuts against the lower surface of the scraping piece, the comb teeth and the connecting portion form a front combing surface, the front combing surface abuts against the roller brush, the scraping piece extends in the direction of the roller brush over the front combing surface, the liquid flow scraped by the scraping piece forms a filling area between the connecting portion and the lower surface of the scraping piece, the liquid flow in the filling area gathers and increases pressure to flush the gap between the comb teeth. The surface cleaning device not only has a good effect in treating general garbage, but also does not leave entangled objects such as hair on the roller brush, does not require customers to manually clean the roller brush, has high dirt suction efficiency, good dirt suction effect, is more intelligent and humane, and has a good customer experience.

The invention provides a metal cutting device capable of recycling scraps. The metal cutting device comprises a cutting device and a recycling device. The cutting device comprises a chuck box, a tool rest box, a workbench, a cutting frame and an air cooling device. The recycling device comprises two negative pressure collecting devices located below the workbench and a waste chip crushing device located between the two negative pressure collecting devices, a waste chip transfer device is arranged below the waste chip crushing device, two waste chip transfer boxes are arranged below the waste chip transfer device, each waste chip transfer box is connected with one compressing device, and the compressing devices are connected with the waste chip transfer boxes. And the outlet of each pressing device is communicated with one waste chip box. Through the cooperation of the negative pressure collecting device, the waste chip crushing device, the waste chip separating and rotating device, the compressing device and the like in the recycling device, metal waste chips generated in the cutting process are recycled, meanwhile, the metal waste chips are coarsely separated, the recycling and arranging efficiency of the metal waste chips is improved, and the recycling and arranging efficiency of the metal waste chips is improved. The labor intensity of workers is relieved, and resource waste is avoided.

The utility model discloses a split type dust collection mechanism which comprises an exhaust fan, an air pipe, a dust collection cover and a controller, a cavity with an opening is formed in the dust collection cover, the opening is sealed by a mesh, one end of the air pipe is connected with an air inlet pipe of the exhaust fan in an inserted mode, the other end of the air pipe is connected into the cavity, and the controller is electrically connected with the exhaust fan. The dust collection cover can be directly arranged on the periphery of the industrial cutting equipment in a covering mode before the dust collection cover is used, so that in the starting process of the exhaust fan, the dust collection cover is used for continuously sucking air carrying dust in multiple directions on one hand, air and dust are separated in situ on the other hand, the exhibition construction environment is improved, and mutual influence between exhibition points is avoided.

The invention discloses a suction catheter, and belongs to the technical field of medical instruments. The suction catheter comprises a catheter assembly and a shearing part, the catheter assembly comprises an outer tube, a middle tube and an inner tube, the outer tube sleeves the middle tube, a first suction cavity is formed between the outer tube and the middle tube, the inner tube is provided with a second suction cavity, the middle tube sleeves the inner tube, a shearing cavity is formed between the middle tube and the inner tube, and the near ends of the outer tube and the inner tube are both connected with a vacuum source. The first aspiration cavity and the second aspiration cavity respectively form negative pressure for aspirating thrombus, the pressure of the second aspiration cavity is not smaller than that of the first aspiration cavity, and the shearing part is arranged at the far end of the catheter assembly; after the thrombus is sucked in the second suction cavity, the shearing piece can shear the thrombus located outside the second suction cavity, the suction catheter does not need to be withdrawn out of the body, the surgical risk is reduced, and the thrombus is prevented from escaping and falling off.

The invention belongs to the technical field of medical instruments, and particularly relates to a nursing sputum suction device for an intensive care unit, which comprises a left bottle, a right bottle, a gas transmission mechanism, a mounting frame and a reversing mechanism. In order to improve sputum suction efficiency and reduce discomfort of a patient, a single-tube conveying mode is adopted, sputum suction treatment and sputum reduction treatment can be carried out on the patient respectively, the number of tubes inserted into an affected part is reduced, meanwhile, the steps of tube pulling and inserting and sputum reduction treatment can be optimized when thick sputum is treated, the treatment time is shortened, and meanwhile the sputum suction efficiency is improved. The problems that a traditional sputum suction device cannot conduct sputum suction treatment and too many sputum suction treatment pipes are inserted into an affected part are solved, meanwhile, the adjustment mode of sputum suction and sputum suction is simple, only a coil magnet needs to be switched on and off, triggering judgment of a left trigger and a right trigger needs to be exchanged, medical staff can master the using method more quickly, working efficiency is improved, and the medical staff can conveniently use the sputum suction device. And precious time is saved.

