64results about How to "Reduce wind noise" patented technology

The present invention provides an electronic device for reducing wind noise and its application. The raw materials of the porous block material include zeolite, adhesive and dispersant. The present invention also provides an electronic device comprising the above-mentioned porous block material. The present invention further provides an electronic device for reducing wind noise, including a body, an arc cover and a PCB board, the two ends of the body are respectively connected to the PCB board and the arc cover, the body is provided with an inner sound channel along the central axis, the arc cover is provided with an outer sound channel, the outer sound channel is in a windmill-shaped structure as a whole, including a central cavity and a plurality of branch channels, the branch channels are radially arranged around the central cavity, and each branch channel is a streamlined arc structure. The present invention further provides the application of the above-mentioned electronic device in an electronic device with a microphone. The electronic device provided by the present invention can effectively reduce wind noise and significantly improve the call quality of communication equipment.

The utility model relates to a transverse fan air curtain system and an agricultural sprayer, the air curtain system comprises two air curtain units, each air curtain unit comprises an air bag and a bottom groove, the two air bags are horizontally and oppositely distributed, can horizontally rotate and be positioned, and can rotate to the same straight line for operation or rotate to be distributed side by side for storage; the two bottom grooves are fixedly installed at the bottoms of the two air bags correspondingly and are parallel to the two air bags correspondingly, and a plurality of air outlets communicating with the corresponding air bags are evenly formed in the two bottom grooves at intervals correspondingly. And a transverse fan is fixedly mounted at the end part of at least one end of each air bag. The spraying machine has the advantages of being simple in structure, reasonable in design and capable of reducing drifting of pesticide sprayed by the spraying machine, saving 25%-30% of pesticide, enhancing penetrability of the pesticide, enabling the pesticide to be better attached to crops, improving working efficiency and guaranteeing the spraying effect. In addition, the fan is transversely arranged at the end of the air bag, and assembling is convenient.

The invention provides a mobile air conditioner capable of changing the cold air outlet direction and provided with obliquely-installed coaxial cold and hot air ducts, which comprises a shell serving as a mounting carrier, an air inlet, an air outlet, an air outlet, an air inlet and an air outlet, the shell is hollow, and a mounting cavity is formed in the shell; the volute assembly is obliquely arranged in the mounting cavity, the volute assembly comprises an upper volute assembly and a lower volute assembly located below the upper volute assembly, an upper volute cavity and a lower volute cavity are formed in the upper volute assembly and the lower volute assembly respectively, the upper volute cavity and the lower volute cavity are coaxially arranged, and the axis of the upper volute cavity and the axis of the lower volute cavity incline to the horizontal plane; an exhaust channel is arranged on the side wall of the upper volute cavity, extends upwards, is in butt joint with a first air outlet in the top of the shell and is used for discharging air. The mobile air conditioner capable of changing the cold air outlet direction and provided with the obliquely-installed coaxial cold and hot air ducts is compact in structure, small in size, low in manufacturing cost and use cost, convenient to assemble, high in air outlet speed, long in air supply distance, low in working noise, good in use effect and long in service life.

The embodiment of the invention relates to noise reduction equipment and method for a fan in a terminal. The noise reduction equipment comprises a first air duct, at least one noise reduction air duct and a switch combination. One end of the first air duct is connected with a fan air outlet, and the other end of the first air duct is connected with a terminal air outlet; one end of the noise reduction air duct is connected with the fan air outlet, and the other end of the noise reduction air duct is connected with the terminal air outlet; switches in the switch combination are arranged at an air inlet and an air outlet of the noise reduction air duct, and the switch combination is used for controlling the noise reduction air duct to be opened or closed; the air channel length difference between the first air channel and the noise reduction air channel is nL + L / 2, n is a natural number, and L is the wind noise wavelength at the air outlet of the fan. According to the embodiment of the invention, the wind noise at the air outlet of the terminal is mutually counteracted, so that the wind noise is reduced.

