2138results about How to "Reduce noise" patented technology

The invention belongs to the field of plastic product production, and particularly relates to a composite material for preparing a textile dyeing tube. The composite material mainly comprises the following components in parts by weight: 10 parts of PET resin, 10 parts of ASA resin, 1-6 parts of matt master batches, 1-3 parts of titanium dioxide, 1-2 parts of rosin, 0-1.5 parts of an antioxidant, 0-1 part of a fire retardant and 1-2 parts of a lubricating agent, wherein titanium dioxide is rutile titanium dioxide. Compared with the prior art, the components are good in compatibility; the molded product has excellent physical and mechanical properties, low glossiness, high strength (caused by titanium dioxide) and good tenacity, and is suitable for injection molding of plastic products; the metallic luster caused by titanium dioxide can be reduced; the noise can be reduced; titanium dioxide can be used for disinfecting under irradiation of an ultraviolet lamp; the composite material is very convenient; and the lubricating agent is added, so that the surface is relatively smooth.

The utility model discloses a bed body frame of a seedling raising bed, which is used for placing hole trays for seedling raising and comprises a plurality of cross beam section bars, a plurality of supporting pipe columns and connecting rods, the cross beam section bars are arranged in parallel, the supporting pipe columns are also arranged below the cross beam section bars vertically, and the connecting rods are connected with the cross beam section bars. The adjacent supporting pipe columns are connected through the connecting rods. Each cross beam sectional material comprises a cross plate and a separation part, the separation part is vertically arranged on the upper surface of the cross plate, a sliding groove is formed by the separation part and the upper surface of the cross plate, and the hole tray is placed on the sliding groove of the adjacent cross beam sectional material and can slide in a reciprocating mode along the sliding groove. The hole tray is simple in structure, high in strength, high in precision, good in stability and capable of enabling the hole tray to slide smoothly in the sliding groove.

The invention provides a unified context and multi-level memory cooperation system and method for an LLM agent, and belongs to the field of artificial intelligence. The system comprises a unified context module which is used for aggregating and structuring all input information required for organizing agent operation, and providing an integrated context view for an LLM agent core; the LLM agent core is used for executing task planning, tool calling, result evaluation and response generation based on the context provided by the unified context module; and the multi-level memory system is connected with the unified context module and the LLM agent core and is used for hierarchically storing, managing and feeding back experience and knowledge of the agents. According to the method, the problems that an existing LLM intelligent agent is limited in context, low in memory efficiency and lack of self-correction capacity are solved, and the intelligent level and reliability of complex task processing are remarkably improved.

The invention relates to the technical field of motors, in particular to a magnetic self-centering motor assembling method which is applied to a motor and comprises the following steps: forming a rotor assembly; a rotor assembly is rotatably and preliminarily installed on a base through a rotating shaft assembly, an end cover is preliminarily installed on the base, a bearing chamber of the end cover supports an outer ring of a bearing on the rotating shaft assembly through a radial elastic supporting unit, and the radial elastic supporting unit allows the outer ring of the bearing to slightly and radially float; a driving current is applied to the stator assembly, so that the rotor assembly generates a rotation trend or rotates at a low speed, and the rotor assembly is driven to overcome the micro radial rigidity of the radial elastic supporting unit by utilizing the unbalanced magnetic pulling force of interaction between the rotor assembly and the stator assembly; and the rotation axis of the stator assembly is automatically adjusted to a position which tends to be coaxial with the central axis of the stator assembly. The method can actively compensate radial dimension chain errors and assembly deviations accumulated in the previous process.

The utility model relates to the field of air conditioner air outlet devices, in particular to a central air conditioner air outlet noise reduction device which comprises an air receiving barrel, a bucket-shaped air expanding cover, an air outlet cover, a noise reduction frame, an air direction guiding frame and a protection frame. A hopper-shaped air expanding cover is arranged at the lower end of the air receiving barrel, an air outlet cover is arranged at the lower end of the hopper-shaped air expanding cover, an embedded groove is formed in the end, away from the hopper-shaped air expanding cover, of the air outlet cover, and a noise reduction frame, an air direction guiding frame and a protection frame are sequentially arranged in the embedded groove. According to the air conditioner air outlet device, noise generated by airflow resonance is effectively reduced through the air expansion flow guide design of the hopper-shaped air expansion cover and the sound absorption cotton plate filling of the sound attenuation and noise reduction frame, airflow can be evenly and softly blown to a room through the design of the air direction guide frame, and the problems that airflow in a traditional air conditioner air outlet device is too strong and uneven in distribution are solved.

