Abstract: A cooling system including a vaporizer configured to absorb heat due to a liquid-phase refrigerant being vaporized, a condenser configured to discharge heat due to a refrigerant in a gaseous phase state being liquefied, a resistance body provided in a middle of a pipe passage ranging from the vaporizer to the condenser and applying a resistance to the refrigerant, state detection sensors provided in the pipe passage on an upstream and downstream sides of the resistance body and detecting a state of the refrigerant flowing through each side inside the pipe passage, and a flow rate controller configured to detect droplets in the refrigerant flowing through the pipe passage on the basis of a difference between detection values of the state detection sensors which are detected on the upstream and downstream sides of the resistance body, and controls a flow rate of the refrigerant on the basis of detection results.

Abstract: A valve control device includes a receiving unit, an opening degree control unit, and a fixing control unit. The receiving unit receives information concerning the measured temperature of a fluid to be cooled that is cooled by a vaporizer in a refrigerant circulation path that is equipped with the vaporizer and a condenser. The opening degree control unit variably controls the opening degree of a valve that controls the flow rate of the refrigerant that circulates through the circulation path in accordance with the difference between the measured temperature and a target temperature provided in advance. The fixing control unit fixes the opening degree of the valve with priority over variable control performed by the opening degree control unit in the case where a fixing condition based on the difference between the measured temperature and the target temperature and a valve opening degree variation condition is satisfied.

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 s

Abstract: The present invention provides a heat exchanger including a lower header into which a liquid-phase refrigerant flows, a plurality of heat exchange pipes which branch off from the lower header and extend upwards, and an upper header which is configured to collect refrigerant received by the heat exchange pipes, in which a refrigerant inlet of the lower header is provided with a flow passage resistance adjusting hole having a cross-section smaller than a flow passage cross-section of a pipe passage for supplying the refrigerant.

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 refrig

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.

Abstract: A valve control device comprising a receiving unit, an opening degree control unit, and a fixing control unit. The receiving unit receives information concerning the measured temperature of a fluid to be cooled that is cooled by a vaporizer in a refrigerant circulation path that is equipped with the vaporizer and a condenser. The opening degree control unit variably controls the opening degree of a valve that controls the flow rate of the refrigerant that circulates through the circulation path in accordance with the difference between the measured temperature and a target temperature provided in advance. The fixing control unit fixes the opening degree of the valve with priority over variable control performed by the opening degree control unit in the case where a fixing condition based on the difference between the measured temperature and the target temperature and a valve opening degree variation condition is satisfied.

Abstract: The present invention provides a heat exchanger including a lower header into which a liquid-phase refrigerant flows, a plurality of heat exchange pipes which branch off from the lower header and extend upwards, and an upper header which is configured to collect refrigerant received by the heat exchange pipes, in which a refrigerant inlet of the lower header is provided with a flow passage resistance adjusting hole having a cross-section smaller than a flow passage cross-section of a pipe passage for supplying the refrigerant.

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.

Abstract: With a phase change cooling device, it is difficult to obtain reliable high-efficiency cooling performance due to a change in heat exchange performance.

Abstract: Since improving heat exchange between a gas-phase refrigerant and a liquid-phase refrigerant in a refrigeration system could instead result in a reduction in the efficiency of the whole refrigeration system, a heat exchange device (201) of the present invention includes: a refrigerant supply means (210) for supplying a first-temperature liquid-phase refrigerant (R11) and a second-temperature gas-phase refrigerant (R12) in one circulation system; a plurality of heat exchange means (220A, 220B) which are each configured so as to perform heat exchange between the liquid-phase refrigerant and the gas-phase refrigerant; and refrigerant circulation means (231, 232, 242) for circulating the gas-phase refrigerant (R12) in such a manner that the gas-phase refrigerant (R12) flows in parallel in the plurality of heat exchange means, and circulating the liquid-phase refrigerant (R11) in such a manner that the liquid-phase refrigerant (R11) flows in series in the plurality of heat exchange means.

Abstract: In order to supply a refrigerant to multiple-stage heat receivers equally while saving space, a refrigerant distribution device to distribute a refrigerant supplied from the upper stream according to the present invention includes a main body including a side wall part, an upper face part and a bottom face part, an upstream pipe provided on the upper face part in a manner communicating with an inside of the main body, a downstream pipe provided in a state partially inserted inside the main body via an under face hole part provided in the bottom face part, a tributary pipe provided in the side wall part or the bottom face part in a manner communicating with the inside of the main body, and a refrigerant direction changing means provided between the upstream pipe and the downstream pipe.

