88results about How to "Achieve noise reduction effect" patented technology

The invention discloses an easy-to-disassemble high-air-tightness low-energy door and window, and belongs to the technical field of doors and windows, the easy-to-disassemble high-air-tightness low-energy door and window comprises a door frame and a fixing plate, a mounting plate is rotatably mounted on the side wall of the door frame through a hinge, mounting grooves are formed in the outer surfaces of the mounting plate and the fixing plate, and sealing assemblies are arranged on the inner walls of the mounting plate and the fixing plate; a dismounting assembly is arranged on the inner wall of the fixing plate; according to the sealing device, the sealing assembly is arranged, a supporting plate is driven by movement of a first rack, so that a rubber sealing strip is moved out of a mounting plate to make contact with the inner wall of a door frame, a gap between the door and window and the door frame is filled, the sealing strip is contracted into the door and window when the door and window are opened, and the sealing strip can be protected to a certain degree; the service life of the sealing strip is prevented from being shortened due to wind blowing and hot drying, meanwhile, the sealing effect can be prevented from being reduced after the sealing strip is air-dried, the sealing effect of doors and windows is effectively improved, and the service life of the sealing strip is effectively prolonged.

The utility model discloses a sound absorption structure of an earphone shell, and belongs to the field of earphones. An earphone shell sound-absorbing structure comprises a head-mounted ring, connecting ends are fixed to the ends of the two sides of the head-mounted ring, earmuffs are fixed to the inner sides of the connecting ends, a sound-absorbing component is bonded to one side of each earmuff through quick-drying glue, an earphone body is bonded to one side of each sound-absorbing component through quick-drying glue, and the earphone body is fixed to the head-mounted ring through the quick-drying glue. According to the utility model, the sound absorbing cotton is arranged in the hush pipe, and the hush pipe is connected with the sound absorbing group through the components such as the sleeve, the reserved opening and the cavity shell, so that sound can enter the hush pipe and is absorbed by the sound absorbing cotton, and the sound absorbing cotton can effectively absorb redundant sound and lingering sound; the transmission and reflection of noise are reduced, the silencing effect is achieved, and meanwhile the problems of sound quality loss and noise interference are solved.

The utility model relates to the technical field of building materials, and discloses an integrated improved building block core plate which comprises a first heat insulation plate and a second heat insulation plate, supporting lugs are fixedly connected to the two sides of the outer wall of the first heat insulation plate, a connecting column is fixedly connected to one side of the first heat insulation plate, and a hollow square frame is fixedly connected to one side of the second heat insulation plate. A clamping device is fixedly connected to the top of the hollow square frame, a pressing hole is formed in the middle of the top of the hollow square frame, and the outer walls of the connecting columns are slidably connected to the two sides of the middle of the second heat insulation plate. According to the utility model, the electric wire long tube is installed at the top of the first heat insulation plate, so that when a circuit needs to be installed in a later period, punching and wall damage are not needed, the electric wire short tube fixedly connected with one side of the electric wire long tube can lead to the interior of a room, and wiring of an installation switch or some electric appliances can be reserved, and the cover at one end of the electric wire short tube can be selectively used; and the sealing cover is opened when needed and is sealed when not used.

The invention discloses a silencing device for an outlet of a fire-fighting smoke exhaust fan. The silencing device comprises a mounting cylinder and a plurality of components assembled in the mounting cylinder, wherein the components comprise a smoke dust cleaning component, a heat exchange silencing component, a smoke dust collecting tank, an adsorption component and a smoke dust discharging component. The smoke cleaning assembly is located at the top of the mounting cylinder, the heat exchange silencing assembly and the smoke collecting tank are connected to the bottom of the mounting cylinder, the adsorption assembly is connected to the bottom of the heat exchange silencing assembly, and the smoke discharging assembly is connected to the bottom of the smoke collecting tank and located on the inner side of the adsorption assembly. The device forms a closed cold air through cavity, and a smoke outlet is formed in the bottom, so that effective smoke emission is ensured. In addition, the device further comprises a stirring assembly, a conveying assembly and a driving assembly which are connected with the adsorption assembly and the smoke dust discharging assembly respectively. Not only is the silencing effect remarkably improved, but also the functions of smoke cooling, dust removal and toxic and harmful substance treatment are integrated, many problems in the prior art are effectively solved, and a safe, environment-friendly and efficient smoke exhaust silencing device is provided for the field of fire protection and smoke exhaust.

