Abstract: A container refrigeration apparatus includes a refrigeration cycle unit having a refrigerant circuit, and a controller configured to control an action of the refrigeration cycle unit to adjust a temperature of inside air in a container to a desired temperature. The controller is configured to include an impact determination section configured to determine whether or not a strong impact acted on the container, and an abnormality diagnosis section configured to perform an abnormality diagnosis to diagnose whether or not at least one of the container or the container refrigeration apparatus has an abnormality when the impact determination section determines that a strong impact acted on the container.

Abstract: A cooling apparatus that cools a cooling target object in a state in which an electromagnetic field or an electric field acts on the cooling target object is provided. The cooling apparatus includes a refrigeration machine to cool a cooling target object, an electromagnetic wave irradiation device to generate an electromagnetic field which acts on the cooling target object, a controller to control operations of the refrigeration machine and the electromagnetic wave irradiation device and perform a subcooling operation of cooling the cooling target object by using the refrigeration machine in a state in which the electromagnetic field is generated, and a temperature sensor to measure a temperature of the cooling target object. In the subcooling operation, the controller controls the intensity of the electromagnetic field generated by the electromagnetic wave irradiation device in accordance with the temperature measured by the temperature sensor.

Abstract: A container refrigeration apparatus includes a refrigeration cycle unit having a refrigerant circuit, and a controller configured to control an action of the refrigeration cycle unit to adjust a temperature of inside air in a container to a desired temperature. The controller is configured to include an impact determination section configured to determine whether or not a strong impact acted on the container, and an abnormality diagnosis section configured to perform an abnormality diagnosis to diagnose whether or not at least one of the container or the container refrigeration apparatus has an abnormality when the impact determination section determines that a strong impact acted on the container.

Abstract: To facilitate replacement or repair of a sensor for refrigerant leakage detection used for a refrigerator for a storage box such as a container in case of breakdown, a sensor for refrigerant leakage detection is disposed outside of an internal space of a storage box, and an internal air guide passage is provided which guides internal air from a discharge side of a fan provided in the internal space of the storage box to the sensor for refrigerant leakage detection.

Abstract: A cooling apparatus that cools a cooling target object while causing the cooling target object generate internal heat by an electromagnetic wave and that is capable of efficiently producing a subcooling state of the cooling target object is provided. The cooling apparatus includes a refrigeration machine which cools the cooling target object, an electromagnetic wave irradiation device which irradiates the cooling target object with an electromagnetic wave so as to cause the internal heat generation in the cooling target object and has a variable frequency of the irradiating electromagnetic wave, and a controller which controls operations of the refrigeration machine and the electromagnetic wave irradiation device and which performs a subcooling operation of cooling the cooling target object using the refrigeration machine while irradiating the cooling target object with an electromagnetic wave.

Abstract: A cooling apparatus that cools a cooling target object in a state in which an electromagnetic field or an electric field acts on the cooling target object and that is capable of efficiently causing a subcooling state of the object is provided. The cooling apparatus includes a refrigeration machine to cool an cooling target object, an electromagnetic wave irradiation device to generate an electromagnetic field which acts on the cooling target object and intensity of which is variable, a controller to control operations of the refrigeration machine and the electromagnetic wave irradiation device and perform a subcooling operation of cooling the cooling target object by using the refrigeration machine in a state in which the electromagnetic field is generated, and a temperature sensor to measure a temperature of the cooling target object.

Abstract: To facilitate replacement or repair of a sensor for refrigerant leakage detection used for a refrigerator for a storage box such as a container in case of breakdown, a sensor for refrigerant leakage detection is disposed outside of an internal space of a storage box, and an internal air guide passage is provided which guides internal air from a discharge side of a fan provided in the internal space of the storage box to the sensor for refrigerant leakage detection.

Abstract: Disclosed is a container refrigeration apparatus including a unit case of an inside air control system disposed outside a container, the unit case housing an air pump therein. The container refrigeration apparatus is provided with an air inlet unit independent of the unit case. The air inlet unit and the air pump are connected together by a tube. The air inlet unit is provided with a membrane filter, and is disposed above the unit case. Malfunctions of electrical components and corrosion on metallic components due to moisture permeation into the unit case are reduced.

Abstract: Disclosed herein is a CA system which allows first and second adsorption columns to alternately perform an adsorption operation and a desorption operation so that nitrogen-enriched air having a higher nitrogen concentration and a lower oxygen concentration than the air is produced and supplied into the container. The CA system executes a second operation mode in which the nitrogen-enriched air produced for a predetermined time since the desorption operation was started is discharged to the outside of the container, and the nitrogen-enriched air produced until the end of the desorption operation since the predetermined time passed is supplied into the container.

Abstract: Disclosed herein is a CA system which allows first and second adsorption columns to alternately perform an adsorption operation and a desorption operation so that nitrogen-enriched air having a higher nitrogen concentration and a lower oxygen concentration than the air is produced and supplied into the container. The CA system executes a second operation mode in which the nitrogen-enriched air produced for a predetermined time since the desorption operation was started is discharged to the outside of the container, and the nitrogen-enriched air produced until the end of the desorption operation since the predetermined time passed is supplied into the container.

Abstract: Disclosed is a container refrigeration apparatus including a unit case of an inside air control system disposed outside a container, the unit case housing an air pump therein. The container refrigeration apparatus is provided with an air inlet unit independent of the unit case. The air inlet unit and the air pump are connected together by a tube. The air inlet unit is provided with a membrane filter, and is disposed above the unit case. Malfunctions of electrical components and corrosion on metallic components due to moisture permeation into the unit case are reduced.

