76results about How to "Work quietly" patented technology

The invention aims to provide a humidifier with low working noise and a large vapor diffusion area. The humidifier comprises a case on which a water storing cavity, an air inlet and an air outlet are formed, wherein the air inlet and the air outlet are communicated through an air channel which is provided with a fan; an ultrasonic atomization device and a heating and vaporizing device are arranged in the case; the heating and vaporizing device consists of a heating water tank, a vaporizing cavity which is formed above the liquid level of the heating water tank, and an electric heating element; the ultrasonic atomization device consists of an ultrasonic water tank, an ultrasonic generating device and an atomization cavity which is formed above the liquid level of the ultrasonic water tank; the heating water tank and the ultrasonic water tank are communicated with the water storing cavity through the water channel; and the atomization cavity and the vaporizing cavity which serve as a part of the air channel are connected in series with the air channel. Provided with the ultrasonic atomization device and the heating and vaporizing device simultaneously, the humidifier works more quietly due to the unique air channel, the vapor diffusion area is enlarged under the condition of the same energy consumption, the practicability of the humidifier is improved, and requirements of customers are met.

The invention relates to a high-efficiency dissolved air flotation system which comprises an air flotation tank, a slag scraper, a slag discharge device, a water outlet device and an air-liquid mixing pump water inlet pipe, wherein the slag scraper, the slag discharge device and the water outlet device are arranged in the air flotation tank; the air-liquid mixing pump water inlet pipe is led out from the tail end of the air flotation tank, the air-liquid mixing pump water inlet pipe is provided with an air inlet pipe and connected with an air-liquid mixing pump and a microbubble generator through an air-liquid mixing pipe; a high-pressure saturated dissolved air water pipe led out from the microbubble generator and an external sewage inlet pipe are communicated with a dissolved air releaser positioned on the tail end of the water inlet pipe of the air floatation tank through a T-shaped mixer. Compared with the prior art, the high-efficiency dissolved air flotation system has the beneficial effects that dissolved air generated through the system is good in water stability and high in bubble density, microbubbles with grain diameters of about 5 micrometers and generated through the system are more easily adhered to suspended substances and oil droplets which are contained in sewage and a better removing effect can be achieved because the dissolved air ratio of dissolved air water inside the system can achieve 30%-35% and is simple in structure, easy to debug, stable in operation, stable and reliable in operation, conserved in energy, reduced in consumption and high in automation degree.

The invention discloses a street lamp utilizing recycled garbage to generate power for illumination, which comprises a lamp post and a luminous body arranged on the lamp post, wherein a control circuit electrically connected with the luminous body is arranged in the lamp post, the bottom of the lamp post is provided with a garbage recycling device, the garbage recycling device comprises a garbage can connected with the lamp post, and a garbage separating chamber and an anaerobic fermentation chamber which are arranged in the garbage can, a methane fuel battery electrically connected with the control circuit is arranged in the lamp post, the anaerobic fermentation chamber is communicated with a fuel inlet of the methane fuel battery through a pneumatic tube, and the garbage can is provided with a feed port communicated with the garbage separating chamber.

The invention relates to an air purifier installed on an ordinary street lamp pole. The air purifier comprises a street lamp pole, a cylinder-frame-shaped support arranged in match with the street lamp pole, a filtering mechanism and a power source mechanism. The filtering mechanism is arranged on the support in a sleeving mode. The filtering mechanism comprises a collector mechanism, a generation electrode mechanism and a filtering mesh, wherein the collector mechanism, the generation electrode mechanism and the filtering mesh are sequentially arranged from inside to outside. The filtering mechanism is sleeved with an air inlet hood. The support is fixedly arranged on the street lamp pole, and the street lamp pole is evenly provided with air holes. The filtering mechanism is connected with the power source mechanism through a wire. When the air purifier works, external air required to be purified enters the air purifier through the air inlet hood under the action of ionic wind generated by a generation electrode pole and is filtered by the filtering mesh firstly, then germ, formaldehyde and other harmful matter are oxidized or decomposed by plasma generated by the generation electrode pole, and particles are absorbed by collection electrode pieces along with electric charges; the collection electrode pieces can collect dust, killed cell debris and other harmful matter, the filtered air is discharged out of the air holes evenly distributed in the lower portion of the street lamp pole, and purifying processing is achieved.