The embodiment of the utility model relates to the technical field of intelligent beds, and particularly discloses an electromagnetic valve and an air bag bed. The valve body is arranged in the cavity, and the valve body is used for being communicated with external equipment and used for controlling on-off of airflow of the external equipment; and the buffer piece is connected with the shell, and the buffer piece is suitable for being installed on equipment to be installed. By means of the mode, connection between the shell and the support can be converted into connection between the shell and the buffering piece and connection between the buffering piece and the support, the buffering piece serves as an energy absorption buffering device and is used for absorbing shell vibration caused by working of the valve body, the damping effect is achieved, the valve body is contained in the shell, and therefore the valve body is not prone to falling off. And the noise generated by the valve body is isolated in the shell, so that the noise reduction effect is achieved, and the use experience of the air bag bed is improved.

The utility model provides a dielectric barrier discharge device and air treatment equipment, and relates to the technical field of air purification. The dielectric barrier discharge device comprises a dielectric barrier discharge assembly, the dielectric barrier discharge assembly comprises a first electrode, a second electrode and a barrier medium separating the first electrode from the second electrode, the barrier medium is cylindrical, the internal space of the barrier medium forms a discharge space, the first electrode is an internal electrode, the second electrode is an external electrode, the first electrode is arranged to be an electrode beam, and the second electrode is arranged to be an external electrode; the electrode beam comprises a plurality of electrode wires arranged side by side; and the power supply module is electrically connected with the first electrode and the second electrode and is arranged to load voltage to the first electrode and the second electrode, so that the dielectric barrier discharge component generates dielectric barrier discharge in the discharge space. According to the scheme, the internal electrodes are arranged into the electrode beams, so that the abnormal sound degree of the dielectric barrier discharge device can be reduced, and the problem of low plasma yield cannot be caused.

The utility model discloses a clothes processing device which is provided with a clothes processing cavity and an air duct cavity, the clothes processing cavity is provided with a first air inlet and a first air outlet, the air duct cavity is provided with a second air inlet and a second air outlet, the second air inlet is communicated with the first air outlet, the clothes processing device comprises a fan, and the fan comprises a volute and an impeller. The volute comprises a volute body, an inner cavity of the volute body is communicated with the first air inlet and the second air outlet, the inner cavity of the volute body comprises an impeller cavity, and the impeller is arranged in the impeller cavity; the volute tongue is located at the outlet of the impeller cavity and comprises a first volute tongue part, and the contour line of the side, facing the outlet, of the first volute tongue part gradually inclines towards the outlet in the axial direction of the impeller. According to the clothes processing device, the phases of periodic noise generated when airflow impacts the volute tongue can be staggered, so that noise of some phases can be counteracted mutually, and the noise reduction effect is achieved.

The utility model relates to the field of composite wooden doors, and discloses a composite wooden door with electromagnetic noise reduction, which comprises a door frame, a first wooden door shell and a second wooden door shell, the inner wall of one side of the door frame is fixedly connected with a plurality of articulation pieces, and the inner walls of one sides of the articulation pieces are respectively and fixedly connected with the first wooden door shell and the second wooden door shell. A plurality of magnetic suction plates are fixedly connected to the inner wall of one side of the door frame. According to the utility model, the magnetic plate is matched with the magnetic suction plate in a magnetic suction manner, so that a buffering effect is achieved when the door is closed, the generated noise is reduced, and when a user closes the door, if the force is too small and the door is not completely closed, the door is driven to be closed by the suction force generated by the magnetic plate and the magnetic suction plate, so that the protection performance of a room is improved; and moreover, the outer wall of the handle is sleeved with the anti-static coating, so that damage to a user caused by static electricity generated by the handle when the user opens and closes the door is avoided.

