Abstract: This fuel includes: a first switching element disposed between a booster circuit boosting a battery power and one end of a solenoid; a second switching element disposed between a battery and one end of the solenoid; a third switching element disposed between the other end of the solenoid and a ground; a fourth switching element disposed between one end of the solenoid and a ground; and a control unit configured to control open/closed states of the first switching element, the second switching element, the third switching element, and the fourth switching element. The control unit is configured to open the fourth switching element during a valve closing detection period of detecting closing of a fuel injection valve and to detect the closing of the fuel injection valve on the basis of a change in voltage of the other end of the solenoid.

Abstract: The present invention aims for smoothly aligning an injector and an injector holder in a circumferential direction when the injector is assembled to the injector holder. In an injector holder 1 having an injector cup 2 for inserting an injector 8 into the injector cup 2 and an annular flange 3 projecting outward from an opening edge of the injector cup 2, an engaging recess piece 4 is extended from the annular flange 3, the engaging recess piece 4 having a recess 6 capable of being engaged with an engaging protrusion 16 protruded from the injector 8 for positioning the injector 8, and a claw portion 7 extending in a direction of assembling the injector 8 is projected from the tip of the engaging recess piece 4.

Abstract: An ignition system includes a primary coil, a secondary coil, a first switch, a second switch, a third switch, a diode, and a switch control section. In the primary coil, a power supply is connected to a contact point between a first winding and a second winding. The secondary coil is magnetically coupled to the primary coil. The first switch is connected in series with the first winding. The second switch is connected in series with the second winding on the opposite side from the contact point. The third switch is connected in series with the second switch. The diode includes an anode connected between the second switch and the third switch and a cathode connected to the contact point. The switch control section controls opening and closing of each switch.

Abstract: Refrigeration cycle ejector power generator makes use of refrigerant in a refrigeration cycle to feed an ejector or injector within the refrigeration cycle causing the ejector to fire refrigerant at extremely high pressures and velocities into a turbine fan or blade that is sealed inside the refrigeration system and is connected to a generator in order to generate electricity. Refrigeration cycle ejector power generator comprises: a condenser, an expansion valve, an evaporator, a compressor, an ejector valve, a first ejector, a turbine, and a controller or computer. Refrigeration cycle ejector power generator is a refrigeration cycle with at least one ejector positioned in the refrigeration cycle that emits refrigerant at a high pressure and high velocity that is directed at a turbine, causing it to rotate, where this rotational energy may be used to turn a generator, thereby generating electricity.

Abstract: A facility for generating electricity that includes a water source, at least one water inlet valve for delivering water to a pressure vessel under pressure, a plurality of pressure vessel water outlet valves in flow communication with the pressure vessel and a turbine-powered electrical generator for delivery of water under pressure from the pressure vessel water outlet valves according to a predetermined sequence, and an electrical distribution system for selectively delivering electricity generated by the electrical generator to an external source for use or to an air compressor operatively connected to the water source for pressurizing the water being delivered to the pressure vessel.

Abstract: Disclosed is a system for deploying, stationing, and translocating buoyant wind- and wave-energy converters and/or other buoyant structures or devices, as well as farms of same. Also disclosed is a novel apparatus and/or machine comprising a farm of buoyant wave energy converters deployed by said method and/or configured to be deployed by said method.

Abstract: Irregular motion of waves creates a challenge to obtain energy efficiently. Heave type devices have been found to have high efficiencies, but they are limited to capturing energy along one or two directions of freedom. A new system and method for obtaining energy from the heaving motion of the waves is presented. It consists of base and heave structures connected through arm devices comprising three degrees of freedom, said arms powered by the motion of the heave structure in the fluid. These arm devices allow capture of wave energy by mechanical, hydraulic, or pneumatic systems.

