85 results about "Noise minimization" patented technology

An exhaust port assembly comprising a conduit carries a flow of gas. A vent assembly having a fixed exhaust area is provided on the conduit for venting a flow of exhaust gas from within the conduit to ambient atmosphere. The vent assembly is configured so as to minimize noise associated with the flow of exhaust gas passing to atmosphere, diffuse the flow of exhaust gas passing to ambient atmosphere over a relatively large area, and minimize the area occupied by the venting assembly on the conduit.

A method and apparatus for controlling uplink signal power in a distributed antenna system 10 having a master unit 22 and a plurality of remote units 14 and coupled with a base station 12 includes monitoring a noise condition of the distributed antenna system. The invention dynamically adjusts an uplink gain within the distributed antenna system 10 that is applied to uplink signals to a base station 12, based on the monitored noise condition. Monitoring the noise condition in the distributed antenna system 10 includes monitoring one or more remote units 14 of the plurality of remote units and determining if the remote unit is active status or mute status and then. The uplink gain is increased in response to a decrease in the number of remote units that are active status and decreased in response to an increase in the number of remote units that are active status.

A control method for a spinning cycle in a washing machine is disclosed. The control method for a spinning cycle in a washing machine includes (a) step of performing a water-draining by rotating a motor at a predetermined speed lower than a resonance generation speed and (b) step of performing a main-spinning by rotating the motor at a speed higher than the resonance generation speed. The control method for a spinning cycle in a washing machine according to the present invention has an advantageous effect that over-vibration caused by unbalance may be controlled and that remaining water within the drum is drained smoothly and vibration/noise of a washing machine is minimized.

Disclosed is a washing machine having ball balancers, which adjust a relation between a gap, between the inner wall of a racer of each of the ball balancers and balls, and viscous oil, so as to reduce the vibration and noise of the washing machine. Each of the ball balancers of the washing machine includes balls and viscous oil accommodated in a racer, and the viscosity of the viscous oil is varied in proportion to a gap between the racer and the balls. When the viscosity of the viscous oil is 1˜100 cSt, the gap is set to 0.5˜1.0 mm, when the viscosity of the viscous oil is 100˜380 cSt, the gap is set to 1.0˜2.0 mm, and when the viscosity of the viscous oil is 380˜1,000 cSt, the gap is set to 2.0˜3.0 mm. Thereby, the relation between the gap and the viscous oil is optimized, and the ball balancers effectively exhibit a balancing function and thus minimize the vibration and noise of the washing machine.

An array of uncooled infrared sensors based on a micro-machined temperature sensitive MOS transistor. The sensor array is fabricated using a commercial CMOS process on SOI wafers, followed by backside silicon dry etching for each sensor pixel. Active sensor pixels may include either, an integrator and buffer, or simply the sensing transistor, serving also as the selection device. The transistor bias controls the selected device and the sensitivity of the sensor. PMOS transistors and switched operation are used for noise minimization.

In a brake-by-wire vehicle brake system that uses a solenoid shut-off valve (24a, 24b), the electric power supplied to the solenoid (33) of the solenoid shut-off valve is controlled so as to decelerate a movement of a plunger (31, 32) of the valve as the plunger reaches a point immediately adjacent to a terminal point thereof. Thereby, a highly responsive property can be achieved while the noises that are generated by the plunger striking a stopper (36) or a valve seat (34) can be minimized. When actuating the plunger in the valve closing direction, the solenoid may receive electric power at a first level, a second level lower than the first level and a third level intermediate between the first and second levels in that order.

A motor-driven blower, particularly suited for carpet cleaners and other wet vacuuming appliances, includes a rotating separator cup to impede water droplets and foam from being drawn into the blower. The separator cup is removably connected to a spider bracket that is mounted more permanently to one end of the motor shaft. Since the separator cup is not directly connected to the motor shaft, the cup can be removed without disturbing the rest of the blower. Thus, the blower can be run either with or without the separator cup. Moreover, by not attaching the separator cup directly to the motor shaft, the shaft can be made shorter to minimize vibration and noise at high rpm's.