This invention provides a cup assembly for a food processor, including a cup body, a cup lid, and a processing component disposed within the cup body. It also includes a gearbox, which comprises a movably disposed clutch output shaft. When the clutch output shaft moves to a first position, it drives the processing component to output a first rotational speed; when the clutch output shaft moves to a second position, it drives the processing component to output a second rotational speed. The cup lid is installed in place, maintaining the clutch output shaft in either the first or second position. Furthermore, a food processor with the aforementioned cup assembly is provided. In the first position, the clutch output shaft outputs a first rotational speed to adapt to multi-functional cooking; in the second position, it outputs a second rotational speed to adapt to another multi-functional cooking method requiring a different speed. By changing the position of the clutch output shaft, the processing component can be replaced and the rotational speed can be automatically switched. Moreover, the output speed range is wide and the torque is high, avoiding stalling caused by high processing resistance.

The utility model discloses a disc brake traction machine with an anti-friction disc structure. A main shaft penetrates through a machine base and is connected with a traction wheel and a brake; the stator winding iron core and the rotor are both arranged in the machine base, and the rotor is arranged outside the stator winding iron core and connected with the main shaft. The first bearing and the second bearing are arranged between the machine base and the main shaft. The machine base is connected with a machine base end cover, the brake is arranged on one side of the machine base end cover, a first shock pad and a second shock pad are arranged on the main shaft and arranged on the two sides of a brake disc of the brake respectively, and an adjusting pressing plate is arranged on the side, close to the second shock pad, of the end of the main shaft. The first shock pad and the second shock pad are arranged on the two sides of the brake disc, meanwhile, the position of the brake disc on the main shaft is limited by adjusting the pressing plate, and the brake disc can be reset in the action process of the brake through the elastic force of the first shock pad and the elastic force of the second shock pad. And noise generated by friction between the brake disc and the engine base end cover and between the brake disc and the armature surface is greatly reduced.

The invention discloses a multi-layer semantic perception, distillation and semi-supervised cooperative training target detection method, and the method specifically comprises the following steps: constructing a data set: extracting a first part of images from image data, marking the first part of images to construct a supervised target detection data set, and taking the remaining images as an unmarked image data set, the data volume of the unlabeled image data set is greater than that of the supervised target detection data set; teacher model optimization: performing supervision training on the teacher model on the supervised target detection data set; constructing a teacher model, and executing self-distillation training on the teacher model; pseudo labels are generated for the unlabeled images through a teacher model, and adaptive screening is carried out based on confidence distribution; mapping a pseudo label to a strong enhanced sample through enhanced geometric transformation, carrying out semi-supervised training by using the strong enhanced sample and the pseudo label, and introducing a feature layer distillation constraint at the same time; optimizing a student model; and outputting the target detection model obtained through training.

The invention belongs to the technical field of tunnel construction, and particularly relates to tunnel new energy operation equipment and an energy consumption control method thereof.The tunnel new energy operation equipment comprises a crawler chassis, the crawler chassis is driven by a motor, an electric telescopic arm is fixedly installed on the surface of the crawler chassis, and an external cable is slidably connected to the inner wall of the electric telescopic arm; the external cable is used for being connected with a power grid to provide electric energy for operation equipment. According to the tunnel new energy operation equipment and the energy consumption control method thereof, by arranging the energy storage driving control mechanism and the rotary conductive mechanism, seamless switching and 360-degree continuous rotation operation of the equipment in a power grid direct supply mode and a battery power supply mode are achieved when the equipment is used, and waste gas pollution in a tunnel is fundamentally eliminated. The system has the characteristics of zero emission, low noise and high energy utilization rate, the direct electric charge and ventilation energy consumption are remarkably reduced, the comprehensive energy consumption is reduced, and a brand new green and efficient equipment solution is provided for tunnel construction.

