Abstract: A communication apparatus measures wave quality, analyzes measured data, and automatically conducts a subsequent operation. There are provided a communication apparatus, a wave quality automatic measuring system for a cellular network, a wave quality automatic measuring method, and a program in which the amount of data delivered from a measuring terminal to a server is reduced and measurement is automatically carried out on the side of the measuring terminal to thereby suppress the manual job to conduct the resetting for a subsequent measurement.

Abstract: In an oil-cooled air compressor for controlling a temperature of a lubricant by changing a flow rate of a cooling medium supplied to a heat exchanger for the lubricant, for obtaining an energy saving effect by variable control of the flow rate of the cooling medium and preventing securely a condensed water from occurring in a compressor unit even when an exhaust duct is arranged inappropriately, a lubricant flow rate adjustor is arranged to measure a temperature of the lubricant and decreasing a flow rate of the lubricant supplied to the heat exchanger so that the lubricant temperature becomes T1 to satisfy T0>T1?TD when T0 is a control temperature of the lubricant and TD is a condensed water occurrence critical temperature at which a condensed water occurs in the compressor.

Abstract: In an oil-cooled screw compressor comprising, a compressor body including a pair of a male rotor and a female rotor, a motor including a stator and a motor rotor connected to one of the male and female rotors, and an oil separator container for gathering the oil from a mixture of the gaseous manner and oil to restrain the oil from proceeding with the compressed gaseous matter after the mixture of the gaseous manner and oil is discharged from the pair of male and female rotors, a rotational axis of the motor rotor and the rotational axis of the one of the male and female rotors are coaxial with respect to each other.

Abstract: Provided is a water-cooled air compressor which is capable of restraining lowering of the performance of a plate type compressor for heat-exchanging compressed air from a compressor body, with cooling water due to clogging of gaps between plates in the heat-exchanger by dust or the like, incorporating a first solenoid valve and a second solenoid valve connected respectively in a cooling water supply pipe line and a cooling water discharge pipe line of the heat-exchanger, an air feed pipe line connecting between a compressed air supply pipe line on the outlet side of the heat-exchanger and the cooling water discharge pipe line, a third solenoid valve and a check valve connected in the air feed pipe line, a discharge pipe line connected in a discharge pipe line 18 so as to branch therefrom, a fourth solenoid valve connected in the discharge pipe line, and a control device for controlling opening and closing of the first to fourth solenoid valves.

Abstract: In an oil-cooled screw compressor comprising, a compressor body including a pair of a male rotor and a female rotor, a motor including a stator and a motor rotor connected to one of the male and female rotors, and an oil separator container for gathering the oil from a mixture of the gaseous manner and oil to restrain the oil from proceeding with the compressed gaseous matter after the mixture of the gaseous manner and oil is discharged from the pair of male and female rotors, a rotational axis of the motor rotor and the rotational axis of the one of the male and female rotors are coaxial with respect to each other.

Abstract: The multiblade impeller of the present invention comprises a main plate, a side plate having a suction port at a center thereof, and a large number of blades provided between the main plate and the side plate and extend in the radial direction in an arc form. The main plate and the side plate each have a large number of ridge portions, each extending in the radial direction in an arc form so as to coincide with the shape of the blade extending in the radial direction in an arc form. End portions of the blades are inserted in grooves formed inside the ridge portions of the main plate and the side plate and are fixed to the ridge portions by being bent.

Abstract: A screw compressor rotatably accommodates, within a casing 20 including a suction port and a delivery port 3, a pair of female and male rotors 1, 2 under the meshed state and compresses gas in the state where a liquid is mixed by pouring the liquid to the gas confined within a working chamber 8 formed with both rotors 1, 2 and the casing 20. On the wall surface of the casing 20 opposing to the rotor delivery end, a recessed part 10 is provided. The working chamber 8 is communicated with the recessed part 10 immediately before isolating from the delivery port 3 and this communication is maintained until a volume of the working chamber 8 substantially becomes zero. Thereby, the screw compressor can be control increase in power consumption, vibration, and noise.

Abstract: An oil-injection screw compressor in which oil is mixed into compressed gas, in order to prevent back flow during the no-load running and stoppage of the compressor body while contributing to a cost reduction, comprising: a compressor body; a motor for driving the compressor body; an inverter for variably controlling the number of revolutions of the motor; a blow-off valve disposed on the discharge side of the compressor body and capable of releasing a quantity of air beyond the discharge capacity of the compressor body when operating of the motor at the minimum number of revolutions; a suction non-return valve which, disposed on the suction side of the compressor body, is closed when it is at a stop; and a pressure sensor for detecting the discharge side pressure of the compressor body; and, a controller which, at the time of operation of the motor at the minimum number of revolutions, opens the blow-off valve when the discharge side pressure P detected by the pressure sensor has risen to a prescribed upper

Abstract: In an oil-cooled screw compressor comprising, a compressor body including a pair of a male rotor and a female rotor, a motor including a stator and a motor rotor connected to one of the male and female rotors, and an oil separator container for gathering the oil from a mixture of the gaseous manner and oil to restrain the oil from proceeding with the compressed gaseous matter after the mixture of the gaseous manner and oil is discharged from the pair of male and female rotors, a rotational axis of the motor rotor and the rotational axis of the one of the male and female rotors are coaxial with respect to each other.

