摘要:
A flow control valve comprising a main valve for opening and closing a fluid conduit, an electromagnetic coil for driving the main valve, a diaphragm responsive to the action of the main valve, a sub-valve chamber partitioned by the main valve and the diaphragm, a sub-valve incorporated in the main valve for opening and closing the sub-valve chamber to a conduit in the secondary side, a projection, protrusively formed on a driving shaft of the electromagnetic coil, responsive to a driving force of the electromagnetic coil for sliding the sub-valve by a predetermined stroke to bring the same in a fully opened state with the main valve remaining in a closed state and thereafter opening the main valve, a bleed orifice provided through a side wall of the main valve for making the pressure in the sub-valve chamber equal to a primary pressure; and a returning spring for urging each of the main valve and the sub-valve in the closing direction.
摘要:
A control apparatus for an AC motor controls an inverter in a pulse width modulation scheme to feed a coil current to a stator coil of a stator. A pattern switching mechanism switches a control pattern to a first pattern or to a second pattern; a first pattern calculating mechanism calculates a control signal using a first pattern parameter; a second pattern calculating mechanism calculates a control signal using a second pattern parameter; an offset calculating mechanism calculates a difference between a control signal of an old pattern and a control signal of a new pattern, and reflects the offset amount on the control signals; and a control output mechanism calculates a final control output signal on the basis of the control signals, and transmits the final control output signal to the inverter.
摘要:
To provide a flowmeter producing stable measurement results and coincidentally achieving miniaturization, a bent portion is provided in a flow path located between an inlet port of fluids to the flowmeter and a second flow path at which a sensor detecting a flow rate is positioned, thus forming at a sensor an almost uniform flow-velocity distribution in cross-section of the fluids and a reproducible and constant flow-velocity distribution.
摘要:
An air suction passage (4A, 4B) is provided with a pick and place confirming sensor (1) comprising a gas flow sensor. The pick and place confirming sensor (1) measures the flow rate of air sucked in from an air suction port (33) of a pick and place nozzle (2). The presence or absence of a part lifted to the pick and place nozzle (2) is detected on the basis of the measurement result.
摘要:
A path detector constructed so that a path block body (10) forming a given path (11) and having a flow sensor (13) interposed in the path (11) and a circuit board (4) surmounted by an electric circuit are accommodated in a rectangular parallelepiped or cubic housing (1). There are provided an indicator (6) and an operation switch (7) in the front surface portion of the housing (1) that is exposed to the front surface of a given panel when fixed to the panel. A U-shaped path is so formed as to have an inlet (2) and an outlet (3) in the back surface portion of the housing (1). A terminal for external connection (5) of the circuit board (4) is disposed in the back surface portion of the housing (1).
摘要:
To provide a highly accurate flow meter. A Flow meter comprising an inflow opening into which a measurement fluid flows, an outflow opening from which a measurement fluid flows, and a flow path connecting the inflow opening and the outflow opening, wherein the flow path is bent at a first bend portion, wherein: a first porous plate is disposed in the first bend portion of the flow path at an angle relative to the direction in which the flow path extends before and after the first bend portion, and a flow sensor for detecting the flow speed or flow volume of a measurement fluid that flows in the flow path, disposed on the inner wall of the flow path on the outflow opening side of the first bend portion.
摘要:
To provide a highly accurate flow meter. A Flow meter comprising an inflow opening into which a measurement fluid flows, an outflow opening from which a measurement fluid flows, and a flow path connecting the inflow opening and the outflow opening, wherein the flow path is bent at a first bend portion, wherein: a first porous plate is disposed in the first bend portion of the flow path at an angle relative to the direction in which the flow path extends before and after the first bend portion, and a flow sensor for detecting the flow speed or flow volume of a measurement fluid that flows in the flow path, disposed on the inner wall of the flow path on the outflow opening side of the first bend portion.
摘要:
To provide a fluid flow rectifying device wherein the fluid flow rectifying device can be secured easily in the inlet of a flow path and wherein the flow path structure can be simplified and the fastening operation can be made more efficient. A fluid flow rectifying device for rectifying the flow of a fluid that flows in a flow path, and which can be built in to a flow path of a fluid, comprises a fluid flow rectifying device main unit that is structured from stacking a plurality of cylindrical spacer blocks and a plurality of mesh-shaped flow rectifying members, having external shapes that are essentially identical to the external shape of the spacer blocks; and a retaining ring having a retaining portion having an external shape that is essentially identical to the external shape of the fluid flow rectifying device main unit, and being bent so as to have an angle, from the vicinity of an attachment base, in the direction that is opposite of the direction of insertion of the fluid flow rectifying device main unit, and having a protrusion to the outside from the outer peripheral surface thereof, provided integrally with the end surface of the fluid flow rectifying device main unit that is on the side opposite from the direction of insertion into the flow path.
摘要:
It is intended to provide a composition against periodontal bacteria, which has a high safety without showing any side effects and exhibits an excellent effect of killing periodontal bacteria without affecting the growth of nonpathogenic indigenous microorganisms in the oral cavity, and foods, drinks and mouth washers against periodontal bacteria. A composition against periodontal bacteria is blended with a cocoa fraction contained in cacao mass, a hot water-extract of the cocoa fraction, polyphenols originating in the cocoa fraction or free fatty acids originating in the cocoa fraction as the active ingredient. Then the obtained composition against periodontal bacteria is added to foods, drinks, mouth washers or toothpaste. As well as the above-described cocoa fraction, a composition containing cacao mass and/or cocoa is instantly available for the composition against periodontal bacteria. It is preferable that the above-described free fatty acids contain at least one member selected from palmitic acid, stearic acid, oleic acid and linoleic acid.
摘要:
A control device of an electric motor which can compatible high robust stability performance and a tracking performance and a designing method thereof. A feedback correction is obtained based on a detected motor rotation speed and a feedforward correction amount is obtained based on a calculated target torque by a controller of a microcomputer. The microcomputer commands torque control to an SR motor based on the feedback correction amount and the feedforward correction amount.