The present invention relates to the field of computer technology, and discloses a host device of a computer, comprising a chassis, a cover plate, a mounting plate, an exhaust fan, an exhaust pipe, and a connecting seat. The cover plate is fixed to the chassis by bolts, the mounting plate is arranged at the inner wall of the chassis, the exhaust fan is mounted on the mounting plate, the mounting plate is used to install host components, the exhaust pipe is vertically fixed to the plate surface of the cover plate, one end of the exhaust pipe penetrates the plate surface of the cover plate and is provided with a protective net, the other end of the exhaust pipe is fixedly connected to the connecting seat, an exhaust channel is opened on the connecting seat, when the cover plate is matched and mounted on the chassis, the connecting seat and the frame of the exhaust fan are matched and contacted, when the host device is working, the exhaust fan extracts the hot gas in the chassis, and then discharges it through the connecting seat and the exhaust pipe, and by transporting and discharging the hot gas through pipelines, it can be prevented that the hot gas is dispersed everywhere in the chassis, and the efficiency of sucking out the hot gas is improved, thereby improving the heat dissipation and cooling of the host device.

The utility model relates to the technical field of pile foundation hole cleaning devices, in particular to a bridge pile foundation hole cleaning device suitable for a karst area, which comprises a fixing frame, a traction structure arranged on the fixing frame, and a cleaning structure connected with the traction structure and arranged in the middle of the lower portion of the fixing frame in a lifting mode. The fixing frame is adjusted to be aligned with the middle position of the pile foundation hole, the cleaning structure can be lowered to the middle position of the bottom of the pile foundation hole by operating the traction structure, cleaning efficiency can be improved, and the cleaning structure is not prone to colliding with the hole wall when entering and exiting the pile foundation hole. The cleaning structure comprises a flushing channel, a water absorbing channel, a water supplementing channel and a rotary stirring piece, the upper portion of the rotary stirring piece is rotatably arranged in the flushing channel, the flushing channel has the functions of flushing and driving stirring at the same time, and the water absorbing channel and the water supplementing channel are arranged on the two sides of the flushing channel respectively; and the water supplementing channel can wash sediments on one side to the other side, so that the cleaning time is saved, and the cleaning effect is improved.

The application discloses an underground pipeline water flushing detection machine, which comprises a main unit and a handheld working unit; the handheld working unit comprises a holding part and a working long pipe; the holding part is provided with a switching cavity and a switching handle; one side of the switching cavity is provided with a mud interface and a water interface; the mud interface is connected with a suction inlet through a first hose; the water interface is connected with a water outlet through a second hose; the other side of the switching cavity is communicated with the working long pipe; a sealing block which can be rotated to block the mud interface and the water interface is arranged in the switching cavity; the sealing block is connected with the switching handle; the underground pipeline water flushing detection machine can flush and suck the underground pipeline in the detection hole for multiple times through the single working long pipe; the switching between the sucking and the flushing can flush the impurities adhered or retained in the working long pipe, so that the mud sucking efficiency is improved.

The invention discloses a cylindrical vacuum suction cup tool clamp, and belongs to the technical field of tool clamps, the cylindrical vacuum suction cup tool clamp comprises a cylindrical suction cup and a sealing strip, a plurality of circular sealing grooves are concentrically formed in the cylindrical suction cup in the radial direction, the corresponding circular sealing grooves are selected according to the sizes of different parts, and sealing is conducted through the sealing strip; by means of the negative pressure adsorption device, the formed negative pressure adsorption space can be expanded to the maximum outline of a part, the adsorbability of the part is improved, the adsorption safety and reliability of part clamping are guaranteed, and the machining efficiency is improved. The cylindrical vacuum chuck tool clamp is simple in structure, high in universality, low in manufacturing cost and high in working efficiency, achieves a good using effect and has good application prospects and popularization value.

