公开(公告)号：US20210337705A1

公开(公告)日：2021-10-28

申请号：US16479630

申请日：2017-03-30

Applicant: NEC Corporation

Inventor： Arihiro MATSUNAGA ,  Koichi TODOROKI ,  Hisato SAKUMA ,  Minoru YOSHIKAWA

IPC: H05K7/20 ,  F25B1/08 ,  F25B45/00 ,  F25B49/02 ,  F25B41/00 ,  F25B41/20

Abstract: The present invention provides a cooling system including a vaporizer (1) which is configured to absorb heat due to a liquid-phase refrigerant R being vaporized, a condenser (2) which is configured to discharge heat due to a refrigerant (R) in a gaseous phase state being liquefied, a resistance body (8) which is provided in a middle of a pipe passage (3) ranging from the vaporizer (1) to the condenser (2) and is configured to apply a resistance to the refrigerant (R), state detection sensors (9) which are provided in the pipe passage (3) on an upstream side and a downstream side of the resistance body (8) and are configured to detect a state of the refrigerant (R) flowing through each side inside the pipe passage (3), and a flow rate control means (C) which is configured to detect the presence of droplets in the refrigerant R flowing through the pipe passage (3) on the basis of a difference between detection values of the state detection sensors (9) which are detected on the upstream side and the downstream side of the resistance body (8), and controls a flow rate of the refrigerant (R) on the basis of detection results.

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：US20170280585A1

公开(公告)日：2017-09-28

申请号：US15506564

申请日：2015-08-20

Applicant: NEC Corporation

Inventor： Akira SHOUJIGUCHI ,  Minoru YOSHIKAWA ,  Masaki CHIBA ,  Arihiro MATSUNAGA ,  Masanori SATO

IPC: H05K7/20

CPC classification number: H05K7/20127 ,  H05K7/20309 ,  H05K7/20318 ,  H05K7/20827

Abstract: It is impossible to avoid the increase in device cost and maintenance cost in order to cool a plurality of heat sources efficiently using a natural-circulation type phase-change cooling device; therefore, a phase-change cooling device according to an exemplary aspect of the present invention includes a plurality of heat receiving units configured to hold respectively refrigerant receiving heat from a plurality of heat sources; a condensing unit configured to generate refrigerant liquid by condensing and liquefying refrigerant vapor of the refrigerant evaporated in the heat receiving units; a refrigerant vapor transport structure connecting the heat receiving units to the condensing unit and configured to transport the refrigerant vapor; and a refrigerant liquid transport structure connecting the heat receiving units to the condensing unit and configured to transport the refrigerant liquid, wherein the refrigerant liquid transport structure includes a main-liquid-pipe connected to the condensing unit, a refrigerant liquid reservoir connected to the main-liquid-pipe and configured to store the refrigerant liquid, and a plurality of sub-liquid-pipes respectively connecting the refrigerant liquid reservoir to the plurality of heat receiving units.

公开(公告)号：US20160290691A1

公开(公告)日：2016-10-06

申请号：US15036688

申请日：2014-11-10

Applicant: NEC CORPORATION ,  NEC PLATFORMS , LTD.

Inventor： Masaki CHIBA ,  Minoru YOSHIKAWA ,  Akira SHOUJIGUCHI ,  Kenichi INABA ,  Arihiro MATSUNAGA ,  Masanori SATO ,  Tadao HOSAKA ,  Yasuhito NAKAMURA

IPC: F25B41/00

CPC classification number: F25B41/003 ,  F16L41/086 ,  F25B23/006 ,  F25B2500/01

Abstract: It is difficult to avoid a decrease in cooling capacity without causing an increase in power consumption if a cooling device including a piping structure grows in size, therefore, a piping structure according to an exemplary aspect of the present invention includes a tubular part including a first flow passage through which a refrigerant flowing and a shell region surrounding the first flow passage; an introduction part composing a part of the shell region and including a second flow passage connected to the first flow passage; and a connection located at an end, between ends of the introduction part, on the side opposite to an end on a side where the second flow passage being connected to the first flow passage.

Abstract translation: 如果包括管道结构的冷却装置的尺寸增大，则难以避免冷却能力的降低而不引起功率消耗的增加，因此，根据本发明的示例性方面的管道结构包括管状部件，其包括第一 流经制冷剂的流动通道和围绕第一流动通道的壳体区域; 引导部分，构成壳体区域的一部分，并且包括连接到第一流动通道的第二流动通道; 以及位于所述导入部的端部之间的端部的与所述第二流路连接到所述第一流路的一侧的端部相反的一侧的连接。

公开(公告)号：US20160147034A1

公开(公告)日：2016-05-26

申请号：US14904450

申请日：2014-07-16

Applicant: NEC CORPORATION

Inventor： Akira SHOUJIGUCHI ,  Minoru YOSHIKAWA ,  Hitoshi SAKAMOTO ,  Masaki CHIBA ,  Kenichi INABA ,  Arihiro MATSUNAGA

IPC: G02B7/02 ,  G03B21/16 ,  F28D15/02 ,  G02B27/00

CPC classification number: G02B7/028 ,  F28D15/02 ,  F28D15/0266 ,  G02B27/0006 ,  G03B21/16

Abstract: A cooling structure of a sealed casing according to the present invention includes sealed containers for housing heat-generation components irradiated with light from a light source to generate heat, an evaporation unit disposed in the sealed container to store a refrigerant, a condensation unit configured to liquefy the refrigerant gasified by the heat received from the heat-generation component, a steam pipe configured to connect the evaporation unit and the condensation unit, through which the gasified refrigerant flows, and a liquid pipe configured to connect the evaporation unit and the condensation unit to each other, through which the liquefied refrigerant flows. Thus, a cooling structure capable of preventing performance deterioration of a cooling target device can be achieved.