The utility model discloses a kind of high-efficiency oscillation mechanism of full-automatic blood culture instrument, it is related to medical supplies technical field.The utility model includes oscillation component, the left of bottom plate is equipped with motor, the outer peripheral wall of round plate is uniformly fixed with boss, the right of round plate is equipped with arc spring, spring is close to the end plate of round plate one end with mounting plate fixed, upper boss is symmetrically fixed in the along edge of placing plate lower wall, the clockwise direction of two upper bosses is equipped with lower boss with bottom plate fixed;Fixed component includes the moving plate being equipped in the upper of limit disc, the lower wall of moving plate is fixed with elastic cotton.The utility model is placed in the culture bottle of placing plate by spring and boss under rotation state and realizes reciprocating rotation to realize oscillation, and by the cooperation of upper boss and lower boss, culture bottle reciprocating up and down movement further improves oscillation effect, realizes the efficient oscillation of culture bottle, by elastic cotton to culture bottle extrusion fixed, improve the stability of culture bottle when oscillating.

Embodiments of the present application provide a detector device including a photon detector and a multilayer reflector. The photon detector includes a substrate, an isolation structure in a first side of the substrate, a guard ring adjacent to the isolation structure and in the first side of the substrate, a sensor node in the first side of the substrate, the guard ring between the sensor node and the isolation structure, a shared node in the first side of the substrate, the shared node between the guard ring and the isolation structure, an isolation extension structure in a second side of the substrate opposite the first side, the isolation extension structure extending from the second side to the isolation structure. The multilayer reflector is on the first side of the substrate. Using the multilayer reflector can improve collection of photons in an avalanche region.

The utility model discloses a carrier and base noise reduction structure, including base and carrier, the base is equipped with the accommodation cavity, and the carrier sets up in the accommodation cavity, and can move in the accommodation cavity, be equipped with the noise reduction subassembly on the base and the carrier, the noise reduction subassembly includes the first elastic piece of setting on the base, and set up on the carrier and when the carrier moves to the limit position along the accommodation cavity, will contact with the second elastic piece of first elastic piece. The utility model discloses through with the traditional separate setting on the base or the elastic buffer unit of carrier is decomposed into two independent components of fixing in base and carrier respectively, when the base and the carrier collide, and the collision object becomes silica gel silica gel contact surface from the traditional silica gel metal / plastic contact surface, thereby reduces the heterophonic.

The utility model discloses a charging voltage regulation circuit and a mobile power supply. The charging voltage regulation circuit comprises a charging interface module, an input rectification filtering module, a synchronous rectification module, an output filtering module, a protocol control module and a flyback control module. Wherein the protocol control module is electrically connected with the flyback control module and the charging interface module, the flyback control module is electrically connected with the input rectification filtering module and the synchronous rectification module, the synchronous rectification module is electrically connected with the output filtering module, and the output filtering module is electrically connected with the charging interface module. The synchronous rectification module is configured to adjust the input voltage input into the rectification filtering module, and the input voltage is output to the charging interface module through the output filtering module. According to the utility model, the drain-source voltage and switching loss of the synchronous rectification MOS can be reduced, and the stability and efficiency of the system are improved.

The present application relates to the technical field of fan, and provides an evaporative fan, which comprises a rear shell, a front shell, a side shell, a fan wheel and a water curtain. The evaporative fan provided by the present application forms an air flow flowing into an air inlet, passing through the water curtain into an air duct cavity and being sent out from an air outlet when the fan wheel rotates forward. A plurality of air guide ribs are arranged on the front shell at intervals. The protruding height of the air guide ribs towards the fan wheel increases along the air flow direction in sequence. The air flow first impacts on the air guide rib with the smallest protruding height, part of the air flow is blown out from the air outlet, and the other part of the air flow impacts on the adjacent air guide ribs in sequence. The protruding height can block part of the air flow, so that the part of the air flow can be guided to blow out to the external environment from the air outlet, avoiding returning to the air duct cavity, so that the air volume of the evaporative fan sent out of the fan front shell by the fan wheel is more uniform, the cooling effect is greatly improved, the air flow interference is small, the noise is greatly reduced, and the comfort of use is improved.

This utility model relates to the technical field of filling equipment and discloses a material clamping and conveying acceleration device, including a fixed plate. An adjustable support plate and a movable pad are mounted on the top of the fixed plate. A height-adjustable connecting plate is mounted on the top of the support plate. Two adjustable support legs are mounted on the top of the movable pad. A motor mounting plate is fixedly mounted on the top of the support legs. A speed-regulating motor is fixedly mounted on the top of the motor mounting plate. A synchronous pulley is fixedly mounted on the drive shaft of the speed-regulating motor. This utility model accelerates the material by driving a synchronous belt with a speed-regulating motor, enabling the material to enter the cartoning machine at a stable and orderly rhythm. This completely solves the problems of material accumulation, compression, and jamming caused by speed mismatch at the cartoning machine inlet, ensuring the continuous, efficient, and stable operation of the packaging production line.