The invention provides a volute assembly, a fan and an air conditioner. The volute assembly comprises a volute; the diffusion section is arranged on the volute casing, and the diffusion section is communicated with the volute casing; the diffusion section comprises a lower wall, an upper wall and a diffusion side wall, wherein the lower wall and the upper wall are opposite, and the diffusion side wall is located between the lower wall and the upper wall. According to the volute assembly, the fan and the air conditioner, the shape of the diffusion side wall of the diffusion section is limited, and the shape of the diffusion side wall inclines outwards in the airflow direction and the direction from bottom to top, so that the diffusion side wall forms a curved surface shape gradually away from the center of the diffusion section; therefore, the distribution of the diffusion section and the diffusion degree can be reliably controlled to be matched with the speed distribution of air flow exhausted by the volute, the hidden danger that the air outlet speed of the volute is too large is solved, the outlet dynamic pressure of the volute assembly is effectively recycled, the static pressure carrying capacity and the air volume of a fan are improved, and air noise is reduced.

The present disclosure relates to an axial flow fan blade, a fan assembly, an air conditioner outdoor unit and an air conditioner. The axial flow fan blade comprises a hub and a plurality of blades arranged on the outer side of the hub, each blade comprising a pressure surface and a suction surface arranged oppositely, each blade comprising a blade inner edge and a blade outer edge arranged oppositely, and each blade further comprising a blade leading edge and a blade trailing edge arranged oppositely. Each blade is divided into a first region, a second region and a third region in a circumferential direction. The first included angle of the first region, the second included angle of the second region and the third included angle of the third region are selected to be in a ratio of 1:1.25-1.9:1.25-1.9.

The utility model discloses an unequal air gap motor structure and a scroll compressor, belongs to the technical field of compressors, and aims to solve the problems that the motor efficiency is influenced and vibration and noise are caused by adopting a uniform air gap structure. According to the technical scheme, the unequal-air-gap motor structure comprises a plurality of stator punching sheets and a plurality of rotor punching sheets, stator inner holes are formed in the stator punching sheets, the rotor punching sheets are located in the stator inner holes, and a plurality of magnetic poles are arranged on the sides, close to the rotor punching sheets, of the stator punching sheets. A plurality of air gaps are formed between the sides, close to the rotor punching sheet, of the magnetic poles and the outer ring surface of the rotor punching sheet, a plurality of concave structures are arranged on the sides, close to the rotor punching sheet, of the magnetic poles, the intervals of the air gaps are unequal, and through the concave structures which are the same in shape and structure and are mutually symmetrical, the machining difficulty is reduced, and the length of the air gaps can be remarkably increased; and meanwhile, an unequal air gap structure is formed, so that the noise in the operation process of the motor is reduced, the noise in the operation process of the scroll compressor is further reduced, and the performance and the reliability of the scroll compressor are improved.

The utility model discloses a kind of automobile A column reinforcing member based on lightweight design, it is related to the technical field of automobile parts, including external steel body, the inside of external steel body is equipped with main body reinforcing component, the inside of main body reinforcing component is equipped with energy-absorbing member, the side of external steel body away from the surface of main body reinforcing component is equipped with sound insulation cotton.The utility model can make the internal structure of automobile A column more stable by main body reinforcing component, reduce the deformation due to collision, protect front compartment safety, by energy-absorbing member, local shock wave can be offset, ensure that front compartment living space is not deformed, while the material density of energy-absorbing member is smaller, the overall weight of A column can be reduced, so as to reduce the weight of entire vehicle body, reach the effect of reducing fuel consumption, while external steel body is fixed together by hinge hole bolt and angle steel bolt, compared with general welding mode, when maintaining, avoid cutting A column, cause stress concentration of A column, affect the safety of overall A column structure.

The invention discloses an air duct dust removal device and an air conditioner indoor unit with the same. The air duct dust removal device comprises an air duct plate, a dust removal brush, a magnet and a driving device, the air duct plate is provided with an air outlet face, the dust removal brush is arranged on the side where the air outlet face of the air duct plate is located and comprises a brush head body and a magnetic core, the brush head body is suitable for being attached to the air outlet face, the magnetic core is installed on the brush head body, and the magnet is arranged on the side, away from the dust removal brush, of the air duct plate. The driving device is used for driving the magnet to move in the length direction of the air duct plate so that the magnet can drive the dust removal brush to move in the length direction of the air duct plate through magnetic force. According to the air duct dust removal device, the magnet drives the dust removal brush to move, and the magnet and the driving device are hidden on the leeward side of the air duct plate, so that the air outlet face of the air duct plate is clean and good in impression, dust coming from the air outlet is not prone to falling onto the magnet and the driving device, the cleaning difficulty of the air duct dust removal device is lowered, and the air outlet noise is low; and the air volume is not influenced.

