Abstract: The physical quantity measurement device includes a secondary flow path disposed outside a multilayer unit and configured to connect an upstream opening to a downstream opening. The secondary flow path is disposed gravitationally below a primary flow path. Ultrasonic transceivers are disposed to project into a flow in the multilayer unit. In the thus-configured physical quantity measurement device, the entry of water droplets into an ultrasonic propagation path and the adhesion of water droplets to the ultrasonic transceivers are substantially prevented, so that, even when the fluid flowing in contains water droplets, the physical quantity measurement device can measure the flow rate of the fluid and the concentration of components contained in the fluid.

Abstract: A physical quantity measurement device is provided which is capable of measuring a component in a fluid to be measured even when the fluid contains droplets such as fine water droplets. The physical quantity measurement device includes, at an inlet opening (5) of a sub-channel (7), an inflow direction regulator (13) which includes guide pieces (12) each of which is inclined at predetermined angle ? with respect to the flow direction in a main channel (1). The angle ? of inflow direction regulator (13) is set to a value that is greater than 90 degrees in relation to the flow direction of the main channel (1).

Abstract: A fluid instrument information providing device comprises a gas usage amount integrating section for integrating the usage amount of a gas for each of the kinds of gas instruments which is determined by a gas instrument determiner section, based on a change in the flow of the gas which is measured by the flow measuring section; an instrument information generating section for generating a plurality of gas instrument information including charge information relating to the gas instrument corresponding to the integrated usage amount for each kind of the gas instrument which is integrated by the gas usage amount integrating section, based on the integrated usage amount; an information selecting section operated by a user to select gas instrument information from among the gas instrument information generated by the gas instrument information generating section; and an output section for outputting instrument information selected by the information selecting section.

Abstract: A fluid instrument information providing device comprises a gas usage amount integrating section for integrating the usage amount of a gas for each of the kinds of gas instruments which is determined by a gas instrument determiner section, based on a change in the flow of the gas which is measured by the flow measuring section; an instrument information generating section for generating a plurality of gas instrument information including charge information relating to the gas instrument corresponding to the integrated usage amount for each kind of the gas instrument which is integrated by the gas usage amount integrating section, based on the integrated usage amount; an information selecting section operated by a user to select gas instrument information from among the gas instrument information generated by the gas instrument information generating section; and an output section for outputting instrument information selected by the information selecting section.

Abstract: A flow meter device comprises a flow measuring section (2) for measuring a flow of a fluid in a fluid passage through which the fluid is supplied to a fluid instrument in use; and a measurement data processing section (3) which calculates a slope of a change in a flow difference per unit time which change occurs with time, at a time point when a sign of the flow difference per unit time is inverted, based on the flow of the fluid measured by the flow measuring section, and determines whether or not the fluid instrument in use is a particular fluid instrument based on whether or not the slope falls within a predetermined range.

Abstract: A gas flow detecting device of the present invention, comprises a gas flow obtaining unit, and a control unit, wherein the control unit is configured to determine at second period intervals, whether or not the usage gas flow of a fuel cell system can be obtained, based on the gas flow obtained by the gas flow obtaining unit, and the control unit is configured to, when the control unit determines that the usage gas flow of the fuel cell system can be obtained, calculate a total usage gas flow of the fuel cell system, based on a change amount of the gas flow obtained by the gas flow obtaining unit, and a usage gas flow of the fuel cell system which is updated just before the determination, and the control unit is configured to, when the control unit determines that the usage gas flow of the fuel cell system cannot be obtained, deem the usage gas flow of the fuel cell system which is updated just before the determination, as the usage gas flow of the fuel cell system in a period in which the usage gas flow canno

Abstract: A fuel instrument determination device comprises a first obtaining section for obtaining a slope of a change in a fuel flow rate in a first measurement period; a second obtaining section for obtaining a slope of a change in the fuel flow rate in a second measurement period which is different in length from the first measurement period; and a determiner section for determining a fuel instrument, using the slope of the change in the fuel flow rate in the first measurement period and the slope of the change in the fuel flow rate in the second measurement period.