The application relates to the air conditioning technical field and discloses an indoor unit and an air conditioner. The indoor unit comprises a shell, an air duct formed in the shell, an air inlet and an air outlet, and the air duct is communicated between the air inlet and the air outlet; a heat exchanger located in the air duct; a cross-flow fan located in the air duct, the cross-flow fan comprising a motor; wherein a side wall of the air duct is provided with an exhaust passage communicated with the air duct, the shell is further provided with a heat dissipation passage, the heat dissipation passage is located outside the air duct and is communicated between the exhaust passage and the motor, and airflow in the air duct can flow to the motor through the exhaust passage and the heat dissipation passage. The airflow in the air duct has certain kinetic energy and temperature regulation, thereby providing continuous cooling effect for the motor, so that the heat dissipation efficiency of the motor is remarkably improved, and the service life of the motor is prolonged.

The utility model discloses a central air conditioning pipeline noise reduction assembly, including central air conditioning ventilation pipeline, the inside of central air conditioning ventilation pipeline is provided with central air conditioning ventilation pipeline, the inside of central air conditioning ventilation pipeline is provided with noise reduction assembly no.

This utility model discloses a magnetic drive motor and an air supply device, including a motor body, an inner rotor, an outer rotor, and a magnetic adjustment ring. The motor body includes a housing and a motor shaft, with the motor shaft extending out of the housing. The inner and outer rotors are coaxially arranged. The inner rotor is provided with at least one first magnetic element, and the outer rotor is provided with at least one second magnetic element. One of the inner and outer rotors is fixed relative to the motor shaft. When the motor shaft rotates, the other of the inner and outer rotors can rotate together through the force between the first and second magnetic elements. The magnetic adjustment ring includes a mounting bracket and multiple magnetic plates. The mounting bracket is made of non-magnetic material and includes a fixing part and a mounting part. The fixing part is connected to the housing, and the mounting part is located between the inner and outer rotors and surrounds the inner rotor. The multiple magnetic plates are mounted on the mounting part and arranged at intervals along the circumference of the mounting part. This application can improve the stability of the magnetic drive motor operation.

The utility model discloses a spiral conveyor for dry-mixed mortar preparation relates to dry-mixed mortar preparation equipment field. This spiral conveyor for dry-mixed mortar preparation, including fixed shell and transmission shaft, the transmission shaft is inserted in the fixed shell inboard, the fixed shell is including lower tank shell, first upper cover shell and second upper cover shell, and the lower tank shell inboard is connected with the positioning kit, the first upper cover shell is located lower tank shell top, the second upper cover shell is located lower tank shell top, and the first upper cover shell and second upper cover shell are located positioning kit both sides. This spiral conveyor for dry-mixed mortar preparation adopts split type fixed shell design, including lower tank shell, first upper cover shell and second upper cover shell, is connected through fixed clamping strip and reinforcing bolt, is convenient for installation and dismounting, is favorable to the maintenance and overhaul of equipment, and spiral wing board is provided with multiple groups and can be combined into complete spiral push material board, when partial spiral wing board is damaged, only needs to replace the corresponding damaged component.

The application relates to the technical field of vehicle bodies, and provides a back door and a vehicle. The back door provided by the application comprises a back door sheet metal assembly, a back door window frame surrounding a light transmission hole formed by the back door sheet metal assembly, and a sealing piece arranged on the back door window frame. The sealing piece has a first sealing part located on the outer side wall of the back door window frame, the first sealing part is arranged around the back door window frame, and the first sealing part can seal the gap between the back door window frame and the counter handle. The back door provided by the application can seal the gap between the back door window frame and the counter handle, can better improve the sealing quality of the back door in the vehicle, can reduce the noise entering the vehicle from the back door, and can improve the quality of the vehicle.

The application discloses a premixing noise reduction burner and relates to the technical field of burners. The premixing noise reduction burner comprises a burner body and a gas mixing structure. The burner body is internally formed with a first premixing chamber and a second premixing chamber. A first sound insulation plate is located between the first premixing chamber and the second premixing chamber. The burner body is provided with a second sound insulation plate opposite to the first sound insulation plate. The first sound insulation plate is provided with an ignition mechanism. The gas mixing structure is arranged in the second premixing chamber. The first premixing chamber and the second premixing chamber of the premixing noise reduction burner can be used for mixing air and gas. The first sound insulation plate and the second sound insulation plate can reduce the flow rate of the mixed gas, so that the mixed gas can be more fully mixed. Meanwhile, the first sound insulation plate and the second sound insulation plate can also reduce the noise of the mixed gas. Therefore, the premixing noise reduction burner can fully mix the air and the gas, stably burn the mixed gas and effectively reduce the noise of the mixed gas.

