205results about How to "Reduce wind noise" patented technology

The invention relates to the technical field of automobile air conditioners, in particular to an air inlet structure with a compensation air opening and an automobile air conditioner. The ventilation structure with the compensation air opening comprises a ventilation box and a ventilation device, wherein an outer circulation air inlet, an inner circulation air inlet, the compensation air opening and an air outlet are sequentially formed in the ventilation box; the air conditioner filter element is installed on the inner wall of the ventilation box in an abutting mode and located between the inner circulation air inlet and the compensation air opening. The air door is rotationally installed on the inner wall of the ventilation box, and the driving piece drives the air door to rotate so as to seal the outer circulation air inlet or the inner circulation air inlet. The structure can reduce the filtering burden of the air conditioner filter element, prolong the service life of the air conditioner filter element, reduce air noise, serve as a partition plate, reduce leakage of cold air or hot air, save energy consumption and remarkably improve the refrigerating or heating effect of an air conditioner.

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 an air outlet grille, an outdoor unit and an air conditioner, the air outlet grille comprises a central disc located in the center, an outer frame located on the outermost edge and a rib set located between the central disc and the outer frame, the rib set comprises circumferential ribs and radial ribs, and the radial ribs are distributed in a radiation mode with the central disc as the center; the curve along which the air guide surfaces of the radial ribs are arranged according to a position angle, an inlet angle and an outlet angle, the angle range of the position angle is 50-52 degrees, the angle range of the inlet angle is 5-10 degrees, and the angle range of the outlet angle is 10-20 degrees. The outdoor unit comprises an air outlet grille, and the air conditioner comprises the outdoor unit and an indoor unit. The radial ribs still meet the trend that the bending degree is increased along with the increase of the radius in the radial direction; and furthermore, the curve of the radial rib is ensured to have an angle which is adaptive to the rotation direction of the axial flow fan blade and the air outlet angle of the axial flow fan blade with a larger forward bend, so that the air outlet blocking is reduced, the air direction is adjusted, the local turbulence is reduced, and the heat dissipation efficiency is improved.

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 utility model discloses a high-speed elevator landing door windproof noise reduction structure which comprises a door pocket assembly, a landing door assembly and a landing door sill, the landing door sill is installed at the lower end of the door pocket assembly, the landing door assembly is located on the landing door sill, a sealing wool top is installed on one side of the landing door assembly, and the landing door assembly is located on the landing door sill. After the elevator landing door is closed, the left side door and the right side door are sealed through the door rubber strip, a gap between the left side door and the right side door is avoided, then the landing door assembly and the door pocket assembly are sealed through the sealing wool top, and therefore the sealing effect is good. The gap between the landing door assembly and the door pocket assembly is avoided, and when an elevator runs at a high speed, airflow is effectively prevented from quickly circulating between an elevator shaft and an elevator waiting hall, so that wind sound and noise generated when the elevator runs are reduced, and the riding comfort of passengers is improved to a certain extent.

The mobile air conditioner comprises a shell, a horizontal partition plate is arranged in the shell and divides the shell into an upper cavity and a lower cavity, a first volute assembly made of heat preservation materials is arranged in the upper cavity, a first volute cavity is formed in the first volute assembly, an evaporator is arranged at the air inlet end of the first volute cavity, and a second volute assembly made of heat preservation materials is arranged at the air outlet end of the first volute cavity. The air outlet of the first volute cavity faces upwards; a second volute assembly is arranged in the lower cavity, a second volute cavity is formed in the second volute assembly, a condenser is arranged at the air inlet end of the second volute cavity, and the air inlet end of the second volute cavity and the air inlet end of the first volute cavity are located on different faces of the shell. The mobile air conditioner with the heat preservation air cavity is compact in structure, convenient and rapid to assemble, high in precision, low in working noise and power consumption, large in air outlet amount, long in air supply distance and good in heat dissipation performance, continuous and stable refrigeration of the mobile air conditioner is guaranteed, and the using effect is good.