The utility model discloses an electric hair cutter with vibration and noise reduction functions, which comprises a shell, a fixing plate is fixedly connected in the shell, an outer rotor motor is arranged at the lower end of the fixing plate, a screw is arranged in the fixing plate, a spring washer is arranged on the surface of the screw, a rubber pad is arranged at the upper end of the outer rotor motor, and a motor is arranged in the outer rotor motor. An eccentric shaft is arranged in the shell, a movable knife rest is arranged at the upper end of the eccentric shaft, a knife head body is arranged at the upper end of the movable knife rest, and an on-off key is arranged on the surface of the shell. Through the structure, the outer rotor motor is fixed on the main body through the spring gasket and the rubber pad, and the spring gasket has the characteristics of elasticity and softness of the rubber pad, so that vibration and noise generated by collision between the spring gasket and the rubber pad are effectively reduced, and the noise reduction effect is achieved.

The utility model discloses a clutch clamping disc with buffering and noise reduction functions, relates to the technical field of clutch clamping discs, and aims at solving the problems that in the prior art, in the using process of a clutch clamping disc, noise can be generated due to the influence of friction transmission, and practicability is poor. The clamping disc comprises a clamping disc body, a plurality of sound absorption grooves are formed in the front end of the clamping disc body, the sound absorption grooves are annularly distributed, sound absorption blocks are arranged in the sound absorption grooves and made of polyester fiber sound absorption materials, a plurality of arc-shaped groove holes are formed in the clamping disc body, and the arc-shaped groove holes are formed in the clamping disc body and made of polyester fiber sound absorption materials. The outer side of the clamping disc body is fixedly provided with five arc-shaped side plates and five arc-shaped friction plates, and the arc-shaped side plates and the arc-shaped friction plates are arranged in a staggered mode.

The invention discloses a noise reduction structure for a vacuum pump, the noise reduction structure comprises a resonance box, the resonance box is provided with a plurality of resonance cavities arranged side by side, the plurality of resonance cavities are communicated in sequence, and vibration noise in the vacuum pump is spread outwards through a pump body outlet and enters the plurality of resonance cavities. Sound waves generate resonance and counteract under the action of the multiple resonant cavities which are communicated with one another, so that the amplitude of the sound waves is weakened. In the invention, the two adjacent resonant cavities are sequentially communicated through the non-return channel and the flow guide channel, and the opening, communicated with the flow guide channel, of the same resonant cavity and the opening, communicated with the non-return channel, of the same resonant cavity are arranged at intervals, so that airflow and vibration noise are subjected to direction change and path extension for many times in the flowing process; the complex flowing mode not only further weakens sound waves and reduces vibration noise through multiple times of reflection and interference, but also can quickly weaken the airflow velocity and reduce aerodynamic noise generated by airflow impact, and effectively weaken the noise level in the operation process of the vacuum pump.

The utility model relates to a noise reduction device and a backflow type noise reduction air pump thereof, which are used for an air pump comprising a cover plate (11), a valve seat (12), a diaphragm device (13), a driving device (14) and an air tap (15) arranged on the cover plate (11), and are characterized in that a backflow cavity (20) is formed between the cover plate (11) and the valve seat (12) in a matching manner; the backflow cavity (20) comprises a plurality of airflow channel units (21) and a plurality of diaphragm air inlet units (22) which are distributed at intervals. The air flow retaining wall is arranged on the cover plate to separate the air flow, so that the echo noise of the air flow is reduced, and the noise reduction effect is achieved.