The invention discloses an adjustable-speed noise reduction electric drill, which comprises an electric drill body. An electric drill bit seat is arranged at the head of the electric drill body, and an electric drill bit is arranged on the electric drill bit seat. The adjustable-speed noise reduction electric drill is characterized in that the electric drill bit seat is connected with a rotating motor through a rotating shaft, the rotating motor is arranged inside the electric drill body and connected with a resistance-type rotary speed controller, the resistance-type rotary speed controller is connected with a control switch arranged on a handle of the electric drill body, a silencer connected with the rotating motor and the resistance-type rotary speed controller is further arranged inside the electric drill body, a cooling device connected with the rotating motor is further arranged at the tail of the electric drill body, and a protective cover is arranged outside the cooling device. The adjustable-speed noise reduction electric drill has the advantages that the drilling speed of the electric drill can be adjusted by the resistance-type rotary speed controller, engineering quality is improved, noise in high-speed rotation of the electric drill is reduced by the silencer, and a quieter working environment is created for people.

The invention relates to a portable electric pruner. The portable electric pruner comprises a shell, a power device arranged in the shell, a transmission mechanism, an operating control device and a shearing device arranged at the front end of the shell; the shell comprises a left shell and a right shell which form a handle shape together; the shearing device consists of a small static blade assembly and a small movable blade assembly, and the small movable blade assembly comprises a movable blade and driving fan teeth; a static blade and the movable blade are arranged in a scissors shape, and the driving fan teeth are fixedly arranged at the rear end of the movable blade. The pruner is driven by adopting an electric mode, has an electrifying indicating function and can have multiple working modes capable of being randomly switched; and modular design is adopted in the pruner, so the pruner has low failure rate and is convenient to maintain.

The invention discloses a portable household electrostatic disinsection dust collector and belongs to the field of acarus killing and dust collection. The portable household electrostatic disinsection dust collector comprises a housing, a switch, a handle, a disinsection dust entry, a front rotary shaft, a rear rotary shaft, a plastic roll shaft, a transmission belt, a transmission cylinder, antistatic brushes, an electrostatic storage device, a dust collection box, a transmission rubber strip, a motor, a rechargeable battery, and a charge interface, the power supply rechargeable battery and the motor that is a power generator are disposed inside the housing, the motor transmits power to the transmission belt through the transmission rubber strip, the transmission belt rubs against the plastic roll shaft, generating static electricity and adsorbing acari and dust, and the adsorbed acari and dust are collected to the dust collection box through the antistatic brushes.

An intelligent temperature-control semiconductor cold-compress instrument is composed of a water cooling device, a heat-conducting bottom plate and a semiconductor refrigerating plate. The semiconductor refrigerating plate is arranged on the heat-conducting bottom plate, the refrigerating surface of the semiconductor refrigerating plate is attached to the heat-conducting bottom plate, and water cooling heads of the water cooling device are arranged on the heat-dispersing surface of the semiconductor refrigerating plate. According to the intelligent temperature-control semiconductor cold-compress instrument, the semiconductor refrigerating plate serves as a cold source, and an operator can control the working state of the cold-compress instrument through a human-computer interaction interface, so that the effect that the cold-compress temperature and time are adjustable is achieved. A temperature sensor is used for precisely controlling the cold-compress temperature. A cold-compress patch part of the cold-compress instrument is smaller in size and is attached to surface skin of an affected part through a silica gel sticking patch, and the advantages of conveniently observing the skin condition, meeting the requirement of small wound cold compress and the like are achieved. The cold-compress instrument does not need an external power supply and can be applied to hospital treatment and outdoor on-site rescue.

