Abstract: A refrigerant control system for controlling a first refrigerant flowing through a first circulation passage connected to a compression unit, including a storing unit which stores a first refrigerant, a first sub-pipe which is connected to an outlet side pipe, a second sub-pipe which is connected to an inlet side pipe, a first opening/closing valve which is provided in the first sub-pipe and is capable of switching whether to flow the first refrigerant in the outlet side pipe to the storing unit, a second opening/closing valve which is provided in the second sub-pipe and is capable of switching whether to flow the first refrigerant in the storing unit to the inlet side pipe, and an opening/closing control unit which controls an opening/closing state of the first opening/closing valve and the second opening/closing valve on the basis of a setting temperature of a second refrigerant set according to a predetermined method.

Abstract: A refrigerant control system includes: a storage part which stores a first refrigerant; a first sub-pipe which is connected to an outlet side pipe of a first circulation flow path; a second sub-pipe which is connected to an inlet side pipe of the first circulation flow path; a third sub-pipe which is connected to the inlet side pipe and is formed so that heat of the third sub-pipe lower than heat of the outlet side pipe is able to be transferred to the first refrigerant in the storage part a first opening and closing valve which is provided in the first sub-pipe; a second opening and closing valve which is provided in the second sub-pipe; a third opening and closing valve which is provided in the third pipe; and an opening and closing control unit which performs opening and closing control of the first opening and closing valve, the second opening and closing valve, and the third opening and closing valve on the basis of a set temperature of a second refrigerant.

Abstract: A refrigerant control system for controlling a first refrigerant flowing through a first circulation passage connected to a compression unit, including a storing unit which stores a first refrigerant, a first sub-pipe which is connected to an outlet side pipe, a second sub-pipe which is connected to an inlet side pipe, a first opening/closing valve which is provided in the first sub-pipe and is capable of switching whether to flow the first refrigerant in the outlet side pipe to the storing unit, a second opening/closing valve which is provided in the second sub-pipe and is capable of switching whether to flow the first refrigerant in the storing unit to the inlet side pipe, and an opening/closing control unit which controls an opening/closing state of the first opening/closing valve and the second opening/closing valve on the basis of a setting temperature of a second refrigerant set according to a predetermined method.

Abstract: A refrigerant control system includes: a storage part which stores a first refrigerant; a first sub-pipe which is connected to an outlet side pipe of a first circulation flow path; a second sub-pipe which is connected to an inlet side pipe of the first circulation flow path; a third sub-pipe which is connected to the inlet side pipe and is formed so that heat of the third sub-pipe lower than heat of the outlet side pipe is able to be transferred to the first refrigerant in the storage part a first opening and closing valve which is provided in the first sub-pipe; a second opening and closing valve which is provided in the second sub-pipe; a third opening and closing valve which is provided in the third pipe; and an opening and closing control unit which performs opening and closing control of the first opening and closing valve, the second opening and closing valve, and the third opening and closing valve on the basis of a set temperature of a second refrigerant.

Abstract: A constant temperature controller inexpensive and easy to operate, yet capable of accurately controlling the temperature with significantly reduced heat energy consumption, is provided. An operation mode of a cooler is switched between an idling mode and a loaded mode, based on a difference in temperature between a first temperature sensor and a third temperature sensor. For switching the operation mode, cooling power of the cooler is adjusted by changing a frequency of an inverter driving a compressor. Under the loaded mode, the cooling power of the cooler is adjusted by an aperture of an electronic expansion valve such that a difference between a temperature of a second sensor and a target temperature of a heater becomes a constant value.

Abstract: Scrap bars of extruded goods are reclaimed as billets for extrusion. An external force is applied to an aggregate of scraps, in which the scraps are piled in the form of a bundle having a predetermined length, so as to reduce its size in directions perpendicular to the longitudinal axes of the scrap bars, thereby forming a billet. The extruded goods produced from the billet have almost no pores and are not inferior to those produced from cast billets.