The utility model relates to an automatic liquid suction device which comprises a driving device, the output end of the driving device is connected with a clamping assembly, the clamping assembly clamps a liquid suction gun, and the liquid suction gun is connected with a first storage container through a connecting pipe set. The driving equipment drives the liquid suction gun to do linear motion in the vertical direction through the clamping assembly, so that the end of the liquid suction gun is immersed into the solution in the second storage container, and then the solution in the second storage container is transferred into the first storage container through the liquid suction gun. The full-automatic barreled solution suction device can achieve full-automatic barreled solution suction, manual participation is not needed, the manual labor intensity and harm of toxic solutions to the human body are reduced, the cleanliness is high, pollution to the environment is reduced, the suction efficiency is high, and the residual quantity of sucked solution is low.

The application discloses a high-efficiency thrombus taking device, which comprises a catheter, the catheter comprises a catheter main body and an expandable distal end with a diameter expandable structure arranged at the distal end of the catheter main body, the expandable distal end is fixedly connected with the distal end of the catheter main body, a constriction elastic element and a traction wire for controlling self-expansion of the expandable distal end or compression of the expandable distal end are arranged on the expandable distal end, the proximal end of the constriction elastic element is fixedly connected with the distal end of the catheter main body, the constriction elastic element is sleeved outside the expandable distal end, and the constriction elastic element can press the expandable distal end and make the expandable distal end be constricted in the constriction elastic element in a natural state, the catheter main body is only needed to realize transportation of the expandable distal end and self-expansion of the expandable distal end or compression of the expandable distal end, the thickness of the catheter is reduced, the thrombus can be conveniently cleaned, the pumping efficiency can be effectively improved, and the device is suitable for various blood vessels with different diameters.

The invention relates to the field of in-vitro diagnosis automation equipment, in particular to a liquid sucking device and a liquid changing system. A liquid suction device comprises a confluence piece, a first liquid suction assembly, a second liquid suction assembly and a liquid suction driving assembly. The first liquid suction assembly is used for sucking liquid above a first liquid level in the container, and the first liquid suction assembly is communicated with the confluence piece; the second liquid suction assembly is located on the downstream of the first liquid suction assembly and used for sucking liquid above a second liquid level in the container, the second liquid level is lower than the first liquid level, and the second liquid suction assembly is communicated with the confluence piece; the liquid suction driving assembly is in driving connection with the first liquid suction assembly and the second liquid suction assembly so that the first liquid suction assembly and the second liquid suction assembly can sequentially suck liquid in the container and convey the liquid to the confluence piece. The liquid suction device is high in liquid suction efficiency, short in consumed time and capable of improving the instrument testing speed.

The utility model relates to the field of slurry wall protection drilling, especially relates to a slurry separation tank for reverse circulation drilling machine, including primary sedimentation tank, secondary sedimentation tank, residue storage tank, slurry input pipe, sand separating mechanism and slurry output pipe, secondary sedimentation tank is connected with primary sedimentation tank, residue storage tank is connected with secondary sedimentation tank, and the lateral wall of primary sedimentation tank is provided with overflow, and overflow is communicated with secondary sedimentation tank, slurry input pipe is connected with primary sedimentation tank, and slurry input pipe is used for injecting slurry to primary sedimentation tank, sand separating mechanism is connected with secondary sedimentation tank, and sand separating mechanism is communicated with residue storage tank, slurry output pipe is communicated with secondary sedimentation tank, and the sludge suction efficiency in secondary sedimentation tank is increased by setting conical fairing on the circulating pipeline, the slurry that is extracted from pile foundation hole is discharged into primary sedimentation tank through slurry input pipe and carries out preliminary deposition, the slurry after preliminary deposition enters secondary sedimentation tank through overflow, and the drilling residue of smaller particle is removed by slurry through sand separating mechanism.

