Patents by Inventor Shigeki Kamitani

Shigeki Kamitani 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: 10753640
    Abstract: A bottom frame (50) which constitutes a bottom surface of a casing (40) is divided into a main bottom frame (51) where a first compressor (11) is to be provided and a sub bottom frame (55) where a second compressor (21) is to be provided. The main bottom frame (51) is further divided into a first bottom frame (52) and a second bottom frame (53). The first compressor (11) is to be provided on the first bottom frame (52). A refrigerant circuit component (47) to be replaced or added in accordance with a capability or a function is to be provided on the second bottom frame (53).
    Type: Grant
    Filed: July 24, 2017
    Date of Patent: August 25, 2020
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Fumiaki Koike, Shigeki Kamitani, Takuya Horita, Daiki Hirawa, Yuusuke Tanaka, Taichi Koshiji
  • Patent number: 10731874
    Abstract: An outdoor unit for a refrigeration cycle apparatus includes: a fan; a bellmouth that covers a periphery of the fan; a casing that internally houses the fan and the bellmouth so that airflow faces upward and that has a top end edge having a flat shape; and a diffuser surface disposed below a top end edge of the casing but above a top end of the bellmouth and on the outer side relative to the top end of the bellmouth in plan view, wherein the diffuser surface is inclined to extend outward away from the rotation axis of the fan as getting upward. The casing has a plurality of side surfaces that cover the sides of the bellmouth. At least one of the side surfaces has a recessed shape toward the bellmouth so that a gap with the top end edge of the bellmouth is reduced.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: August 4, 2020
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Fumiaki Koike, Shigeki Kamitani
  • Publication number: 20200182491
    Abstract: Provided is an outdoor unit for a refrigeration apparatus, the outdoor unit being capable of suppressing decrease in reliability. An outdoor unit (10) includes: a compressor (12); an outdoor fan (18) configured to provide outdoor air flows (AF), the outdoor fan (18) being higher in heightwise position than the compressor (12); a high-heat generating electric component (65) configured to control the compressor (12); a fan controlling electric component (66) configured to control the outdoor fan (18); a board unit (75) including a compressor controlling electric component mount portion (75a) and a fan controlling electric component mount portion (75b); a first cooling unit (80); and an outdoor unit casing (40). The outdoor air flows (AF) flow from below upward in the outdoor unit casing (40), and flow out of the outdoor unit casing (40) through a blow-out port (402).
    Type: Application
    Filed: August 6, 2018
    Publication date: June 11, 2020
    Inventors: Miho KUROKAWA, Shigeki KAMITANI, Taichi KOSHIJI
  • Publication number: 20200158354
    Abstract: An outdoor unit for a refrigeration apparatus includes: a casing that houses a plurality of devices including a first device and a second device; a plurality of electric components including a first electric component and a second electric component; an electric component box disposed in the casing and that houses the plurality of electric components; a first wire that carries a first voltage or current between the first electric component and the first device; a second wire that carries a second voltage or current between the second electric component and the second device; and a cover part that suppresses entry of liquid into the electric component box. The second voltage or current is lower than the first voltage or current.
    Type: Application
    Filed: August 6, 2018
    Publication date: May 21, 2020
    Inventors: Miho KUROKAWA, Shigeki KAMITANI, Taichi KOSHIJI
  • Publication number: 20200149752
    Abstract: An outdoor unit of a refrigeration apparatus includes: a fan that generates an upward flow of air passing through a heat exchanger; an electric component box that accommodates a group of electric components; and a casing that includes a panel disposed at a predetermined position opposite to the electric component box. The panel is divided into at least a first panel and a second panel in a lateral direction as viewed from a front view of the panel. The first panel is opposed to at least part of the electric component box. The first panel is detachable from the casing while the second panel remains attached to the casing.
