Daikin Industries, Ltd.

Kazuhide Mizutani

Hiromune Matsuoka

Manabu Yoshimi

Atsushi Yoshimi

Shinya Matsuoka

Makoto Ikemiya

Noritaka Kamei

Yoshikazu Uehara

Norio Iga

Osamu Tanaka

Nobuki Matsui

Kenji Sato

Satoshi Kawano

Junichi Shimoda

Masahiro Oka

Akitoshi Ueno

Naohiro Tanaka

Kouji Yamamoto

Haruo Nakata

Yasushi Hori

Akiharu Kojima

Hisaaki Takaoka

Kazuma Yokohara

Tadashi Sao

Makio Takeuchi

Ryozo Inada

Toru Inazuka

Chiharu Tomita

Takashi Matsuzaki

Toshiro Ino

Tetsuro Takamizo

Satoru Okura

Hiromume Matsuoka

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.

Container refrigeration apparatus with impact event assessment and abnormality diagnosis

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.

Cooling apparatus

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.

Refrigerator

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.

Freezer device for containers

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.

Indoor air conditioning device and container freezer device comprising same

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.

Refrigerant pipe washing method, air conditioner updating method, and air conditioner

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

Heat source unit and refrigeration system

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.

Air conditioner, heat source unit, and air conditioner updating method

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.

Air conditioner with refrigerant quantity judging mode

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.

Refrigeration device and method for detecting refrigerant amount of refrigeration device

In a refrigeration device including a refrigeration circuit having a compressor and a receiver, the present invention will improve the ability of a liquid level detection circuit to accurately determine whether or not liquid refrigerant is stored up to a predetermined position of the receiver. 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.

A refrigeration device is provided that has a compressor, a heat source side heat exchanger, and a user side heat exchanger. The refrigeration device also has a condenser arranged between the compressor and the user side heat exchanger. The condenser is arranged to condense a portion of the refrigerant that is compressed in the compressor and that is sent to the user side heat exchanger.

Refrigeration device

Disclosed is a drain water discharge structure for an air conditioning apparatus in which at least any one of an internal drain pipe () and an external drain pipe () is formed from an antibacterial metal pipe, thereby to inhibit the generation of slime in the external drain pipe () and to make the external drain pipe () less apt to deterioration.

Drain water discharge structure for air conditioner

An air conditioning device has a heat source unit and a utilization unit connected via a refrigerant connection pipe to form a refrigerant circuit, and has a cooler, a secondary receiver, and a separation membrane device. The cooler cools at least a portion of the refrigerant that flows through the liquid-side refrigerant circuit as the compressor is operated and the refrigerant in the refrigerant circuit is recirculated. The secondary receiver separates the refrigerant cooled by the cooler into a liquid refrigerant and a gas refrigerant that includes non-condensable gas. The separation membrane device has a separation membrane for separating the non-condensable gas from the gas refrigerant obtained by gas-liquid separation, and discharges the non-condensable gas thus separated to the outside of the refrigerant circuit.

Method for installing refrigeration device, and refrigeration device

The capacity of a compressor () in cleaning operation is set based on a Froude number Fr. The Froude number Fr expresses a ratio of an inertial force of a gas refrigerant flowing through a gas side communication pipe () to a gravity working on a liquid in the gas side communication pipe (). The capacity of the compressor () in the cleaning operation is set so that the Froude number Fr is larger than 1, whereby the inertial force of the gas refrigerant flowing through the gas side communication pipe () becomes larger than the gravity working on the liquid in the gas side communication pipe () which contains mineral oil and foreign matters. In this connection, the liquid containing the mineral oil and the foreign matters is pushed up by the gas refrigerant even in a perpendicularly extending portion of the gas side communication pipe (). Thus, the mineral oil and the foreign matters remaining in the existing liquid side communication pipe () and the existing gas side communication pipe () are recovered.

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Sakai, Japan

Kazuhide Mizutani