Patents by Inventor Kohei Kasai

Kohei Kasai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 12211668
    Abstract: Provided is a charged particle beam device capable of detecting signal charged particles in a wide range of elevation angles from a large elevation angle to a small elevation angle and distinguishing detection signals between backscattered charged particles and secondary charged particles regardless of distribution of the signal charged particles. The charged particle beam device according to the disclosure includes a first detector that detects the secondary charged particles or the backscattered charged particles and a second detector that detects tertiary charged particles generated from the first detector, and generates an observation image of a sample using a signal value obtained by subtracting at least a part of a second detection signal output by the second detector from a first detection signal output by the first detector, or subtracting at least a part of the first detection signal from the second detection signal.
    Type: Grant
    Filed: December 22, 2021
    Date of Patent: January 28, 2025
    Assignee: Hitachi High-Tech Corporation
    Inventors: Kohei Suzuki, Shunsuke Mizutani, Yuji Kasai
  • Publication number: 20240392979
    Abstract: There is provided an outdoor unit of refrigeration cycle apparatus that can obtain a large airflow volume even when an external static pressure is high, while preventing an increase in size of the outdoor unit. For this object, the outdoor unit includes a housing in which a machine chamber and a blower chamber are formed, the blower chamber housing a heat exchanger and a blower inside. The blower is a double inlet centrifugal blower including: an impeller; and a scroll casing having suction ports and a discharge port, the scroll casing housing the impeller inside. A plurality of discharge ports are located on an outlet placement surface of the housing. A total width of the plurality of discharge ports in a direction horizontal with the housing placed and parallel to the outlet placement surface is more than a width of the blower chamber in said direction.
    Type: Application
    Filed: October 25, 2021
    Publication date: November 28, 2024
    Inventors: Takuya TERAMOTO, Hiroyasu HAYASHI, Ryoji ABE, Kohei KASAI, Koji YAMAGUCHI, Kazuya OKADA
  • Publication number: 20220057122
    Abstract: A refrigeration cycle apparatus includes; an air heat exchanger; a first expansion valve; a water heat exchanger; a flow passage switching device provided to a discharge part of a compressor; an injection pipe branched from a branch portion of a refrigerant pipe connecting the water heat exchanger with the first expansion valve, and is connected to an injection port of the compressor; a second expansion valve provided to the injection pipe; and an internal heat exchanger configured to exchange heat between refrigerant flowing between the water heat exchanger and the branch portion and refrigerant flowing from the second expansion valve and the injection pipe. The branch portion is provided downstream of the internal heat exchanger and upstream of the first expansion valve in a flow direction of the refrigerant when the flow passage switching device is operated in the first state.
    Type: Application
    Filed: March 6, 2019
    Publication date: February 24, 2022
    Inventor: Kohei KASAI
  • Patent number: 10955176
    Abstract: An air-conditioning apparatus includes a controller configured to control operations of an outdoor fan. The controller has a voltage acquisition unit configured to acquire drive voltages of the outdoor fan at set time intervals while the rotation speed of the outdoor fan is maintained at a reference rotation speed, a determination unit configured to determine whether or not an acquired drive voltage is equal to or greater than a lower limit threshold and less than an upper limit threshold, an extraction unit configured to calculate an evaluation value by extracting a drive voltage determined to be equal to or greater than the lower limit threshold and less than the upper limit threshold, and a defrosting determination unit configured to decide to defrost the outdoor heat exchanger if the calculated evaluation value is equal to or greater than an evaluation threshold.
    Type: Grant
    Filed: January 12, 2016
    Date of Patent: March 23, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kohei Kasai, Yohei Kato, Satoru Yanachi, Hiroaki Asanuma
  • Patent number: 10697677
    Abstract: A plate heat exchanger includes a plate stack including a plurality of heat transfer plates stacked with each other. Each of the heat transfer plates includes a heat medium inflow hole serving as an inlet for a heat medium, a heat medium outflow hole serving as an outlet for the heat medium, a refrigerant inflow hole serving as an inlet for refrigerant, and a refrigerant outflow portion located below the refrigerant inflow hole and serving as an outlet for the refrigerant. The heat transfer plates define heat medium passages, through each of which the heat medium flowing from the heat medium inflow hole flows, and refrigerant passages, through each of which the refrigerant flowing from the refrigerant inflow hole flows downward, arranged alternately with one another. Each of the heat medium passages and the refrigerant passages is defined between adjacent ones of the heat transfer plates.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: June 30, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Satoru Yanachi, Yohei Kato, Shinichi Uchino, Kohei Kasai, Tomoyoshi Obayashi, Kimitaka Kadowaki, Tetsuji Saikusa
  • Publication number: 20190170412
    Abstract: A plate heat exchanger includes a plate stack including a plurality of heat transfer plates stacked with each other. Each of the heat transfer plates includes a heat medium inflow hole serving as an inlet for a heat medium, a heat medium outflow hole serving as an outlet for the heat medium, a refrigerant inflow hole serving as an inlet for refrigerant, and a refrigerant outflow portion located below the refrigerant inflow hole and serving as an outlet for the refrigerant. The heat transfer plates define heat medium passages, through each of which the heat medium flowing from the heat medium inflow hole flows, and refrigerant passages, through each of which the refrigerant flowing from the refrigerant inflow hole flows downward, arranged alternately with one another. Each of the heat medium passages and the refrigerant passages is defined between adjacent ones of the heat transfer plates.