The utility model belongs to the technical field of cooking equipment, and particularly provides a cooking utensil and a silencing component. In order to solve the problem that air noise is large when an existing cooking utensil exhausts air, the cooking utensil comprises a machine body, a machine cover and a silencing component. The machine body is provided with a cooking cavity. The machine cover is used for opening and closing the cooking cavity, and an exhaust channel is formed in the machine cover and used for exhausting gas in the cooking cavity. The silencing component is embedded into the exhaust channel, a silencing channel is defined by the silencing component and the peripheral wall of the exhaust channel, and the through-flow area of the silencing channel is alternately increased and decreased, so that the flow speed of gas is repeatedly increased and decreased, and the wind noise is reduced.

An electric telescopic handle for a vehicle comprises: a handle body, a handle base, wherein the handle body is installed in the handle base; an unlocking device, which is movably arranged on the handle base, and the unlocking device is transmission-connected with the handle body and connected with a car door lock; an electric ejection device, which comprises a driving device, a pull rod, a push rod and a tilting rod; a track boss, which is fixedly arranged on the handle base and has an electric opening track surface and a mechanical opening track surface; a first guide block and a second guide block, both of which are arranged on the handle body, the first guide block forms a contactable connection with the electric opening track surface of the track boss, and the second guide block forms a contactable connection with the mechanical opening track surface of the track boss. The present invention realizes the guiding function through the cooperation of the track boss and the first guide block and the second guide block, forming two independent motion tracks, and has two operation modes of the electric ejection handle and the mechanical ejection handle, meeting the use requirements of different application scenarios.

The utility model discloses a kind of air intake structures of rear air intake hair dryer. It includes: air duct body;Several air inlets, set in the air intake end of the air duct body and located on the side wall of the air duct body;Fan module, set between the air intake end of the air duct body and the air outlet end of the air duct body;Flow guide plate, set in the inside of the air duct body and located between fan module and air inlet;Several flow guide holes, set on the flow guide plate;Transition fillet, set at the port of both ends of flow guide hole.The beneficial effects of the utility model are: reduce the wind noise of the air intake end of air duct body;It plays the role of protecting internal components, improves the service life of hair dryer;Increase wind speed;Increase the structural strength of filter screen;Filtering effect is good;Reduce fan noise.

The utility model provides a hinge assembly and a vehicle, which comprises a vehicle body hinge seat and a vehicle door hinge seat rotatably connected to the vehicle body hinge seat, and the vehicle body hinge seat is installed in a vehicle body gutter channel outside a vehicle roof. The utility model provides a hinge assembly and a vehicle, and aims to solve the problem that in the prior art, a vehicle body connecting seat is installed in a cavity of a vehicle body, the internal space of the vehicle body is occupied, and the head space of a passenger in a cab is limited.

The application discloses a curve saw, which comprises a first air duct, a second air duct and a third air duct formed in the interior of a shell and communicated with each other, and an air duct switching device is arranged between at least two of the air ducts, the air duct switching device comprises a push button exposed at least partially to the shell and a conversion piece located in the interior of the shell, the conversion piece is horizontally movable under the drive of the push button to control the switching of the air ducts in the open or closed state. The third air duct allows air flow to flow in or out as an independent heat dissipation air duct and keeps the same open or closed state with the second air duct. When the curve saw is in the dust collection mode, the heat generated in the transmission cavity in the interior of the curve saw can flow out of the curve saw through the third air duct, and heat dissipation is more efficient. The side wall of the third air duct is also penetrated by an air duct circulation hole, which allows the air flow in the third air duct to re-enter the transmission cavity, forms the circulation flow of part of the air flow, and achieves more balanced and more continuous temperature control, and the generated air noise is smaller.

