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公开(公告)号：US20220192057A1
公开(公告)日：2022-06-16
申请号：US17603111
申请日：2020-04-13
Applicant: NEC Corporation
Inventor： Koichi TODOROKI , Minoru YOSHIKAWA , Kunihiko ISHIHARA , Masaki CHIBA , Yoshinori MIYAMOTO , Takafumi NATSUMEDA , Nirmal Singh RAJPUT
Abstract: A local cooler includes: a housing formed into a box shape; a heat exchanger provided along a slope extending upward to a rear portion from a lower position located on the front side of the housing; a first intake/exhaust port provided on a front surface of the housing; a second intake/exhaust port provided on a bottom surface of the housing; third intake/exhaust ports provided at a plurality of locations among side surfaces, upper surface and rear surface of the housing; and a closing plate capable of selectively shielding these intake/exhaust ports.
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公开(公告)号：US20220146167A1
公开(公告)日：2022-05-12
申请号：US17520901
申请日：2021-11-08
Applicant: NEC Corporation
Inventor： Yoshinori MIYAMOTO , Minoru YOSHIKAWA , Masaki CHIBA
Abstract: A cooling apparatus includes a heat receiver that evaporates a low pressure heat transfer medium; a compressor that compresses the evaporated heat transfer medium in a gas phase state, a condenser that condenses the compressed heat transfer medium, a receiver tank that receives and stores at least one of the heat transfer medium from any place in a flow path of the heat transfer medium in the gas phase state that returns the heat transfer medium to the heat receiver and the condensed heat transfer medium in a liquid phase state, an air storage tank that introduces and stores air separated from the heat transfer medium in the receiver tank, and a liquid level controller that controls a liquid level in the receiver tank such that the heat transfer medium in the liquid phase state is stored in the receiver tank at a predetermined liquid level height.
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公开(公告)号：US20210278884A1
公开(公告)日：2021-09-09
申请号：US16498131
申请日：2017-03-29
Applicant: NEC CORPORATION
Inventor： Yoshinori MIYAMOTO , Manussanun BURANACHOKPHAISAN , Minoru YOSHIKAWA
IPC: G06F1/20 , G05B19/4155
Abstract: A management device includes: storage unit which stores a known intake air temperature of a heating element, and a heat transfer characteristic of a cooling device; heat extraction amount calculation unit which calculates a heat extraction amount of the cooling device, by use of the refrigerant information input by the input means, and a cooling capacity of the refrigerant; and air volume calculation unit which calculates an air volume of air supplied to the cooling device, by applying the heat extraction amount to air volume dependence of the heat extraction amount, being derived by use of air volume dependence of a difference temperature between a temperature of the refrigerant and a temperature of exhaust air from the heating element, and the heat transfer characteristic, the air volume dependence of the difference temperature being derived by use of the intake air temperature, the power consumption, and the refrigerant information.
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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.
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公开(公告)号：US20240142122A1
公开(公告)日：2024-05-02
申请号：US18279705
申请日：2022-03-02
Applicant: NEC Corporation
Inventor： Yoshinori MIYAMOTO , Minoru YOSHIKAWA , Koichi TODOROKI
CPC classification number: F24F7/06 , F24F13/10 , F24F2110/10
Abstract: The cooling system includes a duct that draws in air that is drawn in from an intake side of a cooling target, which is disposed in a room adjusted to a predetermined temperature, that absorbs the heat of the cooling target, and that is exhausted from an exhaust side of the cooling target, and that guides the air to the intake side; a cooler that is provided in the duct and that cools the air; a monitoring device that monitors a cooling state of at least one of the cooling target and the cooler; and a duct adjustment device that operates the duct to guide the air in the duct in a direction different from a direction toward the intake side when the monitoring device detects an abnormality in the cooling state.
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Patent Agency Ranking
公开(公告)号：US20220377944A1
公开(公告)日：2022-11-24
申请号：US17764293
申请日：2019-10-02
Applicant: NEC Corporation
Inventor： Nirmal Singh RAJPUT , Masaki CHIBA , Mahiro HACHIYA , Takafumi NATSUMEDA , Yoshinori MIYAMOTO , Minoru YOSHIKAWA
Abstract: The present invention provides an attachment for a server rack cooling system having at least one heat exchange condenser, the attachment includes: a pipe extension configured to connect to a portion of the server rack cooling system at which air and refrigerant are able to be transferred into the attachment from the at least one heat exchange condenser; a valve on the pipe extension configured to allow exhaust to the outside through the pipe extension at an open position and to block exhaust to the outside at a closed position; and an sensor disposed at a position inside of the pipe extension between the at least one heat exchange condenser and the valve and configured to provide a detection signal determined by a presence of fluid at the position of the sensor; wherein, the valve is opened and closed based on the detection signal from the sensor.