The utility model discloses a blowing device which comprises a first air outlet cylinder, a second air outlet cylinder, a drainage device and a heating mechanism, and a first air outlet channel is formed in the first air outlet cylinder; the second air outlet cylinder is connected to the first air outlet cylinder, a drainage cavity and a second air outlet channel are formed in the second air outlet cylinder, and the second air outlet channel communicates with the drainage cavity and the first air outlet channel; the heating mechanism is arranged in the first air outlet channel and comprises a heat insulation sheet and a heating wire, the heating wire is wound around the heat insulation sheet, a plurality of heating wire sections arranged side by side are formed on the first surface and the second surface of the heat insulation sheet correspondingly, and the heating wire sections extend in the airflow direction of the first air outlet channel; the first air outlet channel and the channel inner wall of the first air outlet channel are arranged at intervals. According to the technical scheme, noise generated by the air blowing device and heating power consumption are reduced, and practicability and reliability of the air blowing device are improved.

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 belongs to the technical field of earphones, and particularly relates to a method for reducing wind noise of an earphone, a noise reduction device, the earphone and a computer storage medium. The method for reducing the wind noise of the earphone comprises the steps of obtaining wind power information of the position where the earphone is located and orientation information of a sound inlet hole of a microphone of the earphone, calculating actual wind noise energy according to the wind power information and the orientation information of the sound inlet hole, and matching a corresponding audio according to the actual wind noise energy and reversely counteracting the wind noise at the sound inlet hole. According to the technical scheme, the product can automatically match the wind power information of the position where the user is located and the sound inlet hole orientation information of the microphone of the earphone, actual wind noise energy can be calculated through the wind power information and the sound inlet hole orientation information of the microphone, and corresponding audio frequency is matched to reversely act on real-time wind noise at the sound inlet hole of the earphone, so that the real-time wind noise energy is calculated. Noise caused by wind blown in through the sound inlet hole of the microphone is offset, and the effect of intelligent noise reduction of the earphone according to wind power is achieved.

The utility model discloses an air blower with a novel noise reduction air inlet structure, which comprises an air inlet cover, a motor and a shell, the air inlet cover is arranged around the shell of a cavity where the motor is located, the air inlet cover is provided with an end part and a side part, and a table board with air inlet holes is arranged at the joint of the side part and the shell of the cavity where the motor is located. The table top enables the fluid direction and the noise transmission direction of the air inlet to be changed, the air layer cavity is formed in the table top, in this way, the air noise of the air inlet is greatly reduced, and the technical problems that in the prior art, the air noise at the air inlet is too large, and the use noise is large due to radial transmission of the noise are solved; and the beneficial effects of low wind noise and better use experience are achieved.

The embodiment of the utility model discloses an earphone pickup structure capable of reducing wind noise and an earphone, which are used for solving the technical problems that in the existing earphone design, external airflow easily enters the earphone from a pickup hole, so that the wind noise of the earphone is too large, and the active noise reduction effect, the tone quality effect and the call effect of the earphone are influenced. The sound box comprises a housing and a pickup assembly. The shell is provided with a first side face facing a human face and a second side face back to the human face, a windproof groove is formed in the first side face of the shell, the windproof groove is sunken towards the interior of the shell, and a pickup hole communicated with the interior of the shell is formed in the groove bottom wall of the windproof groove; and the pickup assembly is installed in the shell and comprises a noise reduction microphone, and the noise reduction microphone is arranged corresponding to the pickup hole.

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 invention discloses a water mist air-conditioning fan which is a household appliance for reducing indoor temperature by adding a water mist function on the basis of a traditional fan. The electric fan integrates the advantages of convenience in use, money saving and good cooling effect of an air conditioner of a common electric fan. The air conditioner can increase humidity of indoor dry air and can be used in a ventilated environment. The purpose of the water mist air conditioner fan is achieved through two important designs. According to the design I, the motor is arranged at the top end of the air conditioner fan, so that three advantages can be brought, the ventilation quantity can be obtained to the maximum extent, wind noise can be reduced, and electric leakage accidents can be prevented; according to the second design, a traditional fan and an atomizer are combined, the atomizer can generate water mist rising upwards, the water mist is automatically sucked in under rotation of the fan and blown out from an air outlet, and therefore the refrigeration effect is achieved. The water mist air conditioner fan is mainly used for relieving summer heat.

