506results about How to "Improve mute effect" patented technology

The invention discloses an air intake device used for a dust collector and the dust collector. The air intake device comprises a base, an outer cover of a motor, an inner cover of the motor, the motor, an upper cover of the motor, an air collecting cover, a first sealing ring and an air intake cover of the motor. The upper edge of the outer cover of the motor is provided with a second slot, and the outer cover of the motor is provided with an air outlet. The inner cover of the motor is provided with a through hole communicated with the air outlet. The lower edge of the upper cover of the motor is inserted in the upper edge of the inner motor of the motor, and the upper cover of the motor is provided with an upward opening. The top wall of the air collecting cover is provided with first through holes opposite to the opening. According to the air intake device used for the dust collector, noise, transmitted from inside to outside, generated from the inside of the air intake device is filtered primarily in a second silencing cavity, and filtered secondarily in a third silencing cavity, thus the noise generated by the air intake device is isolated effectively and noise of the complete dust collector is lowered greatly. Therefore, the dust collector is a good silent or super-silent product.

The invention provides a slide rail mechanism. The slide rail mechanism comprises first slide rail assemblies and second slide rail assemblies which are arranged oppositely, and a synchronizing mechanism, wherein each slide rail assembly comprises an upper rail, a middle rail and a lower rail which are in sliding fit with one another; the synchronizing mechanism is used for keeping the first slide rail assemblies and the second slide rail assemblies move synchronously; the synchronizing mechanism comprises steering parts, fixing parts and tensioning parts arranged on the two groups of slide rail assemblies; the tensioning parts are wound between the fixing parts of the two groups of slide rail assemblies through the steering parts; the steering parts comprise front steering parts and back steering parts fixed at the front and back ends of each middle rail respectively; the synchronizing mechanism further comprises a tension sleeve arranged between the two back steering parts; the lengths of the tensioning parts between the two back steering parts are greater than the distance between the two back steering parts; portions, which are positioned between the two back steering parts, of the tensioning parts are inserted into the tensioning sleeve; other portions, which are positioned outside the tensioning sleeve, of the tensioning parts are always in tensioned states, so that the two groups of slide rail assembles move synchronously.

The invention provides a multi-functional ventilating fan. The ventilating fan comprises a box body, an illuminating lamp and the lamp shade thereof and an air exhaust device arranged inside the box body; the box body is provided with a partition board, a top cover plate and a bottom cover plate, an air inlet pipe of the air exhaust device protruding from the bottom part of the box body is arranged on the bottom cover plate; a section of air inlet pipe and an air inlet grille or an air inlet slot are also arranged on the lamp shade, the air inlet pipe of the lamp shade is abutted with the air inlet pipe protruding from the bottom part of the box body, and the lamp shade is installed on the pinch plate of the ceiling plate; an air outlet opening leading to the outside and one or more than two air inlet openings leading to the inside are arranged on the side walls of the box body. The air exhaust device realizes the switching of the air exhaust communication among the air inlet openings and various air outlet openings, and the air outlet opening is connected with the air outlet pipe fittings. The multi-functional ventilating fan has the advantages that the air inlet pipe is arranged on the lamp shade, thus the lamp shade can be abutted with the air inlet pipe at the bottom of the protruding box body on the bottom cover plate, the illuminating lamp and the illuminating lamp shade are arranged below the ceiling plate, so that the shape and the size of the illuminating lamp shade are not related with the size and the shape of the box body, and a foundation is provided for the diversified appearance design of the ventilating fan.

The purpose of the intake system, which is disposed in a limited space above the engine, is to improve engine performance by preventing increase in both temperature and resistance of intake air, and also to reduce noise of the intake air. In the intake system, a rear wall extending downwardly is formed in a lower half body that is joined to a rear end of an engine cover, and a mounting frame section for attaching an element is formed in a rear wall section. An upstream-side casing is formed forward of the rear wall section. An intake duct has a downstream end connected to a front surface of the upstream-side casing adjacent to a transmission. Further, the intake duct extends widthwise of the vehicle and has an upstream end opened to the side edge of the engine cover adjacent to the transmission. A resonance chamber casing is joined to the side departing from the transmission through a communication pipe forward of the upstream-side casing. The resonance chamber casing is formed to extend along the full width of the engine cover so as to cover the front of the intake duct.

