公开(公告)号：US10907871B2

公开(公告)日：2021-02-02

申请号：US16200889

申请日：2018-11-27

Applicant: Hitachi-Johnson Controls Air Conditioning, Inc.

Inventor： Hiroki Kinoshita ,  Kazuhiro Tsuchihashi ,  Naoyuki Fushimi ,  Toshiki Mochizuki ,  Shuntaro Inoue ,  Masayoshi Murofushi ,  Yoshinori Iwashina ,  Kazuhiko Tani

IPC: F25B47/00 ,  F25B41/04 ,  F25B13/00 ,  F25B41/00 ,  F25B49/02

Abstract: A refrigerant flow path switch arranged between an outdoor device and each of multiple indoor devices controls a refrigerant flow and is provided with a housing; a refrigerant flow path switching circuit having multiple refrigerant flow path switching circuits, wherein each refrigerant flow path switching circuit includes a high/low pressure gas pipe, a low pressure gas pipe, a high/low pressure electric valve provided at the high/low pressure gas pipe, and a low pressure electric valve provided at the low pressure gas pipe. A liquid pipe assembly is arranged in the housing and has multiple liquid pipes connected to the multiple indoor devices. A first divider plate is provided between adjacent ones of the refrigerant flow path switching circuits and divides an internal space of the housing such that a space divided by the first divider plate is in a substantially cubic shape, which is filled with a foaming agent.

公开(公告)号：US10557648B2

公开(公告)日：2020-02-11

申请号：US15618321

申请日：2017-06-09

Applicant: Hitachi-Johnson Controls Air Conditioning, Inc.

Inventor： Koji Naito ,  Naoyuki Fushimi ,  Kazumoto Urata ,  Gen Yasuda ,  Kazunori Fukuda

IPC: F25B13/00 ,  F25B49/02

Abstract: A cooling/heating switching unit includes first to third fittings, expansion valves and expansion-valve driving sections, a housing, a heat insulating material, and a refrigerant leak detection sensor. The first and second fittings respectively connect with a high/low-pressure-gas main pipe and a low-pressure-gas main pipe, which are linked to an outdoor unit. The third fitting connects with an indoor-unit connection pipe, which is linked to indoor units. The expansion valve for high/low-pressure-gas pipe, the expansion valve for low-pressure-gas pipe, and expansion-valve driving sections selectively connect the first or second fitting with the third fitting via a refrigerant pipe to control a flow direction of refrigerant. The housing houses the refrigerant pipe. The heat insulating material fills inside of the housing to insulate the refrigerant pipe arranged inside of the housing from heat. The refrigerant leak detection sensor is installed outside of the housing to detect leaked refrigerant.

公开(公告)号：US11408618B2

公开(公告)日：2022-08-09

申请号：US16424754

申请日：2019-05-29

Applicant: Hitachi-Johnson Controls Air Conditioning, Inc.

Inventor： Taku Iwase ,  Tomohiko Sato ,  Yoko Sato ,  Kunihito Kawamura ,  Koutarou Nomura ,  Naoyuki Fushimi ,  Shinji Nakahata

IPC: F24F1/0047 ,  F24F13/30 ,  F24F13/20 ,  F04D29/70

Abstract: Provided is an indoor unit of an air-conditioner including: an indoor unit body configured to be provided in a ceiling; a suction port attached to a lower surface of the indoor unit body; a panel including a blow port for blowing conditioned air into a room; and a louver provided at the blow port of the panel to change an air sending direction. The panel includes an outer frame provided outside the blow port and provided with a substantially horizontal flat portion, and a protruding portion provided on the flat portion of the outer frame and protruding vertically downward. A lower end of the protruding portion is positioned vertically above a lower end of the louver. A lower end of an inner flow path wall surface forming a flow path wall surface inside the blow port is positioned vertically below the lower end of the louver.