Abstract: A skeleton detection system includes, a first storage unit configured to store reference operation information related to at least one cycle of a reference operation being a repetitive operation performed by an operator, a skeleton information detection unit configured to detect skeleton information about the operator from a working video obtained by capturing the operator during work, and a target identification unit configured to identify, as a target, among pieces of skeleton information about a plurality of operators during work, detected by the skeleton information detection unit, skeleton information about an operator indicating an operation satisfying a target requirement that a difference between the reference operation information and inspection target information being operation information during work falls within a preset allowable operation range.

Abstract: A cooling system includes; an evaporator evaporating a refrigerant by heat exchange with room air; a water-cooled condenser being arranged above the evaporator and condensing the refrigerant by heat exchange with cold water; a cold-water flow control valve controlling the flow rate of the cold water supplied to the water-cooled condenser; a refrigerant cooling tower being arranged above the evaporator and condensing the refrigerant by heat exchange with outside air; a blower being arranged at the refrigerant cooling tower and blowing the outside air; a refrigerant-temperature detector detecting the temperature of the refrigerant condensed by the water-cooled condenser and/or the refrigerant cooling tower; and a controller changing at least one of the opening in the cold-water flow control valve and the rotational speed of a motor in the blower according to the temperature.

Abstract: A 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.

Abstract: A cooling system includes; an evaporator evaporating a refrigerant by heat exchange with room air; a water-cooled condenser being arranged above the evaporator and condensing the refrigerant by heat exchange with cold water; a cold-water flow control valve controlling the flow rate of the cold water supplied to the water-cooled condenser; a refrigerant cooling tower being arranged above the evaporator and condensing the refrigerant by heat exchange with outside air; a blower being arranged at the refrigerant cooling tower and blowing the outside air; a refrigerant-temperature detector detecting the temperature of the refrigerant condensed by the water-cooled condenser and/or the refrigerant cooling tower; and a controller changing at least one of the opening in the cold-water flow control valve and the rotational speed of a motor in the blower according to the temperature.

Abstract: An air conditioning system for appropriately controlling the air conditioning capacity by preventing occurrence of cavitation of a refrigerant pump and a method of operating the system are provided.

Abstract: A cooling system for electronic equipment includes an evaporator cooling the electronic equipment, a blower 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, a refrigerant gas pipe guiding the refrigerant which evaporates by cooling the electronic equipment from an upper part of the evaporator to the condenser, a refrigerant flow rate control valve controlling a flow rate of the refrigerant flowing into the evaporator, a 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.

Abstract: A cooling system comprising an intake air temperature sensor which measures an intake air temperature to an evaporator by a blower; a return air temperature sensor which measures a return air temperature which is cooled in the evaporator; and a blower frequency switching device which switches a frequency of the blower, wherein the blower frequency switching device controls the frequency of the blower to a frequency of the blower corresponding to a difference between an intake air temperature which is measured by an intake air temperature sensor and a return air temperature which is measured by a return air temperature sensor.

Abstract: A refrigerant circulation apparatus includes: an evaporator which evaporates a refrigerant; 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 heat medium 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 condenser refrigerant liquid temperature sensor becomes equal to the lowered setting temperature, when receiving a failure signal from the blower failure detecting device.

Abstract: A cooling method for an electronic device, comprising: naturally circulating a refrigerant between: an evaporator which vaporizes the refrigerant by heat exchange with exhaust hot air from the electronic device, and cools the exhaust hot air; and one of a cooling tower and a condenser which is placed at a position higher than the evaporator, and liquefies the vaporized refrigerant; and valve-controlling a flow rate of a refrigerant liquid to be supplied to the evaporator so that an air temperature after heat has been exchanged for cooling by the evaporator becomes a temperature suited to an operating environment of the electronic device, wherein one of a condensation temperature and a condensation pressure of a refrigerant gas in one of the cooling tower and the condenser do not fluctuate even when the flow rate of the refrigerant liquid to be supplied to the evaporator is valve-controlled.

Abstract: A cooling method of an electronic device, the cooling method naturally circulating a cooling medium between an evaporator, which gasifies the cooling medium and cools heat-discharging air from the electronic device by heat exchange with the heat-discharging air, and a cooling tower or a condenser, which is disposed at a higher position than the evaporator and liquefies the gasified cooling medium, and subjecting a flow rate of the cooling-medium liquid supplied to the evaporator to valve control so that a temperature of the air obtained after the heat exchange and the cooling by the evaporator becomes a temperature suitable for an operating environment of the electronic device, wherein the improvement comprises that a condensation temperature or a condensation pressure of the cooling-medium gas in the cooling tower or the condenser is configured to be not varied even when the flow rate of the cooling-medium liquid supplied to the evaporator is subjected to the valve control.