Abstract: A hydroelectric power plant for a water stream includes an electromechanical converter and a turbine driving the converter. The turbine includes two vertical supports parallel to the flow and, between the supports, driving blades moved by the hydrodynamic lift forces, connected at each end to a drive component. The turbine further includes wheels driven by the drive component and assembled on the supports. The hydroelectric power plant includes at least first, second, and third travel areas where each drive component extends rectilinearly, the leading edges of the blades being arranged horizontally plus or minus 5° at least in the first and second travel areas. Each support includes guides and each blade includes elements abutting against the guides.

Abstract: A gravity and buoyancy engine producing energy via a cyclical process of harnessed gravity and buoyancy has a gravity chamber, at least one air lock chamber, at least one electricity producing system, at least one buoyant object, and at least one vertical motion transfer assembly. The gravity chamber provides a zone for the buoyant object to engage the vertical motion transfer assembly as the buoyant object descends toward the air lock chamber. The vertical motion transfer assembly further transfers kinetic energy from the vertical motion of the buoyant object to the electricity generating system in order to provide useable electrical energy. The airlock chamber subsequently reintroduces the buoyant object into the buoyancy chamber to return said buoyant object to an elevated position and recycle through the gravity chamber.

Abstract: Disclosed herein is a windmill for harvesting energy from wind. Accordingly, the windmill may include a rotor assembly and a panel. Further, the rotor assembly may include a rotor shaft and a plurality of blades disposed on the rotor shaft. Further, the rotor shaft may be rotatable. Further, the panel may be disposed proximal to the rotor assembly. Further, a curvature of the panel may be configured to accelerate flow of a wind. Further, a surface of the panel may include a wind interceptor portion and a wind accelerator portion. Further, a first flow of the wind over the wind interceptor portion may be lesser than a second flow of the wind over the wind accelerator portion. Further, the rotor assembly may be associated with the wind accelerator portion. Further, a blade of the plurality of blades intercepts the second flow of the wind.

Abstract: A fluid and wind turbine system suitable for horizontal or vertical axis applications comprising (i) blades radially spaced around a rotational axis attached to a shaft by mounting formations so that the length axis of the mounting formations are substantially parallel to the width axis of the blades which mounting formations suspend the blades from the rotational axis creating a passageway allowing the air flow to pass through the turbine and impart a unidirectional rotational force to the shaft at all times the blades are exposed to the air flow on both the windward and leeward sides of the rotational axis (ii) an air flow director which shields the rotating blades from the air flow for a portion of their 360-degree rotation.

Abstract: A method for controlling voltage of a DC link of a power converter of an electrical power system connected to a power grid includes operating the DC link to an optimum voltage set point that achieves steady state operation of the power converter. The method also includes monitoring the power grid for one or more transient events that may be an indicator of one or more sub-synchronous control interaction (SSCI) conditions occurring in the electrical power system. Upon detection of the transient event(s) occurring in the power grid, the method also includes immediately increasing the optimum voltage set point to a higher voltage set point of the DC link. Moreover, the method includes operating the DC link at the higher voltage set point until the sub-synchronous control interaction(s) is damped, thereby optimizing voltage control of the DC link.

Abstract: An adaptive dynamic planning control method and system for a large-scale energy storage station. The method comprises: setting a structure and control target parameters of an adaptive dynamic planning control system; initializing the parameters and importing an initial state of a controlled object; calculating an original wind electricity power fluctuation rate at a current moment t and smoothing the original wind electricity power according to a change rate control strategy; calculating a smoothed wind storage power fluctuation rate, a power of an energy storage system, and a state of charge (SOC) of the energy storage system; initializing and training an evaluation module and an execution module; calculating and saving a control strategy, a smoothed wind storage power fluctuation rate, an energy storage power and a (SOC) at each moment; and outputting the control strategy at each moment, the smoothed wind storage power fluctuation rate, the energy storage power and the (SOC).

Abstract: A method for providing data sets for the units, in particular wind turbines, of a wind park. The wind park is divided into at least two groups, wherein at least one group, a plurality of groups or all groups in each case have at least two units. An individual data set is first generated in each case for each of the groups. A data packet which comprises at least the generated individual data sets is then generated and the data packet is then transmitted to all units of the wind park. A wind park controller, a method for receiving a data set, a unit and a wind park is also provided.