The invention relates to the technical field of water pumps and in particular relates to an integrated shaft-free motor axial flow pump. The integrated shaft-free motor axial flow pump comprises a pump enclosure of which the two ends are provided with connecting flanges, wherein the middle of the inner hollow cavity of the pump enclosure is provided with a pump impeller; the inner hollow cavity of the pump enclosure on the downstream side of the axial flow pump is provided with a guide vane; the outer edge of the pump impeller is provided with a rotor fixing ring; a driving motor rotor is assembled on the rotor fixing ring; the rotor fixing ring is fixed on the inner side of the pump enclosure by virtue of a fixed ring bearing; the part, corresponding to the driving motor rotor, on the inner side of the pump enclosure is provided with a groove; and a driving motor stator is assembled in the groove. The integrated shaft-free motor axial flow pump disclosed by the invention is characterized in that the shaft-free motor and the axial flow pump are integrated into a whole, so that the axial flow pump can be integrally installed in the straight pipe section of a pipeline, and the compactness and mute effect of the axial flow pump can be obviously improved. The integrated shaft-free motor axial flow pump has the advantages of simple system arrangement, small occupied space and easiness for construction and design.

The invention relates to the field of electrical design, and discloses a thermostatic silent cabinet, which comprises an internal rack, a main body frame and a shell, wherein the main body frame is arranged in the shell; the internal rack is arranged on the main body frame; an interlayer is arranged on each of the six surfaces of the shell; soundproof cotton is arranged in each interlayer; outlet holes are reserved on an upper top plate and a lower bottom plate of the shell; detachable sealing caps are arranged on the outlet holes; a ventilation air duct is also formed in the interlayer of the shell; an air inlet and an air outlet of the ventilation air duct are communicated with the interior of the internal rack and the outside of the shell; a plurality of diversion barriers are arranged in the shell, and are arranged between the air inlet and the air outlet respectively; and each diversion barrier is extended from an inner cavity of the shell, and is obliquely arranged along a direction from the air inlet to the air outlet. By using the technical scheme, equipment noise, electromagnetic radiation and external dust can be effectively blocked, and good ventilation and radiation effects are kept.

The invention relates to hardware door lock accessories, and provides a noiseless lock with magnets. The noiseless lock with the magnets is provided with a box bottom assembly, a box cover, a rotation block, a lever-handle sleeve, a tension spring, a driving block, a reset spring, a lock tongue assembly and a cover buckling assembly. The front end of the box bottom assembly is provided with a lock tongue hole, and the inner portion of the box bottom assembly is provided with a rotation piece pivot, a lever-handle sleeve embedding hole, a lock tongue guide groove, a driving guide groove and a fixed tension spring embedded column. The lock tongue magnet is arranged in a lock tongue and the box buckling magnet is arranged in the box buckling assembly. The lock tongue assembly is embedded into the lock tongue guide groove, the driving block is embedded into the driving guide groove, the lever-handle sleeve is embedded into the lever-handle sleeve embedding hole and the rotation block is embedded on the rotation pivot through a pivoting hole in the middle of the rotation block. The noiseless lock realizes the function that under the attraction effect of the magnets, locking is realized as the lock tongue stretches out directly, achieves the effect that noise generated due to the fact that collision and friction are generated between the inclined lock tongue and the cover buckling assembly when a door is closed is eliminated and achieves a better silencing effect.

Provided is a cold-finished seamless steel pipe for an integrally molded drive shaft, which is obtained by cold-extracting a material pipe hot-rolled by the Mannesmann piercing method. In order to retain the maximum inner face wrinkle depth of 0.1 mm or less of the seamless steel pipe for the drive shaft and the maximum wrinkle depth of 0.20 mm or less of the inner face at the internal diameter reduction ratio of 30 % or more in the radially reduced portion, the material used is the steel of the kind having specific chemical compositions. This steel material is subjected to a piercing-rollingtreatment by the Mannesmann method, and is adjusted in the hole molding shape in the routine rolling after drawing-rolled, and then adjusted in the thickness treatment in the later cold-extraction. Asa result, the seamless steel pipe can retain excellent torsional fatigue characteristics as the integrally molded automotive drive shaft having radially reduced portions at its two end portions, so that it can be used as a hollow member optimum for weight reduction and quietness. As a result, the automotive drive shaft can be efficiently manufactured.

The invention discloses an anti-raise specialistic floor and a production method thereof. The floor comprises a substrate (1), wherein a finish paint layer (2), a resin layer (3) and a primer layer (4) are sequentially laid above the substrate (1) from top to bottom; a back paint layer (5) is laid below the substrate (1); wood fiber conduits (6) of the substrate (1) are filled with resin (7); the substrate (1) is provided with a tongue-and-groove (8); and the surface of the tongue-and-groove (8) is laid with a wax layer (9). In the production process of the floor, a finished product is obtained through the production steps of: hacking, sanding, back paint coating, resin permeating, primer coating, resin retouching, finish paint coating, tongue-and-groove wax sealing, and the like. The product has excellent characteristics of preventing expansion, contraction and raising. The wood fiber conduits of various surfaces are effectively sealed, which can effectively prevent water from entering and draining to ensure that the floor per se has relatively stable internal environment so as to prevent the solid wood floor from raising, deforming and cracking.