The invention relates to the technical field of punchers, in particular to a dried blood spot puncher and a punching method thereof. The dried blood spot puncher comprises a workbench, wherein a driving assembly and a punching assembly are arranged on the workbench; a test tube tray is in driving connection to the driving assembly; the punching assembly comprises a punching punch, a punching upperdie and a punching lower knife which are sequentially distributed from top to bottom; a gap is reserved between the punching upper die and the punching lower knife and is used for placing a blood spot acquisition card; a first punched hole is formed in the punching upper die; a second punched hole is formed in the punching lower knife; a punching needle is fixed on the punching punch and is in sliding fit with the inner wall of the first punched hole; the bottom end of the punching needle is in shearing fit with the second punched hole; and an air hole is formed in the central axis of the punching needle. After the dried blood spot puncher is used for punching, blood sheets can be blown into test tubes, and the blood sheets falling into the test tubes cannot fly out of the test tubes dueto the influence of air flow; and the dried blood spot puncher has the advantage of being quiet during working, is efficient and energy-saving, and is suitable for being used in medical places.

The invention relates to a bicycle vibration energy conversion mechanism and a bicycle adopting the same. The bicycle vibration energy conversion mechanism comprises a force transfer mechanism and a shell used for being arranged on a fixed frame of the bicycle, wherein one end of the force transfer mechanism is in transmission connection with a swing frame, capable of vertically swinging, of the bicycle; the other end of the force transfer mechanism is in transmission connection with a swing arm which is rotatably matched with the inner wall of the shell and is suitable for the swing arm to carry out reciprocating swinging; an arc-shaped surface tooth at the lower end of the swing arm is in transmission connection with an input gear which is located on the lower part and is rotatably matched with a fixed shaft; the input gear is in transmission connection with the inner end of a clockwork spring at the rear side by a ratchet wheel mechanism; the outer end of the clockwork spring is in transmission connection with a driven gear on a rotating shaft in a matching way by utilizing a bearing and a one-way clutch provided with gear teeth on the outer side face; the driven gear is suitable for being in transmission connection with the rotating shaft; and the end part, stretching out of the shell, on the rotating shaft is suitable for being fixedly connected with a chain wheel used for driving a driving wheel of the bicycle. The bicycle vibration energy conversion mechanism is capable of accumulating vibration energy and then outputting the vibration energy to wheels so as to drive the bicycle to advance.

The invention provides a bionic flytrap driven by shape memory alloy (SMA) wires, and the flytrap belongs to the technical field of robots and aims to solve the problems the driving current which is required by an existing bionic flytrap robot is quite high, the use is not convenient and the like. The left blade (2) of a flytrap clamp and the right blade (5) of the flytrap clamp are arranged on a support (1); a group of reverse bending units (3) driven by the SMA wires are respectively inlaid in the left blade (2) of the flytrap clamp and the right blade (5) of the flytrap clamp; a fly sensing device (6) is arranged between the left blade (2) of the flytrap clamp and the right blade (5) of the flytrap clamp; the two groups of reverse bending units (3) driven by the SMA wires act simultaneously so as to drive the left blade (2) of the flytrap clamp and the right blade (5) of the flytrap clamp to be folded and contract so as to trap a fly into the flytrap clamp. According to the bionic flytrap driven by SMA wires, the fly trapping principle of the flytrap is simulated, an automatic flytrap device which is applicable indoors is provided, and the bionic flytrap has a compact and simple structure, and is convenient to use.

