摘要:
A counter-rotating axial flow fan with improved characteristics and reduced noise compared to the related art can be provided. Defining the number of front blades as N, the number of stationary blades as M, and the number of rear blades as P, and defining the maximum axial chord length of the front blades as Lf, the maximum axial chord length of the rear blades as Lr, the outside diameter of the front blades as Rf, and the outside diameter of the rear blades as Rr, the counter-rotating axial flow fan satisfies the following two relationships: N≧P>M; and Lf/(Rf×π/N)≧1.25 and/or Lr/(Rr×π/P)≧0.83.
摘要:
A resonance system that receives power from a power source section is configured by at least a primary resonance coil, a secondary resonance coil, and a load. The output frequency fo of the power source section is set to lie within one of the frequency ranges f1≦fn≦f2, f3≦fo≦f4, . . . , f2n-1≦fo≦f2n. The frequencies f1, f2, f3, f4, . . . , f2n-1, f2n (f1
摘要:
A fan unit includes a housing having an air inlet and an air outlet; a first fan and second fan mounted in the air inlet and the air outlet respectively and arranged in tandem so as to generate an air flow; a first valve mounted adjacent to the air inlet for allowing air to flow into the housing and preventing air from flowing out of the housing; and a second valve mounted adjacent to the air outlet for allowing air to flow out of the housing and preventing air from flowing into the housing.
摘要:
A counter-rotating axial flow fan in which the shape of stationary blades of a middle stationary portion is optimized to reduce noise is provided. Defining the maximum axial chord length of front blades as Lf, the maximum axial chord length of rear blades as Lr, and the maximum axial chord length of stationary blades as Lm, a relationship of Lm/(Lf+Lr) 5.8.
摘要:
A door locking device which is reduced in size relative to a conventional device includes a key operation transmission link, which transmits a key operation force relative to a key cylinder to a relay lever corresponding to “a lock switch member”, and which is arranged to rotate about a common rotation axis shared with the relay lever. In addition, a rotation space for first and second movable contact portions fits within a circular-shaped area around the common rotation axis because a first fan-shaped protruding portion including the first movable contact portion for transmitting a force to the key operation transmission link and the relay lever and a second fan-shaped protruding portion including the second movable contact portion for transmitting the force to the key operation transmission link and the relay lever are arranged around the common rotation axis.
摘要:
In the present invention, magnetic and non-magnetic films are formed as a compound of Fe, Ni and P to provide a multilayer film in which such magnetic and non-magnetic films are alternately stacked.The multilayer film includes a magnetic film and a non-magnetic film. The magnetic film and the non-magnetic film are alternately stacked. The magnetic film contains Fe, Ni and P but has Fe as a main component. The magnetic film contains Fe, Ni and P but has Fe or Ni as a main component. The non-magnetic film contains Fe, Ni and P but has Ni as a main component.
摘要:
A semiconductor device mounted structure includes a semiconductor device having a plurality of first electrodes, a circuit board having a plurality of second electrodes, a plurality of bumps respectively formed on the plurality of first electrodes, a plurality of bonding members respectively positioned between the bumps and the second electrodes to electrically connect the first electrodes to the second electrodes via the bumps, and a plurality of reinforcing resin members respectively positioned around the bonding members so as to cover at least the bonding members and bonding regions between the bonding members and the bumps. Adjacent reinforcing resin members are spaced away from each other so as not to have contact with each other without being in contact with the semiconductor device. This semiconductor device mounted structure enhances the reliability of joints in impact resistance and makes it easy to repair it.
摘要:
A box-shaped enclosure of a storage box includes a deadening wall or walls defining a storage space between first and second planes. The storage space is open at the first and second planes. A deadening wall member extends along the first plane. An auxiliary box-shaped enclosure is connected to the box-shaped enclosure so as to close the first plane of the box-shaped enclosure. The auxiliary box-shaped enclosure defines an auxiliary space isolated from the storage space with a deadening wall member. The storage space is connected to the fresh air through the ventilation opening and the auxiliary space. The deadening wall or walls of the box-shaped enclosure and the deadening wall member serve to prevent the leakage of the operating sound.
摘要:
Disclosed is a solder material which enables to realize a lower mounting temperature when an electronic component is mounted. Also disclosed are a solder paste and a conductive adhesive. Specifically disclosed is a solder material having a basic composition composed of Sn, Bi and In. This solder material may further contain at least one metal selected from the group consisting of Cu, Ge and Ni. A solder paste which enables to realize a low-temperature mounting can be obtained by blending a flux component into the solder material. A conductive adhesive which enables to realize a low-temperature mounting can be obtained by blending a resin component into the solder material.