Abstract: An orthogonal turbine having a first blade, a second blade, a first traverse connected to the first blade, a second traverse connected to the second blade, a first speed adjusting member having a first void, a first rear stop, and a first front stop, a second speed adjusting member, a disc having a first pin connected to the disc, and a shaft connected to the disc, where the shaft is configured to rotationally engage the first speed adjusting member and the shaft is configured to rotationally engage the second speed adjusting member, where the first speed adjusting member is connected to the first traverse, where the second speed adjusting member is connected to the second traverse, where the first speed adjusting member is rotationally engaged to the second speed adjusting member, and where the first void is configured to receive the first pin.

Abstract: A harnessing module for harnessing renewable wind and water energy comprises opposing concentric wings for rotation about a shaft having a hub comprising at least one pair of opposing concentric wings for use in generating renewable electrical energy. Each concentric wing of the opposing concentric wings may have a circular leading edge for facing one of air and water flow, each concentric wing having a generally curved upper surface but for a curved downward surface and a sharp trailing edge opposite the circular leading edge of each concentric wing. The circular side and curved upper surface are preferably at a positive angle of attack where one of water or wind flow is received at the circular side and provides lifting rotation of the opposing concentric wings. Hence, the opposing concentric wings rotate about the turbine shaft and comprise a harnessing module for generating electricity from either the wind or water flow.

Abstract: The present invention discloses a coating monitoring system of wind turbines, comprising a monitoring object having at least one coating on the surface. A coating monitoring module is coupled to the monitoring object, and the coating monitoring module comprises a MEMS system including a signal generating device, and a printed circuit board connected to the MEMS system. The coating monitoring module measures a measured coating impedance value of the monitoring object. A potentiostat, calculating an actual coating impedance value of the monitoring object, is connected to the monitoring object. And a computing device coupled to the coating monitoring module, the computing device correcting the measured coating impedance value based on the actual coating impedance value.

Abstract: The invention relates to a device for monitoring mechanical connection points in an installation, in particular in a wind turbine, having: at least one optical imaging device, which is designed to digitally capture optical images of one or more connection points repeatedly, in particular regularly or continuously; and a comparison device for comparing images with reference images or for comparing parameters of the images with reference parameters and for generating an error signal relating to the connection point reproduced in an image as soon as the deviations of the image from a reference image or of a parameter from a reference parameter exceed a specified threshold during imaging. Monitoring of mechanical connection points can thus be automated and systematised, and maintenance costs can be reduced. Operation of the monitored installation is also made safer.

Abstract: A lighting element for illuminating a component of a wind power installation, in particular a rotor blade and/or a rotor and/or a tower and/or a nacelle. A component for a wind power installation, in particular a rotor blade and/or a rotor and/or a nacelle and/or a tower for a wind power installation. A wind power installation and a method for illuminating a component of a wind power installation. The lighting element comprises a lighting portion and a connection portion, wherein the connection portion is embodied and arranged to be connected in an interior of the component and the lighting portion is arranged and embodied to protrude from an opening of the component and the lighting portion is arranged and embodied to irradiate the component from which it protrudes.

Abstract: A nacelle includes in turn a nacelle frame, and a yaw bearing having likewise/in turn at least a geared ring for providing a rotatable connection between the nacelle and the tower around a yaw axis. A method includes the steps of: a) disengaging the rotatable connection between the nacelle and the tower; b) lifting the nacelle from the tower by using lifting means, allowing the rotation of the geared ring; and c) rotating the geared ring around the yaw axis until the geared ring reaches a predetermined position with respect to the component to which the geared ring is connectable, either to the nacelle or the tower.

