公开(公告)号：US20220279682A1

公开(公告)日：2022-09-01

申请号：US17624910

申请日：2019-07-09

Applicant: NEC Corporation

Inventor： Takafumi NATSUMEDA ,  Minoru YOSHIKAWA ,  Masaki CHIBA

IPC: H05K7/20

Abstract: A cooling system includes: a local cooler that is positioned near a heat source and evaporates a liquid-phase refrigerant by receiving heat from the heat source; a turbo compressor that compresses a gas-phase refrigerant that absorbed the heat in the local cooler; an outdoor unit that condenses the gas-phase refrigerant supplied from the turbo compressor by heat dissipation; and an expansion valve that depressurizes the refrigerant supplied from the outdoor unit and sends the refrigerant to the local cooler. The refrigerant is a low-pressure refrigerant having a condensing pressure lower than a predetermined value.

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：US20200300554A1

公开(公告)日：2020-09-24

申请号：US16088197

申请日：2017-03-21

Applicant: NEC Corporation

Inventor： Masaki CHIBA ,  Mahiro HACHIYA ,  Minoru YOSHIKAWA

IPC: F28D15/02 ,  H05K7/20

Abstract: An evaporator includes: a first surface which conducts heat; a heat medium in the evaporator, which vaporizes as a result of the heat absorbed; a condenser which liquefies the heat medium in a vaporized state; a vapour pipe which guides the heat medium in the vaporized state from the evaporator to the condenser; and a liquid pipe which guides the heat medium in a liquefied state from the condenser to the evaporator. A first opening of the vapour pipe and a second opening of the liquid pipe are disposed in different positions from each other in a first direction, and are disposed so as to open into a heat medium accommodation space inside the evaporator at different positions from each other in a second direction, and which is different to the first direction, and also at different positions from each other in a third direction which intersects the first surface.

公开(公告)号：US20200281091A1

公开(公告)日：2020-09-03

申请号：US16643896

申请日：2017-09-06

Applicant: NEC Corporation

Inventor： Minoru YOSHIKAWA ,  Hisato SAKUMA ,  Yoshinori MIYAMOTO ,  Masaki CHIBA

IPC: H05K7/20

Abstract: When an enclosed space is formed, by at least one of surfaces forming an exterior shape of a shielding member and an intake or exhaust surface among surfaces forming an exterior shape of heat-generating housings, in such a way that a taken-in airflow and an exhausted airflow of the heat-generating housings installed in at least two rows can be separated or substantially separated, a cooling system includes: a duct formed to be able to separate or substantially separate a first airflow and a second airflow being intake/exhaust of a specific heat-generating housing among the heat-generating housings, and heat-generating housings other than the specific heat-generating housing, respectively; and a cooling enhancement unit enhancing cooling for the specific heat-generating housing by acting on the first airflow, thereby avoiding occurrence of a hot spot due to a high-heat-generating housing, in a system building an air-conditioning environment such as aisle capping.

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：US20160338226A1

公开(公告)日：2016-11-17

申请号：US15110888

申请日：2015-01-15

Applicant: NEC CORPORATION

Inventor： Hitoshi SAKAMOTO ,  Minoru YOSHIKAWA ,  Mahiro HACHIYA

IPC: H05K7/20

CPC classification number: H05K7/20336 ,  F28D15/0266 ,  H01L23/427 ,  H01L23/467 ,  H01L2924/0002 ,  H05K7/20136 ,  H05K7/20327 ,  H05K7/20409 ,  H05K7/20436 ,  H05K7/20809 ,  H01L2924/00

Abstract: A cooling device 100 includes a first heat receiving unit 400, a second heat receiving unit 410, a first heat dissipating unit 700, and a second heat dissipating unit 710. The first heat dissipating unit 700 and the second heat dissipating unit 710 have a flat plate shape and have a structure in which air passes in a direction approximately perpendicular to a principal surface having a flat plate shape and a first principal surface 730 that is a principal surface having a flat plate shape in the first heat dissipating unit 700 and a second principal surface 740 that is a principal surface having a flat plate shape in the second heat dissipating unit 710 are arranged so as to face to each other. As a result, the size of the cooling device 100 can be reduced without degrading a heat dissipation performance to dissipate heat generated by a heat generating element.

Abstract translation: 冷却装置100包括第一受热单元400，第二受热单元410，第一散热单元700和第二散热单元710.第一散热单元700和第二散热单元710具有平坦 并且具有这样的结构，其中空气在大致垂直于具有平板形状的主表面的方向上流动，而第一主表面730是第一散热单元700中具有平板形状的主表面，第二主表面730 在第二散热单元710中具有平板形状的主表面的主表面740被布置成彼此相对。 结果，可以降低冷却装置100的尺寸，而不会降低散热性能以散发由发热元件产生的热量。

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。