43results about How to "Increase pulsation" patented technology

The invention provides a linear compressor. The linear compressor comprises a cylinder, a discharge valve, a spring combination body, and a discahrge cover. The cylinder forms a compression space for a refrigerant; a piston which moves along an axial direction in a reciprocating manner and is inserted into the cylinder. The discharge valve is arranged on one side of the cylinder and selectively discharge the coolant in the compressed space of the cylinder. The spring combination body is combined with the discharge valve. The discharge cover has the spring combination body and has a discharge space for the folow of the coolant discharged by the discharge valve. The discharge valve comprises a plurality of covers which are stacked along an axial direction.

A power conversion device includes a power switching circuit that supplies AC voltages generated between switching elements operating as upper arms and switching elements operating as lower arms, and a control circuit that generates and supplies to the driver circuit signals for controlling the switching operation of the switching elements by a PWM method in a first operational region in which frequency of an AC power to be outputted is low, and that generates and supplies to the driver circuit signals for controlling the switching operation of the switching elements at timings based upon the phase of the AC power to be outputted in an operational region in which the frequency of the AC power to be outputted is higher than in the first operational region.

Thermal type flow rate meters for measuring the flow rate of intake air of an internal combustion engine of a motor vehicle or the like have encountered a problem of an increase in pulsation errors during high engine speed and high pulsation. Meanwhile, digitally recovering responses has posed a problem in which pulsation performance is liable to become worse, affected by variation in a clock or the like. The sensor is provided with means for transferring a response variation factor to the engine control unit. The engine control unit is provided with logics for automatically determining the variation factor and correcting a response. Means for detecting a backflow occurrence is provided and a parameter for a response recovery is changed before and after a backflow occurrence. The sensor is provided with a selecting means by which a sensor response can be selected and obtained and the engine control unit is provided means for allowing selection of a response.

Within a cam ring (8), a rotor having a plurality of vanes (27) is eccentrically disposed. A metering orifice (136) is provided halfway on a discharge passage (135) of pressure fluid discharged from the pump, and a control valve is activated due to a pressure difference between the upstream and downstream sides of the metering orifice (136). A fluid pressure of the first fluid pressure chamber (21) is controlled by activation of the control valve (123). The second fluid pressure chamber (22) is shut off from the control valve (123) to introduce a pressure on the suction side at any time. To return the cam ring (8) in a direction of expanding a pump chamber (11), an internal pressure of the cam ring (8) is applied in the return direction.

A shower water rotating structure includes a main body having a water inlet and water outlet, and a rotating disk, pinion, water inclining support, impeller and rotors arranged top to bottom inside the main body; the water inclining support has inclined water inlet adapted to guide water flow to impact the impeller to rotate the impeller configured with a drive gear adapted to drive the pinion to rotate; the pinion is configured with a guide rod adapted to drive the rotating disk to rotate; the rotating disk is distributed radially with guide grooves for the staged matching with the guide rod; and a lower part of rotating disk is configured with a gear adapted to drive the rotors having an inclined water hole and capable of being rotated in the water outlet of the main body, thereby realize spray having a pulsating rotating water effect.

A hydraulic system comprising a receiving body with electrohydraulic valve, with at least one hydraulic pump, and with channels for connecting the pump to at least one hydraulic load. A pulsation situation arises as a result of the delivery of a pressure medium by the pump and / or as a result of pressure medium being withdrawn by the load. At least one damping unit is provided, having a plurality of pulsation damping means such as, in particular, a damping chamber, and orifice. The hydraulic system provides a uniform and cost-effective solution for different operating situations and prevents a decrease in comfort. The damping unit has at least one switching means for adjusting the action of said damping unit to a varied pulsation situation by connecting or disconnecting one or more damping means.

The external airflow distributed pulsate fluidizing drying apparatus includes drying tank, fluidizing bed, material guiding device and airflow distributor, and features that under each of the fluidizing beds, there are increased 'funnel' tubes with passage cross section varying rate greatly reduced along the material shifting direction. The airflow distributor is outside the drying tank and includes transmission shaft, rotating disc and cylinder shell. The hot airflow performs the double actions of both drying and material transmission.

An oil pump in which pulsation vibration due to the dynamic pressure on the discharge port side can be attenuated. In an oil pump for transporting fluid from a suction port to a discharge port by the rotation of a rotor mounted in a pump casing, a resonator configured from an introduction path and a chamber is formed with respect to a discharge flow channel that communicates with the discharge port in the flow direction of the discharge flow channel. A channel in a direction different to the flow direction of the discharge flow channel is communicatingly formed in the vicinity of the resonator.