Abstract: A nacelle for a wind turbine includes a housing defining an outer wall and a heat transfer assembly embedded at least partially within the outer wall of the housing. The heat transfer assembly includes a heat transfer apparatus having a body with a flow path formed in an outer surface thereof and a working fluid configured to flow through the flow path. The heat transfer apparatus also includes a plate member arranged adjacent to the flow path of the body. As such, the plate member and the outer wall of the housing of the nacelle are configured to conduct heat from the working fluid to ambient air.

Abstract: A coil spring unit includes a coil spring; and a metal plate supporting the coil spring, the metal plate including a plurality of supporting portions cooperative with each other to support the coil spring, wherein the supporting portions are provided by bending the metal plate at bending lines and have supporting surfaces substantially perpendicular to the bending lines, respectively, and wherein the supporting surfaces are substantially parallel with outside tangential lines of the coil spring and support the coil spring.

Abstract: Actuators (artificial muscles) comprising twist-spun nanofiber yarn or twist-inserted polymer fibers generate torsional actuation when powered electrically, photonically, chemically, thermally, by absorption, or by other means. These artificial muscles utilize coiled yarns/polymer fibers and can be either neat or comprising a guest. In some embodiments, the actuator system includes a twisted and coiled polymer fiber actuator, and at least one of (i) wire connections that enable electrical heating of the twisted and coiled polymer fiber actuator, (ii) a radiation source and radiation pathway that enables photothermal heating of the twisted and coiled polymer fiber actuator, and (iii) a delivery system for delivering chemicals whose reaction produces heating of the twisted and coiled polymer fiber actuator.

Abstract: The present invention concerns an electric actuator (A, A?), comprising a rotor member (6) and an actuating assembly (4) configured to interfere with said rotor member (6), causing it to rotate, characterized in that said rotor member (6) comprises a pair of eccentric reliefs (63) arranged so as to interfere with said actuating assembly (4), and in that said actuating assembly (4) comprises a shape memory wire (2), wherein said actuating assembly (4) is configured to cause the rotation of said rotor member (6) when electric current flows through at least a portion of said shape memory wire (2).

Abstract: A piston pump, in particular a high-pressure fuel pump for an internal combustion engine, includes a pump housing, a pump piston, and a delivery chamber that is delimited at least by the pump housing and the pump piston. The piston pump further includes a seal configured to seal the delivery chamber and a separate guide element configured to guide the pump piston. The seal and the guide element are arranged between the pump piston and the pump housing. The seal is formed as a plastic ring with a substantially sleeve-shaped base portion.

Abstract: A signal processor is provided comprising one or more signal processor modules configured to: compare signaling containing information about historical data related to the performance of a pump; and provide corresponding signaling containing information about predicted maintenance needs of the pump on a real time basis based at least partly on the signaling compared containing information about the historical data related to the performance of the pump. The one or more signal processor modules may be configured to compare over time the hydraulic power generated by the pump and electric power consumed by a motor driving the pump, including tracking a ratio of hydraulic to electric power.

Abstract: Most multistage compressors specify a maximum inlet pressure that may be supplied to the compressor to stay within designed limits. If the supply gas to be compressed is at a higher pressure than the specified maximum inlet pressure, then its pressure must be reduced before connecting it to the compressor. This pressure reduction is inefficient. The present invention avoids reducing the inlet pressure by routing the supply gas directly to the appropriate compression stage depending on its inlet pressure such that the compressor loads are still within the specified limits of the equipment.

Abstract: A pump cassette is disclosed. The pump cassette includes a housing having at least one fluid inlet line and at least one fluid outlet line. The cassette also includes at least one reciprocating pressure displacement membrane pump within the housing. The pressure pump pumps a fluid from the fluid inlet line to the fluid outlet line. A hollow spike is also included on the housing as well as at least one metering pump. The metering pump is fluidly connected to the hollow spike on the housing and to a metering pump fluid line. The metering pump fluid line is fluidly connected to the fluid outlet line.

