Hitachi, Ltd.

Shin Meiwa Industry Co., Ltd.

Akira Arai

Toshio Hatada

Takao Senshu

Takashi Hashimoto

Hiroshi Inoue

Shohei Yoshida

Michio Kuroda

Yozo Nakamura

Katsukuni Hisano

Yoji Ishibashi

Hiromi Koizumi

Kuniyoshi Tsubouchi

Katsuo Wada

Kiyoshi Namura

Takashi Ohmori

Kazumi Iwai

Fumio Kato

Naoyuki Tanaka

Atsushi Matsuzaki

Fumio Harada

Yutaka Imaizumi

Taketoshi Mochizuki

Shigeyuki Akatsu

Sumiyoshi Takeda

Hajime Futawatari

Genichiro Nishi

Yuzo Kadomukai

Tsunehiro Endo

Shigeru Machida

Junichi Yamada

Nobukatsu Arai

Hiroaki Hata

Mitsuru Nakamura

Toshihiko Fukushima

Masaaki Aoki

Shinjiro Ueda

Tsutomu Okusawa

Katsumi Matsubara

Kunio Fujie

Riichi Uchida

Tunehiro Endo

Kimio Kakizaki

Hidetomo Mori

Kazuya Matsuo

Sigeaki Kuroda

Akihiko Ishiyama

Masamichi Hanada

Kazuo Ikeda

Mituo Kudo

Haruo Mishina

Eiji Yokoyama

Mineo Takahashi

Yoshihisa Uneyama

Hajime Arai

Mitsuo Kudo

Keiji Shono

Masaichi Omori

Keizi Shono

Masaichi Ohmori

Katsuzi Nakano

Masaru Furuhashi

Kiyoshi Hikita

Tatsumi Tanaka

Takeoshi Katoh

A gas turbine combustor including a first-stage combustion chamber being arranged to serve as a premix chamber for a second-stage combustion chamber and an auxiliary burner provided in the first-stage combustion chamber and arranged to effect, when fired, combustion and holding of a flame in the first-stage combustion chamber and to effect, when extinguished, feed a flame from the first-stage combustion chamber to the second-stage combustion chamber.

Gas turbine combustor

A gas turbine combustor including a first-stage combustion chamber being arranged to serve as a premix chamber for a second-stage combustion chamber and an auxiliary burner provided in the first-stage combustion chamber and arranged to effect, when fired, combustion and holding of a flame in the first-stage combustion chamber and to effect, when extinguished, feed a flame from the first-stage combustion chamber to the second-stage combustion chamber; and a method of driving the gas turbine combustor including a step of preparing the auxiliary burner in the first stage combustion chamber, the auxiliary burner being sparked when said combustion is fired, and causing the first-stage combustion camber to serve as the premixing chamber for the second-stage combustion chamber by extinguished the auxiliary burner.

Gas turbine combustor and method of running the same

A method and an apparatus for burning gaseous fuel, the composition of the fuel varying at times, wherein; main injection ports and sub-injection ports are arranged in such positions that the fuel injected through the sub-injection ports may be ignited by a flame formed from the fuel injected through the main injection ports; fuel passes are provided or conducting the gaseous fuel separately to the two groups of injection ports; and control valve is provided for adjusting the ratio of the fuel flow to the main injection ports to the fuel flow to the sub-injection ports; whereby the proportion of the fuel to be injected through the main injection ports is increased as the rate of burning the gaseous fuel increases.

Method for burning gaseous fuel, wherein fuel composition varies

An engine load torque controller detects the engine output torque variation as an engine speed variation and controls the load torque of an auxiliary machinary driven by the engine basing on the detected speed variation, thereby diminishing the vibration of the engine.