The invention discloses an all-terrain vehicle. The all-terrain vehicle comprises a vehicle frame, a walking assembly, a suspension assembly, a power assembly and a transmission assembly. The walking assembly comprises a front wheel and a rear wheel, and the front wheel and the rear wheel are connected to the frame through the suspension assembly. The power assembly comprises an engine and a power output shaft. The transmission assembly comprises a drive axle, a transmission shaft and a buffer mechanism, the transmission shaft is used for connecting the drive axle and the power output shaft, the drive axle is further connected with at least one of the front wheels and the rear wheels, the power output shaft / or the drive axle is provided with a first connecting part, and the transmission shaft is connected with the first connecting part through the buffer mechanism. Through the arrangement, the impact on the transmission assembly when the whole vehicle bears high impact is reduced, so that the transmission assembly is better protected, meanwhile, vibration and noise transmitted by an engine are reduced, and then the damping and noise reduction effects of the all-terrain vehicle are improved.

The invention relates to the technical field of diesel generators, in particular to an energy-saving container type diesel generator set applied to a top-mounted split water tank, which comprises a container body, acoustic panels are arranged on the inner walls of the container body, a base is fixedly connected to the inner wall of the bottom end of the container body, and four groups of transverse plates are fixedly connected to the top end of the base. Damping mechanisms are evenly arranged at the top end of the transverse plate and in the mounting plate, a circulating water tank is arranged at the top end of the mounting plate, one end of the base is fixedly connected with a wind frame, and energy-saving mechanisms are arranged at the two ends of the container body and used for cooling a diesel engine and a generator body. And cooling mechanisms are arranged in the circulating water tank and the air frame. The device is very good in noise reduction effect, capable of effectively avoiding noise pollution, not limited by the adaptive environment and low in limitation, meanwhile, a proper cooling mode can be selected according to the external environment, and therefore energy consumption can be reduced, and meanwhile noise reduction can be achieved.

The invention relates to the technical field of bicycle parts, in particular to a wheel hub balance weight noise reduction structure and a preparation method thereof. The wheel hub balance weight noise reduction structure comprises a wheel hub body, connecting ribs and a center shaft sleeve used for being installed with a bicycle shaft; the plurality of connecting ribs are divided into a plurality of groups, reinforcing rib blocks are arranged between adjacent connecting ribs in each group of connecting ribs, and convection air holes for the connecting ribs to pass through are respectively formed in two sides of each reinforcing rib block; the cross section of each connecting rib is divided into a reinforcing part and a resistance reducing part, the multiple sets of connecting ribs are arranged, the reinforcing parts and the resistance reducing parts of the connecting ribs are rectangular and triangular respectively, the reinforcing rib blocks are arranged between every two adjacent connecting ribs, the two connecting ribs are supported through the reinforcing rib blocks, the connecting ribs are not prone to deformation, and the connecting ribs are not prone to deformation. Therefore, the original wheel spoke is replaced, the tensile strength of the wheel hub is improved, and the stability of the wheel hub is improved.

The utility model relates to the technical field of electronic control device relates to a kind of noise reduction gasket and relay.The noise reduction gasket includes: fixed part;First flexible deformation part, the first flexible deformation part is connected in the fixed part, and the first flexible deformation part is deformed and buffered and noise reduction in the first branch direction within first direction in first state;Second flexible deformation part, the second flexible deformation part is connected in the fixed part, and the second flexible deformation part is deformed and buffered and noise reduction in the second branch direction within first direction in second state;The second branch direction is opposite with the first branch direction, and the second state is different with the first state.The noise reduction gasket can reduce the generation of noise, inhibit the propagation of noise, improve the effect of noise reduction.

The utility model relates to the field of ventilation and dust removal, and discloses ventilation and dust removal equipment which comprises a box body, a mounting cavity and a water cavity are formed in the box body, the water cavity is of an L-shaped structure, clear water is stored in the water cavity, a draught fan is fixedly installed in the mounting cavity, an air suction pipeline is fixedly installed at the suction end of the draught fan, and the end, away from the draught fan, of the air suction pipeline extends out of the box body. The discharge end of the draught fan is fixedly connected with an air outlet pipeline, the end, away from the draught fan, of the air outlet pipeline extends into the water cavity and is immersed in the clear water, and the end, located in the clear water, of the air outlet pipeline is detachably and fixedly provided with a filter cartridge; and one end of the air inlet pipeline is communicated with the water cavity and is positioned above the clean water surface. The device has the following advantages and effects that when the device is used for dust removal, ventilation and humidification underground, water resources can be reasonably utilized, and the effect of saving the water resources is achieved.