Abstract: A fluid pumping device includes a barrel body and a piston mechanism. The barrel body has a cavity. The piston mechanism includes a piston member, a first annular plug, and a second annular plug. The piston member movably extends into the cavity. The piston member has two annular grooves where the first and the second annular plugs are disposed respectively. Each of the first the second annular plugs has an annular base section and an annular protrusion section. The annular protrusion section has a first outer annular abutting face. The annular base section has an outer annular base face. The first outer annular abutting face abuts against the inner wall of the cavity.

Abstract: A pumping finger subassembly for a peristaltic infusion pump has a housing, a pinch member, a block member, and at least one biasing spring. The housing includes a transverse slot, a first side wall, and an open second side through which the pinch member and biasing spring(s) are inserted into the transverse slot. The block member includes a foot portion and a side wall portion. The foot portion is insertable into the housing through the open second side such that the block member is constrained against movement relative to the housing and the side wall portion of the block member opposes the first side wall of the housing, whereby the pinch member is supported on both lateral sides to prevent tilting of the pinch member.

Abstract: An electro-magnet pump jack including a base, a plurality of electro-magnetic coils, a cylinder, and a pump tube. The plurality of electro-magnetic coils is circular and stacked on top of one another. The coils are attached to a power source. The coils are configured to be turned on gradually moving up and down the stack creating a magnetic charge. The cylinder acts like a piston where the electro-magnets force the cylinder up and down. The cylinder has a guide tube that is secured through the middle of the pump jack. The cylinder is attached to a pump tube. The pump tube runs into the ground and controls the pump in the oil field.

Abstract: A method can include operating a pump system; determining a condition associated with the pump system; and controlling the pump system based at least in part on the condition.

Abstract: An electric torque and pressure control for load sensing pumps includes a variable open circuit pump with a swash plate angle sensor. The pump is connected in line with a pressure compensated load sensing control having an electrically variable pressure relief valve and orifice. Connected to the circuit is an engine speed sensor, a user input device, and a micro-controller. The micro-controller has software that controls a pressure relief setting of the electrically variable pressure relief valve in the pressure sensing control based upon signals from the swash plate sensor and the engine speed sensor and inputs from the user input device.

Abstract: A hydrostatic system that provides different volumetric efficiency at different states and includes a pump with a discharge and supply line. Connected between the discharge and supply line is a valve. The valve is adapted to move to a position having a cross port orifice when the pump is in a neutral state and a position where the ports are blocked when the pump is in an operation state.

Abstract: Provided is A displacement control valve which includes a valve housing, a valve element constituting a main valve that contacts and separates from a main valve seat, for opening and closing communication between discharge ports and control ports by driving force of a solenoid, a pressure-sensitive valve that opens and closes according to ambient pressure, and a pressure-sensitive valve member constituting the pressure-sensitive valve together with a pressure-sensitive element. The valve element and the pressure-sensitive valve member are formed with an intermediate communicating passage which allows communication between the control ports and the suction ports by opening and closing of the pressure-sensitive valve.

Abstract: A method, system, and apparatus for testing mobile pumps and mobile fire pumps. Exemplary embodiments described herein can reduce or eliminate the discharge of water used for testing pumps to the ground or other ambient environments. Further, exemplary embodiments can reduce or eliminate the potential for contamination of water bodies and reduce or eliminate need for large transportable reservoirs as a source of water. Exemplary embodiments can include attachment of hose valves to pump outlets for controlling a flow rate of water as well as water pressure. A hose may further be coupled to each hose valve and looped to a pump inlet, allowing for the recycling of water. Flow meters may further be provided on the looped lines to measure water flow. A low flow capacity water source and discharge may be utilized to provide further control of or adjustment to test system temperature, water flow and pressure.