Internal combustion engine equipped with a torque controller

A method and an apparatus for burning gaseous fuel, the composition of the fuel varying at times, wherein; main injection ports and sub-injection ports are arranged in such positions that the fuel injected through the sub-injection ports may be ignited by a flame formed from the fuel injected through the main injection ports; fuel passes are provided for conducting the gaseous fuel separately to the two groups of injection ports; and a control valve is provided for adjusting the ratio of the fuel flow to the main injection ports to the fuel flow to the sub-injection ports; whereby the proportion of the fuel to be injected through the main injection ports is increased as the rate of burning the gaseous fuel increases.

Method and apparatus for burning gaseous fuel, wherein fuel composition

An apparatus for transferring a small amount of fluid has at least one series of vibration pump units each having a fluid transfer pipe designed to perform a respirating action by the operation of a vibrator which vibrates in response to application of a high-frequency voltage. The fluid transfer pipes are connected in series via fluid diodes which serve to enable the fluid to flow only in one direction, while resisting reversing of the fluid, so that the fluid is transferred in one direction through the successive fluid transfer pipes. In order to minimize the pulsation of the fluid pressure at the downstream end of the apparatus, the vibrators of the pump unit are excited with predetermined phase differentials. Additional fluid diode is connected to the outlet end of the most downstream pump unit. The pressure differential across at least one of the fluid diodes is measured and the rate of transfer of the fluid performed by the fluid transfer apparatus is controlled in accordance with the measured pressure differential. In a specific form of the invention, a plurality of rows to of the vibration pump units are disposed in parallel, and the pressure differentials are measured across orifices provided on the downstream ends of the respective rows of the pump unit serieses deviations of the measured pressure differentials are detected. A control is preformed in accordance with the measured pressure differential deviations so as to equalize the flow rates of the fluid in all the parallel rows of vibration pump units.

Apparatus for transferring small amount of fluid

An apparatus for transferring a small amount of fluid has at least three vibration pump units which are connected in series. Each vibration pump unit has a fluid transfer pipe, a vibrator mounted on the outer peripheral surface of the fluid transfer pipe and adapted to cause the transfer pipe to vibrate in a respiring manner, an inner peripheral electrode on the inner peripheral surface of the vibrator, an outer peripheral electrode on the outer peripheral surface of the vibrator, a high-frequency voltage applying device for applying a high-frequency voltage between the inner peripheral electrode and the outer peripheral electrode thereby causing the vibrator to vibrate in respiring manner, and a fluid diode exhibiting resistance to reversing of the fluid and connected to the fluid outlet of the fluid transfer pipe in such a manner as to permit the fluid to be discharged from the fluid pipe. The adjacent vibration pumps operate with a predetermined phase difference therebetween.

A motor-driven compressor used as a compressor or high-pressure gas generator for a refrigerating cycle, in which the output torque of the electric motor for driving the compressor is controlled so as to make the output torque agree with the load torque required for performing compression in any revolutional angular position of the driving main shaft to thereby reduce revolutional torsional vibrations caused by disagreement between the load torque and the output torque.

Motor-driven compressor provided with torque control device

A heat exchanger, e.g. that used in an air-conditioner, having a plurality of spaced plate-fins with narrow distance in parallel and a plurality of heat transfer pipes passing through said fins, said fins being coated with an aqueous coating composition comprising 100 parts by weight of a resin composition for water paint in solids content, 5 to 95 parts by weight of a surface active agent and 5 to 65 parts by weight of synthetic silica and baked at a temperature of 120.degree. C. to 200.degree. C. for 10 to 40 minutes to give a coating film of 3 to 20 .mu.m, has excellent hardness and corrosion resistance without damaging hydrophilic properties.

Heat exchanger coated with aqueous coating composition

A refrigerating apparatus comprises two refrigerant circuits connected in a parallel fashion which include a common condenser. An evaporating temperature in an evaporator of one refrigerant circuit is set to a relatively high temperature compared with that of an evaporator of the other refrigerant circuit, so that a two-temperature evaporation type refrigerating apparatus is formed and a compressor of one refrigerant circuit can be intermittently driven for each predetermined time period in a forced manner. In a defrosting mode, the condenser is made to operate as an evaporator, whereby the evaporator included in the other refrigerant circuit is defrosted.