The invention relates to the technical field of atomization equipment, and discloses an atomizer which comprises an outer shell and a compression pump arranged in the outer shell, a hanging support is arranged on the outer side of the compression pump, and the hanging support surrounds the bottom and the two sides of the opposite face of the compression pump; the two sides of the compression pump are connected with the two side walls of the hanging support in a hanging mode through flexible connecting pieces, and the bottom of the hanging support is connected with the bottom of the outer shell in an installing mode through a plurality of vibration reduction assemblies. The atomizing equipment has the effect of reducing noise generated in the working process of the atomizing equipment.

The utility model relates to the technical field of shielding cases, and discloses a noise reduction shielding case, which comprises a circuit board, an electronic component arranged on the circuit board, a clamping device arranged on the circuit board and positioned on the periphery of the electronic component, and a noise reduction shielding case arranged on the clamping device and positioned on the periphery of the electronic component. A clamping ring groove is formed in the top end of the clamping device, an inner cavity of the clamping ring groove is movably connected with the noise reduction shielding cover, a positioning groove is formed in the inner cavity wall of the clamping ring groove, a rotating clamping groove is formed in the inner cavity wall of the positioning groove, and an inner cavity of the rotating clamping groove is communicated with an inner cavity of the clamping ring groove. The inner cavities of the positioning groove and the rotary clamping groove are movably connected with the noise reduction shielding case, and the noise reduction shielding case comprises a shielding case. According to the utility model, not only is the noise reduction function realized, but also the phenomenon of discomfort caused by noise generated by electronic components can be avoided.

The utility model discloses a noise-reduction wear-resistant steel ball, which relates to the technical field of wear-resistant steel balls, and comprises a steel ball body, a limiting groove is arranged on the surface of the steel ball body, a wear-resistant layer is fixedly connected in the limiting groove, an internal noise-reduction structure is fixedly connected in the steel ball body, and the wear-resistant layer is fixedly connected in the internal noise-reduction structure. The internal noise reduction structure comprises a filling cavity and a filling layer in the filling cavity. The effect of keeping the overall strength of the steel ball is achieved through the honeycomb-shaped filling cavities, in actual use, the compression strength loss of the steel ball is smaller than 5%, the steel ball body has good stability, the effect of absorbing vibration energy is achieved through the filling layer made of the composite damping material, and the service life of the steel ball is prolonged. And therefore, the steel ball body has a good noise reduction effect.

The utility model relates to the field of air conditioner noise treatment, in particular to a unit structure giving consideration to attractiveness and noise reduction, which comprises a supporting mechanism for mounting and supporting, and a water disc guard plate component and a coil pipe side guard plate component which are used for carrying out auxiliary noise reduction on a compressor, and a coil pipe component is mounted at the top of the inner side of the supporting mechanism. A water disc protection plate assembly is arranged between the bottom of the coil pipe assembly and the supporting mechanism, water inlet and outlet side protection plate assemblies are installed on the two sides of the lower end of the water disc protection plate assembly, and coil pipe side protection plate assemblies are installed on the front end face and the rear end face of the lower end of the water disc protection plate assembly. Noise of the compressor is gradually absorbed by the relatively closed sound-absorbing cotton in the transmission process and is gradually weakened after being reflected through the corrugated concave-convex parts of the sound-absorbing cotton, noise can be reduced, and the effects of attractiveness and noise reduction of the modular air-cooled chiller unit are achieved.