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公开(公告)号：US20220141993A1
公开(公告)日：2022-05-05
申请号：US17505805
申请日：2021-10-20
Applicant: NEC Corporation
Inventor： Kenji KOBAYASHI , Kunihiko ISHIHARA , Koichi TODOROKI , Yoshinori MIYAMOTO , Minoru YOSHIKAWA
IPC: H05K7/20
Abstract: A cooling apparatus includes a duct provided above a cooling target and configured to guide an air discharged after absorbing heat generated inside the cooling target to the cooling target, a cooler provided in the duct and configured to cool the air flowing in the duct, and an adjusting mechanism provided downstream of the cooler and configured to adjust the air discharged from the duct to the cooling target, and the duct receives the air discharged from one side of the cooling target and directed upward, guides the air to another side of the cooling target, and discharges the air downward on the other side, and the adjusting mechanism changes a position of an opening at a discharge port of the duct.
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公开(公告)号：US20210003327A1
公开(公告)日：2021-01-07
申请号：US16982790
申请日：2019-03-20
Applicant: NEC Corporation
Inventor： Koichi TODOROKI , Minoru YOSHIKAWA , Kunihiko ISHIHARA , Masaki CHIBA , Yoshinori MIYAMOTO , Takafumi NATSUMEDA , Nirmal Singh RAJPUT
IPC: F25B41/00
Abstract: In order to efficiently distribute a heat medium at a low heat medium pressure, a heat exchange apparatus includes a heat exchange pipe 2 configured to accommodate a heat medium L to be evaporated by heat absorption from a gas to be cooled, the heat exchange pipe being disposed in an inclined state, a supply pipe 1 configured to supply the heat medium L in a liquid-phase state, the supply pipe being placed in a vicinity of a lower part of the heat exchange pipe 2, a discharge pipe 3 configured to receive a heat medium L to be evaporated in the heat exchange pipe 2 and discharged from an upper part of the heat exchange pipe, and a connecting pipe 4 placed, directing downward, between an upper part of the heat exchange pipe 2 and the discharge pipe 3.
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公开(公告)号：US20220279684A1
公开(公告)日：2022-09-01
申请号：US17624917
申请日：2019-07-09
Applicant: NEC Corporation
Inventor： Yoshinori MIYAMOTO , Takafumi NATSUMEDA , Minoru YOSHIKAWA
Abstract: A cooling system includes: a local cooler that is positioned near a server serving as a heat source and that evaporates a refrigerant by directly receiving heat from the server to generate a gas-phase refrigerant; a compressor that compresses the gas-phase refrigerant; an outdoor unit that condenses the gas-phase refrigerant supplied from the compressor by dissipating heat from the gas-phase refrigerant; an expansion valve that depressurizes the refrigerant supplied from the outdoor unit and sends the refrigerant to the local cooler; a pair of detectors that are respectively provided at an inlet side and an outlet side of the compressor and detect a state of the gas-phase refrigerant supplied from the local cooler; and a proportional control valve and a high-speed on-off valve that are operated based on a refrigerant state ratio calculated from a detection value of the detectors.
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公开(公告)号：US20220170662A1
公开(公告)日：2022-06-02
申请号：US17437205
申请日：2020-01-23
Applicant: NEC Corporation
Inventor： Yoshinori MIYAMOTO , Minora YOSHIKAWA , Nirmal Singh RAJPUT , Takafumi NATSUMEDA
Abstract: An air conditioning control device includes a differential pressure calculation unit that calculates differential pressure between the intake side and the exhaust side of a rack containing at least one server, and a rotational speed control unit that controls the rotational speed of an air conditioning fan on the basis of the differential pressure. The rotational speed control unit increases or decreases the rotational speed of the air conditioning fan depending on the variation of the differential pressure in the event of a change in the rotational speed of the air conditioning fan.
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