A compact hard disk drive that operates silently at a low power consumption needs a suspension assembly that places a low load on the magnetic head. A suspension assembly 104 comprises a head arm 10 mounted on a carriage shaft 105, a load beam 20 capable of placing load on a magnetic head 3 and serving as a beam, and a flexure assembly 30. The flexure assembly 30 includes a flexure 31 formed by processing a thin metal sheet, an insulating layer 32 laminated to the flexure 31, a wiring pattern 33 formed on the insulating layer 32, and a protective layer 34 coating the wiring pattern 33. The flexure 31 has a flexible part 310 for placing load on the magnetic head 3, a gimbals 311 to which the magnetic head 3 is attached, and a base part 312 attached to the head arm 10. The elastic part 310 of the flexure 31 generates a very load in the range of about 0.1 to about 1 g.

The invention relates to a coupling for connecting construction parts, a truss provided therewith and associated method and use. The coupling comprises a female and a male coupling part. The female coupling part comprises: a tubular receiving part, in the wall of which an opening is provided; a ball which is placed in the opening and which is movable in radial direction of the receiving part; anda locking sleeve which is screwed onto and encloses the receiving part and which by being screw ed is movable in the longitudinal direction of the receiving part between an opened position, in which the locking sleeve allows movement of the ball in the opening for the purpose of placing / removing the male coupling part into / from the receiving part, and a closed position in which the locking sleevelocks the male coupling part in the female coupling part with the ball, wherein the male coupling part is an elongate pin which comprises in its outer wall a groove for the ball.

The invention provides an air opening device and an air conditioner unit. The air opening device comprises a shell and a noise reduction cover. An air cavity is formed in the shell; an air inlet and an air outlet communicating with the air cavity are formed in the shell; the noise reduction cover is arranged in the air cavity and is located between the air inlet and the air outlet; and a noise reduction hole is formed in the noise reduction cover and is used for circulating an airflow from the air inlet to the air outlet and absorbing noise. By applying the technical scheme of the invention, the noise reduction cover is arranged in the air cavity of the shell, so that the airflow from the air inlet to the air outlet passes through the noise reduction cover; and the noise reduction hole onthe noise reduction cover has a function on circulating the airflow, and can be used for absorbing noise spread from the air inlet to the air outlet at the same time, so that motor noise, fan noise and airflow noise spread through an air pipe and secondary noise produced by airflow circulation in an air supply system of an air conditioner unit are effectively eliminated, the air supply noise of the air conditioner unit is effectively reduced, and people can work and take a rest under the quiet and healthy environment.

The invention provides a variable-frequency range hood. The variable-frequency range hood comprises a fan motor, a motor power supply module and a power supply plate; the power supply plate is provided with a fan motor power supply interface; the variable-frequency range hood is characterized by further comprising a controller and a storage module which are supplied with power by the power supplyplate; the storage module is used for storing data which is to be read by the controller; the motor power supply module comprises a mains supply and a frequency converting module, wherein the frequency converting module is used for converting the frequency of the mains supply into a specified frequency under the control of the controller. The variable-frequency range hood provided by the inventionhas the advantages that the range hood realizes frequency conversion by virtue of the frequency converting module which is combined with the mains supply; relatively power-wasting speed regulating windings need not to be connected in series for speed regulation in a frequency conversion process; a relatively high frequency conversion efficiency is realized; moreover, the frequency can be converted rapidly to realize the regulation of the range hood within a larger rotating speed range, so that the requirement of small-air-volume soup cooking of a user and the requirement of a high-rotating-speed large air volume for a public flue in stir-frying can be satisfied; under a severe working condition, the rotating speed of the motor can be greatly regulated in order to prevent escaping of the smoke; and under a less-smoke condition, the variable-frequency range hood can run at a relatively low frequency, thereby reducing the energy consumption of the overall range hood and improving the user experiences.

The invention concerns a pair of saw blades, including a first blade (1) and a second blade (2), which are arranged to rotate around the same rotational axis in opposite directions. Each of the blades (1, 2) has its own blade body (3, 4) and peripheral cutting elements (5, 6), wherein the blade body (3) of the first blade (1) has a front side, which is turned towards a back side of the blade body (4) of the second saw blade (2), and wherein the cutting elements (5, 6) form overhangs (9, 10) protruding from said front or back side. Said front and / or back side have / has a circumferential ridge (11), which is arranged peripherally inside of the cutting elements (5, 6) and to slide over a corresponding part or a corresponding ridge (11) on the opposite back side and / or front side, wherein the ridge / ridges (11) is / are made in one piece with the blade body (3, 4) in question and serves / serve as a spacer means to prevent the cutting elements (5, 6) with their overhangs (9, 10) to hit each other during rotation of the blades (1, 2).