The present application provides a medium-to-large-sized river channel sediment zero-carbon self-repairing system and topological structure, the medium-to-large-sized river channel sediment zero-carbon self-repairing system comprises: a mud brick integrated machine is provided beside the river channel, a photovoltaic array is installed on at least one side of the river channel bridge, the photovoltaic array converts direct current into alternating current through an inverter to power the mud brick integrated machine; wherein, the number of photovoltaic panels in the photovoltaic array is determined according to the length of the bridge, the maximum photovoltaic output power generated by the photovoltaic array is calculated according to the length of the bridge, the total amount of sediment that the mud brick integrated machine needs to process is calculated, and the model of the mud brick integrated machine is selected based on the maximum photovoltaic output power and the total amount of sediment, so that the amount of photovoltaic energy generated by the photovoltaic array matches the energy consumption of the mud brick integrated machine, forming a medium-to-large-sized river channel sediment zero-carbon self-repairing system. The present application also arranges all river channel data through logical operations by setting a topological structure between the power supply side and the load side of the river channel, thereby realizing sediment zero-carbon self-repairing.

The invention discloses a vacuum vessel and a processing technology thereof. The vacuum vessel comprises an outer shell, an inner shell and a vacuum layer between the outer shell and the inner shell. A suction opening is formed in the bottom of the shell, and an auxiliary part is arranged in the suction opening; the auxiliary part comprises a conical ring, a first conical hole and a second conical hole; the suction port is connected with the end face of the shell through a conical surface; an annular groove is formed in the first taper hole, and the annular groove is filled with a first sealing layer in the contraction direction of the first taper hole; a second sealing layer is filled between the conical ring and the conical surface; the second taper hole is filled with a third sealing layer in the extending direction between the annular groove and the end face of the shell. According to the vacuum cup and the processing technology thereof, the sealing effect of the vacuum cup is better by arranging the multiple sealing layers, better anti-falling performance is achieved when the vacuum cup is impacted or falls, and air leakage of the vacuum layers is prevented.

The present invention discloses a suction catheter, which belongs to the technical field of medical devices. The suction catheter includes a catheter assembly and a shearing piece, the catheter assembly includes an outer tube, an intermediate tube and an inner tube, the outer tube is sleeved on the intermediate tube to form a first suction cavity between the two, the inner tube has a second suction cavity, the intermediate tube is sleeved on the inner tube to form a shearing cavity between the two, the proximal ends of the outer tube and the inner tube are connected to a vacuum source, so that the first suction cavity and the second suction cavity respectively form negative pressure for suctioning thrombus, and the pressure of the second suction cavity is not less than the pressure of the first suction cavity, and the shearing piece is arranged at the distal end of the catheter assembly; after the second suction cavity sucks the thrombus, the shearing piece can shear the thrombus located outside the second suction cavity, without withdrawing the suction catheter out of the body, reducing the surgical risk and preventing the thrombus from escaping and falling off.

The reciprocating compressor silencer comprises a shell and a separator, the shell is provided with an air inlet and an air outlet, the separator is arranged in the shell and divides an inner cavity of the shell into an upper cavity and a lower cavity, the upper cavity is communicated with the air outlet, the lower cavity is communicated with the air inlet, and the air inlet is communicated with the air outlet. A plurality of reflecting rib plates are arranged on the inner wall of the top of the shell and divide the upper cavity into a plurality of cavities, an air inlet hole communicated with the upper cavity and the lower cavity is formed in the separator, the air inlet hole and the air outlet are located in the same cavity, and the side edges of the bottoms of the reflecting rib plates are obliquely arranged relative to the horizontal plane. The inclination angles of the bottom side edges of the multiple reflection rib plates are different, gaps are formed between the bottom side edges of the multiple reflection rib plates and the isolation piece, and the widths of the gaps between the multiple reflection rib plates and the isolation piece are different. The technical problem that an existing device cannot give consideration to improvement of the air suction efficiency and reduction of noise is solved, and the air suction efficiency and the noise reduction performance are improved.

