摘要:
A heat exchanger comprises outer fins; a plurality of tubes arranged alternately with the outer fins; and header tanks receiving open ends of the tubes for communication with the tubes. The header tanks each comprise a first member and a second member which are combined to each other. The first member has tube insertion slots into which the open ends of the tubes are inserted, the second member does not have the tube insertion slots. The first member is either a core material having no brazing material layers on outer and inner peripheral surfaces thereof, or a core material having a brazing material layer on an outer peripheral surface thereof but having no brazing material layer on an inner peripheral surface thereof. The second member is brazed to the outer or inner peripheral surface of the first member having no brazing material layer thereon.
摘要:
A joint structure of a header tank and a connector in a heat exchanger includes a header tank (1) including a plate wall (1c) formed with a first communication hole (1a). The joint structure includes a block-shaped connector (2) having a second communication hole (2b) positioned to the first communication hole (1a) and joined to the header tank (1). The first communication hole (1a) is smaller than the second communication hole (2b). The first communication hole (1a) has therearound a periphery (1b) caulked and fixed on an inner peripheral surface of the second communication hole (2a) by burring formation.
摘要:
A heat exchanger comprises outer fins; a plurality of tubes arranged alternately with the outer fins; and header tanks receiving open ends of the tubes for communication with the tubes. The header tanks each comprise a first member and a second member which are combined to each other. The first member has tube insertion slots into which the open ends of the tubes are inserted, the second member does not have the tube insertion slots. The first member is either a core material having no brazing material layers on outer and inner peripheral surfaces thereof, or a core material having a brazing material layer on an outer peripheral surface thereof but having no brazing material layer on an inner peripheral surface thereof. The second member is brazed to the outer or inner peripheral surface of the first member having no brazing material layer thereon.
摘要:
A practically realizable semiconductor magnetic body having a flat-band structure is disclosed. The semiconductor magnetic body is formed by semiconductor quantum dots arranged on lattice points such that electrons can transfer between neighboring quantum dots and the electron energy band contains a flat-band structure, where each quantum dot is a structure in which electrons are confined inside a region which is surrounded by high energy potential regions, and the flat-band structure is a band structure in which energy dispersion of electrons has hardly any wave number dependency.
摘要:
The present invention relates to an aromatic polycarbonate resin which comprises repetitive units originating in residual groups of a 2,2-bis(4-hydroxyphenyl)adamantane compound and a 1,3-bis(4-hydroxyphenyl)adamantane compound having a substituent on an aromatic ring and which is excellent in a transparency, a heat resistance and a mechanical strength and has a good moldability and a production process for the aromatic polycarbonate resin described above in which the adamantane compounds described above are reacted with a carbonic ester-forming compound. Further, it relates to an aromatic polycarbonate resin which is excellent in an optical characteristic and an optical part prepared by molding the same.
摘要:
To provide a capacitor device that can be made lighter in weight, thin shaped, and miniaturized, which has a plurality of conductive pattern electrodes 18 and 22 electrically separated by a separation groove 19; a capacitor element 15 including an anode lead 16 fixed to the one conductive pattern electrode 18 and a cathode lead 17 fixed to the other conductive pattern electrode 22; an insulating resin 24 for covering the capacitor element 15 and a part working as the conductive pattern electrodes 18 and 22 except for a lower face of the conductive pattern electrodes 18 and 22, and for integrally supporting the conductive pattern electrode and the capacitor element.
摘要:
A color cathode ray tube having at least an electron gun and a fluorescent screen. The electron gun forms a plurality of electron beams arranged in line and includes a focusing electrode and an anode having a gap and providing a main lens for focusing and accelerating the electron beams. The focusing electrode includes at least a first division electrode and a second division electrode having the same potential and arranged with a gap in the axial direction of the tube. The second division electrode is opposed to said anode and has, in the opposed surface thereof, a single opening for passing the plurality of electron beams in common. The second division electrode is opposed to the first division electrode and has, in the opposed surface thereof, individual electron beam passing openings for the respective electron beams. The length of the second division electrode in the axial direction of the tube is shorter than the length of the first division electrode in the axial direction of the tube and the diameter of the individual electron beam passing openings in the surface of the second division electrode opposed to the first division electrode is smaller than the diameter of the single opening in the surface of the second division electrode opposed to the anode in a direction at right angles with the in-line direction. The length of the second division electrode in the axial direction of the tube is not smaller than the diameter of the single opening in a direction at right angles with the in-line direction.
摘要:
A book recycling promotion device registers in advance a book purchased information of a customer and an electronic mail address of the customer, calculates a current buying price of the book based on a current sales information on the book included in the book purchased information, and sends an electronic mail including the buying price and a message to promote selling-off of the book to the electronic mail address corresponding to the book purchased information.
摘要:
The present invention provides a polythiocarbonate resin containing a repeating unit represented by the following general formula (1), having high transparency, refractive index, and Abbe number and excellent heat resistance and impact resistance, and an optical material using the polythiocarbonate resin.Further, the present invention provides a sulfur-containing compound having an Abbe number of 40 or more, a high refractive index, a high Abbe number, excellent transparency, excellent heat resistance, and the like, obtained by reacting a dithiol compound represented by the following general formula (II) and a diene compound represented by the following general formula (III), and thus containing a repeating unit formed of a structural unit derived from a residue of the dithiol compound and a structural unit derived from a residue of the diene compound. Still further, the present invention provides a method of producing the sulfur-containing compound, a sulfur-containing polymer including the sulfur-containing compound as a constitutional component, and an optical material containing the sulfur-containing polymer. HS-G1-SH (II) G2″ (III)
摘要:
The present invention relates to an aromatic polycarbonate resin which comprises repetitive units originating in residual groups of a 2,2-bis(4-hydroxyphenyl)adamantane compound and a 1,3-bis(4-hydroxyphenyl)adamantane compound having a substituent on an aromatic ring and which is excellent in a transparency, a heat resistance and a mechanical strength and has a good moldability and a production process for the aromatic polycarbonate resin described above in which the adamantane compounds described above are reacted with a carbonic ester-forming compound. Further, it relates to an aromatic polycarbonate resin which is excellent in an optical characteristic and an optical part prepared by molding the same.