The low-resistance special-shaped conductor wheel pressure type mold comprises an installation support, a low-resistance positioning assembly and a rolling wheel, the low-resistance positioning assembly comprises a seat body, a rotating bearing, an oil supply mechanism, an end cover and a ball, and a first installation groove is formed in the surface of the end, away from the inner side surface of the installation support, of the seat body. Second mounting grooves are formed in the outer sides of the first mounting grooves, the rotating bearings are rotationally connected to the inner walls of the first mounting grooves, the oil supply mechanisms are arranged on the inner walls of the second mounting grooves, the end covers are arranged on the outer sides of the second mounting grooves, and the balls are evenly and slidably connected to the surfaces of the end covers. Therefore, the balls arranged on the device not only achieve the limiting function on the rolling wheel, but also remarkably reduce the friction force between the balls and the surface of the rolling wheel, the abrasion degree is effectively reduced by reducing the friction force, the transmission efficiency is improved, in addition, the oil supply mechanism arranged on the device can supply oil to the balls, so that the surfaces of the balls are fully lubricated, and the service life of the rolling wheel is prolonged. The friction force is further reduced, and the effects of cooling and noise reduction are achieved.

The utility model relates to the technical field of vehicles, in particular to a vehicle door assembly and a vehicle. The vehicle door assembly comprises a door metal plate, a mounting structure and a door lock suction actuator, the mounting structure is connected with the door metal plate and the door lock suction actuator in a clamped mode, and the mounting assembly comprises a clamping shaft and a mounting piece. Due to the fact that the clamping shaft is connected with the installation piece and the door metal plate in a clamped mode, the installation efficiency of the door lock suction actuator and the door metal plate can be improved, and the sealing skirt edge covers the periphery of the connecting hole of the door metal plate to play a sealing role. In addition, the limiting hole and the communicating hole are matched with each other so that noise of the door lock pull-in actuator can be transmitted into the through hole from the limiting hole, due to the fact that a transmission medium in the through hole is air which is attenuated in the air, the sealing skirt edge can further achieve the noise reduction effect, and the situation that the noise of the door lock pull-in actuator is transmitted into a vehicle through the clamping hole of the door metal plate is reduced.

The invention discloses an all-terrain vehicle. The all-terrain vehicle comprises a vehicle frame, a vehicle body covering part, an engine and a walking assembly. The vehicle body covering part is at least partially arranged on the vehicle frame; the engine comprises an air cylinder body and a knock sensor arranged on the air cylinder body. The walking assembly is in transmission connection with the engine. The cylinder body comprises a first combustion chamber, a second combustion chamber and a third combustion chamber, the second combustion chamber is arranged between the first combustion chamber and the third combustion chamber, a mounting seat is arranged on the second combustion chamber, and the shock explosion sensor is arranged on the mounting seat. Through the arrangement, the impact on the transmission assembly when the whole vehicle bears high impact is reduced through the buffering mechanism, so that the transmission assembly is better protected, meanwhile, vibration and noise transmitted by an engine are reduced, and then the functions of shock absorption and noise reduction are improved.

The water purifier comprises a main machine framework, a hot water pump, a water inlet waterway board and a water outlet waterway board, the water inlet waterway board is provided with a water inlet pipeline, the water outlet waterway board is provided with a water outlet pipeline, the water inlet pipeline is connected with a water inlet of the hot water pump, and the water outlet pipeline is connected with a water outlet of the hot water pump. The water inlet pipeline is connected with a water inlet of the hot water pump, the water outlet pipeline is connected with a water outlet of the hot water pump, the water inlet waterway plate and the main machine framework are arranged in a separated mode, the main machine framework is provided with a limiting connecting part, the water outlet waterway plate is provided with a matching part, and the main machine framework is connected with the water outlet waterway plate in a limiting mode through matching of the limiting connecting part and the matching part. According to the water purifier capable of reducing vibration and noise, the fixed frequency of the water inlet waterway plate and the fixed frequency of the water outlet waterway plate can keep away from the working frequency of the hot water pump, transmission of vibration energy to the main machine framework is reduced, the resonance degree of the main machine framework is reduced, the working noise of the whole machine is effectively reduced, and the use experience is improved.