The utility model provides a handheld scrubber which comprises a supporting rod, an air inlet channel, an air suction motor and an air outlet channel, the air suction motor is located on the upper portion of the handheld scrubber, and an air outlet of the air outlet channel is located in the bottom of the handheld scrubber. The length of the air channel of the scrubber is increased, and the air noise of the scrubber is remarkably reduced; by the adoption of the scheme, the wind noise of the scrubber can be remarkably reduced, the using effect of the scrubber is improved, the problems existing in traditional cleaning equipment can be effectively solved, and the cleaning device is suitable for various handheld scrubbers.

The tuyere structure comprises an inner shell and an inner flow guide body, the inner shell is provided with a containing cavity, the inner flow guide body is arranged in the containing cavity and connected with the inner shell, the top end of the inner flow guide body is arranged in a plane mode, and the left side and the right side of the inner flow guide body are provided with a first guide face assembly and a second guide face assembly respectively. The first guide face assembly extends from the bottom end of the inner flow guiding body to the left side edge of the plane of the top end of the inner flow guiding body, and the bottom end of the inner flow guiding body of the second guide face assembly extends towards the plane edge of the plane of the top end of the inner flow guiding body. And the front and rear sides of the first guide surface assembly and the second guide surface assembly are connected with the front and rear sides of the plane of the top end of the inner flow guide body through a third guide surface assembly. According to the utility model, the inner flow guide body is arranged, and the two sides of the outer surface of the inner flow guide body are integrally close to the arc surface of the center, so that wind noise is reduced, and wind loss is reduced.

This application discloses a down-blowing bathroom heater window, including a window frame and glass. The window frame includes a lower part, with a down-blowing air inlet on the outer side of the lower part. A heating element and a warm air fan are housed inside the lower part, and the warm air fan is connected to the down-blowing air outlet on the inner side. The beneficial effects of this application are: the down-blowing air outlet is close to the ground, forming a bottom-up heating method. The overall thermal effect of the space is more even under the operation of the warm air fan, solving the common problem of ceiling-mounted bathroom heaters not easily warming lower spaces, optimizing the heating path, and ensuring heating effect; the embedded installation of the device is achieved based on the window opening and window frame, making full use of the internal space of the window frame without occupying additional space, ensuring the utilization rate of indoor space, ensuring the comfort of using the device, and also significantly reducing wind noise caused by the high-power fan due to the window opening.

The invention relates to the technical field of fans, in particular to a top-in and bottom-out bladeless fan mechanism. Three air guide arms are annularly and equidistantly connected to the inner side in a penetrating manner, and one ends of the inner sides of the three air guide arms are connected with a fan cabin in a penetrating manner; the inner wall of the air guide arm is provided with a ventilation channel penetrating through the fan cabin and the annular flow channel. The external centrifugal fan can extract air and exhaust the air into the annular flow channel, through the design of the flow guide air channel and the multiple flow deflectors, wind power is effectively buffered, the flow deflectors are guided to be attached to sound absorption materials at inlets, wind noise generated by air flowing is remarkably reduced, and on the premise that the ventilation effect (the wind speed reaches 1.37 m / s, and the wind area exceeds 0.8 m) is guaranteed, the ventilation efficiency is greatly improved. A relatively quiet use environment is created for a user, and the comfort is improved.

The utility model relates to the technical field of earphones, in particular to a sound cavity structure and an earphone, and the sound cavity structure comprises a shell, a sound production unit and a PCBA (Printed Circuit Board Assembly) board. The shell comprises an upper cover and a lower shell which are fixedly connected, the lower shell is provided with a sound outlet hole, and the side wall of the upper cover is provided with an air leakage hole; the sounding unit is fixedly arranged in the lower shell; the PCBA board is fixedly arranged in the upper cover, the PCBA board is electrically connected with the sound production unit, and the air leakage hole is located between the PCBA board and the sound production unit. According to the utility model, the PCBA board is fixedly arranged in the upper cover, a sound cavity cover does not need to be added, only the air leakage hole is arranged between the PCBA board and the sound production unit, all materials of the PCBA board are designed in the upper cover, and the PCBA board and the upper cover are combined into a rear cavity cover through sealing of glue, so that the efficiency is improved, and the operation difficulty is reduced.

