14results about How to "Avoid noise problems" patented technology

The utility model belongs to the technical field of household appliances, and discloses a clothes dryer which comprises a box body with a rear side plate, a bearing mounting seat, a fan cover, a bearing and a sealing cover, the bearing mounting seat and the fan cover are arranged on the rear side plate, the bearing is mounted on the bearing mounting seat, the sealing cover is arranged on the fan cover, and the rear side plate and the fan cover define an air channel. The sealing cover is arranged in the air duct, the bearing mounting seat comprises a sunken part which is inwards sunken towards one side far away from the fan cover, the sealing cover and the bottom surface of the sunken part are encircled to form a sealing chamber which is isolated from the air duct, and the bearing is arranged in the sealing chamber. The sealing chamber isolated from the air duct is defined by the sealing cover and the bottom surface of the sunken part, and the bearing arranged in the sealing chamber is isolated and protected, so that the bearing is prevented from being directly exposed in the air duct between the box body and the rear cover plate.

The invention relates to the field of household appliances, in particular to an operation control method of a range hood, the range hood and a computer readable storage medium, and the method comprises the following steps: acquiring first noise data of the range hood when the range hood operates at each gear to determine whether abnormal noise exists when the range hood operates at each gear; if the abnormal sound exists in the range hood, acquiring second noise data of the rotating speed of the range hood from starting to a rotating speed threshold value for the gear with the abnormal sound, and determining a rotating speed interval without the abnormal sound based on the second noise data; based on the rotating speed corresponding to the gear with the abnormal sound, a rotating speed interval which is closest to the rotating speed and does not have the abnormal sound is determined, a final rotating speed which is closest to the rotating speed is selected from the closest rotating speed interval, and the range hood is controlled to operate at the final rotating speed when operating at the gear. Therefore, abnormal noise generated in the operation process of the range hood is avoided.

The utility model relates to the technical field of range hoods, and particularly discloses a fan system and a range hood, and the fan system comprises a fan shell, an impeller, a motor bracket, a motor, a reinforcing piece and an airflow guide piece. The fan shell is provided with an air duct, an air outlet and at least one air inlet, the air outlet and the air inlet are both communicated with the air duct, the motor support is arranged on the fan shell, the motor is installed on the motor support and is in transmission connection with the impeller, and the reinforcing piece is arranged at one air inlet and is at least connected with one of the fan shell and the motor support. The airflow guide member is arranged on the reinforcing member. According to the technical scheme, the structural strength of the fan shell and / or the motor bracket can be enhanced through the reinforcer, so that when the motor works, the vibration of the fan shell and / or the motor bracket is weakened, and abnormal noise caused by the vibration is avoided; and meanwhile, the airflow passing through the air inlet is guided through the airflow guiding piece, so that the impact of the airflow on the fan system is reduced, and abnormal noise caused by airflow impact is avoided.

The utility model relates to the technical field of sunshade curtains, and discloses an auxiliary curtain rolling device of a sunshade curtain, the sunshade curtain comprises a frame, the surface of the frame is provided with two parallel guide rails, the two ends between the two guide rails are both rotatably provided with rolling shafts, the rolling shafts are sleeved with rolling curtain cloth capable of being rolled, and the rolling curtain cloth is provided with a roller. Two push-pull rods used for pulling the roller shutter cloth to unfold are installed on the guide rail in a sliding mode, the auxiliary roller shutter device is installed on the push-pull rods, the auxiliary roller shutter device comprises a tension spring, a pull rope and a tension spring cover, the tension spring is correspondingly embedded in the tension spring cover, the tension spring cover is fixedly installed on the push-pull rods, and the pull rope is connected with the tension spring cover. The two ends of the tension spring are in transmission connection with the positioning guide wheels at the two ends of the winding shaft through pull ropes, the winding shaft is integrally driven to rotate through the tension spring, auxiliary positioning and recycling of the roller shutter cloth are achieved, winding mechanisms at the two ends of the winding shaft are reduced, and therefore the number of parts and installation abrasion are reduced, and abnormal noise generated by torsion springs in the winding mechanisms when the sunshade curtain is opened and closed is avoided. And the service life of the sunshade curtain is prolonged.

