摘要:
A radiological imaging apparatus of the present invention includes an X-ray source for emitting an X-ray, a γ-ray detecting section for outputting a detection signal of a γ-ray, and an X-ray detecting section for outputting a detecting signal of an X-ray. The X-ray source moves around a bed for placing an examinee. The γ-ray detecting section has a plurality of radiation detectors aligned in the longitudinal direction of the bed and placed around the bed. The X-ray detecting section is positioned in a region formed between one end and the other end of the γ-ray detecting section in the longitudinal direction of the bed. The X-ray source is also positioned in the region. Since the X-ray detecting section is placed in the region, it is possible to accurately combine a PET image and an X-ray computed tomographic image.
摘要:
A radioisotope production apparatus includes: a linear accelerator for accelerating an ion beam and irradiating a target with the ion beam, radio frequency power supplies for supplying radio frequency waves through coaxial tubes and the linear accelerator, a target shield member containing the target, a first radiation shield member covering the linear accelerator, and a movable second radiation shield member covering the side of target shield member of the linear accelerator between the first radiation shield member and the target shield member. The first radiation shield member is movably divided in opposite directions, respectively, of the axial direction of the linear accelerator from the base point of the connection point of the coaxial tube connected to the linear accelerator.
摘要:
A predistortion distortion signal generating unit uses a signal to be amplified to generate a predistortion distortion signal including odd-order signal components of the signal. A delay time difference adjusting unit adjusts a delay time difference between a signal to be amplified and a distortion signal for predistortion such that an influence by the memory effect occurring in the amplifier can be reduced. A predistortion distortion signal giving unit gives a predistortion distortion signal to a signal to be amplified in a form that the delay time difference is adjusted.
摘要:
An air conditioner capable of conducting a natural circulation operation by circulating refrigerant through an evaporator and a condenser located at a higher position than the evaporator, which are connected with pipes, wherein the air conditioner has means for obtaining an air conditioning load quantity to an outdoor air temperature in a temperature range, means for obtaining an air conditioning ability quantity to an outdoor air temperature in a temperature range in a case of using a predetermined mount of refrigerant, means for obtaining the maximum outdoor air temperature capable of conducting air conditioning at the time when an air conditioning load quantity produced from the means for obtaining an air conditioning load quantity substantially coincides with an air conditioning ability quantity from the means for determining an amount of refrigerant, as an amount to be charged, in which a maximum outdoor air temperature capable of conducting air conditioning among the obtained maximum outdoor air temperatures becomes the maximum.
摘要:
An endless track continuous casting machine having a pair of upper and lower endless belts facing each other in a spaced apart relationship and travelling in a downwardly slanted direction which form the long side walls of a mold. Dam blocks continuously and closely disposed and pinched between both side edges of the pair of endless belts and each supported by a link forming part of an endless chain wound around sprockets disposed on each side of the pair of endless belts form the short side walls of the mold. The dam blocks are mounted on each of the links of the endless chain to be movable inwardly and outwardly, and they are guided by a guiding mechanism to a projecting position when entering the advancing path of the mold and are guided to a set back position when entering the returning route. This guiding mechanism is adjustable to change the projected position of each dam block while the endless chain is moving, thus enabling the width of a cast piece to be altered without stopping the casting work.
摘要:
An internal heat exchanger and a first flow control valve are connected in series between a condenser and a refrigerant inlet of an ejector. A gas refrigerant outlet of a gas-liquid separator is connected to a suction port of a compressor. A first bypass circuit connects a refrigerant outlet of the condenser to an intermediate pressure portion of the compressor via a second flow control valve and the internal heat exchanger. A second bypass circuit connects a refrigerant outlet of the internal heat exchanger to the liquid refrigerant outlet of the gas-liquid separator via a third flow control valve. While the second flow control valve is opened such that the refrigerant flows through the first bypass circuit, the fourth flow control valve is switched to be opened or closed, and the third flow control valve is switched to be closed or opened.
摘要:
Plate-like fins have notches longer than a longitudinal axis of flat tubes that are placed in the notches. The plate-like fins also have bend portions that are located on projections projecting toward the edges more than the ends of the flat tubes, are formed by bending part of the plate-like fins, erect in a stacking direction in which the plate-like fins are stacked, and are in contact with adjacent ones of the plate-like fins. The height of the bend portions in the stacking direction is the length of a predetermined spacing.
摘要:
A plate fin includes a slit structure formed by cutting and raising a portion of the plate fin to form an opening facing a flow direction of a fluid and a waffle structure formed by bending a portion of the plate fin to form a protrusion having an angle-shaped cross section which protrudes in a stack direction and having a ridge substantially perpendicular to the air flow direction, and the waffle structure is disposed on the upstream side on the plate fins with respect to the slit structure and a slant length L1 on the upstream side of the waffle structure is smaller than a slant length L2 on the downstream side of the waffle structure.
摘要:
The heat exchanger includes heat exchange units. Each of the heat exchange units includes a plurality of plate fins and a plurality of flat tubes. The plate fins are arranged spaced apart from one another at intervals so as to allow air to flow therebetween. The flat tubes each have an L shape by bending and inserted through the plate fins so that a refrigerant flows therethrough in a direction in which the plate fins are arranged. The heat exchange units are combined to each other so as to form a rectangular shape. Thus, heat exchange can be efficiently performed by increasing the mounting area.
摘要:
In a heat pump apparatus of an indirect type including a primary circuit on a heat source side and a secondary circuit on a load side, a refrigerant in the primary circuit is prevented from leaking through the secondary circuit.An air-conditioning apparatus includes a leakage detecting device that detects leakage of the refrigerant circulated through a refrigerant circuit, serving as the primary circuit, from an intermediate heat exchanger into a water circuit, serving as the secondary circuit, and a controller that closes valves arranged on both sides of the intermediate heat exchanger in the water circuit to prevent water containing the refrigerant from flowing beyond the valves when the leakage detecting device detects the leakage.