The invention relates to the technical field of cutting machines, in particular to a cutting device of a horizontal fabric cutting machine. The cutting device comprises a machine base, a motor, a transmission wheel and a disc blade. The motor is installed on the machine base. The transmission wheel is arranged on the machine base in a rotating mode. The motor drives the transmission wheel to rotate. The transmission wheel drives the disc blade to rotate. The disc blade is installed on a swing mechanism. The swing mechanism drives the disc blade to swing up and down periodically. The disc blade can be rapid in cooling, good in cooling effect and capable of being prevented from being attached to fabric; meanwhile, cutting can be conducted horizontally and vertically, the cutting efficiency and the cutting effect are greatly improved, and a good cutting effect is still achieved even through the blunt disc blade.

The invention belongs to the related technical field of mercury control in coal-fired flue gas and discloses an efficient demercurating adsorbent spraying device which comprises a primary spray barrel and a cyclone, wherein an accommodating cavity is formed in the primary spray barrel, and two rows of nozzles which are arranged along two length directions of the primary spray barrel are formed in one end of a flue of the accommodating cavity, separately; the cyclone is accommodated in the accommodating cavity and is located out of the flue; air entering the accommodating cavity from one end, far from the flue, of the primary spray barrel separately forms straight flow air and spiral air through the cyclone, and the straight flow air and spiral air are used for driving an adsorbent entering the accommodating cavity to move spirally downward and the adsorbent is sprayed out from the nozzles to be mixed with flue gas for demercuration. The adsorbent spraying direction is not a single flue gas flowing direction, so that disturbance of the adsorbent is enhanced, the turbulence intensity is enhanced, the demercurating efficiency is increased, and the device is simple in structure and quiet during working.

The invention relates to a motor-driven pressing machine. The motor-driven pressing machine comprises a machine base, a pressing device and a controller, wherein the pressing device comprises an upperpressing plate and a lower pressing plate, the lower pressing plate is fixed to the machine base, the middle of a rocker is in pivot connection with the machine base, the upper pressing plate is arranged at the front end of the rocker, and the rear end of the rocker is connected with a driving mechanism through a connection rod. The driving mechanism comprises a driving motor, a worm reducer andan output arm, the driving motor is arranged on the machine base, the output end of the driving motor is connected with a worm rod of the worm reducer, the lower end of the output arm is fixedly connected with a worm output shaft of the worm reducer, the upper end of the output arm is hinged to the lower end of the connection rod, the upper end of the connection rod is hinged to the rear end of the rocker, and the controller controls the driving motor and the upper and lower pressing plates to work. The motor-driven pressing machine is driven by the direct current motor, and the motor-driven pressing machine has the advantages that the structure is more compact, the shape is more attractive, the cost is reduced, and more convenience is brought.

The invention provides a steering gear and holder equipment with the same. The steering gear comprises a shell, a driving motor and a transmission structure. A first mounting space and a second mounting space are formed in the shell. The driving motor is mounted in the first mounting space. An output shaft of the driving motor extends into the second mounting space. The transmission structure is mounted in the second mounting space, and comprises a motor gear, an intermediate transmission gear set and an output gear which are meshed sequentially in a speed reduction mode. The motor gear is arranged on the output shaft of the driving motor, and is driven to rotate synchronously by the output shaft of the driving motor. The motor gear and the intermediate transmission gear set are meshed inhelical tooth mode. By the steering gear, the technical problem of non-ideal mute effect of the working state of the machinery equipment with the steering gear due to large noise generated during working of the steering gear in the prior art can be solved.

