12results about How to "Quiet operation" patented technology

This utility model discloses a bottom structure for a dishwasher and the dishwasher itself. The bottom structure is adapted to be arranged on the lower side of the inner tub. The bottom structure includes a base, a flow guide, and a sound insulation plate. A hinge seat is provided on the base. At least a portion of the flow guide is located on the upper side of the base. The sound insulation plate is located on the upper side of the base and is connected to at least one of the flow guide and the hinge seat. According to the bottom structure of the dishwasher of this utility model, by setting a sound insulation plate that cooperates with the flow guide, the noise generated by the water flow impacting the bottom of the inner tub and the motor pump is effectively isolated, making the dishwasher quieter during operation and reducing the impact of operating noise on the user. The sound insulation plate is connected to the flow guide and / or the hinge seat, realizing the integrated design of the sound insulation plate, the flow guide, and / or the hinge seat, which facilitates modular assembly, improves production assembly efficiency, and has a compact overall structure and small space volume.

The invention relates to a pseudo-random high-frequency quarter sinusoidal signal injection method and system for permanent magnet synchronous motor sensorless control, and belongs to the technical field of motor control. The method aims at solving the problems that noise is remarkable, torque ripple is aggravated and rotor position estimation precision is limited due to signal injection during zero-low-speed operation of a traditional high-frequency injection method. According to the technical scheme, the method comprises the following steps: constructing a pseudo-random high-frequency windowing quarter sine injection signal to suppress noise and torque ripple; high-frequency response current containing rotor position information is obtained through Clark transformation and Park transformation; designing a layered second-order generalized integrator band-pass filtering method to accurately extract position signals; and a cosine delay elimination normalization demodulation method is provided to eliminate the influence of the delay effect. According to the invention, synchronous improvement of noise suppression, torque ripple attenuation and rotor position estimation precision is realized, and the system stability and reliability are significantly enhanced.

The utility model discloses a sliding plate support base wheel set which comprises a base and a support, the base and the support are respectively provided with a containing cavity, a spring is arranged between the containing cavity of the base and the containing cavity of the support, a taper groove A assembled with the spring is formed in the containing cavity of the base, a taper groove B assembled with the spring is formed in the containing cavity of the support, and a taper tangent plane A is arranged at the end, making contact with the taper groove A, of the spring. The end, making contact with the taper groove B, of the spring is provided with a taper tangent plane B. The spring is tightly assembled in the taper groove A of the base through the taper tangent plane A. The spring is tightly assembled in the taper groove B of the support through the taper tangent plane B. Through the design, the spring is tightly connected with the base and the support, when the spring is used for a long time, the taper grooves of the support and the base become wider under friction and extrusion of the spring, connection between the spring and the taper grooves is more compact under the axial pressure of the spring, the action is more accurate in the using process, operation is quiet, and the service life of the spring is prolonged. The sliding plate support base wheel set is particularly suitable for sliding plates, land impact plates, sliding plate frames and other related products.

The invention discloses an active supercharging device for an automobile braking system, and relates to the technical field of supercharging devices, the active supercharging device comprises a cavity, a partition plate is arranged in the cavity, an air inlet pipe is arranged on the cavity in a communicating mode, an air outlet pipe is arranged on one side of the cavity in a communicating mode, and a rotating shaft is rotationally connected to the partition plate; a first turbine is fixedly connected to one end of the rotating shaft, a second turbine is fixedly connected to the other end of the rotating shaft, a noise reduction mechanism is arranged on the air outlet pipe, the noise reduction mechanism comprises an outer sheath, an inner sheath, a connecting plate, sound absorption cotton, a connecting bolt and a first spring, and the air outlet pipe is fixedly sleeved with the outer sheath. The air outlet pipe can be protected by arranging the outer sheath and the inner sheath, noise generated during air compression can be absorbed by arranging the first spring and the sound absorption cotton, so that the supercharger operates more quietly, and the sound absorption cotton is conveniently taken out for replacement by arranging the connecting bolt.

The utility model provides a panel assembly integrating a glass direction switch box and an inner handle. The panel assembly comprises a decorative plate, a decorative plate decorative strip, a handle, a handle panel, a rotating shaft, a torsion spring, a buffer cushion and the glass direction switch box. The decorative plate is provided with a first installation hole, and the decorative plate decorative strip penetrates through the first installation hole to be fixedly connected with an installation structure on the decorative plate in a clamped mode. The handle is provided with a second mounting hole, and the decorative plate penetrates through the second mounting hole to be connected with a first hook structure arranged in the handle in a clamped mode. The handle is provided with symmetrical third mounting holes, the handle panel is provided with corresponding fourth mounting holes, and the rotating shaft sequentially penetrates through the fourth mounting holes, the torsion springs and the third mounting holes to enable the handle to be connected to the handle panel in a pivoted mode. The problem of abnormal sound caused by reset collision is effectively solved, the quality feeling of the whole automobile is improved, the number of independent parts is reduced, the utilization of the internal space of the automobile door is optimized, and the assembling procedure is greatly simplified through the connecting modes of clamping, hooking and the like.

This utility model discloses a bass bearing with noise reduction function, including a hollow corrugated shell, an outer ring fixedly installed inside the hollow corrugated shell, and an inner ring rotatably installed inside the outer ring. Both ends of the inner ring surface are fixed with cages, and several equally spaced balls are embedded inside the cages, contacting the inner wall surface of the outer ring. A rubber bushing is fixed to the inner wall of the inner ring, and a fan-shaped protrusion is integrally formed on the outer wall of the rubber bushing. The end of the fan-shaped protrusion extends outward and penetrates to the outside of the inner ring. This utility model, through the interlocking structure of the inner ring, rubber bushing, fan-shaped protrusion, and cage, allows the inner ring to roll and rub against the outer ring via the cage and balls. During this rolling friction, the rubber bushing in the inner ring continuously contacts the double-wing elastic oil overflow structure via the fan-shaped protrusion, causing grease from the polyurethane foam block to overflow.