An anti-rattle tongue plate is provided that includes two different materials for being operably connected to the body of the tongue plate. One of the materials is softer than the other to minimize noise when the tongue plate engages against interior components of the vehicle such as during rough ride conditions. One of the materials is made into a distinct component for being operably connected to the tongue plate body. In this manner, the tongue plate herein eliminates at least one of the insert molds needed for prior over molded latch plates, thus providing manufacturing and cost efficiencies thereover.

A centrifugal fan includes: a housing installed at both sides of a driving motor and having an air suction opening and an air discharge opening; an impeller installed inside the housing and discharging air sucked through the air suction opening through the air discharge opening while being rotated by the driving motor; a motor bracket coupled to one side of the housing and connecting the housing the driving motor; and a noise reducing unit for minimizing a noise of air discharged to the air discharge opening.

A system for grooming pets, including a vacuum and brushes. A canister containing the motor and vacuum impeller elements is well insulated acoustically. A lengthy, acoustically insulated vacuum hose is provided. A grooming attachment is attachable to the working end of the vacuum hose, the grooming attachment being molded and shaped to minimize the noise of air flowing through the attachment under the action of the vacuum motor. Noise attenuation assembly and baffling assembly are provided nearby and aligned with air input and output ports to direct and smooth air flow to reduce noise output of the system.

A multi-threshold complementary metal-oxide semiconductor (MTCMO) bus circuit reduces bus power consumption via a reduced circuit leakage standby and pulsed control of standby mode so that the advantages of MTCMOS repeater design are realized in dynamic operation. A pulse generator pulses the high-threshold voltage power supply rail standby switching devices in response to changes detected at the bus circuit inputs. The delay penalty associated with leaving the standby mode is overcome by reducing cross-talk induced delay via a cross-talk noise minimization encoding and decoding scheme. A subgroup of bus wires is encoded and decoded, simplifying the encoding, decoding and change detection logic and results in the bus subgroup being taken out of standby mode only when changes occur in one or more of the subgroup inputs, further reducing the power consumption of the overall bus circuit.

The present invention relates to a microwave oven, and more particularly, to a structure of a microwave oven that has more enhanced operating efficiency and makes less noise by independently forming a flow of air for a hood function and a flow of air for cooling an electric equipment installation chamber and by mounting an exhaust filter only on one side of an air duct. The present invention utilizes a ventilation motor assembly 132 for forming the flow of air for the hood function and the flow of air for cooling the electric equipment installation chamber. In addition, the flow of air discharged from the ventilation motor assembly 132 is forced to flow toward the air duct 122 which has passages divided into a first duct portion 202 and a second duct portion 204. Moreover, among the duct portions 202, 204, an exhaust filter 122' is installed only on the duct portion through which the flow of air for the hood function passes. Furthermore, the electric equipment installation chamber is formed at the relatively upper side of the cavity is 102 so that electric equipments 104' are installed in a position adjacent to the ventilation motor assembly 132. According to the present invention having such structure, the air flows smoothly in the microwave oven, and noise due to the flow of air is minimized.

A refrigerator provided by the embodiment of the invention includes: a main body having a storage chamber; a door for opening and closing the storage chamber; a thermoelectric module having a coolingsink for cooling the storage chamber and a heat sink for radiating heat sucked by the cooling sink; a cooling fan for circulating air to the cooling sink and the storage chamber; a heat-radiation fanfor flowing outside air to the heat sink; and a control unit for controlling the thermoelectric module, the cooling fan, and the heat-radiation fan, in which when the outside temperature exceeds the set temperature, the control unit can rotate each of the cooling fan and the heat-radiation fan at a high-speed, in which, when the outside temperature is equal to or lower than the set temperature andthe storage chamber temperature is in the upper limit range, the control unit can rotate each of the cooling fan and the heat-radiation fan at a medium-speed lower than a high-speed, and in which, when the outside temperature is equal to or lower than the set temperature and the storage chamber temperature is lower than the upper limit range, the control unit can rotate each of the cooling fan and the heat-radiation fan at a low-speed lower than a medium-speed, and thus there are advantages that the temperature deviation in the storage chamber, which can be generated when the outside temperature is high, can be minimized and noise can be minimized when the outside temperature is not high.