The invention discloses a heat dissipation method for a friction surface of a wet clutch of an automobile gear box. The heat dissipation method is characterized in that cooling oil flows in through a flow-in port along the external diameter of a driven disk and then flows out from an oil flow-out port along the internal diameter of the driven disk through a cooling oil tank; the cooling oil rollsand flows in the cooling oil tank to be mixed fully so as to dissipate heat; the cooling water tank consists of a plurality of grid-shaped oil tanks connected in series; the grid-shaped oil tanks arealternately arranged with higher left and lower right or with lower left and higher right in an interlocking way along the radial direction; and the radial direction refers to the radius direction ofthe driven disk. The method has the advantages that: strong partial turbulent flow is produced in a shear layer of the oil flow at the connecting necking of two adjacent grid-shaped oil tanks so as to enhance the momentum exchange and the energy exchange of the oil flow; the reverse sliding of a driving disk and the driven disk on the friction surface produces the annular flow vertical to the flowing direction of the oil tank, so that the oil at a lower temperature constantly rolls to the friction boundary so as to increase the heat transfer temperature difference; and the high and low alternate arrangement of the cooling oil tanks and the depth variation roll the oil flow and enhance the pulsation of the main flow so as to improve the heat transfer effect.

A system for mechanical stimulation of nasal tissues of a patient comprises a catheter assembly connected to a fluid flow generator. The catheter assembly comprises a generally oblong inflatable catheter defining at least one catheter volume and the catheter is configured to assume a shape suitable for insertion into a nasal cavity and to assume a shape suitable for stimulating a nasal tissue. The catheter assembly also comprises a tube part comprising at least one lumen configured to establish fluid flow connection between said fluid flow generator and catheter. Preferably, the catheter assembly comprises at least one vent for releasing fluid or permitting fluid to escape from the generated fluid flow. The fluid flow generator of previous aspects of the invention is configured to generate at least one of a smooth continuous flow, an oscillating flow and a pulsating flow.

The pulsate fluidizing drying machine includes a drying box, a fluidizing bed, a gas flow distributor, and a transmission unit. It features the fluidizing bed with a vibration unit for suspending inside the box, the bed gradually lowered in the material moving direction and the end connected to the material discharging port; the gas flow distributor approaching to the lower part of the fluidizing bed and comprising a transmission shaft, blades on fixed onto the shaft and a baffling board driven with the transmission unit; the increased guide unit below the gas flow distributor and vibrating unit. The present invention operates on pulsate gas flow distributing technology, is favorable to the heat transfer and heat transfer, and has high drying speed, high heat transferring efficiency, low power consumption, less cavitation damage, channeling, etc and excellent operation performance.

An implantable frame includes a plurality of corner structures configured to reduce pressure on a vessel wall and define a pulsatility-enhancing window of the implantable frame. The corner structure may comprise a plurality of adjacent longitudinal struts extending in the longitudinal direction of the vessel wall when placed to shape the vessel wall into a substantially polygonal cross-section and distribute the pressure load of the corner structure between the plurality of adjacent longitudinal struts to improve biocompatibility. The corner configuration also allows for increased shaping of the vessel wall and can provide stretching of the vessel wall to enhance the pulsatility of the vessel wall.

The invention discloses a precise current control method using two-dimensional current chopping for a switched reluctance motor. The current control method is to calculate the current instantaneous speed of the rotor through the position information of the rotor; Database A and database B combine the upper and lower limit curve values ​​"I limit" during the on and off period of each phase current of the motor and temporarily store it in the memory; the core processing unit performs continuous current sampling through A / D, operates the power topology unit, Make the change of the phase current of the motor, during the current on and off of each phase, all within the range of "I limit". Based on the high-performance core processing unit or high-performance core processor, the invention realizes more accurate and efficient motor current control, and then achieves better synthetic torque to achieve more excellent system performance, especially at low speeds. Pulsation and noise, there is a significant improvement effect.

The invention discloses a manual-intervention-type pulsation water injection device. An underground pulsation water injection device comprising a water injection main channel and a pulsation water injection channel is connected in a conventional water injection process pipe string, the water injection main channel and the conventional water injection process pipe string are concentric, the pulsation water injection channel is an energy-storage and high-pressure water-injection channel, and the interior of the pulsation water injection channel is sequentially provided with a pressurization mechanism, an energy-storage mechanism and a pulse control valve from top to bottom. The pulsation water injection method comprises that frequency adjustment of pulsation water injection or closure of pulsation water injection are achieved by placing different blanking plugs, when the blanking plugs are fished out, pulsation water injection is completely started, and starting and closure of manual-intervention-type pulsation water injection and pulsation frequency adjustment are achieved, According to the invention, under the condition that the original water injection process pipe string is not changed, low-frequency high-amplitude pulsation energy is provided for each water injection layer in a unified manner, the flow speed of injected water in the stratum is increased, the sweep efficiency of injected water in a low-permeability, thickened-oil and non-homogeneous oil reservoir is improved, stratum obstruction is eliminated, water injection and oil displacement effect is enhanced, and cost decreasing and benefit increasing are achieved.