公开(公告)号：US20190003776A1

公开(公告)日：2019-01-03

申请号：US16064519

申请日：2016-12-19

Applicant: NEC CORPORATION

Inventor： Arihiro MATSUNAGA ,  Masaki CHIBA ,  Masanori SATO ,  Koichi TODOROKI ,  Mizuki WADA ,  Minoru YOSHIKAWA

IPC: F28D15/02

Abstract: It is impossible, in a phase-change cooling apparatus in which a refrigerant flows in a gas-liquid two-phase state, to enhance cooling capacity sufficiently even though a heat-radiating region is enlarged; therefore, a heat radiation apparatus according to an exemplary aspect of the present invention includes gas-phase refrigerant diffusion means into which a refrigerant in a gas-liquid two-phase state flowing, the gas-phase refrigerant diffusion means being filled with a gas-phase refrigerant included in the refrigerant in the gas-liquid two-phase state; heat-radiating means including a first header, a second header, and a plurality of heat-radiating pipes connecting the first header to the second header, the gas-phase refrigerant flowing through the plurality of heat-radiating pipes; and gas-phase-side connection means for connecting the gas-phase refrigerant diffusion means to the first header, the gas-phase refrigerant flowing in the gas-phase-side connection means.

公开(公告)号：US20200224983A1

公开(公告)日：2020-07-16

申请号：US16650187

申请日：2018-09-18

Applicant: NEC CORPORATION

Inventor： Masanori SATO ,  Koichi TODOROKI ,  Arihiro MATSUNAGA ,  Mizuki WADA ,  Minoru YOSHIKAWA

IPC: F28F27/02 ,  F25B19/00

Abstract: Provided are a phase change cooling device and a control method, whereby stable high-efficiency cooling performance can be obtained according to heat exchange performance. This phase change cooling device includes: a heat receiver which accommodates a coolant and receives heat from a heat generation body which is to be cooled; a heat radiator which radiates the heat of a coolant vapor of the coolant gasified by receiving heat by means of the heat receiver, and recirculates a liquefied liquid coolant to the heat receiver; a valve for controlling the flow rate of the liquid coolant; and a control means for controlling the opening degree of the valve, wherein the control means controls the opening degree of the valve on the basis of an exhaust temperature, which is the temperature after being discharged from the heat receiver, and the temperature in the vicinity of the heat radiator.

公开(公告)号：US20190277572A1

公开(公告)日：2019-09-12

申请号：US16335164

申请日：2017-09-15

Applicant: NEC Corporation

Inventor： Arihiro MATSUNAGA ,  Minoru YOSHIKAWA ,  Masaki CHIBA ,  Hisato SAKUMA ,  Masanori SATO ,  Mizuki WADA ,  Koichi TODOROKI

IPC: F28D15/02 ,  G06F1/20 ,  H05K7/20

Abstract: A phase-change cooling apparatus according to an exemplary aspect of the present invention includes an evaporator a condenser; a refrigerant liquid driving means for circulating the refrigerant liquid; a first piping section configured to connect the evaporator and the condenser; a second piping section configured to connect the condenser to the refrigerant liquid driving means; a third piping section configured to connect the refrigerant liquid driving means to the evaporator; a refrigerant pooling means for pooling the refrigerant liquid, the refrigerant pooling means being located in a flow path constituted by the second piping section; and a fourth piping section, with one end of the fourth piping section connected to the first piping section at a first connecting point, and another end of the fourth piping section connected to the refrigerant pooling means at a second connecting point.