The invention relates to a hopper type mucking loader for a narrow-roadway mine shaft. The hopper type mucking loader comprises a traveling chassis, a cab, an ore conveying device, a retractable shovel opening, a control unit and a working device, wherein the cab, the ore conveying device, the retractable shovel opening, the control unit and the working device are mounted on the traveling chassis. The front end of the ore conveying device and a frame of the traveling chassis are hinged together, the rear end of the ore conveying device is supported by two synchronously-telescoping hydraulic cylinders, the retractable shovel opening is mounted at the front end of the ore conveying device, the working device is positioned on the frame of the traveling chassis, the control unit is mounted in the cab, the input end of the control unit is connected with a handheld operation handle, and the traveling chassis, the ore conveying device, the retractable shovel opening and the working device are connected with the output end of the control unit. The hopper type mucking loader for the narrow-roadway mine shaft has the advantages that ore conveying efficiency is improved, service life of the mucking loader is prolonged, traveling and position transferring of the mucking loader in a narrow roadway are facilitated, an operator can observe working sites conveniently, and the cab can be distant from the mucking loader, so that working comfort level is improved.

An electronic dartboard comprises a dartboard frame in which a plurality of dartboard blocks are disposed. The dartboard blocks are formed of a dartboard body and a mounting seat in which the dartboard body is movably disposed. The dartboard frame is mounted in an outer frame which is provided with a score board and a circuit board. The dartboard frame is provided in the front with a plurality of protective frames, and in the back with an induction circuit film set. A cover plate is provided with a plurality of silencing holes and is fastened with the outer frame. A score display is separably connected to the circuit board.

A negative pressure gasoline pump comprises a gasoline pump body (1), an upper cover (2) and a lower cover (3). A negative pressure spring (10), a first spring cover (11), a membrane (12), a second spring cover (13) and positive pressure spring (14) are sequentially disposed between the inner wall of the upper cover (2) and the gasoline pump body (1). One side of the first spring cover (11) is connected to one end, close to the membrane (12), of the negative pressure spring (10) in a sleeved manner. The other side of the first spring cover (11) is abutted against the membrane (12). One side of the second spring cover (13) is connected to one end, close to the membrane (12), of the positive pressure spring (14) in sleeved manner. The other side of the second spring cover (13) is abutted against the membrane (12). A gasoline outlet membrane (15) is disposed between the lower cover (3) and the gasoline pump body (1). Compared with the prior art, the negative pressure gasoline pump has the advantages that the pump is high in gasoline speed, high in work efficiency and long in service life, and work efficient of an engine can be further increased.

The invention relates to a single-pile fixed vertical shaft wind power generator with a suction caisson in the technical field of marine fixed wind power generation, and the wind power generator comprises a vertical axis wind power generator, and a tower drum and the suction caisson which are arranged at the bottom of the machine in sequence and are provided with working platforms. The suction caisson is of an integral barrel-shaped structure which is formed by welding a steel sheet; a drainage short pipe and a flange are arranged on the top of the suction caisson. The single-pile fixed vertical shaft wind power generator with the suction caisson overcomes the defects of the prior art that the foundation installation fee of an offshore wind power generator is high, the installation cycle is long, the internal stress of the foundation of the offshore wind power generator is high, and the occupied area of a wind field is large, and has the advantages that the installation of the foundation of thewind power generator the whole system is quick, the installation cost is low, the internal stress of the foundation of the wind power generator is low, the occupied oceanic area of the wind field is small, and the like.

