29 results about "Bacterial Filter" patented technology

The utility model discloses an oxygen generator structure with replaceable molecular sieves, comprising a casing, a molecular sieve tower, a battery valve, a bacterial filter, an air intake cover, a partition, an air intake filter, an air intake louver and other components. The molecular sieve tower adopts a modular structure in which a molecular sieve tower A tube, a molecular sieve tower B tube and an oxygen storage tube are integrated. When replacing the molecular sieve tower, it is only necessary to open the air intake cover, remove the air intake filter and the partition, and open the molecular sieve tower cover, and the entire molecular sieve tower can be inserted into the main cavity of the casing from the molecular sieve tower installation port at the bottom of the casing. After that, the air pipe of the molecular sieve tower can be quickly connected to the electromagnetic valve and the bacterial filter without the partition blocking. The utility model has a simple structure and a reasonable design, and can facilitate users to quickly and easily install and replace the molecular sieve tower.

The air purifier comprises a machine body, the machine body comprises an outer machine sleeve and an inner machine sleeve, an air inlet part and an air outlet part are arranged at the two ends of the outer machine sleeve respectively, the outer machine sleeve and the inner machine sleeve are coaxially arranged, and the inner machine sleeve and the outer machine sleeve are coaxially arranged. The inner unit sleeve is sequentially provided with a first filtering system, a cleaning system, an air suction system and a second filtering system, the first filtering system is connected with the air inlet part, an air supply channel is arranged between the first filtering system and the air inlet part, and the second filtering system is connected with the air outlet part. The air suction system is connected with the first filtering system and the second filtering system. The structure can improve the utilization efficiency of the dust filter and prolong the replacement period of the filter element, and is simple and convenient to operate and lower in use cost. The air outlet efficiency is high, the air filtering efficiency of the bacterial filter can be improved, and the reliability is higher.

The bacterial filter comprises an upper shell, a lower shell, a filter screen, an umbrella-shaped shell and an umbrella-shaped silica gel sheet, the upper shell and the lower shell are buckled and fixedly connected to form a filter cavity, an air inlet pipe communicated with the filter cavity is arranged on the outer side of the upper shell, and an air outlet pipe communicated with the filter cavity is arranged on the outer side of the filter screen. The umbrella-shaped shell is fixed to the outer side of the lower shell in a buckled mode and forms a non-return cavity, the non-return cavity is communicated with the filtering cavity through a through hole formed in the center of the surface of the lower shell, an air outlet pipe communicated with the filtering cavity is arranged on the outer side of the umbrella-shaped shell, and the filtering net is arranged in the filtering cavity and separates the air inlet pipe from the air outlet pipe. The umbrella-shaped silica gel sheet is movably placed in the non-return cavity; when too much liquid is added to the water level in the humidifying cup and flows back, the umbrella-shaped silica gel sheet is pushed by the backflow liquid and is attached to the umbrella-shaped sealing face, so that the umbrella-shaped silica gel sheet separates the non-return cavity from the filtering cavity, and the liquid in the humidifying cup is prevented from flowing back into the oxygen generator to cause damage to a compressor.

The invention relates to a quick starting method of a biological filter bed based on fungus-bacterium coordinated regulation. The quick starting method adopts a two-step method and comprises the following steps: firstly, quickly starting a bacterium filter bed by taking benzyl alcohol as a carbon source; adjusting the pH value to 5.5-6.2, adding wheat bran, and implementing intermittent hypoxia stimulation (replacing antibiotics) until the absolute copy number ratio of fungi / bacteria is (F / B) gt; and the starting is finished when the temperature is 0.35. The whole process is free of antibiotics, the starting period is smaller than or equal to 14 days, the methylbenzene removal rate is larger than or equal to 95%, the mineralization rate is larger than or equal to 80%, and the method is remarkably superior to the prior art and suitable for large-air-volume and low-concentration hydrophobic VOCs treatment.

The invention relates to a filter (100) for filtering aerosol-bound viruses and bacteria from respiratory gases, comprising a housing with a first user-side housing shell (110) and a second machine-side housing shell (120), wherein the first housing shell (110) comprises a mouthpiece (111, 150) and the second housing shell (120) comprises a connection nozzle (121) for a medical device or measuring instrument, and a filter pad (130) arranged between the first housing shell (110) and the second housing shell (120), wherein the first or the second housing shell (110, 120) has spacer or clamping elements (140) which contact the filter pad (130), and wherein the spacer or clamping elements (140) are further configured as isolated pins (142).

