31results about How to "Reduce ejection speed" patented technology

A laminated-type piezoelectric element includes first electrode layers defining individual electrodes, second electrode layers defining common electrodes, and piezoelectric sheets sandwiched between the first and second electrode layers. The first and second electrode layers are laminated alternately. Each individual electrode has a substantially rectangle shape extending in a first direction. The individual electrodes defined in each first electrode layer are arranged at predetermined intervals in a second direction perpendicular to the first direction, to form a row. The common electrode includes a first portion having a band shape. The first portion overlaps the row when viewed in a plan view. The first portion has a pair of edges extending to be perpendicular to a long side of the rectangle shape of each individual electrode. Both ends of each individual electrode in the first direction protrude to outer positions than the edges, when viewed in the plan view.

In an ink jet printing apparatus that ejects a plurality of kinds of pigment inks in small droplets, the drive pulse waveform to be applied to each of the heaters is adjusted according to the viscosity of the ink in a way that assures that the lengths of liquid columns ejected are approximately equal among different colors. This enables the dot areas formed on a print medium to be constant among different colors, realizing an image output with excellent color reproducibility, free from variations in image density and tonality.

The invention relates to the technical field of household gas stoves, in particular to a three-ring fire burner and a gas stove, including a gas distribution seat, and the top of the gas distribution seat is sequentially provided with an outer ring fire cover and an inner ring fire cover. There are several fire holes on the inner side of the fire cover, and fire grooves are arranged between the fire holes. The gas outlet direction of the fire holes and fire grooves points to the central area of ​​the burner. Injection tube, in the present invention, by setting the fire hole and the fire groove pointing to the central area of ​​the burner, heat can be collected and burned, the heating efficiency can be improved, and the heat loss can be reduced. By setting the second fire hole and the third fire hole, it can Increase the area of ​​the fire hole. By setting the partition, the structure of the inner ring fire cover can be made more compact, which can reduce the volume of the top of the burner, increase the heat exchange time and heat exchange area between the bottom of the pot and the flame, and improve the efficiency of gas consumption. The thermal efficiency of the stove is improved, and the cost of the burner is reduced.

The invention discloses a small-sized air compressor for environmental protection construction and its use method, which belongs to the field of air compressors. It uses the principle of aerodynamics to make two pneumatic parts approach each other under the action of air flow, so that the front and rear sections There is a large mutation in the area to improve the noise reduction effect, and the greater the airflow intensity, the greater the change in the cross-sectional area of ​​the aerodynamically deformable shell, and the better the noise reduction effect. The annular cavity inside the aerodynamic weakening part is used to weaken the airflow The flow rate, and two air inlet holes and one air outlet hole can allow the airflow to form convection, which has a certain noise reduction effect. The porous airflow disturbance ball is used to further weaken the airflow velocity, and finally the airflow passes through the airflow distribution pipes with different inner diameters. Ejection, once again uses the sudden change of the cross-sectional area to reduce noise, and further improves the noise reduction effect. Compared with the existing technology, it realizes the dynamic change of the cross-sectional area, and strengthens the effect of using the sudden change of the cross-sectional area to reduce noise.

The invention discloses a cover type multi-point sprinkle head which can relieve the liquid medicine spraying velocity and prevent liquid medicine from splashing to the outside. The cover type multi-point sprinkle head is characterized in that one end of the sprinkle head is connected with an anti-splashing cover (3) which reduces the outside splashing liquid medicine, and the other end of the sprinkle head is provided with a screwed joint (1) which is connected with a spray rod of a sprayer; and the lower end of the anti-splashing cover (3) is opened, and spray ports (2) are respectively formed on the top of an inner cavity and side part which is connected with the sprinkle head and are communicated with a medicine box through the spray rod of the sprayer. The spray ports for top spraying and multi-point side spraying are formed in the sprinkle head, so that the number of liquid medicine outlets is increased, uniform spraying can be realized, the liquid medicine spraying speed of each spray port is relieved, the liquid medicine splashing is reduced, and the liquid medicine is sprayed to a smoke rod in the whole anti-splashing cover at low velocity in a short time.

The object is to provide a burner capable of taking in sufficient primary air even though the size thereof is compact, and capable of being used as an all-primary air burner. A burner includes a mixing pipe to which a fuel gas and combustion air are supplied, a burner main body having a mixing chamber at a top end on a downstream side of the mixing pipe, and a burner head which is provided at an upper part of the burner main body while communicating with the mixing chamber and has first and second burner ports for ejecting mixed gas of the fuel gas and air for combustion mixed in the mixing chamber. The burner further includes an extension pipe in the burner main body protruding inside the mixing chamber being formed by extending the mixing pipe.

The invention discloses a nucleic acid isolation machine, an injection device thereof and an injection device control method. The injection device comprises a fluid pipeline, a first piezoelectric actuator, a first pressure sensor and a control unit, wherein one end of the fluid pipeline is connected with a fluid supply pipeline, the first piezoelectric actuator is connected with the other end of the fluid pipeline, a hole for fluid to pass through is formed in the middle of the first piezoelectric actuator, and the fluid flowing into the fluid pipeline from the fluid supply pipeline flows out of the hole; the first pressure sensor is arranged on the side wall of the hole and used for detecting pressure value on the side wall of the hole when the fluid flows out of the hole; the control unit is used for sending out a control signal to control increase of the hole diameter by adjusting the voltage value of the first piezoelectric actuator when the value, detected by the first pressure sensor, of pressure on the side wall of the hole by the fluid is larger than a first preset threshold value. The technical problem that in the prior art, an injection device of the nucleic acid isolation machine sprays the solution at high speed to cause solution spill and then affect the nucleic acid extraction process is solved, and solution spatter is avoided.

The invention relates to a nacelle (12) for an aircraft high-bypass jet engine, in which a jet engine having a longitudinal axis (X) is mounted, the nacelle including a wall (24) concentrically and atThe invention relates to a nacelle (12) for an aircraft high-bypass jet engine, in which a jet engine having a longitudinal axis (X) is mounted, the nacelle including a wall (24) concentrically and atleast partially surrounding the jet engine and defining with the latter an annular duct (26) for the fluid inner flow, comprising at the downstream end (26a) of said nacelle wall a passage section of least partially surrounding the jet engine and defining with the latter an annular duct (26) for the fluid inner flow, comprising at the downstream end (26a) of said nacelle wall a passage section of the flow outlet, characterised in that the nacelle includes displacement means (42) for displacing on request a portion (24b) of the nacelle wall in order to modify the passage section of the flow outhe flow outlet, characterised in that the nacelle includes displacement means (42) for displacing on request a portion (24b) of the nacelle wall in order to modify the passage section of the flow outlet through which a major portion of the flow (Fi') escapes, said displacement forming in the nacelle wall at least one opening (28; 53) through which a small portion of the flow, called the leak flotlet through which a major portion of the flow (Fi') escapes, said displacement forming in the nacelle wall at least one opening (28; 53) through which a small portion of the flow, called the leak flow (Fi '), naturally escapes, the nacelle further comprising a fluid device (30; ; 54) that uses a fluid for compelling the leak flow to flow along the outer face (24e) of the portion of the nacelle waw (Fi '), naturally escapes, the nacelle further comprising a fluid device (30; ; 54) that uses a fluid for compelling the leak flow to flow along the outer face (24e) of the portion of the nacelle wall located downstream relative to said at least one opening.ll located downstream relative to said at least one opening.