Abstract: A refrigeration facility such as a refrigeration container includes a refrigeration device cooling an interior of the refrigeration facility and including an evaporator allowing air inside the refrigeration facility to pass through. A condensate port serving as a corrosive gas detector is installed in a drain hose. The drain hose disposes condensate water from a drain pan, which collects condensate water generated by the evaporator. Detecting corrosive gas in the air inside the container by using a pH sensor to examine a pH value of condensate water in the drain port allows for reducing the risk of corrosion of components installed inside the container.

Abstract: A method for detecting whether a different refrigerant has been charged into a refrigeration apparatus including a refrigerant circuit includes: a charging step of charging a refrigerant into the refrigerant circuit; a characteristics determination step of determining whether saturation temperature characteristics of the refrigerant charged in the charging step are identical to saturation temperature characteristics of a previously determined normal refrigerant, the saturation temperature characteristics of the refrigerant being derived from a pressure and a temperature of the refrigerant; and an alerting step of, when, in the characteristics determination step, a determination is made that the saturation temperature characteristics of the charged refrigerant are different from those of the normal refrigerant, issuing an alarm indicating that the charged refrigerant is different from the normal refrigerant.

Abstract: A method is disclosed that makes it possible to reduce the amount of refrigerant used and shorten the amount of time over which the new air conditioner must be run in a refrigerant pipe washing mode when an air conditioner that used a mineral-oil-based refrigerant oil is updated to or replaced with an air conditioner using an HFC refrigerant as the working refrigerant and the existing refrigerant piping is reused as is. Thus, the existing refrigerant piping of the air conditioner that used a mineral-oil-based refrigerant oil is reused in the air conditioner that uses an HFC refrigerant as the working refrigerant, the by washing the refrigerant piping using a cleaning agent comprising an HFC refrigerant containing at least 40 wt % of R32 to remove residual refrigerant oil in the refrigerant piping.

Abstract: An outdoor unit (20) including a compressor (21) and an outdoor heat exchanger (22) and an indoor unit (30) including an indoor heat exchanger (31) are provided. The outdoor unit (20) and the indoor unit (30) constitute a main circuit (43) of a refrigerant circuit (40). A sub-circuit (70) whose one end is connected to a liquid line (4a) of the main circuit (43) and another end is connected to a low-pressure gas line (4b) of the main circuit (43), and which stores refrigerant in the main circuit (43) is also provided. The sub-circuit (70) is located on a sub-passageway (71), and includes: a refrigerant regulator (72) for storing refrigerant in the main circuit (43); and a switch mechanism (73) for establishing and blocking communication between the refrigerant regulator (72) and each of the liquid line (4a) and the low-pressure gas line (4b). When the amount of refrigerant in the main circuit (43) is excessive, redundant refrigerant in the main circuit (43) is stored in the refrigerant regulator (72).

Abstract: A heat pump type hot-water supply device including a hot water storage tank and a hot water circulation circuit is provided with a bactericidal component generator, such as a discharge device for generating a streamer discharge, in order to prevent development of bacteria, such as Legionella, at low cost. The bactericidal component generator generates, at a temperature lower than or equal to that of hot water in a hot water circulation circuit, a bactericidal component so as to bring about an effect on the hot water.

Abstract: An air conditioner is configured by appropriating existing refrigerant pipes of an existing air conditioner to update indoor units and an outdoor unit of a refrigerant circuit of the existing air conditioner. The air conditioner is disposed with an updated refrigerant circuit and a mixer disposed in the updated refrigerant circuit. The updated refrigerant circuit is filled with working refrigerant and refrigerating machine oil that include an acid trapping agent that detoxifies acid components remaining in the refrigerant pipes. The mixer mixes the acid components with the acid trapping agent during refrigeration cycle operation of the updated refrigerant circuit.

Abstract: An air conditioner has a heat source unit with a compressor and a heat source heat exchanger and utilization units with utilization expansion valves and utilization heat exchangers. The heat source unit and the utilization unit are interconnected via refrigerant communication pipes. The air conditioner is capable of switching and operating between a normal operation mode in which control of the respective devices is performed depending on the operation loads of the utilization units and a refrigerant quantity judging operation mode in which the utilization units perform cooling operation. The utilization expansion valves are controlled such that degrees of superheating at outlets of the utilization heat exchangers become a positive value, and an operation capacity of the compressor is controlled such that evaporation pressures in the utilization heat exchangers become constant.

Abstract: An outdoor unit (20) including a compressor (21) and an outdoor heat exchanger (22) and an indoor unit (30) including an indoor heat exchanger (31) are provided. The outdoor unit (20) and the indoor unit (30) constitute a main circuit (43) of a refrigerant circuit (40). A sub-circuit (70) whose one end is connected to a liquid line (4a) of the main circuit (43) and another end is connected to a low-pressure gas line (4b) of the main circuit (43), and which stores refrigerant in the main circuit (43) is also provided. The sub-circuit (70) is located on a sub-passageway (71), and includes: a refrigerant regulator (72) for storing refrigerant in the main circuit (43); and a switch mechanism (73) for establishing and blocking communication between the refrigerant regulator (72) and each of the liquid line (4a) and the low-pressure gas line (4b). When the amount of refrigerant in the main circuit (43) is excessive, redundant refrigerant in the main circuit (43) is stored in the refrigerant regulator (72).

Abstract: An air conditioner includes a main refrigerant circuit and a liquid level detection circuit. The main refrigerant circuit includes a compressor that compresses gas refrigerant, a heat source side heat exchanger, a receiver that stores liquid refrigerant, and user side heat exchangers. The liquid level detection circuit is arranged so as to be capable of drawing out a portion of the refrigerant in the receiver from a first predetermined position of the receiver, reducing the pressure of the refrigerant and heating it, measuring the temperature of the refrigerant, and then returning the refrigerant to the intake side of the compressor, in order to detect whether the liquid level in the receiver is at the first predetermined position.