The utility model discloses a medical bacterial filter which comprises a shell, a filter layer is arranged in the shell, a dismounting opening is formed in one end of the shell, a dismounting frame is arranged in the dismounting opening, the filter layer is arranged in the dismounting frame, the dismounting frame is in sliding fit with the dismounting opening, a moving groove is formed in one end of the shell, and the moving groove is in sliding fit with the dismounting opening. A movable groove is formed in the shell, a positioning pin is arranged in the movable groove, a positioning groove is formed in the disassembly and assembly frame, the positioning pin is matched with the positioning groove, the number of the filter layers is two, the number of the disassembly and assembly frames and the number of the disassembly and assembly openings are also two correspondingly, the filter layers are located on the same side of the shell, a movable plate is arranged in the shell, and a control block is arranged on the movable plate. A sealing gasket is arranged on one side of the moving plate, a sliding opening is formed in the shell, and the sliding opening is matched with the control block, according to the equipment, the filtering structure is convenient to replace, the use of the equipment is not affected during replacement, and the use of the equipment is convenient.

The invention relates to a filter (100) for filtering aerosol-bound viruses and bacteria from respiratory gases, comprising a housing with a first user-side housing shell (110) and a second machine-side housing shell (120), wherein the first housing shell (110) comprises a mouthpiece (111, 150) and the second housing shell (120) comprises a connection nozzle (121) for a medical device or measuring instrument, and a filter pad (130) arranged between the first housing shell (110) and the second housing shell (120), the mouthpiece (150) having an upper wall (151) associated with the palate and a lower wall (152) associated with the tongue, wherein the upper wall (151) associated with the palate and the lower wall (152) associated with the tongue are designed differently from each other.

The utility model discloses a bacterial filter and relates to the field of medical machinery, the bacterial filter comprises a filter box, an air inlet pipe, an air outlet pipe, a medicine inlet, a filter element and a connecting pipe, the air inlet pipe and the air outlet pipe are respectively arranged at the upper end and the lower end of the filter box, the medicine inlet is arranged on one side, close to the air inlet pipe, of the filter box, and the filter element is arranged in the filter box; a first connector and a second connector are arranged at the two ends of the connecting pipe respectively, a locking assembly is arranged on the first connector, the first connector is connected with the air outlet pipe through the locking assembly, and the second connector is connected with an equipment pipeline. The connecting pipe is utilized, when the length of the equipment pipeline is small, the locking assembly on the first connector is used for connecting the air outlet pipe and the connecting pipe, the second connector is used for connecting the connecting pipe of the equipment pipeline, and therefore the bacterial filter can be conveniently connected with the equipment pipeline.

The invention discloses a bacterial co-culture device capable of promoting culture medium flow, and belongs to the technical field of bacterial culture.The bacterial co-culture device capable of promoting culture medium flow comprises a supporting frame, and a circulating shaking assembly is slidably connected to the interior of the supporting frame and used for promoting gas exchange and increasing the solubility of oxygen in a culture medium; meanwhile, an adjustable waveform disturbance assembly is installed in the circulating shaking assembly and used for simulating the wave type wriggling movement of the intestinal tract, and therefore periodic pressure is applied to the bottom of the silica gel film. The circulating shaking assembly and the adjustable waveform disturbance assembly are adopted, fluid is pushed through overall deformation of a flexible membrane, mechanical shear damage to bacterial cells caused by stirring blades rotating at a high speed is completely avoided, meanwhile, directional flow generated by traveling waves ensures that a culture medium solution can effectively penetrate through a bacterial filtering membrane, and the bacterial filtering effect is improved. Continuous nutrition exchange and signal molecule transmission are provided for bacteria on the two sides of the membrane, and the problem that the transmission efficiency is low due to the fact that molecules only depend on diffusion is solved.

The invention relates to a filter (100) for filtering aerosol-bound viruses and bacteria from respiratory gases, comprising a housing with a first user-side housing shell (110) and a second machine-side housing shell (120), wherein the first housing shell (110) comprises a mouthpiece (111, 150) and the second housing shell (120) comprises a connection nozzle (121) for a medical device or measuring instrument and a filter pad (130) arranged between the first housing shell (110) and the second housing shell (120), wherein the filter pad (130) is unfolded and formed with the pad geometry of a polygon.