The invention relates to a novel cooling fan, and is designed to solve the technical problem that a dust removal structure, a motor assembly mounting structure, an easily damaged chip repairing structure and a quick mounting structure in an existing like product are poor in design. An outer frame of the cooling fan is square, square extension side surfaces are respectively arranged on an upper cavity opening and a lower cavity opening of a cylindrical fan blade cavity of the outer frame of the fan, screw holes are respectively formed in end corners of the upper extension side surface and the lower extension side surface, and a motor assembly is fixedly arranged on a middle tube of the outer frame of the fan. The key point is as follows: an inner housing is arranged on one side of the outer frame of the fan, filter cotton and an outer mesh enclosure are arranged at an opening of the inner housing, and the filter cotton is fixed at the opening of the inner housing through the outer mesh enclosure; and a ventilating net and vibrating motors are arranged at the inner diameter of the inner housing, and one end of each vibrating motor is propped against the filter cotton. A screw hole in the other side of the outer frame of the fan is connected with a screw hole of a plate body through a fixing clamping hook, and a chip module is arranged in a chip groove between the upper extension side surface and the lower extension side surface on one side; and a motor coil of the motor assembly is fixed on the middle tube of the outer frame of the fan through a buckle ring.

The invention provides a slide rail mechanism. The slide rail mechanism comprises first slide rail assemblies and second slide rail assemblies which are arranged oppositely, a synchronizing mechanism and a motor assembly, wherein each slide rail assembly comprises an upper rail, a middle rail and a lower rail which are in sliding fit with one another; the synchronizing mechanism is used for driving the first slide rail assemblies and the second slide rail assemblies move synchronously; the synchronizing mechanism comprises steering parts arranged on the two groups of slide rail assemblies, fixing parts and tensioning parts; the tensioning parts are wound between the fixing parts of the two groups of slide rail assemblies through the steering parts; the motor assembly is provided with a first connecting portion and a second connecting portion for winding or releasing the tensioning parts; two portions, which are positioned on the front and back sides of the same fixing part, on the tensioning parts are connected to the first connecting portion and the second connecting portion respectively in a winding way; during working of the motor assembly, the tensioning parts are contracted through one of the first connecting portion and the second connecting portion, and the other releases the tensioning parts to move the tensioning parts, so that the middle rails and the upper rails ae driven to move through the fixing parts.

The invention relates to a bladeless fan which comprises a base and a fan chimney arranged at the upper end of the base. An air inlet is formed in the side face or the bottom of the base, an impellerand a motor for generating airflow are arranged in the base, a big-end-down flared air outlet is formed in the upper end of the base, a connecting sleeve is arranged at the lower end of the fan chimney, a big-end-down flared air inlet hole is formed in the connecting sleeve, a large end of the flared air inlet hole is connected with a small end of the flared air outlet of the base, a small end ofthe flared air inlet hole is connected with a bottom opening of the fan chimney, a vertical channel for receiving the airflow is arranged in the fan chimney, the center of the vertical channel and thecenters of the flared air inlet hole and the flared air outlet are positioned on the same straight line, at least one row of longitudinally distributed air outlet narrow slits are formed in the surface of the fan chimney, and the airflow received by the vertical channel is jetted outwards from the air outlet narrow slits. The bladeless fan has the advantages of balanced and stable airflow, stability, comfort, high flow, strong wind power, reasonable structure, attractive appearance, low noise, convenience in disassembly and assembly and the like.

The invention relates to a heat pipe heat radiating system of a digital light processing (DLP) projector. The system comprises an optical main body, a cover body for sealing the optical main body and a cooling device for conducting and radiating the heat generated by the optical main body, wherein the cooling device comprises a heat radiator, a heat conductive board and a heat pipe for connecting the heat radiator and the heat conductive board; the heat conductive board is tightly jointed with the heat source of the optical main body; the heat conductive board is arranged in the cover body; the heat radiator is arranged outside the cover body; and the heat pipe is connected with the heat conductive board and the heat radiator. The heat pipe heat radiating system of the DLP projector reduces the temperature of the optical main body so as to reach the optimal working temperature of the DLP projector, avoids the pollutions of dirt and dust on the optical main body so as to reach the effect of preventing the dust and reducing the temperature, and has good mute effect.