Abstract: A container for distributing a plastic food such as soft serve ice cream and a container capable of simultaneously distributing a plurality of plastic substances include a circular bottom portion provided with an opening, a side face with a circular-arc-shaped face and a sword-guard-shaped portion protruded outwardly in a perpendicular direction to each side face. The container is constituted so that a wall thickness of the side face is smaller than that of the circular bottom portion and that the wall thickness of the sword-guard-shaped portion is larger than that of the half-moon-shaped bottom portion.

Abstract: Ice creams having a creamy texture without any soybean odor like ice cream are provided by using soybean, without any use of dairy products or chemical auxiliaries, so the ice creams can be ingested by persons who cannot enjoy previous ice creams with addition of dairy products or chemical auxiliaries, due to the delicate health or milk allergy. Novel ice creams are provided, containing as the essential main components, soymilk and at least one species of potatoes. Use of at least one species of potatoes as one of the main components makes it possible to provide an ice cream product showing a smooth and creamy texture comparable to conventional ice creams and having no soybean odor.

Abstract: It is an object to obtain a light source device and a projection type display device in which a fragment can be completely enclosed therein even if a discharge lamp bursts during lighting. During normal lighting of a discharge lamp (1), an internal space of a light source device (10) and an external space are spatially connected to each other through a vent hole (43) formed on a cutoff valve mechanism (45) and a vent hole (100) formed on a concave reflecting mirror (4). Cooling air is introduced and discharged between the internal space and the external space so that the discharge lamp (1) is cooled down. When the discharge lamp (1) bursts during lighting for some reason, a very strong impulsive pressure wave is generated in a moment of the burst. The pressure wave presses a movable valve (41) provided in the cutoff valve mechanism (45) through the vent hole (100).

Abstract: It is an object to obtain a light source device and a projection type display device in which a fragment can be completely enclosed therein even if a discharge lamp bursts during lighting. During normal lighting of a discharge lamp (1), an internal space of a light source device (10) and an external space are spatially connected to each other through a vent hole (43) formed on a cutoff valve mechanism (45) and a vent hole (100) formed on a concave reflecting mirror (4). Cooling air is introduced and discharged between the internal space and the external space so that the discharge lamp (1) is cooled down. When the discharge lamp (1) bursts during lighting for some reason, a very strong impulsive pressure wave is generated in a moment of the burst. The pressure wave presses a movable valve (41) provided in the cutoff valve mechanism (45) through the vent hole (100).

Abstract: A heat exchange apparatus comprising a heat transfer member; and at least one projecting blade which is arranged to confront the heat transfer member, and which carries out relative motion with respect to the heat transfer member; wherein a distance between the edge of the projecting at the side of the heat transfer member and a heat transfer surface of the heat transfer member is smaller than a value which corresponds to a rising point where an upward gradient of convective heat transfer coefficients rises as the distance decreases.

Abstract: A heat exchange apparatus comprising a heat transfer member; and at least one projecting blade which is arranged to confront the heat transfer member, and which carries out relative motion with respect to the heat transfer member; wherein a distance between the edge of the projecting blade at the side of the heat transfer member and a heat transfer surface of the heat transfer member is smaller than a value which corresponds to a rising point where an upward gradient of convective heat transfer coefficients rises as the distance decreases.

Abstract: The present invention concerns a method of preparing a porous structural unit comprising a plurality of layers having different specific gravities by pressing and heating a material including resin particles between opposing molds having a temperature difference to thereby cause the fusion or bonding of the resin particles, and a porous structural unit which improves acoustic absorption properties and heat insulation properties and in which the specific gravity is continuously changed.

Abstract: A sound attenuator has at least one sound absorber composed of a hollow body of a hard porous material and an outer or inner layer of air, and exhibits good sound-absorbing property even in a low frequency range, even if the hollow body has a small wall thickness. The hollow body may be provided with projections or a semicircular or otherwise shaped part or parts, or both, serving to maintain the outer or inner layer of air in proper shape. The device is inexpensive and yet is very reliable in quality. When the device is long, the projections in linear form are particularly useful for restraining any flanking transmission of noise and thereby enabling the device to achieve a higher rate of attenuation per unit length. The sound-absorbing property of the device can be controlled over a wide range of frequencies if the hollow body has a porosity varying continuously in a specific direction.

Abstract: A blower comprises an impeller which can function to raise the pressure of a fluid and delivers it; a driving device for driving the impeller; and a fan casing which includes a fluid path to inspire the fluid from the outside and deliver it to the outside through the impeller; wherein the fan casing is at least partly formed by a hard porous structural unit whose specific gravity is continuously changed in at least one of the direction of thickness and a direction of surface.

Abstract: The present invention concerns a method of preparing a porous structural unit comprising a plurality of layers having different specific gravities by pressing and heating a material including resin particles between opposing molds having a temperature difference to thereby cause the fusion or bonding of the resin particles, and a porous structural unit which improves acoustic absorption properties and heat insulation properties and in which the specific gravity is continuously changed.