Nec Corporation

Koichi Todoroki

Minoru Yoshikawa

Masaki Chiba

Arihiro Matsunaga

Hisato Sakuma

Masanori Sato

Kenji Kobayashi

Yoshinori Miyamoto

Nirmal Singh Rajput

Takafumi Natsumeda

Mizuki Wada

A cooling device includes: a duct that guides air that has absorbed heat generated inside a cooling target and has been discharged, to the cooling target; a cooler that is provided in the duct and cools the air flowing inside the duct; and an adjusting mechanism that is located on a downstream side of the cooler, adjusts an amount of the air discharged from the duct into a room where the cooling target is installed.

Cooling device, cooling system, and cooling method

A heat exchanger has a structure in which a heat exchanger main body through which coolant flows is obliquely installed in a box-shaped enclosure, the heat exchanger main body is constituted by a header pipe and a plurality of heat transfer pipes connected to the header pipe and disposed at predetermined intervals along a surface of a part of the header pipe, the header pipe has an area adjacent to an inner surface of the enclosure, and a seal section is provided between the inner surface of the enclosure and the area of the header pipe adjacent to the enclosure.

Heat exchanger

A cooling device includes a first evaporation unit, a second evaporation unit, a first condensation unit, a second condensation unit, common piping, a compressor, an expansion valve, a first valve, and a second valve. The common piping combines liquid-phase refrigerant flowing from the first condensation unit and liquid-phase refrigerant flowing from the second condensation unit. The first valve adjusts the liquid-phase refrigerant amount flowing into the first evaporation unit. The second valve adjusts the liquid-phase refrigerant amount flowing into the second evaporation unit. In addition, the pressure inside the common pipe is greater than the respective pressures inside the first evaporation unit and the second evaporation unit.

Cooling device, control method, and storage medium related to a plurality of evaporators and a plurality of evaporator condensers

A cooling system including a vaporizer configured to absorb heat due to a liquid-phase refrigerant being vaporized, a condenser configured to discharge heat due to a refrigerant in a gaseous phase state being liquefied, a resistance body provided in a middle of a pipe passage ranging from the vaporizer to the condenser and applying a resistance to the refrigerant, state detection sensors provided in the pipe passage on an upstream and downstream sides of the resistance body and detecting a state of the refrigerant flowing through each side inside the pipe passage, and a flow rate controller configured to detect droplets in the refrigerant flowing through the pipe passage on the basis of a difference between detection values of the state detection sensors which are detected on the upstream and downstream sides of the resistance body, and controls a flow rate of the refrigerant on the basis of detection results.

Cooling system and refrigerant control method for cooling system

A valve control device includes a receiving unit, an opening degree control unit, and a fixing control unit. The receiving unit receives information concerning the measured temperature of a fluid to be cooled that is cooled by a vaporizer in a refrigerant circulation path that is equipped with the vaporizer and a condenser. The opening degree control unit variably controls the opening degree of a valve that controls the flow rate of the refrigerant that circulates through the circulation path in accordance with the difference between the measured temperature and a target temperature provided in advance. The fixing control unit fixes the opening degree of the valve with priority over variable control performed by the opening degree control unit in the case where a fixing condition based on the difference between the measured temperature and the target temperature and a valve opening degree variation condition is satisfied.

Valve control device, cooling device, and valve control method

The present invention provides a heat exchanger including a lower header into which a liquid-phase refrigerant flows, a plurality of heat exchange pipes which branch off from the lower header and extend upwards, and an upper header which is configured to collect refrigerant received by the heat exchange pipes, in which a refrigerant inlet of the lower header is provided with a flow passage resistance adjusting hole having a cross-section smaller than a flow passage cross-section of a pipe passage for supplying the refrigerant.

Growing community of inventors

Tokyo, Japan

Koichi Todoroki