Abstract translation: 根据本发明的密封壳体的冷却结构包括用于容纳照射来自光源的光的发热部件以产生热的密封容器，设置在密封容器中以储存制冷剂的蒸发单元，冷凝单元，其构造成 液化通过从发热部件接收的热量气化的制冷剂，配置成连接蒸发单元和冷凝单元的蒸气管，气化的制冷剂流过冷凝单元;液体管，被配置为将蒸发单元和冷凝单元 彼此通过液化制冷剂流过。 因此，能够实现能够防止冷却对象装置的性能恶化的冷却结构。

公开(公告)号：US20160018143A1

公开(公告)日：2016-01-21

申请号：US14378659

申请日：2013-02-13

Applicant: NEC CORPORATION

Inventor： Kenichi INABA ,  Minoru YOSHIKAWA ,  Hitoshi SAKAMOTO ,  Akira SHOUJIGUCHI ,  Masaki CHIBA ,  Arihiro MATSUNAGA

IPC: F25B43/00 ,  F25B39/00

CPC classification number: F25B43/00 ,  F25B39/00 ,  F25B39/02 ,  F25B39/04 ,  F28D15/0266 ,  G06F1/20 ,  H05K7/20818

Abstract: A cooling apparatus includes N (N is an integer of 2 or larger) refrigerant storage units arranged in a vertical direction and configured to store refrigerants, a condensation unit disposed above the N refrigerant storage units, a steam pipe for circulating gas phase refrigerants flowing out of the N refrigerant storage units to the condensation unit, a liquid pipe for circulating a liquid phase refrigerant flowing out of the condensation unit to an uppermost refrigerant storage unit, and separation piping for circulating a liquid phase refrigerant flowing out of an upper refrigerant storage unit to a lower refrigerant storage unit. The liquid phase refrigerant flows into each refrigerant storage unit via an inlet, and flows out from the refrigerant storage unit via a first connection port formed below the inlet.

Abstract translation: 一种冷却装置，其特征在于，包括N个（N为2以上的整数）制冷剂储存单元，其沿垂直方向配置，构成为储存制冷剂，冷凝单元设置在所述N个制冷剂储存单元的上方;蒸气管，其使流出的气相制冷剂循环 的N个制冷剂储存单元的冷凝装置，将从冷凝装置流出的液相制冷剂循环到最上层的制冷剂储存部的液体管，以及使从上部制冷剂储存部流出的液相制冷剂循环的分离配管 到下部制冷剂储存单元。 液相制冷剂经由入口流入各制冷剂储存单元，经由形成在入口下方的第一连接口从制冷剂储存单元流出。

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.

公开(公告)号：US20180054919A1

公开(公告)日：2018-02-22

申请号：US15557709

申请日：2016-03-09

Applicant: NEC Corporation

Inventor： Minoru YOSHIKAWA ,  Masanori SATO ,  Akira SHOUJIGUCH! ,  Arihiro MATSUNAGA ,  Masaki CHIBA

IPC: H05K7/20 ,  G06F1/20 ,  F28D15/06

Abstract: To address the problem of deterioration of cooling performance of a phase-change cooling apparatus cooling a plurality of heat-emitting bodies because of changes in the amount of heat emitted by the plurality of heat-emitting bodies, a refrigerant supply device according to the present invention includes: a first reservoir for storing refrigerant liquid caused to flow by a drive pump; and a refrigerant liquid amount adjustment means for adjusting the flow rate of the refrigerant liquid flowing out of the first reservoir to a heat reception unit wherein the reservoir includes a branch outlet, wherein the branch outlet is provided in a position higher than the refrigerant liquid amount adjustment means, and wherein refrigerant liquid stored in the first reservoir flows out of the branch outlet to a second reservoir disposed in a position lower than the first reservoir.

公开(公告)号：US20170280594A1

公开(公告)日：2017-09-28

申请号：US15504074

申请日：2015-08-20

Applicant: NEC Corporation

Inventor： Masanori SATO ,  Kenichi INABA ,  Minoru YOSHIKAWA ,  Akira SHOUJIGUCHI ,  Masaki CHIBA ,  Arihiro MATSUNAGA

IPC: H05K7/20 ,  G05B15/02

CPC classification number: H05K7/20836 ,  G05B15/02 ,  H05K7/20745 ,  H05K7/20827 ,  Y02D10/16

Abstract: A rack louver 120 controls an air flow of outside air external to an enclosure 10 taken into the enclosure 10, flowing from an inlet 20 to an outlet 30 in a rack 60. An outlet louver 130 controls an air flow of inside air internal to the enclosure 10 flowing out from the outlet 30 to outside the enclosure 10. A system control unit 150 adjusts motive power of a blowing unit 40, a degree of opening of the rack louver 120, and a degree of opening of the outlet louver 130 in accordance with an outside-air temperature measured by an outside-air temperature sensor 50 and electronic equipment power consumption measured by a power sensor 100. Consequently, electronic equipment in the rack can be cooled with higher energy efficiency while suppressing temperature rise in the electronic equipment.