The invention belongs to the field of air pipes, and particularly relates to a fabricated environment-friendly silencing air pipe which comprises edge strips. A storage cavity is formed in each edge strip, a polyurethane foaming agent is stored in each storage cavity, an injection opening is formed in the bottom end of each storage cavity, the four sets of edge strips are arranged, an outer side plate is arranged between every two sets of edge strips in the longitudinal direction, one side of each outer side plate is attached to the corresponding inner side plate, and the other side of each outer side plate is attached to the corresponding inner side plate. A plurality of sets of exhaust ports are formed in the center position of the side, away from the inner side plate, of the outer side plate, filling noise elimination mechanisms are arranged between the outer side plate and the edge strips and between the inner side plate and the edge strips, and an assembly type noise elimination mechanism is arranged between every two transverse sets of edge strips; the filling noise elimination mechanism is used for suppressing noise generated when the air flow impacts the inner side plate; through the structural design of the combination of the filling noise elimination mechanism and the assembly type noise elimination mechanism, the function of suppressing wind noise from multiple directions is achieved.

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 present invention discloses a wing-span type power supply vehicle, comprising a chassis and a body, wherein the body has a body wall for noise reduction, sound absorption and sound insulation, the front and rear parts of the body are respectively provided with an air intake noise reduction system and an air exhaust noise reduction system, and the side of the body is provided with a wing panel that can be deployed and closed. Under the condition of ensuring sufficient air circulation in the body, the noise of the air intake and exhaust air flow and the propagation to the outside of the body caused by the equipment such as the generator set in the body are effectively reduced, and noise pollution to the workplace is avoided, so that the overall mute effect of the power supply vehicle is significantly improved when it is working, and at the same time, it has good air circulation performance. By arranging the wing panels that can be deployed and closed on the side of the body, the removal and overhaul and maintenance of the equipment such as the generator set are greatly facilitated, and the large equipment such as the generator set can be removed without disassembling the body, and the overhaul and maintenance are convenient, efficient, safe, stable and reliable.

The utility model provides an electric air outlet and a sealing air guide mechanism thereof, which comprise a shell, an inner support, an air guide blade group, an air door, an air guide plate and a driving device, an air duct is formed in the shell, the air inlet end of the air duct is used as a first air duct area, and the air outlet end of the air duct is used as a second air duct area; the inner support is installed in the second air duct area and divides the second air duct area into an upper air duct and a lower air duct. The air guide blade group is mounted in the upper air duct and the lower air duct; the two air doors are respectively mounted at the air inlet ends of the upper air duct and the lower air duct; the air guide plate is rotationally mounted in the first air duct area and located between the upper air duct and the lower air duct; the driving device is installed outside the shell and used for driving the air guide blade set, the air door and the air guide plate to rotate. The electric air outlet and the sealing air guide mechanism thereof are compact in structure, attractive in appearance, low in noise and power consumption and good in use comfort.

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 low-noise cooking utensil comprises a pot body, a pot cover and a first heat dissipation assembly installed on the pot cover, the pot cover comprises a surface cover and an inner cover, and the surface cover and the inner cover are matched to define a cooling cavity communicated with the outside. The first heat dissipation assembly comprises a first sealing ring, a mounting cavity and a first fan assembly arranged in the mounting cavity, a first ventilation hole is formed in the bottom wall of the mounting cavity, and air blown out of the first fan assembly flows to the cooling cavity through the first ventilation hole and then is discharged to the outside; a damping gap is formed between the first fan assembly and the side wall of the mounting cavity, and the first sealing ring is arranged between the first fan assembly and the bottom wall of the mounting cavity so as to prevent cold air at the air outlet end of the first fan assembly from flowing to the damping gap. According to the cooking utensil, noise can be effectively reduced, and the air cooling effect can be improved.

