Mitsubishi Electric Corporation

Sony Corporation

Hitachi, Ltd.

The University of Tokyo

Kabushiki Kaisha Toshiba

Mitsubishi Denki Kabushiki Kaisha

Other

Mitsubishi Heavy Industries Limited

Asahi Glass Company, Limited

University of Illinois

Mitsubishi Jukogyo Kabushiki Kaisha

Tokico, Ltd.

Toshiba Energy Systems & Solutions Corporation

The Tokyo Electric Power Company, Incorporated

Agc Inc.

Akira Ishibashi

Shinya Higashiiue

Daisuke Ito

Takashi Okazaki

Shin Nakamura

Takuya Matsuda

Shigeyoshi Matsui

Yuki Ugajin

Tsuyoshi Maeda

Atsushi Mochizuki

Sangmu Lee

Yoshifumi Mori

Kazushi Nakano

Norikazu Nakayama

Satoshi Ito

Atsushi Toda

Masakazu Ukita

Hiroyuki Okuyama

Takumi Nishiyama

Ryuichi Nagata

Ryota Akaiwa

Eiji Hihara

Chaobin Dang

Jiyang Li

Masaharu Nagai

Tomonori Hino

Hideaki Maeyama

Satoshi Ueyama

Eisaku Kato

Satoru Kijima

Hirotaka Akao

Tsubasa Tanda

Kenji Funato

Ryuichi Ugajin

Shigetaka Tomiya

Etsuo Morita

Kunihiko Kaga

Akira Yatsuyanagi

Kenji Nandoh

Motonobu Hattori

Hiroshi Yoshida

Hiroshi Fujii

Shinichi Wakamoto

Eriko Matsui

Masao Ikeda

Satoshi Taniguchi

Yohei Kato

Tadashi Saito

Hiroki Murakami

Susumu Yoshimura

Hiroki Okazawa

Satoshi Matsumoto

Katsuhiro Akimoto

Shinji Nakadeguchi

Futoshi Hiei

Hiroyasu Noguchi

Yuta Komiya

Takashi Matsumoto

Takashi Kobayashi

Mamoru Suzuki

Kenji Kondo

Hiroshi Masuda

Masahiko Sato

Tadashi Yamamoto

Masashi Takeda

Masahiko Takagi

Yoji Onaka

Junichi Ono

Shoji Yamada

Satoshi Ibori

Yoshihiko Kuroki

Nobuyoshi Mutoh

Makoto Kobayashi

Shunichi Hayashi

Satoshi Kawamura

Keijiro Sakai

Takayuki Kawasumi

Tomohiko Takahashi

Seiji Hata

Keisuke Hokazono

Toyoharu Ohata

Kazumasa Mihara

Akiteru Ueda

Masayuki Nakagawa

Tomoyuki Hayashi

Norihiro Yoneda

Shuji Soga

Toshiyuki Haruna

Tetsuo Kusuzaki

Shoji Kanamaru

Shyoichi Miyazawa

Makoto Honma

Shunji Imanaga

Masamichi Ogawa

Norikazu Takayama

Shintaro Hirata

Takafumi Maeda

Atsushi Morita

A power system stabilizing system includes an accident detector, a power restriction target selector, a cutoff controller, and a reconnection controller. The accident detector is configured to detect a system accident of a power system. The power restriction target selector is configured to select power restriction targets which are required for stability maintenance of the power system out of a plurality of power supplies included in the power system or connected to the power system according to a type of the system accident detected by the accident detector. The cutoff controller is configured to cut off the power restriction targets selected by the power restriction target selector. A system restoration checker is configured to check that the power system has been restored from the system accident on the basis of system information of the power system. The reconnection controller is configured to reconnect some or all of the power restriction targets cut off by the cutoff controller when the system restoration checker checks that the power system has been restored from the system accident.

Power system stabilizing system

In a heat exchanger, an outer diameter of a plurality of heat transfer pipes is defined as Do, a wall thickness is defined as tP, an area represented by a numerical expression of a row pitch L×a step pitch Lis defined as A, and an area represented by a numerical expression of ((Do−2×tP)/2)×π is defined as B, a relation of Do<5.5 mm, a relation of (0.2076×tP−0.1480×tP+0.0545)×Do{circumflex over ( )}(−0.0021×tP−0.0528×tP+0.0164)≤B/A≤(0.0219×tP−0.0185×tP+0.0043)×ln (Do)+(1.6950×tP+1.8455×tP+1.5416), and a relation of B/A<0.0076×tP−0.0417×tP+0.0574 are satisfied.