The invention belongs to the relevant technical field of mercury control in coal-fired flue gas, and discloses a rotational flow mercury adsorbent injection device. The device comprises a main injection barrel and two rotational flow impellers. The main injection barrel comprises a straight line section, a nozzle and a contraction section for connecting the straight line section with the nozzle. The contraction section is in a conical shape, the opening diameter of the end, connected with the straight line section, of the contraction section is larger than the opening diameter of the end, connected with the nozzle, of the contraction section, the two rotational flow impellers are stacked to the straight line section, air entering the straight line section form direct flow air and rotational flow air after passing through the rotational flow impellers, the direct flow air and the rotational flow air are mixed to drive a mercury adsorbent entering the containing cavity to enter the contraction section and accelerated through the contraction section and then enter the nozzle, and the nozzle is used for injecting the mercury adsorbent into a flue to be mixed with smoke gas in the flue for mercury adsorption and removal. The mixed gas is accelerated through the contraction section, the contact probability of the mercury adsorbent and smoke gas is increased, and the mercury adsorption efficiency is improved.

The invention relates to a device for simple setting up of stationary central vacuum cleaning installations in dwellings or the like. The device is in the form of a housing (6) with the purpose of accommodate a conventional vacuum cleaner (7) of the type that comprises an intake air inlet (22) to which a long suction hose (8) is connectable. Parts of the housing are detachable from the rest of the housing in order to enable adjustment of the vacuum cleaner in the interior of the housing. In the housing, an aperture (25) is formed for leading through the hose (8) to the vacuum cleaner, as well as an outlet.

The invention discloses a mobile beacon generating set. The mobile beacon generating set comprises a container body, a generating set, an illuminating beacon and a trailer, wherein the container body is mounted at the top of the trailer; the generating set is placed in the container body; the bottom of the illuminating beacon is fixed to the front end of the inner part of the container body; a skylight is formed in the top of the container body; the illuminating beacon penetrates through the skylight; the container body is muted; the illuminating beacon comprises a base, a telescopic rod, a main supporting frame and an illuminating assembly; the base is connected with the telescopic rod through arranging a hydraulic steering device; a hydraulic telescopic device drive is arranged on the telescopic rod; the main supporting frame is located at the top end of the telescopic rod; and the illuminating assembly comprises an illuminating projection lamp, a hydraulic mechanism, a first external gear, a second external gear, an inner gear and a step motor. The mobile beacon generating set disclosed by the invention aims to solve the problems that conventional mobile generator illuminating equipment is poor in regulating ability, and illuminating adjustment is time-consuming and labor-consuming.

The invention discloses a reflector cup sputtering control main case with a noise elimination function. The case comprises a case body, a power supply interface, a heat dissipation opening, a noise elimination device, I / O interfaces, serial ports, an air inlet, headphone jacks, machine bases, a noise elimination sponge panel, a noise elimination interlayer, a fixed steel plate, set screws, a Sono noise eliminator, a noise elimination suction cup, a connecting rack and a noise elimination computer core. The noise elimination device is arranged on one side of the computer case, the noise elimination sponge panel is arranged on one side of the noise elimination device, a sponge is made of an EVA material is resistant to high temperature and can filter and absorb part of noise generated by the case, the Sono eliminator is arranged on the interlayer of the elimination device, the principle applies a so-called ANC active noise reduction technology built by BOSE, when the case works to generate the noise, the eliminator can generate a sound opposite to the noise for superposition so as to eliminate the rest noise obtained after sponge absorption, the case can work more quietly, use is more comfortable, the computer case is convenient to operate, stable and firm, and all components are flexible in connection.

The invention discloses a novel structure of a transformer of a zero-clearance magnetic circuit and a less-clearance magnetic circuit. By adopting the technology of combining the advanced process of the zero-clearance magnetic circuit with a traditional structure of an existing large-scale transformer, the seam magnetic resistance can be effectively reduced, the magnetizing current and the noise of the transformer can be reduced, the efficiency of the transformer is increased, and the transformer is mute and does not disturb people; procedures of stacking and sealing off are simplified; the materials and the installation cost are reduced, and the transformer of the zero-clearance magnetic circuit and the less-clearance magnetic circuit is a great innovation in manufacturing technology practice after the structure of a zero-clearance magnetic circuit transformer is invented.