This invention discloses a bacterial filtration device for medical vacuum negative pressure units, relating to the field of medical supplies technology. It includes a support frame installed inside an ultraviolet disinfection hood, with movable frames slidably installed inside two filtration chambers. A primary filter element is installed at equal intervals inside the upper movable frame, and a secondary filter element is installed at equal intervals inside the lower movable frame. Two working modules are installed on the side of the support frame, each including a drive mechanism, a switching mechanism, and a clamping mechanism. The switching mechanism is driven by the movable frame and drives it to slide. The clamping mechanism drives a pressing component to press the connecting pipe, causing the connecting pipe to shift and connect the air passage. This bacterial filtration device for medical vacuum negative pressure units achieves single-drive linkage switching and clamping mechanism operation through the working modules, automatically switching filtration positions and sealing the air passage. Simultaneously, a trigger mechanism monitors filter element lifespan, supporting online filter replacement without shutting down the system.

The utility model discloses a portable medical molecular sieve oxygen generator, which relates to the technical field of molecular sieve oxygen generators and comprises a shell and a blocking component. A filtering tank is fixed in the shell, a filter element is arranged in the filtering tank, a connecting pipe is fixed in an air inlet formed in the lower end of the surface of the filtering tank, a first three-way pipe is fixed in an air outlet formed in the upper end of the surface of the filtering tank, and two corresponding molecular sieves are fixed in the shell; two ports, far away from the filtering tank, of the first three-way pipe are fixed in two air inlets formed in the lower ends of two molecular sieves, a second three-way pipe is fixed in air outlets formed in the upper ends of the two molecular sieves, and a bacterial filter is mounted at the left end of the upper side in the shell; one end, far away from the two molecular sieves, of the second three-way pipe is fixed in the air inlet of the bacterial filter, so that the filter element can be very conveniently replaced.

The utility model discloses a special medical vacuum negative pressure unit structure for an infected building, which comprises a box body, a vacuum pump is mounted in the box body, an air inlet of the vacuum pump is fixedly communicated with an air inlet pipe, one end of the air inlet pipe is positioned outside the box body, a mounting plate is fixedly connected in the box body, a vacuum tank is fixedly connected onto the mounting plate, and the vacuum tank is fixedly connected onto the vacuum tank. A quick-clamping type flexible corrugated pipe is fixedly communicated between the vacuum tank and an air inlet of the vacuum pump, and an air outlet pipe is fixedly communicated with the vacuum tank. The vacuum negative pressure unit disclosed by the utility model is more integrated, smaller in occupied space, lighter in weight, low in cost, convenient to install and maintain, and capable of buffering sucked air, so that the bacterial filter and the disinfection box can be prevented from being damaged due to high-pressure impact, the operation stability of the vacuum negative pressure unit is effectively improved, and the service life of the vacuum negative pressure unit is prolonged. And the load of the bacteria filter and the disinfection box in unit time can be reduced, so that the purification effect of the medical vacuum negative pressure unit can be improved.

The utility model discloses a novel dental electric suction system, including a mercury collector, a dirt separator, a bacteria filter, a gas discharge disinfection system, a liquid circulation system, a wet negative pressure pump group, a dry negative pressure pump group, an electric control box, a department negative pressure pipeline, a negative pressure pump group suction pipeline, a negative pressure pump group exhaust pipeline, a check valve, a manual ball valve and a tank cleaning disinfectant. The utility model utilizes a wet negative pressure pump group and a dry negative pressure pump group to generate suction, so that water vapor enters from the department negative pressure pipeline, and is finally discharged after filtering and disinfection in the middle. The advantages of the wet negative pressure pump group and the dry negative pressure pump group are combined with each other to make up for each other's shortcomings, and solve the problems of high energy consumption, high noise, insufficient vacuum and insufficient flow of the traditional dry suction negative pressure system, thereby reducing the requirements for the thickness of the negative pressure vacuum pipeline, easy heat generation, easy to burn the motor when the load is large, and also solves many problems such as water and gas mixing together when the wet suction negative pressure system discharges sewage.

The present invention relates to an ultrafiltration membrane for removing viruses and bacteria, and a manufacturing method therefor, and, more specifically, to an ultrafiltration membrane for removing viruses and bacteria, comprising: (a) a porous polymer support membrane; and (b) a cross-linked and positively-charged coating layer formed on both the internal pores and the surface of the porous polymer support membrane. The ultrafiltration membrane has excellent disinfection and turbidity removal performance and can be applied as a viral and bacterial filter.

