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1. 发明专利

SG176365A1 COOLING METHOD AND COOLING SYSTEM FOR ELECTRONIC DEVICE 未知
公开(公告)号：SG176365A1
公开(公告)日：2011-12-29
申请号：SG2011030905
申请日：2011-04-29
申请人： HITACHI PLANT TECHNOLOGIES LTD
发明人： YASUHIRO KASHIRAJIMA , JUNICHI ITO , YASUHIKO INADOMI , MASAKATSU SENDA , RYOJI SHIMOKAWA , NOBORU OSHIMA , TAKUMI SUGIURA
IPC分类号： F24F11/76
摘要： COOLING METHOD AND COOLING SYSTEM FOR ELECTRONIC DEVICEProvided is a cooling method for an electronic device, including: naturally circulating a refrigerant between: evaporators (20X and 20Y) which each vaporize the refrigerant by heat exchange with exhaust hot air from a server (14), and cools the exhaust hot air; and a cooling tower (22) which is placed at a position higher than theevaporators (20X and 20Y), and liquefies the vaporized refrigerant; and valve-controlling a flow rate of a refrigerant liquid to be supplied to the evaporators (20X and 20Y) so that an air temperature after heat has been exchanged for cooling by the evaporators (20X and 20Y) becomes a temperature suited to an operating environment of the server (14), inwhich a condensation temperature or a condensation pressure of a refrigerant gas in thecooling tower (22) does not fluctuate even when the flow rate of the refrigerant liquid to be supplied to the evaporators (20X and 20Y) is valve-controlled. Accordingly, it ispossible to stably maintain a natural circulation of a refrigerant and to prevent dew condensation from being caused on a surface of an evaporator, even when a flow rate of the refrigerant of the evaporator is valve-controlled in a cooling system having arefrigerant natural circulation system.Figure 1

2. 发明专利

SG189656A1 COOLING SYSTEM AND COOLING METHOD 未知
公开(公告)号：SG189656A1
公开(公告)日：2013-05-31
申请号：SG2012077749
申请日：2012-10-18
申请人： HITACHI PLANT TECHNOLOGIES LTD
发明人： YASUHIKO INADOMI , YASUHIRO KASHIRAJIMA , JUNICHI ITO , TOMOHIRO YOSHIDA
摘要： Cooling system and cooling method that enable preventingbreakdown of coolant pump is provided. The cooling system, includes: evaporator for evaporating coolant by heat exchange with indoor air as anobject of air conditioning; condenser for cooling and condensing coolant evaporated by evaporator: coolant liquid storage section that communicates with condenser and stores coolant liquid flowing in from condenser; coolant10 pump that communicates with coolant liquid storage section and pressure-transmits coolant liquid toward evaporator, the coolant liquid flowing in from coolant liquid storage section; coolant liquid detection units for individually detecting whether or not liquid level of coolant liquid stored in coolant liquid storage section is higher than or equal to respective plural heights including first height and second height higher than first height in coolant liquid storage section; and control unit that changes motor rotation speed of coolant pump, corresponding to detection result input from coolant liquid detection units20 Fig. 1

3. 发明专利

SG176363A1 LOCAL COOLING UNIT AND COOLING SYSTEM 未知
公开(公告)号：SG176363A1
公开(公告)日：2011-12-29
申请号：SG2011030418
申请日：2011-04-28
申请人： HITACHI PLANT TECHNOLOGIES LTD
发明人： TERUO MIKAMI , TOMOHIRO YOSHIDA , MASAKATSU SENDA , RYOJI SHIMOKAWA , YASUHIRO KASHIRAJIMA
摘要： LOCAL COOLING UNIT AND COOLING SYSTEMThe local cooling unit according to an aspect of the present invention includes ahousing having a cavity formed in the housing, an air inlet port which is provided in a bottom surface of the housing and which takes in exhaust heat air from the electronic device, an evaporator which is provided in the housing and which evaporates a refrigerant by heat exchange with air sucked in from the air inlet port to cool the air, therefrigerant passing through an inside of the evaporator, an air outlet port which is provided in a side surface of the housing and which exhausts the air cooled by the evaporator, and a fan which is provided on a side of the air inlet port or a side of the air outlet port of the housing and which moves the air from the air inlet port to the air outletport.Figure 3

