Daikin Industries, Ltd.

Osaka University

Tatsuya Takakuwa

Kazuhiro Takahashi

Daisuke Karube

Shun Ohkubo

Mitsushi Itano

Yuzo Komatsu

Yuuki Yotsumoto

Eiji Kumakura

Atsushi Yoshimi

Takuro Yamada

Ikuhiro Iwata

Takehiro Chaki

Tetsushi Tsuda

Osamu Yamamoto

Hideki Nakaya

Takeo Abe

Yuuko Ohhigashi

Yumi Toda

Yuuta Hasumoto

Kei Kuramoto

Tatsumi Tsuchiya

Yasufu Yamada

Masaru Tanaka

Hitomi Kuroki

Kazunori Morimoto

Kenji Gobou

Tomoyuki Gotou

Akihito Mizuno

Katsuki Fujiwara

Motohisa Shino

Keiichirou Watanabe

Yuuichi Yanagi

Atsushi Okamoto

Yoshinari Asano

Kazuhiro Furusho

Keiji Aota

Akihiro Oshima

Masanori Ukibune

Masayuki Kishimoto

Kazuyuki Satou

Masao Noumi

Mana Shimokawa

Masanobu Nishitsuji

Keisuke Ohtsuka

Shuuzou Kida

Yoshikazu Nakao

Kohei Yamanoi

Shinichi Fujinaka

An object of the present invention is to provide a method that can efficiently remove water contained in pentafluoropropane. Provided as a solution is a method comprising distilling a composition comprising pentafluoropropane and water to thereby extract pentafluoropropane with a water content higher than that of the composition as a first stream, and pentafluoropropane with a water content lower than that of the composition as a second stream.

Azeotrope or azeotropic composition containing pentafluoropropane and water, and method for producing pentafluoropropane

This disclosure provides a method for producing a hydrofluoroolefin (HFO) or fluoroolefin (FO), which is a target compound, with high selectivity, without requiring a high temperature and a catalyst in a synthesis process of the target compound. Specifically, the present disclosure provides a method for producing a hydrofluoroolefin or fluoroolefin having two, three, or four carbon atoms, comprising irradiating at least one starting material compound selected from the group consisting of hydrofluorocarbons having one or two carbon atoms and hydrofluoroolefin As having two or three carbon atoms with ionizing radiation and/or an ultraviolet ray having a wavelength of 300 nm or less, with the proviso that when the at least one starting material compound is the hydrofluoroolefin A, the resulting hydrofluoroolefin is different from the hydrofluoroolefin A.

Manufacturing method for hydrofluoroolefin or fluoroolefin

A warm-water generating apparatus () uses, as a refrigerant, a mixed refrigerant containing at least 1,2-difluoroethylene (HFO-1132(E)). The warm-water generating apparatus () includes a compressor (), a heat-source-side air heat exchanger (), an expansion valve (), and a use-side water heat exchanger (). The water heat exchanger () causes the mixed refrigerant flowing therein and first water to exchange heat with each other to heat the first water.

Warm-water generating apparatus

No studies have been made regarding what kinds of refrigerants should be used in a refrigeration cycle device for a vehicle. An air conditioner () for a vehicle includes a refrigerant circuit () and a refrigerant that is sealed in the refrigerant circuit (). The refrigerant circuit () includes a compressor (), a first heat exchanger (), which serves as a heat dissipater in a dehumidifying heating mode, an outside-air heat exchanger (), a cooling control valve (), and a second heat exchanger (), which serves as an evaporator in the dehumidifying heating mode. The refrigerant is a refrigerant having a low GWP.

Refrigeration cycle device for vehicle

A showcase includes a refrigerant circuit and a refrigerant enclosed in the refrigerant circuit. The refrigerant circuit includes a compressor (), a radiator (), an expansion valve (), and an evaporator (). The refrigerant is a low-GWP refrigerant.

Refrigerant cycle apparatus

A two-stage refrigeration apparatus () includes a first cycle () and a second cycle (). The first cycle () includes a first compressor (), a first condenser (), a first expansion mechanism (), and a first evaporator () that are arranged in such a manner as to be connected to the first cycle. A first refrigerant circulates through the first cycle. The second cycle () includes a second downstream-side condenser () and a second evaporator () that are arranged in such a manner as to be connected to the second cycle. A second refrigerant circulates through the second cycle. The first evaporator () and the second downstream-side condenser () constitute a cascade condenser (). In the cascade condenser (), heat is exchanged between the first refrigerant and the second refrigerant. At least one of the first refrigerant and the second refrigerant is a refrigerant mixture containing at least 1,2-difluoroethylene (HFO-1132(E)).