The utility model discloses a workpiece rotating device, including floor, the upper end fixed mounting of floor has the interface board, the upper end fixed mounting of interface board has the foot bolt, the upper end center fixed connection of foot bolt has the rodless cylinder, and the both sides fixed connection of rodless cylinder has the slide rail, the inside fixed of slide rail has and inserts the mouth, the upper end fixed connection of slide rail has the sliding block, and the inside fixed mounting of sliding block has the lock nail seat, the inside fixed mounting of lock nail seat has the fixed nail, the upper fixed mounting of sliding block has the receiving station, to solve the hosiery setting machine that the above -mentioned background art proposes is the equipment that is used specially for this craft, but the mechanism of setting machine mobile die carrier is the long strip shape structure, and the space is big to the longitudinal occupation, and the workpiece passes through the chain structure and drives the die carrier to move, and the chain structure is relatively complex, when the chain damage needs the maintenance, and the cost is higher, lead to the problem of hosiery production and maintenance cost increase.

The utility model provides a discharge tower for salt production, which comprises a feeder, a drying roller, a discharge tower and a heat source area, the feeder for feeding wet materials and the discharge tower for discharging dry materials are respectively arranged at the head end and the tail end of the drying roller, and the head end of the drying roller is communicated with the heat source area positioned obliquely below the drying roller; the discharging tower comprises a three-way valve, an air pipe, a discharging port, a tower body, a first air outlet and a second air outlet. Cold air and hot air in the cold air area and the hot air area are used as media, when the temperature of the tower body is high, the cold air enters the air pipe for cooling, and when the temperature of the tower body is too low, the hot air enters the air pipe for heating, so that the temperature of the tower body is maintained at 55-100 DEG C, dried edible salt particles cannot be damped, and the temperature of the edible salt particles is gradually reduced.

The utility model relates to a sewage pump, it relates to sewage pump technical field. It contains diaphragm pump, diaphragm pump has water inlet nozzle, water inlet, chamber, water outlet and water outlet nozzle that pass through in proper order, the chamber has the diaphragm of swing joint in, and the water inlet, chamber and water outlet inside between installation have the hose, install the casing on diaphragm pump, the casing inside swing joint has two block pieces for alternately blocking the water inlet, water outlet, and the buffer piece between block piece and hose is used for buffering the impact force of block piece to hose, install the drive assembly on the casing, and drive assembly is transmission connection with diaphragm, two block pieces. The utility model discloses through using buffer piece, can reduce the impact force of block piece to hose, not only can prolong the service life of hose, can also reduce the noise that block piece hits hose produces, and drive assembly works, and diaphragm and two block pieces synchronous coordination movement can reduce the generation of noise.

The utility model relates to the technical field of breathing machine fans, in particular to a fan volute structure for a breathing machine. The volute structure comprises an outer shell, a driving mechanism and a control part, the outer shell comprises an upper shell body and a lower shell body which are in butt joint, an air inlet is formed in the upper shell body, the upper shell body and the lower shell body are in butt joint, an air outlet is formed in one end of the outer shell body, an air cavity for communicating the air inlet and the air outlet is formed in the outer shell body, and the upper shell body is arranged in a concentric circle; the lower shell is not arranged in a concentric circle; the driving mechanism comprises a motor shell, a driving assembly, a fan blade piece and a first lower end cover, one end of the motor shell penetrates through the lower shell, the driving assembly is located in the motor shell, the rotating shaft is exposed out of the motor shell and connected with the fan blade piece, the fan blade piece is located in the air cavity, and the first lower end cover abuts against the motor shell and is connected with the lower shell; the control piece is contained in the first lower end cover, electrically connected with the driving assembly and externally connected with a power source. Efficient airflow conduction can be achieved, and the noise of the fan can be reduced.

