This fuel supply apparatus includes a fuel injection unit for injecting a gaseous fuel to be supplied to a fuel cell, and an injection control unit for controlling the fuel injection unit, wherein the fuel injection unit is provided with a first fuel injection valve capable of injecting the gaseous fuel by maintaining an opening degree of an injection port for the gaseous fuel at a prescribed opening degree between a fully closed opening degree and fully open opening degree, and a second fuel injection valve for intermittently injecting the gaseous fuel, and wherein the injection control unit controls actuation of the first fuel injection valve and actuation of the second fuel injection valve in coordination.

A refrigerant that has flowed out of a liquid ejector radiates heat in a radiator, and a liquid-phase refrigerant that has radiated heat in the radiator flows into an ejection refrigerant passage of the liquid ejector. A discharged refrigerant of a compressor that suctions the refrigerant that has flowed out of a low-pressure evaporator flows into an inflow refrigerant passage of the liquid ejector. An ejector adopted as the liquid ejector is one in which an ejection refrigerant is ejected from the ejection refrigerant passage to a gas-liquid mixing portion, and the ejection refrigerant is ejected on an outer circumferential side of the inflow refrigerant flowing from the inflow refrigerant passage into the gas-liquid mixing portion.

An ejector and a refrigeration system. The ejector includes: a high-pressure fluid passage extending from a high-pressure fluid inlet to a mixing chamber; a suction fluid passage extending from a suction fluid inlet to the mixing chamber, a first valve being disposed in the suction fluid passage; the mixing chamber, which includes a mixed fluid outlet; and a thermal bulb arranged in the suction fluid passage downstream of the first valve; wherein an elastic diaphragm is disposed in the suction fluid passage, the suction fluid passage is on a first side of the elastic diaphragm, and a closed cavity is on a second side of the elastic diaphragm; the thermal bulb is in communication with the closed cavity, and the thermal bulb and the closed cavity are filled with fluid.

The invention relates to a conveyor unit (1) for a fuel cell system (31) for conveying and/or controlling a gaseous medium, in particular hydrogen, comprising a jet pump (4), which is driven by a propulsion jet of a pressurized gaseous medium, and a metering valve (6), an outlet of the conveyor unit (1) being fluidically connected to an anode inlet (15) of a fuel cell (29). The jet pump (4) has a suction region (7), a mixing tube (18), and a diffuser (20), wherein the diffuser (20) is at least indirectly fluidically connected to the anode inlet (15) of the fuel cell (29), and the gaseous medium flows through the jet pump (4) at least partly in the direction of a first flow direction (V) which runs parallel to a first longitudinal axis (39) of the mixing tube (18). According to the invention, a second longitudinal axis (40) of the diffuser (20) is curved or inclined relative to the first longitudinal axis (39) of the mixing tube (18).

The device for pumping products from a pumping area (2) to an enclosure (3) comprises two tanks, a transfer system (8) which generates a suction of the products from the pumping area (2) to the tanks (4A, 4B) and a transfer of the non-gaseous products from the tanks (4A, 4B) to the enclosure (3), valves (3A, 3B, 3D, 3D, 3I, 4C, 4D, 4I, 4J) to, alternately, allow or block the communication from one tank (4A, 4B) to the pumping area (2) and a communication from the other tank (4A, 4B) to the enclosure (3), and a control system (25). The transfer system (8) comprises a suction unit (13) provided with hydro-ejectors (13A, 13B) connected to each tank (4A, 4B) and generating the suction of the products and a transfer unit (20) provided with a pump connected to the tanks (4A, 4B) to transfer non-gaseous products to the enclosure (3).

The invention relates to a Coanda effect flow booster (10) for inducing a boosted flow of gas, comprising: —a main air circulation pipeline (14), —at least one injection opening that opens into the main pipeline (14), —a plurality of openings for supplying compressed motive gas, each opening configured to be connected to a source of compressed motive gas in order to supply the at least one injection opening with compressed motive gas, —at least one distribution pipeline connecting the plurality of supply openings to the at least one injection opening, —a booster profile (48) at least partially defining the at least one injection opening and forming a convex surface configured to create a Coanda effect in a flow of compressed motive gas injected through the at least one injection opening.

The invention relates to a Coanda effect flow booster (10) for inducing a boosted flow of gas, comprising: —a main air circulation pipeline (14), —at least one injection opening that opens into the main pipeline (14), —a plurality of openings for supplying compressed motive gas, each opening configured to be connected to a source of compressed motive gas in order to supply the at least one injection opening with compressed motive gas, —at least one distribution pipeline connecting the plurality of supply openings to the at least one injection opening, —a booster profile (48) at least partially defining the at least one injection opening and forming a convex surface configured to create a Coanda effect in a flow of compressed motive gas injected through the at least one injection opening.

A device for generating negative pressure by a pressurized fluid, which device comprises an inflow channel and an outflow channel and, for a pressurized fluid, an injection channel, the outlet of which is arranged at a distance from the inlet of the inflow channel. In the device, the inflow channel, the injection channel and the outflow channel are arranged along a common longitudinal center axis. The injection channel is arranged between the inflow channel and the outflow channel. By arranging the inflow channel, the injection channel and the outflow channel along a common longitudinal center axis, a favorable flow pattern is obtained, which preferably allows for efficient generation of a negative pressure at the inlet of the inflow channel by means of the pressurized fluid.

An ejector having a nozzle for jetting a hydrogen gas (working fluid), wherein the nozzle includes an inner nozzle and an outer nozzle, both the nozzles are disposed to encompass an axis of a diffuser, an axis of the inner nozzle or an axis of the outer nozzle is arranged to align with the axis, an inner jet hole through which the hydrogen gas flows is formed in the inner nozzle, an outer jet hole having a ring-shaped cross section through which the hydrogen gas flows is provided between the inner nozzle and the outer nozzle, the outer jet hole when a main body casing is horizontally disposed includes an upper hole portion above the axis and a lower hole portion under the axis, and the inner nozzle and the outer nozzle are mutually eccentrically disposed so that the lower hole portion is narrower than the upper hole portion.

The invention relates to a dilute phase powder pump (51) for pumping powder, particularly coating powder, from a powder reservoir to a powder spray-coating device, comprising a powder inlet (80), which is or can be flow-connected to the powder reservoir, and a powder outlet (81), which is or can be flow-connected to the powder spray-coating device, the dilute phase powder pump (51) having also a powder pumping injector (100) with a motive fluid nozzle (1) and a converging inlet nozzle (11), and the dilute phase powder pump (51) having a valve device for optionally interrupting a flow connection between the powder inlet (80) of the dilute phase powder pump (51) and a powder inlet (5) of the motive fluid nozzle (1).