Heat exchanger and refrigeration cycle apparatus

Provided is a heat exchanger, including a plurality of heat exchange members arranged in a first direction so as to be spaced apart from each other. Each of the plurality of heat exchange members includes: a heat transfer pipe extending in a second direction intersecting with the first direction; and a heat transfer plate provided to the heat transfer pipe along the second direction. The heat transfer plate includes extending portions extending away from the heat transfer pipe in a third direction intersecting with each of the first direction and the second direction. The heat transfer plate is formed separately from the heat transfer pipe.

In a heat exchanger, each of a plurality of heat exchange members includes: a flat pipe; and a heat transfer plate integrated with the flat pipe along a longitudinal direction of the flat pipe. A width direction of each of the flat pipes intersects with a direction in which the plurality of heat exchange members are arranged side by side. Each of the heat transfer plates includes an extending portion extending outward in the width direction of each of the flat pipes from at least one of one end of a corresponding one of the flat pipes in the width direction and another end of the corresponding one of the flat pipes in the width direction. Each of the flat pipes has one or more flat pipe bent portions, each forming a groove extending along the longitudinal direction of the flat pipes.

A heat exchanger, a heat exchanger unit, and a refrigeration cycle apparatus in which frost melt water is inhibited from reaching an upper surface of a header include: heat transfer tubes arranged in parallel with each other; a fin connected to one of the heat transfer tubes; and a header connected to the heat transfer tubes and having a header end surface along a direction in which the heat transfer tubes are arranged in parallel. The fin has an edge facing the header and extends in a first direction perpendicular to the axes of the heat transfer tubes. An end portion of the fin projects in the first direction relative to the header end surface, and another end portion of the fin in the first direction is positioned closer in the first direction to the heat transfer tubes than the header end surface is.

Heat exchanger, heat exchanger unit, and refrigeration cycle apparatus

Provided is a refrigerant distributor including: a first space forming portion having a first refrigerant port and a second refrigerant port; and a second space forming portion, which extends laterally from a lower part of the first space forming portion, and has a plurality of heat transfer pipe connecting portions. A gas-liquid refrigerant mixture flows into the first space forming portion through the first refrigerant port. Heat transfer pipes are connected at positions of the plurality of heat transfer pipe connecting portions in the second space forming portion.

Refrigerant distributor, heat exchanger, and refrigeration cycle apparatus

A refrigeration cycle apparatus includes a refrigerant circuit including a compressor, a condenser, a pressure reducing device, and an evaporator connected by a refrigerant pipe. A refrigerant including a refrigerant having flammability is used as refrigerant circulating in the refrigerant circuit. The evaporator and the pressure reducing device are accommodated in a unit. The evaporator is disposed in the unit in such a manner that a linear distance between a refrigerant inlet of the evaporator and a refrigerant outlet of the pressure reducing device is shorter than a linear distance between a refrigerant outlet of the evaporator and the refrigerant outlet of the pressure reducing device.

Refrigeration cycle apparatus

An outdoor heat exchanger includes: a main heat exchange area; a sub heat exchange area; and a connecting pipe and a connecting pipe interconnecting the main heat exchange area and the sub heat exchange area. The main heat exchange area has a main heat exchange channel and a main heat exchange channel. The sub heat exchange area has a sub heat exchange channel, a sub heat exchange channel, and a sub heat exchange channel. The connecting pipe connects the sub heat exchange channel and the sub heat exchange channel to the main heat exchange channel while the sub heat exchange channels are joined together. The connecting pipe interconnects the sub heat exchange channel and the main heat exchange channel.

Heat exchanger, outdoor unit and refrigeration cycle apparatus

A heat exchanger includes: a plate-like fin having one end and an other end in a first direction; and a first heat transfer tube and a second heat transfer tube that each extends through the fin and that are adjacent to each other in a second direction. A portion to which the fin and the first heat transfer tube are connected and a clearance portion that separates between the fin and the first heat transfer tube are disposed between the fin and the first heat transfer tube. The clearance portion is disposed at one end side in the first direction relative to an imaginary center line that passes through a center of the first heat transfer tube in a long side direction and that extends along a short side direction.