Abstract: A vapor pipe 103 connects a heat dissipation portion 200 and each of a plurality of heat receiving portions 102. A liquid pipe 104 connects the heat dissipation portion 200 and each of a plurality of the heat receiving portions 102. A bypass pipe 105 connects the vapor pipe 103 and the liquid pipe 104. A valve 106 opens and closes a flow path of the bypass pipe 105. A first connection portion 107 connects the vapor pipe 103 and the bypass pipe 105. A second connection portion 108 connects the liquid pipe 103 and the bypass pipe 105. The first connection portion 107 is disposed at a position higher than that of the second connection portion 108. As a result, refrigerant can be efficiently transported in a short time.

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.

Abstract: A cooling system employing a phase-change cooling apparatus together with an air conditioner becomes complex and increases in cost if it is configured to maximize the efficiency of the entire cooling system; therefore, a phase-change cooling apparatus according to an exemplary aspect of the present invention includes a heat receiving means for vaporizing refrigerant liquid stored and producing refrigerant vapor by receiving heat exhausted from a heating section having breathed in cold air; a heat radiation means for liquefying the refrigerant vapor and producing refrigerant liquid by radiating heat of the refrigerant vapor to cooling air by a fan; a vapor tube connecting the heat receiving means to the heat radiation means, the refrigerant vapor mainly flowing through the vapor tube; a liquid tube connecting the heat receiving means to the heat radiation means, the refrigerant liquid mainly flowing through the liquid tube; and a control means for controlling a rotation rate of the fan, wherein the control mea

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.

Abstract: An electronic board 200 has a heat generating component 220 mounted on it. An enclosure 300 houses the electronic board 200. A heat transport unit 400 is coupled to the enclosure 300 and transports heat generated by the heat generating component 220 to the outside. A heat receiving unit 510 is provided in a heat transport unit 400, 400A. The heat receiving unit 510 receives heat generated by the heat generating component 220. A heat dissipating unit 530 is provided in the heat transport unit 400 in such a manner that a portion of the heat dissipating unit 530 is exposed to outside air, and is coupled to the heat receiving unit 510. The heat dissipating unit 530 dissipates heat received by the heat receiving unit 510 to the outside. A guide duct unit 340 is formed into a tube interconnecting the heat generating component 220 and the heat receiving unit 510 in order to release heat of the heat generating component 220 to the heat receiving unit 510.

Abstract: It is impossible to avoid the increase in device cost and maintenance cost in order to cool a heat source efficiently using a natural-circulation type phase-change cooling device; therefore, a cooling device according to an exemplary aspect of the present invention includes a heat receiving unit for receiving heat; a condensing unit for releasing heat; and a refrigerant intermediary unit for connecting the heat receiving unit with the condensing unit, and transporting refrigerant circulating between the heat receiving unit and the condensing unit, wherein the refrigerant intermediary unit includes a refrigerant retaining unit for retaining the refrigerant, a primary tube connecting the refrigerant retaining unit with the condensing unit, and a secondary tube connecting the refrigerant retaining unit with the heat receiving unit and including a bendable tube.

Abstract: If a gas-liquid separation structure is introduced into a phase-change cooling device to prevent the cooling performance from decreasing, manufacturing costs increase; therefore, a refrigerant intermediary device according to an exemplary aspect of the present invention includes a refrigerant container configured to contain refrigerant; a first inlet, provided for an outer periphery of the refrigerant container, through which a vapor-phase refrigerant and a first liquid-phase refrigerant flowing in; a first outlet, provided for the outer periphery of the refrigerant container, through which the vapor-phase refrigerant flowing out; a second inlet, provided for the outer periphery of the refrigerant container, through which a second liquid-phase refrigerant flowing in; and a second outlet, provided for the outer periphery of the refrigerant container, through which the first liquid-phase refrigerant and the second liquid-phase refrigerant flowing.

Abstract: In a natural-circulation type phase-change cooling device, the cooling performance is degraded if the number of heat sources to be cooled increases; therefore, a phase-change cooling device according to an exemplary aspect of the present invention includes a plurality of heat receiving units for respectively holding refrigerant receiving heat from a plurality of heat sources; a condensing unit for generating refrigerant liquid by condensing and liquefying refrigerant vapor of the refrigerant evaporated in the heat receiving units; a refrigerant vapor transport structure configured to connect the heat receiving units to the condensing unit and transport the refrigerant vapor; a refrigerant liquid transport structure configured to connect the heat receiving units to the condensing unit and transport the refrigerant liquid; wherein the refrigerant vapor transport structure includes a plurality of sub-vapor-pipes respectively connected to the plurality of heat receiving units, a vapor joining portion connected to