This utility model discloses a material suction device and a material suction system. The material suction device includes a suction pipe and a support frame. The suction pipe has a suction port and a discharge port at its two ends, respectively. The support frame is disposed on the outer wall of the suction pipe and surrounds the perimeter of the suction port. The support frame is used to open the bag opening of the material bag and form a suction space communicating with the suction port at the bag opening. At least one arc-shaped chamfer is provided at the end of the support frame away from the discharge port. A first guide slope is also provided at the end of the support frame away from the discharge port. The support frame includes a first connecting surface and a second connecting surface arranged opposite each other along the radial direction of the suction pipe. The first guide slope is connected to the first connecting surface and / or the second connecting surface by an arc-shaped chamfer. The first guide slope is inclined towards the central axis of the suction pipe from the discharge port to the suction port, thereby preventing the support frame from obstructing the suction port and improving the material conveying effect and efficiency.

The utility model relates to the technical field of sewage treatment, in particular to a novel submersible sewage pump shaft seal device which comprises a pump body rotating shaft, a shaft seal mechanism is arranged on the outer side of the pump body rotating shaft, the shaft seal mechanism comprises a shaft seal base, an elastic diaphragm is fixedly connected to the outer side end of the shaft seal base, a plurality of diaphragm holes are formed in the shaft seal base, and the diaphragm holes are communicated with the shaft seal base. A guide cavity is formed in the middle of the interior of the shaft seal base, through work of the shaft seal mechanism, when the density of liquid on the outer side is increased and the liquid is very sticky, the elastic diaphragm deforms through the change of the pressure intensity, then the bottom end shaft seal rubber sleeve deforms through the internal pressure intensity, and then the shaft seal rubber sleeve is changed into a U shape from an original V-shaped section; on the basis of the original sealing function, the friction force can be increased, the speed of the rotating shaft is reduced, the flow speed of sewage is reduced, the staying time of liquid in a pipeline is prolonged, the situation that sticky liquid adheres to the wall of the pipeline is reduced, and the suction efficiency is improved.

The invention discloses a coal mine underground sludge cleaning device which comprises a vehicle body, a sliding rail is arranged on the vehicle body, a sliding table is slidably arranged on the sliding rail, a connecting pipe is fixed to the front face of the sliding table, the tail end of the connecting pipe is connected with a volute shell, a discharging opening is formed in the side face of the volute shell, the discharging opening is connected with a guide pipe, and the guide pipe is connected with the sliding table. The guide pipe is connected to a sludge pump arranged on the vehicle body, and the sludge pump is further connected to a sewage draining exit on the ground. Compared with the prior art, efficient, safe and environment-friendly sludge cleaning work is achieved, and a remarkable effect is brought to underground coal mine sludge cleaning.

The invention relates to the technical field of medical instruments, and discloses an anti-hypoxia sputum suction catheter which comprises an oxygen uptake catheter and a sputum suction catheter assembly arranged in the oxygen uptake catheter in a penetrating mode, the right end of the oxygen uptake catheter and the right end of the sputum suction catheter assembly are communicated with a three-way pipe, and the periphery of the three-way pipe is fixedly connected with a fixing shell. The left end of the three-way pipe is fixedly connected with a check valve, the right end of the three-way pipe is communicated with a branch pipe and a connecting pipe, the tail end of the connecting pipe is provided with a pneumatic pump, and the middle of the pneumatic pump is fixedly connected with an adjusting valve. By means of the coaxial double-tube structure and the three-way tube shunt design, continuous oxygen supply is kept while the sputum aspirator goes deep into an airway for sputum aspiration, suffocation of a patient is effectively prevented, accurate adjustment and visual monitoring of negative pressure are achieved by means of the pneumatic pump assembly integrating the adjusting valve and the display screen, and the safety and efficiency of sputum aspiration operation are remarkably improved.