    Type: Application
    Filed: December 11, 2015
    Publication date: June 6, 2019
    Inventors: Satoru YANACHI, Yohei KATO, Shinichi UCHINO, Kohei KASAI, Tomoyoshi OBAYASHI, Kimitaka KADOWAKI, Tetsuji SAIKUSA
  • Publication number: 20180335236
    Abstract: An air-conditioning apparatus includes a controller configured to control operations of an outdoor fan. The controller has a voltage acquisition unit configured to acquire drive voltages of the outdoor fan at set time intervals while the rotation speed of the outdoor fan is maintained at a reference rotation speed, a determination unit configured to determine whether or not an acquired drive voltage is equal to or greater than a lower limit threshold and less than an upper limit threshold, an extraction unit configured to calculate an evaluation value by extracting a drive voltage determined to be equal to or greater than the lower limit threshold and less than the upper limit threshold, and a defrosting determination unit configured to decide to defrost the outdoor heat exchanger if the calculated evaluation value is equal to or greater than an evaluation threshold.
    Type: Application
    Filed: January 12, 2016
    Publication date: November 22, 2018
    Applicant: Mitsubishi Electric Corporation
    Inventors: Kohei KASAI, Yohei KATO, Satoru YANACHI, Hiroaki ASANUMA
  • Publication number: 20170363332
    Abstract: An air-conditioning apparatus includes a fan configured to deliver air toward the outdoor heat exchanger, a power unit configured to supply electric power to the fan, a fan input detector configured to detect a physical value related to the electric power supplied to the fan, and a controller configured to control the four-way valve to switch between a first operation in which the outdoor heat exchanger functions as an evaporator and a second operation in which the outdoor heat exchanger functions as a condenser. The first operation is switched to the second operation when the physical value detected by the fan input detector is equal to or larger than a reference value. The controller adjusts the reference value so that the reference value when refrigerant flowing through the outdoor heat exchanger has a high temperature is smaller than the reference value when the refrigerant has a low temperature.
    Type: Application
    Filed: February 18, 2015
    Publication date: December 21, 2017
    Inventors: Satoru YANACHI, Yohei KATO, Kohei KASAI, Shinichi UCHINO, Hirokazu MINAMISAKO, Takafumi MITO, Tsubasa TANDA
  • Patent number: 7960089
    Abstract: A compound of the present invention is a compound represented by a general formula (A-1) [wherein, R? represents a hydrogen atom or an acid-dissociable, dissolution-inhibiting group, provided that at least one R? group is an acid-dissociable, dissolution-inhibiting group, R11 to R17 each represent an alkyl group of 1 to 10 carbon atoms or an aromatic hydrocarbon group, which may include a hetero atom within the structure; g and j each represent an integer of 1 or greater, and k and q each represent an integer of 0 or greater, provided that g+j+k+q is not greater than 5; a represents an integer from 1 to 3; b represents an integer of 1 or greater, and l and m each represent an integer of 0 or greater, provided that b+l+m is not greater than 4; c represents an integer of 1 or greater, and n and o each represent an integer of 0 or greater, provided that c+n+o is not greater than 4; and A represents a group represented by a general formula (Ia) shown below, a group represented by a general formula (Ib) shown belo
    Type: Grant
    Filed: September 13, 2006
    Date of Patent: June 14, 2011
    Assignee: Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Daiju Shiono, Takahiro Dazai, Taku Hirayama, Kohei Kasai, Hideo Hada
  • Publication number: 20100183974
    Abstract: A compound of the present invention is a compound represented by a general formula (A-1) [wherein, R? represents a hydrogen atom or an acid-dissociable, dissolution-inhibiting group, provided that at least one R? group is an acid-dissociable, dissolution-inhibiting group, R11 to R17 each represent an alkyl group of 1 to 10 carbon atoms or an aromatic hydrocarbon group, which may include a hetero atom within the structure; g and j each represent an integer of 1 or greater, and k and q each represent an integer of 0 or greater, provided that g+j+k+q is not greater than 5; a represents an integer from 1 to 3; b represents an integer of 1 or greater, and l and m each represent an integer of 0 or greater, provided that b+l+m is not greater than 4; c represents an integer of 1 or greater, and n and o each represent an integer of 0 or greater, provided that c+n+o is not greater than 4; and A represents a group represented by a general formula (Ia) shown below, a group represented by a general formula (Ib) shown belo
    Type: Application
    Filed: September 13, 2006
    Publication date: July 22, 2010
    Applicant: Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Daiju Shiono, Takahiro Dazai, Taku Hirayama, Kohei Kasai, Hideo Hada