Hitachi-johnson Controls Air Conditioning, Inc.

Johnson Controls-hitachi Air Conditioning Technology (hong Kong) Limited

Atsuhiko Yokozeki

Hiroaki Tsuboe

Yoshiharu Tsukada

Koji Naito

Yuki Arai

Susumu Nakayama

Hiroaki Kaneko

Kazuhiko Tani

Kazuhito Sekiba

Shuuhei Tada

Shunji Sasaki

Jun Xue

Yoshiyuki Yamanashi

Shoutaro Yamamoto

Hiroyasu Yoneyama

Hideyuki Ueda

Masaki Uno

Yutaro Miyata

Masahiro Nishide

An air-conditioner which performs an appropriate control in the event of a leak of refrigerant. The air-conditioner includes a refrigerant circuit, a refrigerant leak sensor which senses a leak of refrigerant in the refrigerant circuit, an indoor fan which delivers air to the indoor heat exchanger, and an indoor control circuit which, upon sensing a leak of refrigerant by the refrigerant leak sensor, controls the indoor fan based on whether the refrigerant sealed in the refrigerant circuit is flammable.

Air-conditioner

To achieve higher efficiency at a low-load region and to enable power saving throughout a year. The refrigeration cycle apparatusincludes a compressorthat has a flow in/out portthrough which a refrigerant is capable of flowing out and flowing in, in fluid communication with a compression room; pipesdisposed at a suction side of the compressor; a pipeconnected to the flow in/out portof the compressor; a pipethat has one end connected to the pipeand an opposite end connected to the pipe; and a second solenoid valvefor opening and closing a fluid passage of the pipe

Refrigeration cycle apparatus

There are provided a heat exchange apparatus and an air conditioner in which an occurrence of uneven refrigerant distribution of a heat exchanger is reduced such that heat exchange performance improves. The heat exchange apparatus includes: a heat-transfer pipe through which a refrigerant flows; a heat exchanger in which a plurality of the heat-transfer pipes are connected to one another; a distributor that distributes the refrigerant to the plurality of heat-transfer pipes; an inflow pipe that causes the refrigerant to flow into the distributor; and a confluent pipe which is connected to an intermediate position of the inflow pipe and in which the refrigerant flowing through an inside thereof is to merge with the refrigerant flowing through an inside of the inflow pipe. A merging part between the inflow pipe and the confluent pipe is positioned in the vicinity of the distributor.

Heat exchange apparatus and air conditioner using same

An air conditioner including an outdoor device that includes a bypass path connecting a discharge side of the compressor and a suction side of the compressor, an on-off valve configured to open/close the bypass path, and a control device configured to control the compressor, the decompression device, and the on-off valve. The control device opens the on-off valve in a state in which the compressor is stopped to execute such bypass opening that refrigerant circulates, through the bypass path, from the discharge side of the compressor in a refrigerant storage state in which refrigerant is stored to the suction side of the compressor in a substantially vacuum state, and evaluates a volume of the pipe.

Air conditioner having compressor bypass and evaluation of volume of connecting pipe

A heat exchanger includes a refrigerant flow path into which a gas refrigerant flows from two gas-side inlets in the second row, that are positioned off from each other. Refrigerant flow paths from the two gas-side inlets converge in the one end portion. The refrigerant flow path connects to a heat-transfer pipe in the first row from the second row. The refrigerant flow path includes a refrigerant flow path which is formed in a range from the same stage as one of the gas-side inlets of the second row to the same stage as the other of the gas-side inlets of the second row, while being arranged along both ways between the one end portion and the other end portion in the first row, and the refrigerant flow path extends to a liquid-side outlet.

Air-conditioning device

An air conditioner which includes a compressor, an outdoor heat exchanger, an outdoor expansion valve, and an indoor heat exchanger that have been successively connected by a pipeline, and in which a hydrofluoroolefin-containing refrigerant is to be used, the air conditioner being characterized in that an oxygen adsorption device in which a synthetic zeolite is used as an adsorbent has been disposed somewhere in the pipeline, the synthetic zeolite having a pore diameter which is larger than the size of the oxygen molecule but smaller than the size of the hydrofluoroolefin molecule.

Refrigeration cycle device

It is an object to obtain an air conditioner capable of suppressing rise of compressor discharge temperature and individually controlling cooling capacity of a plurality of respective indoor units. For this purpose, the air conditioner is a multi-room air conditioner, in which a refrigeration cycle is formed by connecting an outdoor unithaving an outdoor heat exchanger to the plurality of indoor unitsandhaving indoor heat exchangersandand indoor expansion mechanismsandusing a liquid pipeand a gas pipe. Further, as refrigerant circulating through the refrigeration cycle, R32 or mixed refrigerant containing 70 mass % or higher percent of R32 is used. Further, a temperature difference detection device to detect an air temperature difference between inlet-side air and outlet-side air in the respective indoor heat exchangers of the respective indoor units is provided. The cooling capacity in the respective indoor units is controlled by regulating the indoor expansion mechanisms of the respective indoor units based on the air temperature difference in the indoor units detected with the temperature difference detection device.

Air conditioner

An object is to prevent performance deterioration by a refrigerant having a low global warming potential (GWP) and to decrease the diameter of a connection pipe. A refrigerating cycle device includes a compressor, a heat source-side heat exchanger, a first expansion device, a liquid-side connection pipe, a second expansion device, a user-side heat exchanger, and a gas-side connection pipesequentially connected. In addition, a refrigerating cycle uses a refrigerant of R32. The outer diameters of the liquid-side connection pipe and the gas-side connection pipe are set to '(D&#x2212;1)/8 inch' (wherein 'D/8 inch' is the outer diameter of a connection pipe in the use of a refrigerant of R410A). The liquid-side connection pipe has a range of the Dgiven &#x201c;2&#x2264;D&#x2264;4&#x201d; and the gas-side connection pipe has a range of the Dgiven &#x201c;3&#x2264;D&#x2264;8&#x201d;.

Refrigerating cycle device

Heat transfer pipesandextend from the other end sectionB to one end sectionA in an intermediate row Land combine in the one end sectionA to be heat transfer pipesand. The heat transfer pipesandare configured to extend back and force once between the one end sectionA and the other end sectionB in a upstream row L. Heat transfer pipesandextend from the other end sectionB to the one end sectionA in the intermediate row Land combine in the one end sectionA to be heat transfer pipesand. The heat transfer pipesandare configured to extend back and force once between the one end sectionA and the other end sectionB in the upstream row L. The heat transfer pipeextending from the other end sectionB to the one end sectionA and the heat transfer pipefrom the other end sectionB to the one end sectionA are arranged to be adjacent to each other.

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Tokyo, Japan

Atsuhiko Yokozeki