The invention relates to the technical field of DNA preservation, in particular to a compound preservation solution for normal-temperature preservation of wild protected animal excrement DNA and a preparation method of the compound preservation solution. The composite preserving fluid is prepared from polyethylene glycol PEG200, EDTA (Ethylene Diamine Tetraacetic Acid), TCEP-HCl, NaCl, Tris, glycerol and a bacteriostatic agent, the preparation method comprises the following steps: S1, adding a proper amount of ultrapure water into other components except the bacteriostatic agent and TCEP-HCl in the formula of the composite preservation solution, dissolving and mixing to obtain a first mixed solution; s2, performing high-pressure steam sterilization on the first mixed solution, and cooling at room temperature; s3, filtering and sterilizing a bacteriostatic agent and TCEP-HCl through a bacterial filter, adding the cooled first mixed solution, and mixing; s4, adjusting the pH value to 7.0-8.0 by using NaOH prepared from sterile ultrapure water, and fixing the volume by using the sterile ultrapure water; and S5, sub-packaging the composite preserving fluid with the constant volume into a sterile, enzyme-free and heat-source-free 50mL centrifugal tube, and preserving in a shade place in a dark place. The invention provides a reliable technical scheme for normal-temperature preservation and transportation of wild protected animal excrement DNA samples in field investigation.

The present invention discloses a novel portable device for monitoring sampling by endoscopic membrane filter method, including a portable device containing an endoscopic monitoring sampler, an endoscopic bacterial filter, an endoscopic sampling liquid collection sterilization bottle and a portable sampling box. The portable device containing an endoscopic monitoring sampler includes a sterilizing filter cup (the bottom of the cup contains a filter membrane), a sterilizing connecting pipe and an endoscopic connecting port. The sterilizing filter cup is split, and the middle of the sterilizing filter cup is connected to the endoscopic sampling liquid collection sterilizing bottle body through a lower threaded ring during filtering, and a soft plug cover is provided at the bottom of the sterilizing filter cup. The filter membrane can be taken out by unscrewing the upper threaded ring in the middle of the sterilizing filter cup. One end of the sterilizing filter cup is provided with a liquid inlet and a liquid outlet, and the portable sampling box includes a peristaltic pump placement area, a filter rack placement area, a sampler, a filter, a collection sterilizing bottle and other placement areas. The portable device for monitoring sampling by endoscopic membrane filter method of the present invention has the characteristics of simplified structure, easy to carry, easy to operate on site, more targeted and integrated.

The utility model relates to the technical field of virus filtering devices, and provides a bacteria filter for a respiratory system, which comprises an outer protective shell, a closing cover is clamped on one side of the outer protective shell, through holes are formed in the side surfaces of the outer protective shell and the closing cover, a filter element protection component is arranged in the outer protective shell, and a filter element is arranged in the filter element protection component. The filter element protection assembly is arranged in the shell, the two sides of the filter element protection assembly are connected with gas transmission assemblies in a clamped mode, a virus filter cylinder is arranged in the filter element protection assembly, the filter element protection assembly comprises a first protection shell, the first protection shell is rotationally connected with a second protection shell through a hinge, and one end of the first protection shell and one end of the second protection shell are each provided with a closing piece. Through the arrangement of the outer protection shell, the filter element protection assembly, the gas transmission assembly and the virus filter cylinder, in the using process, the bacteria filter for the respiratory system is low in overall manufacturing cost, can be produced in a large-scale and batch mode, and is small in size, capable of being carried at any time and convenient to use compared with a large filtering device.

The invention discloses an intelligent dialysis machine replacement liquid pipeline installation and detection device, and relates to the technical field of medical instruments, the intelligent dialysis machine replacement liquid pipeline installation and detection device comprises a retention pot, the top end of the retention pot is movably connected with a cover plate, the bottom of the retention pot is fixedly connected with an eduction tube, and the cover plate is fixedly connected with an induction tube and a replacement liquid induction tube. A guide-in groove is formed in the cover plate, and the replacement liquid guide-in pipe is communicated with the interior of the retention pot through the guide-in groove. When the liquid level in the retention pot rises, the sealing plug can gradually move upwards along the sliding rod under the action of buoyancy until the sealing plug enters the guide-in groove, blockage is formed, the possibility of blood backflow is reduced, meanwhile, the warning mechanism gives an alarm to remind medical staff to take measures in time, blood backflow is avoided, and the medical staff can be prevented from being injured. The inside of the blood filter and a bacterial filter are polluted by blood, and the dialyzer is coagulated and ruptured in membrane, and the like.