The present invention is a system of geometric guides and baffles for directing and diffusing the external air drawn from a fan blower before distributing the flow evenly to the outlet of a fain filter unit. This arrangement not only reduces the turbulence within a fan filter unit but also maintains the particle count of air drawn through the same system. Furthermore, the present invention is implemented in dimensions substantially similar to that of the fan blower. As such, the present invention minimises noise of a fan filter unit even in confined clean room facility.

The present invention relates to a noise minimization for evaporative canister ventilation valve cleaning. A control system comprising a detection module that detects at least one of a vehicle speed and an engine speed and a canister vent valve control module that selectively modulates the canister vent valve based on at least one of the vehicle speed and the engine speed. A method comprising detecting at least one of a vehicle speed and an engine speed and selectively modulating a canister vent valve based on at least one of the vehicle speed and the engine speed.

A refrigerator of the present invention comprises: an evaporator; a shroud provided with a suction hole for sucking the air heat-exchanged with the evaporator; a fan motor unit provided to the shroud; a discharge panel provided with a discharge hole for discharging, to a storage chamber, the air flowing by the fan motor unit; and a door for opening and closing the storage chamber, wherein the shroud is provided with a fan motor unit provision part at the surface facing the discharge panel so as to provide the fan motor unit thereto, and the fan motor unit enables the air to flow at a position between the shroud and the discharge panel so as to minimize the passage resistance of the air, which is sucked through the suction hole, and minimize noise.

An objective of the present invention is to provide a pneumatic tire whereby primarily rolling resistance is minimized and noise is minimized. This pneumatic tire tread rubber (5) comprises: a cap part (50) which is formed of non-conductive rubber and configures a grounding surface; a base part (51) which is disposed on the inner side of the cap part (50) in a tire radial direction (RD); and conductive parts (52) which are disposed in both of a pair of lateral end parts which are at ends of the cap (50) in a tire width direction, traverse the inner part of the cap (50) while avoiding a location which covers the grounding surface, and form shapes which connect the grounding surface with the bottom surface (50b) of the cap part (50) in the tire meridian cross-section. The conductive parts (52) are provided with extended sites (52b) which branch off outward to the tire width direction (WD) from conductive paths (52a) which connect the grounding surface with the bottom surface (50b) of the cap part (50). The conductive parts (52) are formed of a conductive rubber which has different rubber hardness from the non-conductive rubber which forms the cap part (50).

An air conditioner is provided to uniformly disperse and discharge air supplied to the inside of a body through an outdoor air supplying pipe by an air distributing apparatus. An air conditioner includes an air distributing apparatus(40). The air distributing apparatus includes an air distributing pipe(41) and a plurality of air distributing holes(42). The air distributing pipe is connected to an outdoor air supplying pipe(30). The air distributing holes are formed in the air distributing pipe. The air distributing pipe has a circular shape similar to a bell mouse unit of an air guiding plate guiding air into an inlet side of a turbo fan. The air distributing holes are formed at the internal surface of the air distributing pipe and formed in a micro-hole for preventing sudden decrease of internal pressure of the air distributing pipe.

A method for arranging and operating an array of wind machines to disperse area-wide odors, as generated by municipal waste treatment facilities and the like. The method includes a wind machine positioned to force air across the odor source. The wind machine is preferably a propeller/tower configuration, and most preferably configured for high volume and low RPM operation, to minimize noise. The method also includes the steps of sensing ambient meteorological and plant operation conditions in real time and operating the wind machines in response to stagnant, odor producing conditions. Multiples of wind machines are employed in the preferred embodiment of the method, the siting of the wind machines based upon topographic and historical meteorological conditions. The wind machines can respond to the odor by varying operating parameters such as air flow direction, speed and blade pitch.