The invention discloses a cross-flow impeller, a cross-flow fan and a wall air conditioner. The cross-flow impeller comprises a plurality of blades which are arrayed at intervals in the circumferential direction and a supporting plate which is connected with the blades and is used for supporting the blades. The outer diameters of all the axial positions of the cross-flow impeller are the same. According to the cross-flow impeller, due to the fact that the outer diameters of all the axial positions are the same, the air outlet speed of the blades is good in uniformity, transverse vortexes are effectively restrained, and a good mute effect is achieved. Through the test, the cross-flow impeller can lower the aerodynamic noise of the blades by more than 1 dB, the sound quality can be well improved, and the blast capacity cannot be lowered.

The invention discloses an operating method for an electric hydraulic water spraying unit of a ship propulsion system. When an electric hydraulic water spraying propulsion device is started to advance, a storage battery pack supplies power to bidirectional oil hydraulic pump stations through circuits, and through a circuit control center, the two or more bidirectional oil hydraulic pump stations on the two sides are controlled simultaneously to control hydraulic cylinders on the two sides to simultaneously advance and retreat correspondingly; and a water pressure piston in a water pressure cabin on the other side retreats while a water pressure piston in a water pressure cabin on one side advances, and the water pressure pistons in the water pressure cabins on the two sides conduct propulsion alternately according to advancing and retreating to push a ship or an underwater vehicle to navigate. The hydraulic cylinders are driven through the storage battery pack and drive the water pressure pistons to travel to and from the interior of the water pressure cabins, water in the water pressure cabins is pressurized, and thrust of water spraying acts on a ship body to advance forwards; and the mute effect is good, energy conservation and emission reduction are achieved, and safety of the ship and the underwater vehicle navigating underwater can be guaranteed.

A rotation blade 70 used for a drain pump includes: a plurality of plate-like large-diameter blades 60 extended in the radial direction from a shaft part 52 connected to an output shaft of a motor; a plurality of plate-like small-diameter blades 54 connected to the lower edge parts of the large-diameter blades 60; and auxiliary blades 68 disposed between the large-diameter blades adjacent to each other. On the outer circumferences of the large-diameter blades and the auxiliary blades, step parts 72, 74, 82 and 84 which guide water current stirred up by the blades toward the outer side of the blades are disposed. By the step parts, the flowing of the drain water into a space on the back side of the blades can be suppressed and, therefore, vibration and noise can be suppressed even when the ejection ability is improved. The drain pump has the advantages that the improvement of discharging capability and operation silence are guaranteed.

The invention discloses a motor for a ship and a vibration and noise reduction method thereof. A three-phase asynchronous motor for the exiting ship is improved from two aspects of reducing the electromagnetic exciting force and preventing the superposition of the frequency of the electromagnetic exciting force with the inherent frequency of a motor stator core, so that the low-frequency vibration generated by the electromagnetic exciting force is maximally avoided or weakened, and the high-frequency vibration is reduced. According to a principle that if the underground vibration frequency is lower, the vibration transmissibility is stronger, the low-frequency vibration acceleration level and the total vibration level of the three-phase asynchronous motor for the exiting ship can be greatly reduced, so that the mute ability of the ship is improved, and the distance of the ship discovered by sonar equipment is reduced.

The invention discloses a control method for an air conditioner. The control method comprises the following steps that a refrigerating minimum air speed mode of the air conditioner is started; in each operation cycle of a compressor, an indoor air returning temperature T is detected and compared with a preset value; when T is larger than or equal to T1, the air conditioner is controlled to meet the conditions that first, the operation frequency of the compressor is adjusted to f1, second, the air speed of an indoor fan is adjusted to x1%Vmax, and third, the opening degree of an air guide plate is adjusted to y1%Hmax, and the air guide plate is made to swing within the range of y1%Hmax-Hmax; and when T is smaller than T1, the air conditioner is controlled to meet the condition that fourth, the operation frequency of the compressor is adjusted to f2, the fifth condition is that the air speed of the indoor fan is adjusted to x2%Vmax, and the sixth condition is that the opening degree of the air guide plate is adjusted to y2%Hmax. The control method for the air conditioner is beneficial to improving the muting effect of the air conditioner and the comfort degree of a user.