The present invention provides a deflector wind ring, an axial flow fan and an air conditioning unit, wherein the deflector wind ring defines an axial direction, and the two ends of the axial direction are respectively defined as an air intake port for gas to enter the deflector wind ring and an air outlet port for gas to flow out of the deflector wind ring, and the deflector includes an inlet section, a middle section and an outlet section in sequence from the air intake port to the air outlet along the axial direction, and the middle section is provided with guide holes penetrating the wall thickness. The deflector wind ring, axial flow fan and air conditioning unit of the present invention change the conventional design concept that the inner surface of the existing deflector wind ring is usually a smooth and non-porous inner wall, and open guide holes in the middle section of the deflector wind ring, which can achieve the purpose of optimizing the airflow channel and reducing the wind noise of the airflow.

An air outlet mesh cover includes: a connecting component, a first rib and a plurality of air outlet grilles; the first rib is an annular structure arranged outside the connecting component, which is connected to the plurality of air outlet grilles; the plurality of air outlet grilles are respectively connected to the connecting component, and extend radially outward with the center of the connecting component as the center of the circle, and the height of the connecting portion between the air outlet grille and the first rib is greater than the height of other parts of the air outlet grille. A mesh cover assembly and an electrical appliance including the above-mentioned air outlet mesh cover are also provided. By increasing the height of the connection between the air outlet grille and the first rib, the height of the connection between the air outlet grille and the first rib is made greater than the height of other positions of the air outlet grille to form a longer air supply channel, thereby increasing the wind speed at the center of the air outlet mesh cover, increasing the air supply speed, increasing the air supply distance, reducing the divergence of the air flow, and improving the user experience when using it.

The utility model provides an earphone and an earphone assembly. The earphone comprises a shell, a sound production unit and a sound reception unit. A sound inlet is arranged in the housing. The sound production unit and the sound reception unit are arranged in the housing. The sounding unit is arranged on one side, close to the auricular conchae, of the sound receiving unit. The sounding unit is electrically connected with the radio unit. A first pickup hole, a pickup channel and a second pickup hole which are integrally formed through injection molding are formed in the shell. The first pickup hole and the second pickup hole are arranged on two opposite sides of the shell along the first direction and are used for communicating with the external environment. The pickup channel is communicated with the first pickup hole and the second pickup hole along the first direction. The sound inlet is arranged on one side of the pickup channel along the second direction and is used for communicating the pickup channel with the sound receiving unit. The pickup channel is isolated from the sounding unit. Wherein the first direction intersects with the second direction. According to the earphone provided by the embodiment of the invention, the processing procedure after the shell is formed can be omitted, and the production cost of processing and manufacturing is reduced.

This utility model discloses a vibration-damping and noise-reducing silent heat sink, including a heat sink assembly, a fan, and a base plate. It also includes a vibration-damping connector and a flow guide shroud. The vibration-damping connector is made of an elastic material and has a ring-shaped structure, nested between the fan and the flow guide shroud. The flow guide shroud surrounds the air outlet side of the fan, and its inner wall has a spiral flow guide groove. The heat sink assembly includes multiple wavy, non-equidistantly arranged heat dissipation fins, forming a gradually expanding airflow channel. The bottom of the base plate has a honeycomb-shaped vibration-damping cavity filled with damping adhesive. The three-stage vibration-damping structure significantly reduces vibration transmission rate, reduces resonance, and extends equipment life. The spiral flow guide groove, sound-absorbing grille, and wavy fin phase difference design significantly reduce wind noise and structural noise.

The utility model discloses an upward blowing type heater which comprises a window frame and glass, the window frame comprises a window frame lower body, a lower air inlet is formed in the outer side of the window frame lower body, a heating element and a warm air fan are arranged in the window frame lower body, and an upward blowing air supply outlet communicated with the warm air fan is formed in the inner side of the window frame lower body. The device has the beneficial effects that embedded installation of the device is achieved based on the window opening and the window frame, hot air supply at the low position is achieved, the internal space of the window frame is fully utilized, other space is not additionally occupied, the indoor space utilization rate is guaranteed, the use comfort of the device is guaranteed, and wind noise caused by a high-power fan can be obviously reduced based on the window opening; the heating device achieves dual purposes in an upward blowing mode, provides warm air for the interior of a room and can achieve drying at the same time, a half of a heating main machine is saved, supporting facilities are obviously saved, materials are saved, and the cost is reduced by about a half.