The invention discloses an ultra-wideband weak signal detection method and system based on all-optical oscillation and phase-amplitude conversion. The method comprises the steps that spontaneous radiation light generated by an erbium-doped optical fiber amplifier is used as an optical carrier; modulating a weak radio frequency signal to be measured received by an antenna to the optical carrier through an optical modulator to form a modulated optical signal; the modulated optical signal is injected into an all-optical oscillation circuit composed of double loops, the all-optical oscillation circuit generates multimode optical oscillation by adjusting an optical attenuator, and the all-optical oscillation circuit comprises a double-loop interference structure; performing phase-amplitude conversion by adjusting the delay difference of the two light paths in the double loops to form an equivalent microwave photon filter so as to select and amplify the modulated light signal corresponding to the radio frequency signal of the set frequency band; and converting the selected and amplified modulated optical signal into an electric signal, and performing spectral analysis to detect the weak radio frequency signal to be detected.

The utility model provides an improved multifunctional sliding aluminum alloy door and window which comprises a door frame, a fixed door and window is fixedly connected to the right rear side in the door frame in a sealed mode, and the improved multifunctional sliding aluminum alloy door and window is characterized in that a movable door and window is arranged on the front side in the door frame, and the lower portion of the movable door and window and the bottom of the inner side of the door frame are arranged in a sealed sliding mode; the front side of the upper portion of the inner side of the door frame is integrally connected with a hanging type moving assembly, and the lower side of the hanging type moving assembly is fixedly connected with the upper portion of the moving door and window. A fixed door window is hermetically and slidably arranged on the rear side of the movable door window. Due to the arrangement of the mounting plate, the supporting plate, the sliding blocks, the rolling wheels and the connecting plate, the hanging and moving effects can be achieved, the problem that dust is accumulated in a moving structure can be effectively solved, and then the problem that noise is generated when doors and windows are opened and closed can be solved.

The present application provides a kind of sound box's shockproof structure, it includes shockproof locking part, elastic arm and sound box assembly part.Shockproof locking part includes locking hole;Elastic arm is arranged in shockproof locking part;Sound box assembly part is arranged in elastic arm, and shockproof locking part and sound box assembly part are respectively arranged in two ends of elastic arm.Thereby, the present application can assemble shockproof locking part in electronic product, and assemble sound box assembly part in sound box, so that elastic arm is located between sound box and electronic product, and by elastic arm as the buffer and adjustment when sound box resonance, to avoid the vibration of sound box to be conducted to electronic product and produce abnormal sound, and achieve the effect of improving shockproof.

The invention discloses a key noise reduction structure with a cap edge. The key noise reduction structure comprises a base, at least one pressing piece, an elastic body and an upper cover, the base is provided with a circuit board, the pressing piece is provided with a key cap and a cap edge surrounding the key cap, the elastic body is arranged on the circuit board and corresponds to the lower portion of the key cap, the upper cover is combined with the base and provided with at least one key hole, and the face, opposite to the base, of the upper cover is further provided with at least one buffering cushion. The cushion pad is provided with a through hole corresponding to the key hole and is overlapped at the periphery of the key hole; wherein the key cap of the pressing piece protrudes out of the upper cover through the key hole, and the cap edge of the pressing piece is positioned below the buffer pad, so that the rebounded cap edge is prevented from colliding with the upper cover to generate noise.

The utility model discloses a low -noise motorcycle engine cylinder cover belongs to cylinder cover technical field, it includes cylinder cover body, the inside wall of cylinder cover body is equipped with the noise reduction structure, the inside wall center place of cylinder cover body is equipped with cooling structure, the inside center upper place of cylinder cover body is equipped with support structure, the cooling structure includes cavity, the inside wall center place of cylinder cover body is equipped with the cavity, the inside center upper place of cavity is equipped with cooling pipe, in addition, the utility model discloses, can be targeted to attenuate valve knock, gas turbulence etc. high frequency noise, and the noise reduction amount reaches 10 15dB, solve the problem that high frequency noise penetrability is strong, simultaneously, absorb the vibration energy that cylinder body resonance and component low frequency impact produced, and the barrier efficiency improves 20 30%, solved the defect that low frequency noise suppression is insufficient, and, reduce gas leakage noise 8 12dB, also through the rigid vibration transmission of elastic contact reduction cylinder cover and cylinder, avoid resonance and produce additional noise.