Abstract: A gas instrument determiner section included in a flow meter device determines whether or not a gas instrument in use is a fuel cell, by comparing an actual measurement value of a gas flow measured at first measurement time intervals in a first determination operation period from when inflowing of the gas starts until a predetermined time lapses, to determination flow data, and by comparing an actual measurement value measured at second measurement time intervals longer than the first measurement time interval in a second determination operation period which ends after the first determination operation period ends, to determination flow data. This makes it possible to accurately determine the gas instrument in use even when the gas instrument in use is the fuel cell.

Abstract: A gas instrument determiner section (12) included in a flow meter device (10A) determines a kind of a gas instrument (20) in use by utilizing a flow pattern in which a range of increase/decrease in a gas flow is within a flow zone set in a fuel cell (21) as a flow pattern which is a pattern of a gas flow which changes over time when the fuel cell (21) is included in the gas instrument (20) in use. This makes it possible to accurately determine whether or not the gas instrument in use is the fuel cell while effectively suppressing unnecessary gas consumption.

Abstract: A gas leakage detection system includes a flow path, a dual mode valve disposed in the flow path, an ultrasonic measuring section including a pair of ultrasonic transducers, disposed in the flow path upstream from the dual mode valve, a flow rate calculation section for computing a flow rate based on a signal from the ultrasonic measuring section, and a control section for controlling the dual mode valve. The control section closes or opens the dual mode valve instantaneously, and the flow rate calculation section computes a flow rate when the dual mode valve is closed. Thus, gas leakage can be decided substantially without stopping a gas flow when a user is using the gas.

Abstract: A gas type identification system includes: a flow path; an ultrasonic measurement section disposed in the flow path, the ultrasonic measurement section including a pair of ultrasonic transducers; a sound velocity calculation section for calculating a sound velocity of a gas flowing through the flow path based on a signal from the ultrasonic measurement section; a sound velocity memory section for previously storing a predetermined sound velocity; and a comparison section for comparing the sound velocity calculated by the sound velocity calculation section with the predetermined sound velocity previously stored in the sound velocity memory section.

Abstract: An equipment specifying system of the present invention includes: a flow path for supplying gas to a plurality of pieces of equipment; an ultrasonic propagation signal measuring section for measuring a propagation signal based on a time during which an ultrasonic wave propagates across the flow path; a signal pattern generation section for generating a signal pattern based on a change in a propagation signal; a signal pattern storage section for previously storing a plurality of signal patterns respectively corresponding to a plurality of pieces of equipment; a signal pattern comparison section for comparing a signal pattern generated by the signal pattern generation section with a plurality of signal patterns previously stored in the signal pattern storage section; and an equipment specifying section for specifying currently used equipment among a plurality of pieces of equipment, in accordance with the comparison results obtained by the signal pattern comparison section.

Abstract: An ultrasonic flow meter includes a conduit through which a fluid flows, an ultrasonic generator, a receiver for receiving ultrasonic waves on the upstream or downstream side of the generator, a time counter for determining the propagation time of the ultrasonic wave, a flow rate calculator for calculating the flow rate from the propagation time, and a timing controller. The timing controller sets a delay time corresponding to the flow rate measured from the relation between a flow rate which is set in advance, and the measured delay time. After the passage of this delay time the ultrasonic wave is emitted from the generator on the basis of a driving signal outputted from a trigger section and the flow rate is determined. Since the flow rate is thus measured with the delay time suitable for the flow rate, the flow rate is correctly determined, and power consumption is reduced.

Abstract: A fluid flow control assembly which comprises an inlet defining structure through which a fluid medium flows in one direction, a partitioning member for dividing the fluid flow into first and second fluid streams, an outlet defining structure positioned downstream of the inlet defining structure and including a pair of outwardly diverging guide walls, first and second deflector vanes disposed in respective paths of travel of the first and second fluid streams for controlling the respective directions of flow of the first and second fluid streams, and a passage defining structure for providing a passage for guiding a third fluid stream in a direction generally at right angles to the direction of flow of any one of the first and second fluid streams. The partitioning member may be a partition wall, a cylindrical column or a cylindrical burner.