The present application relates to the technical field of elevator devices, and specifically discloses a noise-reducing elevator car, comprising: a car body, on which a car switch door is arranged; a floor switch door, which is arranged at a docking interface of a floor; a vacuum device, which is arranged in an elevator shaft and is used to form a negative pressure environment in the elevator shaft, thereby reducing wind noise during elevator operation; and a connecting sealing device, which, when the car body is parked at the floor switch door and the floor switch door and the car body are both in an open state, isolates the docking area of ​​the floor switch door and the car body from the elevator shaft, thereby preventing the vacuum environment of the elevator shaft from being destroyed when the car body is parked. The present invention can put the elevator shaft in a vacuum state by arranging a vacuum device and a connecting sealing device, so that the noise during elevator operation is low.

The utility model discloses a rotor assembly, a motor and a food processor. The rotor assembly comprises a motor shaft, an upper end piece, a lower end piece magnet or a coil winding. The upper end piece is fixed to the motor shaft. The lower end piece is fixed to the motor shaft, and the lower end piece and the upper end piece are arranged at intervals in the axial direction of the motor shaft. And the magnet or the coil winding is fixed on the motor shaft and is positioned between the upper end piece and the lower end piece. At least one of the upper end piece and the lower end piece comprises fan blades, and the fan blades are arranged in the circumferential direction of the motor shaft at intervals. Therefore, after the rotor assembly and the stator assembly form the motor, the fan blades serve as components of the motor, the fan blades and the motor are mutually independent components, and compared with the fan blades which are separated from the motor by a preset distance in the axial direction of the motor shaft, the rotation of the fan blades does not enable the motor to swing, so that the dynamic balance of the motor is good. And the fan blades can generate wind, and the wind is used for cooling the motor, so that the motor has good dynamic balance on the premise of having a cooling function.

The present invention belongs to the technical field of compressors, and specifically is a low wind resistance balance block for rotors, a rotor assembly and a compressor. The balance block is in an arc-shaped structure as a whole, and the base height of the balance block is flush with the top height of the cast aluminum rotor. A boss is provided on the base of the balance block, and the boss and the base are an integrated structure. The boss is an arc-shaped fin-type structure, and the windward surfaces of both ends of the boss are rounded or arc-shaped transitions; mounting holes are provided at both ends of the base, and the center of the mounting hole passes through the center plane of the rotor. The present invention adopts a fin-type boss balance block, and the fin structure can greatly reduce the rotational wind resistance and reduce wind noise. At the same time, it can also reduce resistance and improve performance.

This invention discloses an air supply device assembly, including an air duct assembly and an air outlet assembly for generating airflow. The air duct assembly includes a front frame, a middle frame, and a rear frame for forming the air duct. The rear frame forms an air inlet on one side of the middle frame, and the front frame forms an air outlet on the other side of the middle frame. The middle frame is closed around the air duct, and a funnel-shaped air guide portion is formed on the middle frame corresponding to the air inlet. Multiple air guide grooves are formed on the air guide portion in the circumferential direction. The air guide grooves are arranged with respect to the airflow path. The air guide portion and the air guide grooves limit the airflow path in the air duct and constrict the airflow at the air outlet, thereby increasing the air outlet effect.

The silencing pipe comprises a plurality of noise reduction modules, the multiple noise reduction modules are spliced and define the silencing pipe, an airflow channel is defined by the inner side of the silencing pipe, each noise reduction module is provided with a resonant cavity and a communicating hole communicating with the resonant cavity, and the communicating holes are communicated with the resonant cavity. And the resonant cavity is communicated with the airflow channel through the communicating hole. According to the silencing pipe, the multiple noise reduction modules are spliced and encircled to form the silencing pipe, the sound absorption effect of the silencing pipe can be improved, the air outlet noise of the duct type air conditioner can be reduced, and then the use experience of the duct type air conditioner can be improved; meanwhile, the number of the noise reduction modules can be designed according to different types and installation spaces of the silencing pipe so that the silencing pipe can be flexibly assembled, the universality of the silencing pipe can be improved, and the market competitiveness of the duct type air conditioner can be improved.