The utility model relates to the technical field of permanent magnet direct current brushless motors, and discloses a claw-type mounting structure of an inner rotor permanent magnet direct current brushless motor, which comprises a stator core lamination, an enameled wire winding is fixedly mounted on the outer side of the stator core lamination, and a front claw-type motor mounting frame is in bolted connection with the front surface of the stator core lamination. The front surface of the stator core lamination is in threaded connection with a front claw type motor mounting rack, the rear surface of the stator core lamination is in threaded connection with a rear claw type motor mounting rack, bearings are fixedly mounted on the inner sides of the front claw type motor mounting rack and the rear claw type motor mounting rack, a shaft is fixedly mounted between the two bearings, and a rotor core is fixedly mounted on the outer side of the shaft; a plurality of magnets are fixedly installed on the rotor iron core. The claw type installation structure of the inner rotor permanent magnet direct current brushless motor is low in wind noise and has excellent quality of low mechanical friction noise and low wind noise, the motor is stable in installation and reliable in operation, and the overall performance of the motor is improved.

The utility model provides a duct type air conditioner and an air conditioner. The duct type air conditioner comprises a shell, a first air duct and a second air duct, the first heat exchanger is arranged on the second air duct and is connected with a refrigerant pipe; the separator is located in the second air duct and connected with the end, close to the refrigerant pipe, of the first heat exchanger, the second air duct forms a heat exchange air duct and a mounting cavity on the two sides of the separator, the heat exchange air duct is communicated with the first air duct, the fins of the first heat exchanger are located in the heat exchange air duct, and the refrigerant pipe is located in the mounting cavity. The separator isolates the mounting cavity from the heat exchange air duct, prevents the air beam blown to the heat exchange air duct from the first air duct from flowing to the mounting cavity, and also prevents the refrigerant flowing sound generated by the refrigerant pipe from spreading to the heat exchange air duct, so that the problem that the refrigerant flowing sound generated by the refrigerant pipe is spread into a room along with the air beam can be solved, and the air outlet noise of the duct type air conditioner is lower.

The utility model discloses an aviation propeller blade convenient to maintain, which relates to the technical field of aviation flight, and comprises a blade, a connector, a power rod, a linear motor and a balancing weight, the left side of the blade is provided with the connector, the connector is arranged on the outer ring of the power rod, the linear motor is arranged in the center of the interior of the blade and the connector, and the balancing weight is arranged in the power rod. According to the equipment, the linear motor is installed at the position of the center point of the inner side of the connector and the inner side of the paddle, it can be guaranteed that the overall gravity center of the paddle is stable, after the linear motor is started, balance can be automatically adjusted under the action of the balancing weight, and the gravity center of the propeller can be changed; therefore, the operation vibration value of the propeller is reduced.

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.

The invention relates to the technical field of vehicle production and manufacturing, in particular to a vehicle door assembly and a vehicle. The outer surface of the plaque structure is flush with the outer surface of the glass, so that the step difference between the glass and the plaque structure can be reduced, wind resistance and wind noise generated when a vehicle runs are reduced, the sliding rails and the sliding blocks can form a sealing structure while the glass is lifted, the friction coefficient of the sliding rails and the sliding blocks can be reduced by arranging the first wear-resistant layers on the side walls of the sliding grooves, and the service life of the sliding rails is prolonged. And a better sealing effect can be achieved through the first wear-resistant layer while a good sliding effect is achieved. And meanwhile, the first sealing piece arranged at the first interval in a matched mode can further achieve a better sealing effect on the gap between the glass and the plaque structure, and therefore the NVH performance of the whole vehicle can be improved.

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 discloses an integrated luggage rack with low wind resistance and wind noise, which comprises a longitudinal beam, the longitudinal beam is a metal integral piece formed by aluminum alloy sections by adopting an integrated servo stretch bending process, and a gasket with the total length slightly larger than the length of the longitudinal beam is arranged on the bottom surface of the longitudinal beam in a cushioned mode. Fitting bodies capable of being clamped into the cavity bottoms of the corresponding ends of the longitudinal beams are formed on the top surfaces, close to the two ends of the liner, of the liner; the longitudinal beam is provided with four supporting bodies used for being fixedly installed on the roof face, and the four supporting bodies sequentially comprise the front supporting body, the first middle supporting body, the second middle supporting body and the rear supporting body from front to back. A double-end bolt used for being connected with the roof face is arranged in each supporting body in a penetrating mode, and straight-line rivet nuts fixedly connected with the upper ends of the double-end bolts are arranged in the longitudinal beams. The utility model has the advantages of light weight, high strength and stable structure, and can effectively reduce wind resistance and wind noise during driving.