Abstract: In the outlet part of a fluid passage generally rectangular in cross section defined by two parallel opposed broad walls spaced apart a short distance therebetween and two opposed narrower walls spaced apart a longer distance therebetween, the narrower walls curve outwards forming guide walls, and a row of deflecting blades of curved profile extend between the broad walls and are held in angle-adjustable manner between said curved faces of the guide walls to effectively deflect fluid flow without loss of flow rate by the attachment effect to the curved faces.

Abstract: A fluid deflecting assembly is disclosed primarily for use in an outlet port of an air conditioning unit for controlling the direction of an air flow discharged from the outlet port. The fluid deflecting assembly comprises a tubular body having a flow passage for passing a fluid flow axially therethrough, a nozzle body mounted on the tubular body and having a nozzle disposed downstream of the flow passage in a direction of the fluid flow, a restriction surface extending downstream of the flow passage in surrounding relation to the nozzle, and a guide wall surface extending downstream of the nozzle and flaring radially outwardly from the nozzle in surrounding relation thereto, and a bias flow shield disposed in the flow passage upstream of and radially outwardly of the nozzle for adjustably blocking a portion of a bias fluid flow directed by the restriction surface toward the nozzle.

Abstract: A fluid deflecting assembly comprising a passage defining structure having a fluid passage defined therein for the passage of a fluid stream in one direction therethrough and having a fluid inlet and a fluid exit spaced apart from the fluid inlet, and at least one group of deflector blades pivotally supported within the passage defining structure adjacent the fluid exit for movement through a predetermined angle and arranged in such a curved row that, when the deflector blades are pivoted in one direction to a deflecting position, the deflecting blades altogether form a generally continuously curved guide wall extending within the passage defining structure so as to diverge away from the direction of flow of the fluid stream through the passage. The guide wall is operable to draw the fluid stream close thereto to deflect the fluid stream as a whole by the Coanda effect known per se as it emerges outwards from the fluid exit.

Abstract: A flow direction controller mounted on the outlet of an air conditioner or the like and adapted to control the blowing direction of the air. The flow direction controller is composed mainly of two flow-attaching walls and a control blade rotatable on a shaft. The control blades has two surfaces each producing a flow biasing effect and a curved surface. With this arrangement, it is possible to deflect the flow of blowing air over a wide angular range and also to realize a split-flow blowing without being accompanied by a substantial reduction in the air flow rate, by making efficient use of the attachment of the flow components to the attaching walls and the curved surface.

Abstract: An electric fan assembly comprises a generally cylindrical cross-flow fan, a rear guider, and a stabilizer. The rear guider has a downstream edge with respect to the direction of flow of an air current and is hingedly connected with a pivotable plate. By the utilization of the adherence effect of the air current to the pivotable plate, the direction of flow of the air current is controlled by pivoting the pivotable plate. In other words a slight pivotal movement of the pivotable plate is sufficient to bring about the deflection of the air current over a relatively large angle. The fan assembly may be employed in an air-conditioner in which case a relatively high air-conditioning efficiency can be obtained.

Abstract: A fluid deflecting assembly for deflecting a fluid medium in any desired direction, particularly suited for use in an air conditioner, which has a nozzle for issuing a main stream of fluid as the fluid passes therethrough, a guide wall at a position downstream of the nozzle and having substantially a diverging shape in a direction downstream with respect to the direction of flow of the main stream and opening outwardly in a direction away from the nozzle, and a control device for controlling the mode of flow of the fluid at a position upstream of the nozzle. The nozzle has a relatively small thickness in the direction of flow of the fluid therethrough and is so shaped as to constrict the flow of the fluid as the latter passes therethrough.