Refrigeration apparatus

A refrigeration cycle apparatus () includes a refrigerant circuit () including a compressor (), a heat source-side heat exchanger (), an expansion mechanism (), and a usage-side heat exchanger (). In the refrigerant circuit (), a refrigerant containing at least 1,2-difluoroethylene (HFO-1132 (E)) is sealed. At least during a predetermined operation, in at least one of the heat source-side heat exchanger () and the usage-side heat exchanger (), a flow of the refrigerant and a flow of a heating medium that exchanges heating with the refrigerant are counter flows.

Refrigeration cycle apparatus

A heat exchange unit is provided with which, even if a flammable refrigerant is used, the likelihood of the refrigerant reaching an electric component unit is reduced. An outdoor unit () constitutes a portion of an air-conditioning apparatus (), and is connected to an indoor unit () via a liquid-side refrigerant connection pipe () and a gas-side refrigerant connection pipe (). The outdoor unit () includes an outdoor housing (), an outdoor heat exchanger () disposed inside the outdoor housing () and in which a refrigerant flows, a liquid-side shutoff valve () connected to the liquid-side refrigerant connection pipe (), a gas-side shutoff valve () connected to the gas-side refrigerant connection pipe (), and an outdoor electric component unit () disposed inside the outdoor housing (). The refrigerant is a flammable refrigerant containing at least 1,2-difluoroethylene. When the outdoor unit () is in its installed state, the lower end of the outdoor electric component unit () is positioned above the liquid-side shutoff valve () and the gas-side shutoff valve ().

Heat exchange unit

Provided is a method for obtaining HFO-1132(E) and/or HFO-1132(Z) efficiently. The method is a method for producing HFO-1132(E) and/or HFO-1132(Z), comprising supplying a composition containing HFO-1132(E) and/or HFO-1132(Z) to a reactor, and performing an isomerization reaction between HFO-1132(E) and HFO-1132(Z).

Isomerization of 1,2-difluoroethylene

A refrigeration cycle apparatus () is capable of performing a refrigeration cycle using a small-GWP refrigerant. The refrigeration cycle apparatus () includes a refrigerant circuit () and a refrigerant enclosed in the refrigerant circuit (). The refrigerant circuit includes a compressor (), a condenser (), a decompressing section (), and an evaporator (). The refrigerant contains at least 1,2-difluoroethylene.

An air conditioning unit capable of performing a refrigeration cycle using a small-GWP refrigerant is provided. A refrigeration cycle apparatus (to) includes a refrigerant circuit () including a compressor (), a condenser (), a decompressing section (), and an evaporator (), and a refrigerant containing at least 1,2-difluoroethylene enclosed in the refrigerant circuit ().

An air-conditioning unit that is able to suppress ignition at an electric heater even when leakage of refrigerant occurs while a low-GWP refrigerant is used is provided. In an outdoor unit () including a casing (), a compressor () provided inside the casing () and configured to compress refrigerant containing 1,2-difluoroethylene, and a drain pan heater () provided inside the casing (), an electric power consumption of the drain pan heater () is lower than or equal to 300 W.

Air-conditioning unit

The present disclosure provides a method for producing a reaction gas containing R-1132(E) with selectivity higher than that of known methods. Specifically, the present disclosure provides a method for producing a reaction gas containing (E)-1,2-difluoroethylene (R-1132(E)), (1) the method comprising a step of subjecting a starting material gas containing one or more fluoromethanes selected from the group consisting of chlorodifluoromethane (R-22), difluoromethane (R-32), and fluoromethane (R-41) to a reaction that involves thermal decomposition to obtain the reaction gas, and (2) the starting material gas having a water vapor content of 1 volume % or less.

Method for producing reaction gas containing (E)-1,2-difluoroethylene

An air conditioning apparatusincludes a compressor (), an indoor heat exchanger () that is a use-side heat exchanger that exchanges heat with first air (F), an outdoor heat exchanger () that is a heat-source-side heat exchanger that exchanges heat with second air, a refrigerant, a first duct (), and a casing (). The refrigerant contains at least 1,2-difluoroethylene, and circulates in the compressor (), the indoor heat exchanger (), and the outdoor heat exchanger () to repeat a refrigeration cycle. The first duct () supplies the first air (F) to a plurality of rooms in an interior. The casing () includes a use-side space (SP) that is connected to the first duct () and that accommodates the indoor heat exchanger (). The casing () is configured to allow the first air (F) after heat exchange with the refrigerant at the indoor heat exchanger () to be sent out to the first duct ().

Air conditioning apparatus

Growing community of inventors

Osaka, Japan

Tatsuya Takakuwa