Mitsubishi Electric Corporation

Nec Corporation

Kabushiki Kaisha Toshiba

Other

Ntt Docomo, Inc.

Hoya Corporation

National Institute of Advanced Industrial Science and Technology

The University of Tokyo

Mitsubishi Electric Corpotation

Shin Nakamura

Akira Ishibashi

Tsuyoshi Maeda

Daisuke Ito

Shinya Higashiiue

Yuki Ugajin

Akira Yatsuyanagi

Shigeyoshi Matsui

Ryota Akaiwa

Tsubasa Tanda

Kenichi Maruhashi

Satoshi Ueyama

Kentaro Nakahara

Yohei Kato

Yoshimi Kubo

Takashi Manako

Atsushi Mochizuki

Satoko Itaya

Tsutomu Yoshitake

Hidekazu Kimura

Yuichi Shimakawa

Ryuichi Nagata

Hideto Imai

Sadanori Kuroshima

Akio Nakagawa

Takashi Okazaki

Katsumi Maeda

Takumi Nishiyama

Yuan Luo

Aya Kawashima

Kenji Kobayashi

Hiroshi Kawakami

Takashi Matsumoto

Ichiro Omura

Jun Akedo

Keishi Ohashi

Junichi Ono

Yoji Onaka

Hideaki Maeyama

Yusuke Tashiro

Suguru Watanabe

Masahiro Suguro

Rie Tanaka

Sangmu Lee

Tomohiko Takahashi

Susumu Yoshimura

Toshiya Okabe

Tetsuo Yano

Tomoyuki Hayashi

Hironao Tanaka

Yumi Hirano

Eiji Hihara

Chaobin Dang

Jiyang Li

Takeshi Obata

Taketoshi Hibiya

Mamoru Kurata

Atsushi Morita

Shoji Sekino

Yuta Komiya

Hiroki Tsuda

Shun Kato

Kenichi Kitani

Terumasa Shimoyama

Shantanu Chakraborty

Ryo Terashima

Koki Murano

Kazuo Onuma

Yoshie Suzuki

Yuki Yamanouchi

Hidenari Ogata

Masaru Furukaya

An input-output data collector collects, from a programmable logic controller, input-output data representing a log for a device in a program predetermined as a logging target program of one or more programs executable by the programmable logic controller. An input-output data generator generates, when a debugging target program is determined not to be included in the predetermined program, input-output data representing a log for a device in the debugging target program by executing a simulation program simulating an operation of the programmable logic controller.

Debugging assistance device, control system, debugging assistance method, and recording medium

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

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 improve a heat exchange performance, a discharge performance, and a frosting resistance, and each include: a flat tube; a fin formed in the shape of a plate having a plate surface extending in a longitudinal direction of the fin that is perpendicular to a width direction thereof, coincides with an up/down direction, and crosses the tube axis of the flat tube; and a first water conveyance member provided below the fin. The first water conveyance member has: a first upper surface facing a lower end portion of the fin; a first ridge located at one end portion of the first upper surface; and a second ridge located at the other end portion of the first upper surface.

Heat exchanger, heat exchanger unit, and refrigeration cycle apparatus

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.

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

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.

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.

A refrigeration cycle apparatus includes a refrigerant circuit, by pipes, connecting a compressor, a flow switching device, a first heat exchanger, an expansion device, and a second heat exchanger. As refrigerant to be circulated through the refrigerant circuit, any one of a refrigerant having saturated gas temperature under standard atmospheric pressure that is higher than that of R32 and a refrigerant mixture mainly composed of the refrigerant is used. The refrigerant circuit includes an internal heat exchanger configured to exchange heat between the refrigerant flowing through a refrigerant-inlet side of the second heat exchanger and the refrigerant flowing through a refrigerant-outlet side of the second heat exchanger.

Refrigeration cycle apparatus

A heat exchanger includes a fin having a first through hole into which a first heat transfer tube is inserted and a second through hole into which a second heat transfer tube is inserted and including a first end portion and a second end portion, in which a virtual straight line passing through end portions on the first end portion side of the first heat transfer tube and the second heat transfer tube is a first virtual straight line, a virtual straight line passing through end portions on the second end portion side of the first heat transfer tube and the second heat transfer tube is a second virtual straight line, a region between the first end portion and the first virtual straight line is a first drainage region, a region between the second end portion and the second virtual straight line is a second drainage region, and a region enclosed by the first heat transfer tube, the second heat transfer tube, the first virtual straight line and the second virtual straight line is a water introducing region, a first groove inclined to descend toward the first drainage region and a second groove inclined to descend toward the second drainage region are formed in the water introducing region.

Heat exchanger and refrigeration cycle device

A heat exchanger includes a plurality of flat tubes provided to extend in a first direction, and a plurality of plate-shaped fins having respective surfaces extending in a second direction. The surface has a windward edge and a leeward edge. The plurality of flat tubes include a first flat tube disposed most windward in the second direction, and a second flat tube spaced apart from the first flat tube and disposed most leeward in the second direction. In the second direction, a distance between the leeward edge and a center of a flat shape of the second flat tube is at least one-third of a width between the windward edge and the leeward edge.

Heat exchanger

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

A refrigeration cycle apparatus includes a refrigerant circuit which allows refrigerant to circulate therethrough, and an outdoor heat exchanger which exchanges heat between the refrigerant and outdoor air. The outdoor heat exchanger has first to third heat exchange sections. The second heat exchange section is located below the first heat exchange section, and the third heat exchange section is located below the second heat exchange section. In a refrigerant passage connecting the second and third heat exchange sections, a first pressure reducing device reduces a pressure of the refrigerant flowing through the refrigerant passage. In an operation mode in which the first and second heat exchange sections each serve as an evaporator, the third heat exchange section is located upstream of the second heat exchange section in the flow of the refrigerant, and refrigerant having a temperature higher than that of the outdoor air flows through the third heat exchange section.

A heat exchanger according to an embodiment of the invention includes a fin extending in the gravity direction and heat transfer pipes installed so as to intersect the fin. The heat transfer pipes are arranged in the gravity direction. The fin has a water guiding area disposed above and below each of the heat transfer pipes, and a water drainage area disposed adjacent to a side of each of the heat transfer pipes. The water guiding area has water guiding structures for guiding water to the water drainage area. The water drainage area has water drainage structures for guiding water in the gravity direction.

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

Growing community of inventors

Tokyo, Japan

Shin Nakamura