4. 发明专利

SG189655A1 COOLING SYSTEM AND METHOD FOR CONTROLLING COOLING SYSTEM 未知
公开(公告)号：SG189655A1
公开(公告)日：2013-05-31
申请号：SG2012077723
申请日：2012-10-18
申请人： HITACHI PLANT TECHNOLOGIES LTD
发明人： JUNICHI ITO , YASUHIRO KASHIRAJIMA , YASUHIKO INADOMI , TOMOHIRO YOSHIDA
摘要： OF THE DISCLOSUREA cooling system includes an evaporator for evaporating a refrigerant to cool an object to be cooled; a refrigerant-supply-flow-rate regulator for regulating a flow rate of the refrigerant to be supplied to the evaporator; a condenser for condensing the refrigerant by cooling the refrigerant by use of a chilled fluid; and a chilled-fluid-flow-rate regulator for regulating a flow rate of the chilled fluid to be supplied to the condenser, the refrigerant condensed by the condenser being to be pressurized to be supplied to the evaporator. The chilled-fluid-flow-rate regulator regulates a flow rate of the fluid, to be supplied to the evaporator, for a temperature of the refrigerant condensed to come to a predetermined target refrigerant-liquid temperature, and the refrigerant-supply-flow-rate regulator regulates a flow rate of the refrigerant, to be supplied to the evaporator, for a temperature of the object cooled to come to a predetermined target cooling temperature.Fig. 1

5. 发明专利

SG185896A1 COOLING SYSTEM FOR ELECTRONIC EQUIPMENT 未知
公开(公告)号：SG185896A1
公开(公告)日：2012-12-28
申请号：SG2012035200
申请日：2012-05-15
申请人： HITACHI PLANT TECHNOLOGIES LTD
发明人： YASUHIRO KASHIRAJIMA , JUNICHI ITO , YASUHIKO INADOMI , TOMOHIRO YOSHIDA , TERUO MIKAMI
摘要： 33A cooling system for electronic equipment includes an evaporator cooling the electronic equipment, a blower5 making air heated by the electronic equipment flow into the evaporator, and a condenser condensing a refrigerant to be supplied to the evaporator and also includes a refrigerant liquid pipe guiding a liquefied refrigerant from the condenser to a lower part of the evaporator, a10 refrigerant gas pipe guiding the refrigerant whichevaporates by cooling the electronic equipment from an upper part of the evaporator to the condenser, arefrigerant flow rate control valve controlling a flow rate of the refrigerant flowing into the evaporator, a15 temperature sensor detecting a temperature of air obtained after passing through the evaporator, and a controller for control valve controlling the control valve on the basis of a detection value of the temperature sensor.20 Fig. 1

6. 发明专利

SG177113A1 COOLING SYSTEM 未知
公开(公告)号：SG177113A1
公开(公告)日：2012-01-30
申请号：SG2011046646
申请日：2011-06-23
申请人： HITACHI PLANT TECHNOLOGIES LTD
发明人： JUNICHI ITO , YASUHIRO KASHIRAJIMA , YASUHIKO INADOMI , TOMOHIRO YOSHIDA
IPC分类号： F24F11/76
摘要： OF THE DISCLOSURE COOLING SYSTEM5 The present invention provides a cooling system with high energy savingperformance which reduces running cost by controlling an air blow quantity of a coolingapparatus in accordance with a load while preventing a temperature rise of electronic devices in a cooling system including the cooling apparatus which is installed between racks and performs semi-local cooling operation, in a refrigerant natural circulation cycle.10 An intake air temperature sensor 80 is installed on an air intake surface of each of cooling apparatuses 20a and 20b, and a return air temperature sensor 82 is installed on each of exhaust air surfaces, and a temperature difference between an intake air temperature and a return air temperature is calculated by a blower frequency switching device 70 from measured values of the intake air temperature sensor 80 and the return air15 temperature sensor 82. By the blower frequency switching device 70, frequencies of the blowers 22a and 22b are controlled to frequencies corresponding to the temperature difference.Figure 1

7. 发明专利

SG177095A1 REFRIGERANT CIRCULATION APPARATUS 未知
公开(公告)号：SG177095A1
公开(公告)日：2012-01-30
申请号：SG2011043858
申请日：2011-06-15
申请人： HITACHI PLANT TECHNOLOGIES LTD
发明人： YASUHIKO INADOMI , YASUHIRO KASHIRAJIMA , JUNICHI ITO , YASUSHI NISHIDA , TERUO MIKAMI
摘要： OF THE DISCLOSURE REFRIGERANT CIRCULATION APPARATUSA refrigerant circulation apparatus includes: an evaporator which evaporates arefrigerant; a blowing device which blows air to the evaporator; a condenser configured to condense the refrigerant evaporated by the evaporator; a blower failure detecting device which detects failure of the blowing device; a heat medium flow rate control valve which controls a flow rate of a heat medium supplied to the condenser, the heatmedium for cooling the refrigerant; a condenser refrigerant liquid temperature sensor which detects a temperature of the refrigerant which is supplied to the evaporator from the condenser; and condenser side refrigerant temperature control device which lowers a setting temperature of a condenser side externally inputted temperature and controls the heat medium flow rate control valve so that a measured value of the condenserrefrigerant liquid temperature sensor becomes equal to the lowered setting temperature, when receiving a failure signal from the blower failure detecting device.Figure 1

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