公开(公告)号：US11280530B2

公开(公告)日：2022-03-22

申请号：US15757779

申请日：2015-09-11

Applicant: Hitachi-Johnson Controls Air Conditioning, Inc.

Inventor： Shuuhei Tada ,  Katsuaki Nagahashi ,  Koji Naito

IPC: F25B49/02 ,  F04B49/10 ,  F04B35/04 ,  F25B49/00 ,  F25B13/00 ,  F04B49/06 ,  F04C23/00 ,  F04C28/28 ,  F04C18/02

Abstract: To predict and detect a failure in a compressor provided in an air conditioner, the air conditioner is provided with: a heat exchanger; the compressor; piping connecting the heat exchanger and the compressor with each other; and a control unit controlling the compressor and having a compressor failure predicting and detecting means, and in this air conditioner, the compressor failure predicting and detecting means of the control unit includes: a current detecting part detecting a driving current driving the compressor; a pulsation detecting part detecting pulsation in a driving current detected by the current detecting part; and an anomaly determining part predicting or detecting any failure in the compressor based on a magnitude and a duration of pulsation in a driving current detected by the pulsation detecting part.

公开(公告)号：US10415842B2

公开(公告)日：2019-09-17

申请号：US15768667

申请日：2017-11-08

Applicant: Hitachi-Johnson Controls Air Conditioning, Inc.

Inventor： Katsuaki Nagahashi ,  Koji Naito ,  Hayato Mori

IPC: F25B47/02 ,  F24F11/38 ,  F24F11/42 ,  F24F11/32 ,  F24F11/52 ,  F24F11/62 ,  F24F11/54 ,  F24F1/06 ,  F24F1/38

Abstract: Provided is an outdoor unit for an air conditioner and the like that provide notification of whether maintenance is needed for an outdoor heat exchange unit in appropriate timing. The outdoor unit for the air conditioner includes: a compressor; an outdoor heat exchange unit through which a refrigerant flows by driving of the compressor; an outdoor fan that includes an outdoor fan motor and is installed near the outdoor heat exchange unit; and a control unit that provides notification of whether maintenance is needed for the outdoor heat exchange unit based on an airflow resistance during an outdoor air-sending operation in which the outdoor fan is driven to send outdoor air into the outdoor heat exchange unit while the compressor is stopped. This makes it possible to provide the notification of whether the maintenance is needed for the outdoor heat exchange unit in appropriate timing.

公开(公告)号：US10359211B2

公开(公告)日：2019-07-23

申请号：US15756465

申请日：2016-08-10

Applicant: Hitachi-Johnson Controls Air Conditioning, Inc.

Inventor： Hayato Mori ,  Shuntaro Inoue ,  Shoutaro Yamamoto ,  Katsuaki Nagahashi

IPC: F24F1/00 ,  F24F1/50 ,  F24F5/00 ,  F24F13/20 ,  F24F13/24 ,  F24F13/32

Abstract: A refrigeration and air conditioning device, which is an outdoor unit of a refrigeration and air conditioning device provided with a heat exchanger within a housing (2) and blowers (3) arranged on the housing, the housing (2) being provided with a side cover covering the sides, a base (9) covering the bottom and a foot portion (10) arranged below the base (9), the foot portion (10) being provided with a raised portion (10b) upwardly bending an end face (10c) of a lower surface of the foot portion. The refrigeration and air conditioning device increases rigidity without increasing costs.