The utility model relates to the technical field of hollow glass, and discloses hollow glass with a good sound insulation effect, which comprises a glass body, an anti-fouling glass layer is arranged on the outermost layer of the glass body, a heat preservation glass layer is arranged at the rear end of the anti-fouling glass layer, and air bins are fixedly connected to the inner walls of the left end and the right end of the bottom of the heat preservation glass layer. Push plates are slidably connected to the inner walls of the air bins, first air pipes are fixedly connected to the middles of the opposite ends of the push plates and penetrate through the push plates, reset springs are arranged at the opposite ends of the push plates, and first top covers are rotatably connected to the horizontal positions, corresponding to the first air pipes, of the left ends of the air bins correspondingly; the opposite ends of the push plates are fixedly connected with pull rods and penetrate through the opposite ends of the air bins. According to the utility model, the air bin is added, the maintenance time is reduced, the service life is prolonged, and the threaded nails are added, so that the glass body can be replaced in time after one layer of the glass body is damaged, and the maintenance is convenient.

The utility model relates to the technical field of air pump accessories, in particular to a heat dissipation suite and an air pump thereof.The heat dissipation suite comprises a heat dissipation sleeve, a containing cavity used for containing the air pump is formed in the heat dissipation sleeve, one end of the heat dissipation sleeve is of a closed structure, an opening is formed in the other end of the heat dissipation sleeve, and a heat dissipation air channel is formed in the inner wall of the heat dissipation sleeve; the heat dissipation air channel extends from the closed end of the heat dissipation sleeve to the open end of the heat dissipation sleeve. The contradiction between noise suppression and heat dissipation enhancement of small and medium-sized air pumps in the prior art is effectively solved.

The utility model relates to the technical field of pipelines, in particular to a silencing three-way pipe which comprises a three-way pipe body, a first spacer and a second spacer. The three-way pipe body sequentially comprises a first water inlet pipe, a second water inlet pipe and a third water inlet pipe from left to right, and a water outlet pipe is further connected to the lower portion of the three-way pipe body. A first channel is defined by the first water inlet pipe, the first partition piece and the left side wall of the water outlet pipe, a second channel is defined by the second water inlet pipe, the first partition piece and the second partition piece, and a third channel is defined by the third water inlet pipe, the second partition piece and the right side wall of the water outlet pipe. And silencing gaskets are arranged on the inner walls of the first channel, the second channel and the third channel. Through the arrangement of the channels, the spiral silencing gaskets and the rotational flow assemblies, water flow can be prevented from being gathered immediately and impacting to generate noise, part of water flow energy can be eliminated, the defects in the prior art are overcome, generated noise is low, and noise pollution is reduced.

The present invention relates to a coating composition for heat insulation and sound absorption and a coated steel sheet having excellent heat insulation and sound absorption characteristics using the same, and more particularly, to a coating composition for heat insulation and sound absorption, a coated steel sheet using the same, and a method for manufacturing the same, the coating composition for heat insulation and sound absorption comprising: a polyvinyl chloride resin; a plasticizer; foaming the capsule; the foaming capsule is a foaming capsule with a core-shell structure, and the foaming capsule is composed of a polymer shell and a foaming agent core.

The application relates to the technical field of water purification equipment, and particularly discloses a low-noise water purifier which comprises a booster pump with a water inlet and a water outlet, a water inlet pipe and a water outlet pipe, the water inlet pipe is communicated with the water inlet, the water outlet pipe is communicated with the water outlet, the water outlet pipe comprises a main flow channel and a noise reduction bypass branch flow channel communicated with the main flow channel, the noise reduction bypass branch flow channel comprises at least two water passing openings, the water passing openings guide part of water in the main flow channel to enter and exit the noise reduction bypass branch flow channel so as to buffer the water flow in the main flow channel. The high-pressure pulsating water flow in the water outlet pipe can be branched to the noise reduction bypass branch flow channel for buffering, and then flows back to the main flow channel to be combined with the water flow in the main flow channel, the normal water outlet amount in the water outlet pipe is guaranteed, the high-pressure pulsating water flow in the water outlet pipe is buffered and decelerated, the water flow is stabilized, the noise reduction purpose is achieved.