The utility model relates to the field of impellers, in particular to a dust collector impeller. Comprising a wheel disc, the wheel disc is provided with a plurality of blades, and the blades are spirally arranged around the axis of the wheel disc; air inlets are formed in one sides of the wheel disc and the blades, and air outlets are formed in the other sides; an airflow channel is formed between the air inlet and any air outlet; wherein each blade is provided with a wheel disc line and a wheel cover line, and the wheel disc lines and the wheel cover lines are arranged to be Bezier curves; an included angle theta is formed between a connecting line between the end points, close to the air outlet, of the wheel disc line and the wheel cover line and the axis of the impeller, and the included angle theta enables the blades to have parts exceeding the outer edge face of the wheel disc on plane projections, perpendicular to the axis, of the blades and the wheel disc. According to the impeller, the blades and the wheel disc of the impeller are manufactured in an integrated forming mode, compared with traditional plug-in type blades, assembly tolerance does not exist between the blades, the dynamic load is reduced, and the impeller has the higher rotating speed.

The invention provides a hyperbaric oxygen chamber oxygen inhalation mask for a patient with an indwelling stomach tube, and belongs to the technical field of medical instruments. Comprising an oxygen inhalation mask, a sputum suction mechanism is arranged on the inner side of the oxygen inhalation mask and used for sucking and removing sputum on the inner side of the nasal cavity of a stomach tube patient, the sputum suction mechanism comprises a second rubber hose fixedly connected to the inner side of the oxygen inhalation mask, and one end of the second rubber hose is fixedly connected with a corrugated hose; one end of the corrugated hose is fixedly connected with a first rubber hose; the stomach tube is arranged on the inner side of the second rubber hose and penetrates through the inner side of the first rubber hose, and sealing rubber used for sealing the first rubber hose and the stomach tube is arranged at the contact position of the inner side of the first rubber hose and the stomach tube. Through mutual cooperation of the sputum suction mechanism and the sputum removal mechanism, sputum in the nasal cavity can be sucked into the inner side of the corrugated hose through the Z-shaped through hole, and the effect of cleaning the nasal cavity of a patient is achieved.

This utility model relates to the field of laboratory medicine cabinet technology, and discloses a laboratory medicine cabinet with automatic wind power adjustment. It includes a cabinet body, a storage cabinet on the right side, and a control cabinet on the left side. A front door panel is hinged to the front of the storage cabinet, and a limit switch is fixedly installed above the storage cabinet. An air suction device is installed on the storage cabinet behind the drawers. The air suction device includes suction pipes, with multiple suction pipes located behind each drawer and fixed to the storage cabinet. Filter holes are distributed on the side of the suction pipes facing the drawers. A main suction pipe is connected to the left side of the multiple suction pipes. The bottom end of the main suction pipe is closed, and the top end is connected to the air inlet of a centrifugal fan. The main suction pipe and the centrifugal fan are fixedly installed inside the control cabinet. The centrifugal fan of this utility model can automatically increase and decrease its speed according to the opening and closing of the door, removing harmful gases disturbed when the door is opened, preventing leakage, maintaining a stable slight negative pressure inside the cabinet when the door is closed, and reducing energy consumption.

The utility model discloses a ceramic product polishing device with a cleaning function, which comprises a pedestal, a polishing mechanism is arranged on one side of the top of the pedestal, the ceramic product polishing device with the cleaning function further comprises a connecting seat, and the connecting seat is fixedly mounted on the back of the polishing mechanism. According to the scheme, before the ceramic is polished through the polishing mechanism, the absorption cavities horizontally deflect around the mounting column so that the absorption cavities can be located on the two sides of the ceramic, then the ceramic placed on the table top of the table base is polished through the polishing mechanism, and meanwhile the draught fan arranged at the top of the connecting base is started; according to the grinding device, the supporting frame at the top of the grinding device is separated from the surface of the collecting bin, and after the fixing column moves by the maximum distance, the collecting bin can be horizontally moved out of the connecting base so that dust collected in the collecting bin can be treated in a unified mode, and therefore grinding dust can be cleared away in time, and the influence of the dust on the surrounding environment and equipment is avoided; and the practicability of the device is improved.