Abstract: A lubricating sealing system for a fluid end includes a fluid end, a sleeve, a plunger, and a lubrication system. The sleeve is coupled to an internal surface of the fluid end. The plunger reciprocates in a linear manner through the sleeve and into a pressure chamber of the fluid end. The lubrication system is in communication with the plunger and configured to provide lubricant through an interior of the plunger for routing to surfaces between the plunger and the sleeve. The lubricant is pressurized and moved via the reciprocating of the plunger and create a positive pressure on the lubricant over the pressures experienced in the pressure chamber of the fluid end. The positive pressure creates a barrier and pushes away contaminants from the plunger seals thereby avoiding wash out.

Abstract: An oil pump includes: an inner rotor having external teeth; an outer rotor having internal teeth engaging with the external teeth; a housing that houses the inner and outer rotors; a suction port formed in the housing and guiding oil into a pump chamber; a discharge port formed in the housing and guiding the oil to outside the pump chamber; and a discharge passage through which the pump chamber and an outside area communicate with each other and that discharges a bubble in the oil inside the pump chamber to the outside area. A bubble accommodation portion having a recess shape is formed in a side surface portion of each of the external teeth on a side opposite to a rotation direction of the inner rotor.

Abstract: A gerotor or pump or gear device includes a stationary housing having a chamber with an outer ring gear and inner rotor. The outer ring gear is supported by rolling elements between the housing and outer ring gear and is rotatable about a center axis. The inner rotor is fixed to a shaft and rotatable therewith about a shaft axis that is offset or eccentric relative to the central outer ring gear axis.

Abstract: A radial vane pump or motor device includes a stationary housing provided with a cylinder supported for rotation relative to the housing about a central axis. A rotor is fixed to a shaft for rotation with the cylinder about an axis offset or eccentric relative to the central axis. A plurality of vanes slide radially in the rotor for contact with the inner surface of the cylinder.

Abstract: In a scroll compressor, a first flow passage is formed in a fixed base plate and a frame to supply oil separated by an oil separating mechanism provided in a sealed container to an oil sump at the bottom of the sealed container. In the fixed base plate, a second flow passage is formed to supply the oil separated by the oil separating mechanism into a compression mechanism.

Abstract: An electric-motor refrigerant compressor, for compressing a fluid, having a compressor housing having a housing bottom, and having a compressor part mounted in the compressor housing for conveying the fluid from a low pressure-side inlet to a high pressure-side outlet. The separating device is introduced into the housing bottom and has a cylindrical separating chamber which is connected to the outlet, and a separator which is arranged coaxially in said separating chamber for separating lubricant which is contained in the fluid, and a high pressure chamber of the compressor housing is coupled in flow terms by means of a passage duct to the separating chamber. The passage duct may be made in an intermediate wall between the high pressure chamber and the separating chamber in such a way that said passage duct opens into the separating chamber offset radially and on the outer side of the separator.

Abstract: A pumping unit is provided, including a primary vacuum pump of a multistage dry type, including at least four pumping stages fitted in series; and a two-stage Roots vacuum pump, including a first pumping stage and a second pumping stage fitted in series, the second pumping stage being fitted in series with and upstream of a first pumping stage of the primary vacuum pump in a direction of flow of gases to be pumped, in which a ratio of a volume displacement of the first pumping stage of the two-stage Roots vacuum pump to a volume displacement of the second pumping stage of the two-stage Roots vacuum pump is less than six, and in which a ratio of a volume displacement of the second pumping stage of the two-stage Roots vacuum pump to a volume displacement of the first pumping stage of the primary vacuum pump is less than six.

Abstract: A thin type pump structure includes a pump housing, a rotor assembly, a stator assembly, a flow-guiding plate, and a closing member. The pump housing has a first side defining an open-topped pump chamber having a forward projected shaft and an opposite second side defining an open-bottomed annular recess at an area opposite to and around the pump chamber. The rotor assembly has a pivot hole and is received in the pump chamber with the pivot hole turnably around the shaft. The rotor assembly includes a blade wheel and a magnetic element located behind the blade wheel. The stator assembly is received in the annular recess to horizontally face toward the magnetic element, enabling mutual electromagnetic induction and magnetic field generation between the magnetic element and the stator assembly. The flow-guiding plate covers the pump chamber, and the closing member closes the pump housing from the first side thereof.