Refrigerating apparatus

A refrigerating apparatus including a first compressor, a condenser, a first pressure reducer a first evaporator, a second pressure reducer and a second evaporator connected together by lines to form a refrigerating circuit for a refrigerant to flow therethrough, wherein a second compressor is connected at its suction side to the second pressure reducer for receiving gaseous component of refrigerant from the first evaporator and connected at its discharge side to the line between the first compressor and the condenser. An evaporative pressure control valve may be mounted in the line between the first evaporator and the second pressure reducer or the line between the second pressure reducer and the second evaporator. A bypass line mounting an electromagnetic valve may connect the line between the first evaporator and the second pressure reducer to the line between the second pressure reducer and the second evaporator.

A centrifugal blower including a casing formed with a discharge port and a suction port, and an impeller mounted in the casing and having a plurality of backwardly curved vanes arranged circumferentially of the impeller. The suction port has a semicircular suction member located in spaced juxtaposed relation to a semicircular curled portion formed at the forward end of a shroud of the impeller. An annular guide plate may be attached to the inner side of the suction member and formed at its open end with a wall portion disposed along the shroud which is formed at its forward end with an annular wall extending into a space defined between the suction member and the guide plate. Hair may be provided on one of opposed wall surfaces of the suction member and the annular wall of the shroud.

Blower

In a cross finned tube heat exchanger including a multiplicity of side-by-side fin plates, and a plurality of heat transfer tubes extending through the fin plates at least in one row to provide a serpentine flow passage for a heat transfer medium which exchanges heat with another heat transfer medium flowing across the surfaces of the fin plates, a multiplicity of stepped louvers are formed on the wall of each fin plate between the adjacent heat transfer tubes of the same row. The stepped louvers each extending in a direction at right angles to the direction of air flow across the surfaces of the fin plates include at least one tilting rise wall and may differ from one another in shape depending on their positions. The stepped louvers on each fin plate may be arranged in the form of waves or uniform in height with respect to the direction in which each fin plate extends. The adjacent stepped louvers have edges varying in vertical positions.

Heat exchanger

A cross-fin tube type heat exchanger having a large number of parallel fins and a plurality of heat transfer tubes extended through and fixed to the fins, so that heat may be exchanged between a first heat exchanging medium flowing through the heat transfer tubes and a second heat exchanging medium flowing along the surfaces of the fin, across the walls of the heat transfer tubes and through the fins. In the portions of each fin between adjacent heat transfer tubes of the same row, formed are a number of slits perpendicular to the direction of flow of the second heat exchanging medium. Each elongated section defined between each pair of adjacent slits is bent along its breadthwise bisector line and is raised in the form of a bridge to constitute an upwardly convexed louver element. The upwardly convexed louver element may have a cross section with an obtuse apex angle, or may have an arcuate cross section. The successive louver elements are arrayed in the direction of flow of the second heat exchanging medium in a manner of corrugation, or alternately staggered in the heightwise direction so that the edges of adjacent louver elements may be staggered in the heightwise direction. The fins having louver elements thus constructed cause a turbulency of the flow of the second heat exchanging medium to effectively prevent boundary layers of the latter from growing, thereby to ensure a higher efficiency of the heat exchange. Also increased stiffness or rigidity of the fin is obtained thanks to the provision of upwardly convexed louver elements.

Cross-fin tube type heat exchanger

An apparatus for manufacturing heat transfer tubes for use in evaporators and coolers for freezers, air conditioning units, refrigerators, and the like, with close machining tolerances. It forms cavities, with small openings communicating them with the outside, on the inside of a tube, through three steps of forming a multiplicity of alternate grooves and ribs in parallel on the inner surface of the tube, forming cuts in the concentrically directed crests of the ribs, and then forcing the crests sidewise so that the crest of each rib is bent down onto an intermediate part of the adjacent rib to form a cavity in between.

Apparatus for manufacturing heat transfer tubes

Growing community of inventors

Tsukuba, Japan

Akira Arai