This invention discloses a low-noise fan system, comprising: a pneumatic module, a drive module, an air intake module, and an air delivery module; the air intake module is located at the input end of the pneumatic module, the air delivery module is located at the output end of the pneumatic module, and the drive module is connected to the pneumatic module; the air intake module, pneumatic module, and air delivery module are sequentially connected; the pneumatic module includes a first impeller, a second impeller, guide vanes, and a volute; the drive module includes a first motor, a second motor, and a rotating shaft; the first impeller, guide vanes, and second impeller are sequentially arranged and housed inside the volute; the rotating shaft sequentially passes through the first impeller, guide vanes, and second impeller, with the second impeller corresponding to and engaging with the guide vanes; the first motor drives and connects to the first impeller; the second motor drives and connects to the second impeller. The low-noise fan system, through the second motor, can drive the second impeller to rotate in the opposite direction to the first impeller, thereby allowing the first and second impellers to cancel each other out rotational noise.

The utility model discloses an air conditioner, air conditioner includes: casing, heat exchanger, fresh air duct piece, fan assembly, fan assembly is located in the fresh air duct piece, and fan assembly drives outdoor fresh air to enter the fresh air duct piece from fresh air import, and flows into the indoor through fresh air export, fan assembly includes axial flow fan and centrifugal fan, and axial flow fan is adjacent air duct import, and centrifugal fan is located axial flow fan's far side from air duct import, be equipped with the flow guide grating in the fresh air duct piece, and the flow guide grating is located between centrifugal fan and axial flow fan, and the flow guide grating guides outdoor fresh air from axial flow fan to centrifugal fan and adjusts the flow direction of outdoor fresh air. The flow guide grating of the utility model can guide the air outlet of axial flow fan, to make the airflow of passing through the flow guide grating by the direction of rotation guide flow for axial, to recover the rotational dynamic pressure of airflow, improve static pressure, be favorable to improve the air intake efficiency of centrifugal fan, and can improve the air guide volume of fan assembly, and the air guide effect is better.

A display device and a backlight module are disclosed. The display device includes a backlight module and a display panel. The display panel is disposed on the backlight module. The backlight module includes a back plate, a lamp plate, a support column, a buffer member, and a diffusion plate. The lamp plate is disposed on an inner side surface of the back plate. The support column includes a base and a support structure. The support structure extends from the base. The back plate and the lamp plate are sandwiched between the base and the support structure. The buffer member is disposed on a top of the support structure. The diffusion plate is disposed on the lamp plate and the back plate at a distance. The diffusion plate abuts the buffer member. In an embodiment, the backlight module can include an elastic member sleeved on the support structure. Two ends of the elastic member abut the back plate and the base, respectively.

The present invention discloses a range hood structure and a range hood, which includes the above-mentioned range hood structure, so the range hood can avoid the generation of abnormal sounds. The range hood structure includes: a fan blade; a volute, the volute is provided with a mounting cavity and an air inlet and an air outlet connected to the mounting cavity, the fan blade is arranged in the mounting cavity, and the air inlet area of ​​the air inlet and / or the air outlet area of ​​the air outlet are adjustable; and a driving member, the driving member includes a rotating power output end, the rotating power output end is connected to the fan blade, and the rotation speed of the rotating power output end is set to be negatively correlated with the air inlet area of ​​the air inlet and / or the air outlet area of ​​the air outlet. The range hood structure can adjust the rotation speed of the rotating power output end by adjusting the air inlet area of ​​the air inlet or the air outlet area of ​​the air outlet, thereby avoiding the rotating power output end from reaching a specific speed section, thereby avoiding the generation of abnormal sounds.