Abstract: An electric fluid pump may include a pump housing and an electric motor arranged therein. A rotor of the electric motor may have a rotor shaft and may be mounted in a rotatable manner in a stator body, which may have a stator embedded at least regionally therein. The pump housing may be subdivided into a dry and a wet region containing the rotor. The rotor shaft may be mounted on a bottom side in the pump housing and may be connected in terms of drive to a pump impeller on a pump-impeller side, facing away from the bottom side, of the pump housing. The pump housing may have, on the pump-impeller side, an aperture out of which the rotor shaft may project. The pump housing may have an internal first bearing collar arranged around the aperture, wherein the dry region may be located radially around the first bearing collar, and wherein an outside diameter of the first bearing collar may be less than a maximum diameter of the rotor.

Abstract: A dual stage blower assembly includes a first fan configured to rotate about the rotational axis and including a first plurality blades. The first plurality of blades include a plurality of backward curved blades. The dual stage blower assembly also includes a second fan circumscribing the first fan and configured to rotate about the rotational axis. The second fan includes a second plurality of blades, wherein the second plurality of blades include one of a plurality of forward curved blades, a plurality of a radial blades, or a plurality of backward curved blades. At least one motor is coupled to the first fan and the second fan and configured to rotate the first fan and the second fan about the rotational axis.

Abstract: A pump assembly (1) includes a rotor axle (45), an impeller (12) fixed to the rotor axle (45), and a pump housing (11) accommodating the impeller (12). The pump housing (11) defines a first radial inner reference surface (71). A drive motor includes a stator (17) and a rotor (51) fixed to the rotor axle (45) for driving the impeller (12). A rotor can (57) accommodates the rotor (51) and includes a rotor can flange (63). A stator housing (13) accommodates the stator (17) and includes windings around a stator core (114). A first surface portion of the stator core (114) is overmolded with a first material (122) as an electrically insulating layer between the windings and the stator core (114). A second surface portion of the stator core (114) is overmolded with a second material (124) forming walls of the stator housing (13).

Abstract: The present disclosure relates to a device for blowing air flow. The present disclosure aims for providing a device having an attachment part and an air blowing part so that the device is attachable to the fabric products other than the string. The device provided for solving the above described problem has: an attachment part (622) that is attachable to a fabric product selected from a group consisting of a cloth (620), a shirt (620), a towel (700), a neckerchief (740), a scarf (740), a hood (720), a bandana (720), a fabric product (740) capable of retaining water, and a fabric product (740) storing a water absorptive polymer; and an air blowing part (301) that is supported by the attachment part (622), wherein the air blowing part (301) blows an air flow in a state that the attachment part (622) is supported by the fabric product put on a human body (609).

Abstract: A flow generator according to an embodiment of the present invention includes: a fan configured to generate a first air flow and a second air flow, which flow to close to each other in a vertical direction; a fan housing configured to accommodate the fan; a cover disposed to surround the fan and the fan housing; and a catch device configured to guide selective coupling between the cover and the fan housing, wherein the catch device perform a first operation to restrict or release the cover and the fan housing in a circumferential direction and perform a second operation to restrict or release the cover and the fan housing in the vertical direction.

Abstract: An air shutter comprises a holder, two compressible elastic members, a plurality of blades, and two cover plates. The holder comprises a central hub, an outer frame and a plurality of connecting pieces, and the outer frame has two annular grooves for receiving the two compressible elastic members. Each of the plurality of blades locates between two adjacent connecting pieces and one end is pivotally connected to the central hub and the other end is pivotally connected to the two compressible elastic members. In a windless state, a gap between two adjacent connecting pieces is closed by one of the blades, and when the windless state changes to a windy state, each blade is rotated by a wind force and area of the gap expands with the increase of the wind force. A radiating fan comprising the air shutter is also provided.