Hitachi-johnson Controls Air Conditioning, Inc.

Tyco Fire & Security Gmbh

Hitachi-ge Nuclear Energy, Ltd.

Hayato Mori

Koji Naito

Katsuaki Nagahashi

Robert D Turney

Michael J Wenzel

Satoshi Okada

Mohammad N ElBsat

Naoyuki Kono

Kazumoto Urata

Liming Yang

Yasutaka Yoshida

Katsuhiko Hirano

Ryosuke Kobayashi

Shuntaro Inoue

Masahiro Tooma

Zhigang Wu

Yosuke Takatori

Shuuhei Tada

Shoutaro Yamamoto

Zhongyue Sun

Bo Fan

A refrigerant charge controller for heating, ventilation, or air conditioning (HVAC) equipment includes a processing circuit configured to analyze usage data for the HVAC equipment using a machine learning model to estimate an amount of refrigerant used by the HVAC equipment, identify a refrigerant deficiency based on the amount of refrigerant, and initiate a corrective action in response to identifying the refrigerant deficiency.

Systems and methods for controlling variable refrigerant flow systems using artificial intelligence

An air conditioner controller for an air conditioner is configured to obtain a first value of a performance value from a predetermined component of the air conditioner, and estimate a total cost. The controller is configured to estimate the total cost including an operation cost and a renewal cost of the air conditioner based on the first value of the performance variable obtained from the predetermined component of the air conditioner and a second value of the performance variable estimated by an operational model of the air conditioner. The total cost is a total cost of operating and renewing the air conditioner for a time period after a time at which the first value of the performance variable is obtained. The controller is configured to output the total cost via a user interface.

Air condition management apparatus, system, and method

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.

Outdoor unit for air conditioner, air conditioner, and method for controlling air conditioner

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 () and blowers () arranged on the housing, the housing () being provided with a side cover covering the sides, a base () covering the bottom and a foot portion () arranged below the base (), the foot portion () being provided with a raised portion () upwardly bending an end face () of a lower surface of the foot portion. The refrigeration and air conditioning device increases rigidity without increasing costs.

Refrigeration and air conditioning device

An air conditioner capable of detecting resonance of a casing of an outdoor or indoor unit of an air conditioner at a low cost with high accuracy is provided. An outdoor unit of the air conditioner includes: a propeller fan that blows air to a heat exchanger; a fan motor that drives the propeller fan; a current detector that detects a current value of the fan motor; a phase detector that detects the magnetic pole position of the fan motor; a fan rotation speed detector that detects the rotation speed of the fan motor; a pulsation detector that detects pulsation of the current value; and a resonance determiner that determines resonance of a system of a casing of the outdoor unit having the fan motor. If the resonance determiner determines resonance, a controller executes resonance avoidance control for increasing or decreasing the fan rotation speed by a predetermined rotation speed.

Air conditioner

A system for attitude control of an underwater vehicleof the present invention includes an underwater vehiclewith a thruster, an assist devicethat is coupled to the underwater vehiclewith a cableand has cable handling equipmentand a thruster, a cable attachment-to-attachment distance detection unitthat detects distance between a cable attachment of the underwater vehicleand a cable dispenser of the assist device, and a control unitthat previously stores the relationship between the attachment-to-attachment distance and cable length including a predetermined amount of slack and determines the amount of cable to be wound up or let out based on the cable length associated with the detected attachment-to-attachment distance.

System for attitude control of underwater vehicle and method for attitude control of underwater vehicle

Growing community of inventors

Tokyo, Japan

Hayato Mori