The invention discloses a low-energy-consumption method for extracting lysozyme from egg white. The method comprises the following extraction steps: S1, pre-treating egg white; s2, adjusting the pH value; s3, heating: treating the obtained egg white liquid at different temperatures; s4, adding polyethylene glycol of which the molecular weight is 10000-20000 into the egg white liquid, uniformly stirring, centrifuging, and collecting precipitate; s5, redissolving the precipitate, adding polyethylene glycol with the molecular weight of 200-8000 into the egg white liquid, uniformly stirring, centrifuging, and collecting supernate; s6, performing ultrafiltration and concentration, and removing salt, water and small molecular protein; s7, filtering bacteria by using a bacteria filter; s8, purifying by using a protein purifier; and S9, drying the lysozyme obtained by purification to obtain lysozyme powder. The method is simple and easy to implement, low in price and suitable for large-scale industrial production, the egg white is not changed, the quality is kept, and the egg white liquid in the extraction process can be recycled.

The utility model discloses a vacuum suction system for waste anesthetic gas in an operating room. The vacuum suction system is characterized in that a plug-pull type self-sealing quick-plug terminal mechanism is connected with a dirt liquid storage tank mechanism through a No.4 vacuum tube; the dirt liquid storage tank mechanism is connected with the bacteria filter mechanism through a No.6 vacuum pipe; the bacterial filter mechanism is connected with the dry-type rotary vane vacuum pump mechanism through a No.9 vacuum pipe; the dirt liquid storage tank mechanism is connected with the disinfection water tank through a No.17 vacuum pipe, and the PLC control box is in wireless connection with the plug-pull type self-sealing quick-plug terminal mechanism, the dirt liquid storage tank mechanism, the bacterial filter mechanism, the dry type rotary vane vacuum pump mechanism and the disinfection water tank. According to the operating room waste anesthetic gas vacuum suction system, the whole system is full-automatic and unattended, the technology is advanced, and the reliability is high.

The utility model relates to the technical field of medical instruments, and particularly discloses a labor-saving bacteria filter tube and a filter tube assembly, the labor-saving bacteria filter tube comprises a barrel body, a cover body, a plunger assembly and a micron filter membrane, an inlet and an outlet are respectively formed in the head end and the tail end of the cylinder body; the cover body is configured to be detachably connected with the cylinder body, and the cover body is used for covering the inlet; the plunger assembly is configured to be in threaded connection with the cover body, so that the stroke of the plunger assembly is regulated and controlled through rotation; the micron filter membrane is arranged in the cylinder body; the plunger assembly is configured to be used for promoting to-be-filtered materials in the barrel to pass through the micron filter membrane and then be discharged from the outlet; a connecting clamping groove is formed in the tail end of the barrel, and the outlet is located in an area defined by the connecting clamping groove. The labor-saving bacteria filter tube adopts a rotating structure to push and press a solution, so that time and labor are saved, the experiment efficiency is improved, and the condition of hand ache caused by long-time extrusion of an operator is prevented.

The humidifying cup adapter structure comprises an adapter body and bacteria filtering cotton, a first air inlet and a second air inlet are formed in the adapter body, an air outlet pipe is arranged on the adapter body, and the bacteria filtering cotton is arranged on the adapter body and located between the first air inlet and the second air inlet. And the bacteria filtering cotton is detachably connected with the joint body. According to the humidifying cup adapter structure of the oxygen generator, the bacterium filtering cotton is arranged between the first air inlet and the second air inlet and is close to the humidifying cup, oxygen is filtered by the bacterium filtering cotton and then enters the humidifying cup to be humidified, and bacterium filtering is carried out on the oxygen on the humidifying cup closest to a nasal plug oxygen uptake tube or an oxygen uptake nasal mask. As the bacteria filtering cotton is detachably connected with the connector body, a user can replace the bacteria filtering cotton very conveniently.

The utility model discloses a device for culturing bacteriophages, and relates to the technical field of microorganism culture. The device comprises a container cover, a container, a sample inlet pipe and a sample outlet pipe, the container is in airtight connection with the sample inlet pipe and the sample outlet pipe respectively; the container cover is detachably connected with the opening of the container in an airtight manner; a through vent hole is formed in the container cover; the sample inlet pipe and the sample outlet pipe are respectively communicated with the inner side and the outer side of the container, and a sample inlet pipe port is higher than a sample outlet pipe port on the inner side of the container; an air filter membrane is arranged in the air vent, the sample inlet pipe is provided with a bacterial filter, and a sealing plug is detachably mounted at a port, outside the container, of the sample outlet pipe. By adopting the device, when the phage type is replaced, the experiment does not need to be terminated, and the culture can be continued by continually supplementing a fresh culture medium and phage suspension from the sample feeding pipe, so that the continuity of phage culture and screening is realized until the phage capable of splitting target bacteria is screened out.

