In a refrigerating cycle using a refrigerant containing hydrofluorocarbon as a main component, of a refrigerant pipe arrangement constituting the refrigerating cycle, a refrigerant pipe extending upward from a lower side to an upper side is made to have an inner diameter not larger than a value which makes the flow rate of the refrigerant be not smaller than a zero penetration flow rate. It is possible to obtain a refrigerating cycle superior in oil returning to a compressor and hence high in re...

In a refrigerating cycle (air conditioner) using mixture refrigerant, a mixing ratio of the refrigerant in a refrigerant circuit is measured by a mixing ratio detector, and a controller receives the detection signal to open a control valve when the mixing ratio of a high boiling-point refrigerant component is low, whereby the high boiling-point refrigerant stocked in a liquid reservoir is returned to the refrigerant circuit. The high boiling-point refrigerant which is supplied from the liquid re...

In an ejector cycle with an ejector including a nozzle for decompressing refrigerant, a variable throttle is disposed upstream from the nozzle of the ejector to decompress and expand high-pressure refrigerant flowing from a radiator. For example, the variable throttle decompresses and expands the high-pressure refrigerant in a gas-liquid two-phase state at an upstream position from the nozzle of the ejector. The variable throttle controls a throttle opening degree so that a refrigerant super-hea...

In an ejector cycle with an ejector including a nozzle for decompressing refrigerant, a variable throttle device is disposed upstream from the nozzle to decompress and expand high-pressure refrigerant flowing from a condenser. For example, the variable throttle device decompresses the high-pressure refrigerant in a gas-liquid two-phase state at an upstream position from the nozzle of the ejector. In addition, the variable throttle device includes a back pressure chamber having an inner pressure ...

According to the method, a reactor core is shut down during the operation cycle. One or more fuel bundles of the reactor core are then moved to new positions within the reactor core to increase a total energy, output of the reactor core as compared to continuing operation of the reactor core without the shutting down and moving steps.

A refrigeration process comprising: compressing low pressure vapor refrigerant to a higher temperature and pressure vapor, compressing low pressure vapor refrigerant to a higher temperature and pressure vapor, condensing the higher pressure vapor refrigerant into a liquid refrigerant at the higher pressure, thermally isolating the higher pressure liquid, cooling the thermally isolated liquid refrigerant while remaining thermally isolated and then allowing thermal contact of the remaining low tem...

A motorized cycle having a frame/chassis supporting a seat and handle grips, on one hand, and front and rear wheels, on the other hand, via a single, vertically-extending frame portion extending therebetween. Such frame/chassis defines voids in the front and rear of the motorized cycle and is further preferably configured such that the height of the seat and handle grips can be selectively adjusted. The motorized cycle otherwise utilizes conventional motorcycle/scooter parts and accessories. The...

A children's cycle comprising frames, wheels under the frames and a push-handle connected with the frames. The push-handle is arcuate in shape and movably connected with the frames. The push-handle may be turned down to the underside of the cycle body with its arcuate concave facing upward so that the cycle body is supported by the push-handle. The push-handle may be used for pushing or pulling the cycle, and may be turned down to the underside of the cycle body for rocking the cycle forward and...

In an ejector cycle having an ejector for decompressing refrigerant, a check valve is disposed in an oil return passage through which refrigerant including a lubrication oil is introduced from a refrigerant outlet side of an evaporator to a refrigerant suction side of a compressor while bypassing the ejector. When the lubrication oil amount staying in the evaporator reduces, the check valve is automatically closed, and a normal operation mode of the ejector cycle is automatically set. On the con...

An exercise cycle includes a frame having a front wheel assembly and handlebars. The front wheel assembly includes a fan wheel having side plates one of which has an intake port, and an intake assembly around the intake port, the intake assembly having openings which may be opened and closed. By opening and closing the intake openings, the resistance of the wheel to the air can be varied without changing the rotational rate of the wheel. The handlebars of the exercise cycle are pivotally connect...