The invention discloses chain direct-drive type vertical circulation mechanical parking equipment, and relates to the technical field of parking equipment, the chain direct-drive type vertical circulation mechanical parking equipment comprises a frame, a circulation chain, a tray, at least one primary unit and a plurality of secondary units, and the tray is connected to the circulation chain; the primary unit is fixedly arranged on the frame; the secondary units are fixedly arranged on the circulating chain and are distributed along the extending direction of the circulating chain; a gap is formed between the primary unit and the secondary unit, when the primary unit is powered on, electromagnetic induction is generated between the primary unit and the secondary unit, the secondary unit is driven to drive the circulating chain to operate, and the parking equipment is simple in transmission chain, low in failure rate, high in efficiency, low in operation noise and compact in structure.

This utility model relates to the field of chemical reactor technology, and particularly to a chemical reactor with vibration damping and noise reduction functions. It includes a fixed ring, with three support rods fixedly connected to the outer surface of the fixed ring. Each of the three support rods has a vibration damping and noise reduction structure fixedly connected to its lower end. A chemical reactor body is fixedly sleeved inside the fixed ring. A first mounting plate and a second mounting plate are fixedly connected to the outer surface of the chemical reactor body, with the first mounting plate located below the second mounting plate. A control mechanism is fixedly mounted on the upper end of the first mounting plate. This utility model's chemical reactor with vibration damping and noise reduction functions, through the synergistic action of dampers and springs, significantly reduces the vibration intensity transmitted to the fixed block, reduces the propagation of vibration to the ground and the vibration amplitude of the chemical reactor body, effectively suppresses noise generated by vibration, ensures continuous operation of the chemical reactor body in a quiet and stable state, extends the service life of the equipment, and improves the production environment.

The invention discloses a laser depilation control and depilation instrument supporting sliding type continuous treatment, and relates to the field of beauty instruments. The method comprises the steps that in the process of moving a treatment head, skin images are collected in real time to obtain continuous image frames, and the linear acceleration and the angular velocity of the treatment head are collected; performing hair follicle target recognition on the image frame, extracting the position of a hair follicle, generating a data packet containing a timestamp and a target coordinate, and inserting the data packet into a task queue according to the timestamp; according to the linear acceleration and the angular velocity, the instantaneous velocity and the motion direction vector of the treatment head relative to the skin are obtained; and sequentially reading the data packets from the task queue, extracting target point coordinates from the data packets to perform laser irradiation, and performing fine adjustment compensation on the laser irradiation position according to the instantaneous speed and the motion direction vector. A sliding continuous treatment scheme is provided, and efficient, comfortable and quiet hair removal experience is achieved.

This utility model relates to the field of energy storage cabinet heat dissipation technology, and more particularly to an energy storage cabinet heat dissipation system, comprising: a cabinet body, with a battery chamber and a liquid cooling chamber inside; the battery chamber is equipped with a temperature sensor and a first liquid cooling plate; the liquid cooling chamber is equipped with a liquid cooling unit; the liquid cooling unit includes an inlet pipe, both the temperature sensor and the inlet pipe are connected to a circulating pump, the circulating pump is connected to a radiator through a first regulating valve, the circulating pump is connected to a heat exchanger through a second regulating valve, the radiator is connected to a cooler and a heat exchanger respectively, the cooler is connected to a cooling fan, the heat exchanger is connected to a heater and a gas-liquid separator respectively, the heater is connected to the first liquid cooling plate through an outlet pipe, and both the cooler and the gas-liquid separator are connected to an air compressor. This utility model's energy storage cabinet heat dissipation system can more quickly and effectively remove heat from the energy storage battery, ensuring that the battery can operate at a suitable temperature, improving battery performance and lifespan.

The utility model provides a fan cover of quick assembly and disassembly relates to fan technical field, include: fan machine head, the fan machine head front is equipped with fixed net cover, the fixed net cover front is equipped with installation net cover, the fixed net cover inner peripheral surface is equipped with four place adjustment subassembly, through the rectangular socket of elastic buckle and connecting sleeve frame is connected, by spacing insertion rod and support plate intercoordination, and utilize the elastic action of compression spring, can make installation net cover and fixed net cover quick stable connection, whole assembly process does not need to use tool and screw connection fixed, facilitates daily cleaning, season storage, quick dismounting and reinstallation can reduce user's operation time, let the process of maintaining fan be easier, solved when carrying out daily cleaning, season storage to fan, fan cover dismounting process is troublesome and laboursaving, and the maintenance difficulty is bigger, and the fixed screw of fan cover can be loose, leads to the front and back guard cover vibration to produce bigger noise, influences user experience problem.

This utility model discloses a handheld mixer, including a main housing, a driver disposed within the main housing, a stirring protective shell installed at the lower end of the main housing, a cutter shaft rotatably installed within the stirring protective shell, and a blade disposed at the lower end of the cutter shaft. The key feature is that a second connector is provided at the upper end of the cutter shaft, and a first connector is movably mounted at the lower end of the driver's output shaft. The first connector and the output shaft are coupled via a first movable shaft coupling structure so that rotation of the output shaft drives rotation of the first connector. The first connector and the second connector are coupled via a second movable shaft coupling structure so that rotation of the first connector drives rotation of the second connector. During operation, the female connector can automatically find its equilibrium position under centrifugal force, achieving dynamic self-centering, thereby greatly improving rotational balance and avoiding vibration and noise problems caused by insufficient coaxiality.