The utility model discloses an oxygen storage tank and a portable oxygen generator, and relates to the technical field of oxygen storage tanks, the oxygen storage tank comprises a tank body, a tank cover and a bacterial filter; the tank body is of a cylindrical structure with one open end, the tank body and the tank bottom of the tank body are in smooth transition, the tank cover is arranged at the open position of the tank body, and the tank cover and the tank body of the tank body are in smooth transition; the bacterial filter is located in the tank body, is fixedly arranged on a tank body of the tank body, and is used for filtering particle impurities in produced oxygen. According to the oxygen storage tank, the tank body is of the straight cylindrical structure, the tank body and the tank bottom of the tank body are in smooth transition, the tank cover and the tank body of the tank body are in smooth transition, when the oxygen storage tank bears pressure, the pressure is evenly distributed, pressure concentration can be prevented under the same pressure, and leakage caused by the conditions of breakage, deformation and the like of the oxygen storage tank can be effectively avoided. The bacteria filter is arranged in the tank body, so that the occupied space can be reduced, the overall structure is more compact, and the oxygenerator is smaller in size and more portable. The oxygen generator can generate the same technical effect.

The utility model discloses a universal bacteria filter cartridge, which comprises a base, a middle frame, an upper cover and a filter membrane, the upper cover is sleeved at the upper end of the middle frame, the lower end of the middle frame is inserted in the base, and the filter membrane is fixedly arranged in the base, the universal bacteria filter cartridge is characterized in that a first notch is arranged at the upper end of the base, and a second notch is arranged at the lower end of the middle frame. A first notch is formed in the upper end of the base, a second notch is formed in the lower end of the base, the filter membranes comprise a first filter membrane fixed in the first notch and a second filter membrane fixed in the second notch, first cotton paper is arranged on the lower portion of the first filter membrane, and second cotton paper is arranged on the upper portion of the second filter membrane; and the aperture of the filter holes of the first filter membrane is different from that of the filter holes of the second filter membrane. According to the utility model, the filter membranes with different apertures are arranged, so that the universality can be greatly improved.

In one aspect, the present disclosure provides a water purification system that includes a water inlet, a bacterial filter downstream of the water inlet, a fluid outlet downstream of the bacterial filter, and a source of a cleaning fluid in fluid communication with an inlet of the bacterial filter to provide the cleaning fluid upstream of the bacterial filter.

The invention discloses a car ventilation opening antibacterial filtering device which comprises a car body and a car lighting lamp fixedly connected to the center of the inner side of the top of the car body, a ventilation groove is formed in the car body, a filtering unit frame is embedded in the ventilation groove, and an antibacterial filtering unit is arranged in the filtering unit frame; an ultraviolet sterilization assembly used for conducting sterilization treatment on air flowing through the ventilation groove is further arranged on the lift car body. The filtering unit frame is detachably fixed to the lift car body through a rapid locking mechanism, the rapid locking mechanism comprises a positioning plug pin arranged on the filtering unit frame and a positioning pin hole formed in the lift car body, and the positioning plug pin can be inserted into the positioning pin hole to achieve preliminary positioning. And through the combination of multiple filtration and sterilization, the convenient disassembly and assembly structure design and the optimized layout, the air purification effect in the lift car, the maintenance convenience and the operation stability are effectively improved.

This utility model discloses a bacterial filtration structure for a medical vacuum negative pressure unit, relating to the field of medical vacuum negative pressure equipment technology. The utility model includes a base, with several lifting sleeves fixedly connected to the top outer wall of the base. Each of the lifting sleeves has a lifting groove on its inner wall. By incorporating convex shafts, the utility model allows for clockwise rotation of a handle, which in turn drives a worm gear, which in turn drives a worm wheel, which in turn drives a transmission rod. The transmission rod then drives one end of each of the convex shafts to rotate, which in turn drives one end of a connecting rod to move. This connecting rod then drives an extension rod to move upwards, which in turn raises a fixed base. The fixed base then drives several racks to rise, thus achieving a height that can be freely adjusted to accommodate varying heights in different environments and ventilation systems with different elevations, thereby improving the equipment's versatility.