An auxiliary heat exchange unit of a heat exchanger has a first auxiliary heat exchange region and a second auxiliary heat exchange region. A main heat exchange unit has a first main heat exchange region, a second main heat exchange region, a third main heat exchange region, and a fourth main heat exchange region. The auxiliary heat exchange unit and the main heat exchange unit are configured to cause refrigerant to flow successively through the first auxiliary heat exchange region, the second auxiliary heat exchange region, the first main heat exchange region, the second main heat exchange region, the fourth main heat exchange region, and the third main heat exchange region when the heat exchanger functions as an evaporator.

Provided is a heat exchanger, including: a refrigerant distributor including: a gas-liquid separating portion having a function of separating a gas-liquid refrigerant mixture into a liquid refrigerant and a gas refrigerant; and a distributing portion provided to the gas-liquid separating portion. A plurality of heat transfer pipes connected to the distributing portion. The plurality of heat transfer pipes are arranged side by side in a first direction, and extend along a second direction intersecting with the first direction. When the refrigerant distributor is viewed along a direction orthogonal to each of the first direction and the second direction, a first space forming portion overlaps a region of the plurality of heat transfer pipes. When the refrigerant distributor and the heat transfer pipes are viewed along the first direction, a clearance is present between the gas-liquid separating portion and the heat transfer pipes.

Heat exchanger, and refrigeration cycle apparatus

In a heat exchanger, each of a plurality of heat exchange members includes: a main body portion including a heat transfer pipe; and extending portions provided to the main body. The extending portions extend from ends of the main body portion in a third direction. When a dimension of the main body portion in the third direction is represented by La, a dimension of the extending portions in the third direction is represented by Lf, a dimension of a wall thickness of each of the heat transfer pipes is represented by tp, and a thickness dimension of each of the extending portions is represented by Tf, relationships: Lf/La&#x2265;1 and Tf&#x2264;tp are satisfied.

An outdoor heat exchanger of an outdoor unit includes a main heat exchanger portion and an auxiliary heat exchanger portion. In the main heat exchanger portion, refrigerant path groups are formed. In the auxiliary heat exchanger portion, refrigerant paths are formed. The refrigerant path in the auxiliary heat exchanger portion, which is located closest to the main heat exchanger portion, is connected to the refrigerant path group in the main heat exchanger portion, which is disposed in a region where a wind velocity of the outdoor air passing through the main heat exchanger portion is relatively high. In addition, the refrigerant path is connected to the refrigerant path group. The refrigerant path is connected to the refrigerant path group. The refrigerant path is connected to the refrigerant path group.

Outdoor unit and refrigeration cycle apparatus including the same

An outdoor unit for an air-conditioning apparatus is configured to suppress damage on hairpin portions at an end portion of an outdoor heat exchanger due to freezing. The outdoor unit includes: an air passage defined inside a casing; an outdoor heat exchanger, which is installed in the air passage, and includes a plurality of heat exchange portions; an outdoor unit fan configured to introduce air into the outdoor heat exchanger; and an air passage blocking object installed in the air passage, and configured to block air flow. The outdoor heat exchanger includes: a heat transfer tube configured to allow refrigerant to pass therein; and a fin connected to the heat transfer tube. The heat transfer tube includes a hairpin portion, which is bent and folded back and to which no fin is connected. The air passage blocking object is configured to cover the hairpin portion.

Outdoor unit for an air-conditioning apparatus

A heat exchanger includes: a heat exchange unit group made up of a plurality of heat exchange units arranged in a row direction, the heat exchange units including a plurality of heat transfer tubes configured to allow refrigerant to pass therethrough, the heat transfer tubes being arrayed in a level direction, the level direction being perpendicular to the direction of air flow, and a plurality of fins stacked to allow air to pass therethrough in the air flow direction; and headers, disposed on both ends of the heat exchange unit group, the headers being connected with ends of the plurality of heat transfer tubes, the heat exchange unit group including one or more bend sections bent in the row direction, the headers including one header provided on one end of the heat exchange unit group in common for the plurality of rows of the heat exchange units, and a plurality of separate headers provided separately for the heat exchange units on the other end of the heat exchange unit group, the plurality of separate headers being arranged at positions different between adjacent rows, the positions being different in a fin-stacking direction in which the plurality of fins are stacked.

Heat exchanger, air-conditioning apparatus, refrigeration cycle apparatus and method for manufacturing heat exchanger

Growing community of inventors

Tokyo, Japan

Akira Ishibashi