The utility model relates to the technical field of steam vapor-liquid separation devices, and provides a steam vapor-liquid separation device with a silencing function under a negative pressure condition, which comprises a tank body device, a silencing device, a spraying device, a negative pressure device and a drainage device, the silencing device is arranged on the tank body device, one part of the silencing device is located in the tank body device, the spraying device is arranged on the negative pressure device, one part of the spraying device is located in the negative pressure device, and the drainage device is located outside the tank body device and communicated with the tank body device. According to the steam-liquid separation device with the noise reduction function under the negative pressure condition, steam is conveyed into the tank body device through the noise reduction device, the steam in the tank body device is cooled through the spraying device, the steam in the tank body device is rapidly discharged through the negative pressure device, the steam in the tank body device is sealed through the water drainage device, and the steam in the tank body device is discharged through the water drainage device. Therefore, noise is reduced, and steam leakage is isolated.

The utility model discloses a full-bore eccentric ball valve with a flow guide hole, which relates to the technical field of ball valves and comprises a valve body, a valve rod, a valve core and a sealing body, the flow guide hole is arranged on the valve core, sealing air bag rings are arranged on the valve core and positioned at openings at two ends of the flow guide hole, and an inflating component connected with the sealing air bag rings is arranged outside the valve core. A sleeve is arranged outside the valve element, the valve rod is rotationally connected to the sleeve, a reset spring is connected between the sleeve and the valve rod, and an extrusion piece used for extruding the inflation assembly is arranged on the valve rod. When the valve is opened, the two ends of the flow guide hole are sealed with the openings in the two sides of the valve body respectively, so that a medium is prevented from rushing into a cavity between the valve body and the valve element in the process of passing through the flow guide hole, vibration and noise generated by the valve in the medium circulation process are effectively reduced, and the service life of the valve is prolonged. And meanwhile, the flowing resistance of the medium can be reduced to a certain extent, and the stability of the medium passing through the valve is improved.

The present application relates to the technical field of clothes processing, and particularly provides a drying system and clothes processing equipment, aiming to solve the problem of poor stability of the compressor caused by the existing installation mode of the compressor. To this end, the drying system of the present application comprises a base, a heat pump module and a metal bracket, the base is formed with a drying air duct, the evaporator and the condenser of the heat pump module are both installed inside the drying air duct, and the metal bracket is located between the compressor of the heat pump module and the base and is fixedly connected with the compressor and the base. By additionally arranging the metal bracket between the compressor and the base, the contact area with the base is increased, so that the compressor is more stable, the compressor is more stably operated, and the metal bracket has high structural strength, which is more conducive to improving the stability of the compressor. In addition, the metal bracket can also play a certain buffering role, which is conducive to reducing the vibration of the base, thereby reducing the noise during equipment operation and improving the user experience.

The utility model provides a whole type tin forest tray surface plating equipment relates to tin forest tray plating technical field, including installation support, in the utility model, through the swing mechanism, translation mechanism and the coordinated operation of rotating mechanism, realized tin forest tray in the multidimensional motion control in the plating process, swing mechanism passes through the cooperation of transmission disc, sliding sleeve and sliding rod, converts the circular movement into the reciprocating swing of storage tank, makes the plating liquid multi -angle effect to tin forest tray surface, promotes the uniformity of plating layer, through the screw rod drive plating assembly horizontal removal, expands the plating range, need not manual adjustment work piece to complete large -area plating, rotating mechanism passes through the multistage reduction drive of gear and belt pulley, makes the tin forest tray stable rotation of placing dish drive, optimizes the contact angle of plating liquid and work piece surface, is applicable to the plating treatment of complex structure, three three -dimensional compound movement modes formed by the combination, breaks through the function limitation of traditional equipment, improves plating quality and efficiency greatly.

This utility model discloses a vacuum pump with vibration reduction and noise reduction functions, including a vacuum pump body, and a vibration damping base installed at the bottom of the vacuum pump body. The vibration damping base can reduce the vibration of the vacuum pump body during operation, thereby reducing the noise generated by the vibration of the vacuum pump body. A noise reduction shell is installed on the outside of the vacuum pump body, which can reduce the noise generated by the vacuum pump body during operation. An air filter device is installed at the air inlet of the vacuum pump body, which can filter the air entering the vacuum pump body. The air filter device consists of a filter device shell and a metal filter plate. The metal filter plate is inserted into the interior of the filter device shell through a filter plate insertion slot on the filter device shell. This structure makes the metal filter plate easy to disassemble and assemble, thereby facilitating quick cleaning of the metal filter plate.