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：US10557654B2

公开(公告)日：2020-02-11

申请号：US16239776

申请日：2019-01-04

Applicant: HITACHI-JOHNSON CONTROLS AIR CONDITIONING, INC.

Inventor： Kazunori Fukuda ,  Koji Naito ,  Kazuhiro Tsuchihashi

IPC: F25B41/04 ,  F24F1/20 ,  F24F1/30 ,  F25B13/00

Abstract: An collective device for switching refrigerant flow arranged between an indoor device and an outdoor device is provided; which includes multiple high-pressure valves; multiple low-pressure valves; a high-pressure header; a low-pressure header; a high-pressure gas pipe connecting each high-pressure valve and the high-pressure header; and a low-pressure gas pipe connecting each low-pressure valve and the low-pressure header, wherein the multiple high-pressure valves are arranged next to each other in a first direction perpendicular to a vertical direction, the multiple low-pressure valves are arranged next to each other in the first direction, and the low-pressure valves, the low-pressure header, and the low-pressure gas pipe are arranged on one side in a second direction perpendicular to the vertical direction and the first direction with respect to the high-pressure valves, the high-pressure header, and the high-pressure gas pipe.