The invention provides a water-channel water-returning littoral combat ship and belongs to military equipment. The water-channel water-returning littoral combat ship comprises a ship body, a middle cabin, a lateral cabin, a base plate, a water inlet, a water-passing channel, a propeller and a water outlet, and is characterized in that: a bottom cabin is a rectangular cube; the water-passing channel with four surfaces being closed is arranged in the rectangular cube; the propeller is arranged in the water-passing channel; and water passes through the water-passing channel from the water inlet and is removed from the water outlet, so as to realize the advancing of the combat ship. Compared with the prior art, the water-channel water-returning littoral combat ship has the advantages of simple structure, adaptation to fluid mechanic law, small resistance, high speed, shallow drafting, silence, small target, wide moving area, strong adaptive capacity and excellent popularization and application values.

The invention discloses a floor board provided with a self-leveling keel. The floor board comprises the keel and a floor board block arranged on the keel, wherein the keel comprises a mounting part, a self-adaption part and an adjusting connecting part by which the mounting part is arranged at the self-adaption part; the self-adaption part comprises a plurality of keel joints; the floor board block comprises a floor board block body and mounting sliding bars arranged on two sides of the floor board block body; the mounting part comprises mounting slide chutes arranged on two sides of the mounting part body and matched with the mounting sliding bars; the adjusting connecting part comprises a plurality of adjusting connecting parts corresponding to the keel joints one by one; one end of each adjusting connecting part is hinged with the corresponding keel joint, the other end of the adjusting connecting part is fixedly connected with the mounting part, and the adjusting connecting parts are used for adjusting the perpendicular distance between the keel joints and the mounting part. The floor board has the characteristics that the floor board is provided with the floor keel capable of keeping silence always and free of noise and the mounting flatness is high.

The invention discloses a closed type air washing machine. The washing machine comprises a laundry barrel in an outer box, and the upper end of the laundry barrel is matched with a sealing cover; the laundry barrel is internally provided with a damping net cover of which the position can be adjusted up and down randomly; the damping net cover is provided with a damping net; the center of the bottom of the laundry barrel is provided with a spiral atomizing nozzle; the spiral atomizing nozzle is connected to an air compressor through a check valve and a pipeline, and an air heater is arranged on the pipeline between the spiral atomizing nozzle and the air compressor; the side edge of the bottom of the laundry barrel is communicated with a drainage pipe; the drainage pipe is provided with a normally closed solenoid valve; the upper end of the inner wall of the laundry barrel is communicated with a vent pipe; the vent pipe is connected to an ozonator through a three-way solenoid valve; the ozonator is connected to the air compressor; the air compressor is provided with a circulating water cooling system; a circulating water inlet pipe of the circulating water cooling system is communicated with one side of the bottom of the laundry barrel, and a circulating water outlet pipe is communicated with the other side of the bottom of the laundry barrel. Through the closed type air washing machine, water and clothes can be sterilized and disinfected in the whole course, the washing effect is stronger, and the energy consumption is lower.

An air conditioner indoor device includes: intake openings (2a, 2b) for sucking indoor air; a heat exchanger (6) which performs heat exchange with the sucked air; an indoor fan (8) which feeds the air subjected to the heat exchange by the heat exchanger (6); and an outlet (10) for blowing out the air fed from the indoor fan (8). An electrostatic atomization device (70) is arranged on the air conditioner indoor device. The electrostatic atomization device (70) includes a discharge electrode (72), an opposing electrode (75) arranged to oppose to the discharge electrode (72), a high voltage power source (24), and a Peltier device (36) which condenses moisture in the air and supplies water to the discharge electrode (72). The high voltage power source (24) applies a high voltage between the discharge electrode (72) and the opposing electrode (75) so as to generate an electrostatic mist. Moreover, the opposing electrode (75) is formed in such a shape that the inner surface (75b) of the discharge electrode (72) is a dome-shaped ring.

The invention discloses a fermentation mixing device with a self-cleaning function for chemical production. The device comprises a tank body and support legs, wherein a jacket is arranged on the outerwall of the tank body; the support legs are arranged at the bottom of the jacket and are fixedly welded on the jacket; a feeding port is formed on one side of the top end of the tank body; a motor base is arranged on the outer wall of the top end of the tank body; a stirring motor is arranged above the motor base; a stirring shaft is arranged on the inner wall of the tank body; the stirring shaftis connected to the stirring motor; a plurality of stirring rods are uniformly arranged on the stirring shaft; self-cleaning scraper devices are respectively arranged on the stirring shaft; the stirring rods and the self-cleaning scraper devices are fixedly connected to the stirring shaft respectively; one side of the stirring shaft is provided with a spiral lifting plate which is far from the stirring motor; and a first discharging port is arranged at the bottom of the tank body. In the stirring process, the utility model can lift up materials deposited at the bottom of the tank body, so that the mixing effect is better, the continuous fermentation process can be realized, and the fermentation effect is good.