    Type: Application
    Filed: July 24, 2018
    Publication date: May 14, 2020
    Inventors: Daiki HIRAWA, Fumiaki KOIKE, Shigeki KAMITANI
  • Patent number: 10488066
    Abstract: An indoor fan, an indoor heat exchanger, and refrigerant piping are housed in a casing having an air inlet and air outlets. An air conditioning indoor unit includes a first temperature sensor that measures a temperature of air in an air conditioning target space, a second temperature sensor that measures a temperature of the refrigerant piping, and a determining component that determines if there is refrigerant leakage while operation is stopped. The determining component performs a refrigerant leakage determination that is a determination whether there is refrigerant leakage based on a difference between the temperatures detected by the first temperature sensor and the second temperature sensor.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: November 26, 2019
    Assignee: Daikin Industries, Ltd.
    Inventors: Masahiro Honda, Shigeki Kamitani
  • Publication number: 20190338964
    Abstract: A heat source unit including: mounting feet; a bottom frame disposed on the mounting feet; vibration-proofing members that are disposed between the bottom frame and the mounting feet and space the bottom frame apart from the mounting feet; and a plurality of struts that extend upward from the mounting feet. All of the struts are anchored to the mounting feet without being anchored to the bottom frame.
    Type: Application
    Filed: February 28, 2017
    Publication date: November 7, 2019
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Fumiaki Koike, Shigeki Kamitani
  • Publication number: 20190338985
    Abstract: A bottom frame (50) which constitutes a bottom surface of a casing (40) is divided into a main bottom frame (51) where a first compressor (11) is to be provided and a sub bottom frame (55) where a second compressor (21) is to be provided. The main bottom frame (51) is further divided into a first bottom frame (52) and a second bottom frame (53). The first compressor (11) is to be provided on the first bottom frame (52). A refrigerant circuit component (47) to be replaced or added in accordance with a capability or a function is to be provided on the second bottom frame (53).
    Type: Application
    Filed: July 24, 2017
    Publication date: November 7, 2019
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Fumiaki KOIKE, Shigeki KAMITANI, Takuya HORITA, Daiki HIRAWA, Yuusuke TANAKA, Taichi KOSHIJI
  • Patent number: 10408484
    Abstract: An air-conditioning apparatus includes at least one indoor unit with intake and blow-out ports, a refrigerant gas sensor disposed in an air flow path inside the indoor unit; and a control device. The indoor unit has an indoor fan drawing indoor air in from the intake port and blowing conditioned air out from the blow-out port, an indoor temperature sensor detecting temperature of the indoor air, an indoor-side refrigerant circuit circulating a refrigerant having a greater specific gravity when gasified than air and producing conditioned air from the indoor air, and at least one refrigerant temperature sensor detecting refrigerant temperature in the refrigerant circuit. The control device drives the indoor fan in accordance with at least one of an operation mode and a detection value of the at least one refrigerant temperature sensor, and detects refrigerant leakage using the refrigerant gas sensor.
    Type: Grant
    Filed: March 28, 2016
    Date of Patent: September 10, 2019
    Assignee: Daikin Industries, Ltd.
    Inventors: Masahiro Honda, Shigeki Kamitani
  • Publication number: 20190154279
    Abstract: A heat source unit includes a compressor and an electrical component box both disposed inside a casing, where a bottom frame forming a bottom surface of the casing includes a first bottom frame on which the compressor is disposed and a second bottom frame that is adjacent to the first bottom frame. At least half of the electrical component box is placed above the second bottom frame.
    Type: Application
    Filed: February 28, 2017
    Publication date: May 23, 2019
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Fumiaki Koike, Shigeki Kamitani
  • Publication number: 20190137119
    Abstract: A heat source unit includes: a corrugated plate-like bottom frame in which ridges and furrows extend across the front and rear direction or across the right and left direction; and mounting feet. The mounting feet include: supports that support, from below, the furrows of supported ends of the bottom frame on sides that the ridges and the furrows can be seen; and walls disposed on outer sides of the supported ends and that extend upward from the supports. Water drainage passages, that drain water sticking to tops of the ridges of the supported ends to the supports, are disposed above the supports.
    Type: Application
    Filed: April 17, 2017
    Publication date: May 9, 2019
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Fumiaki Koike, Shigeki Kamitani, Daiki Hirawa
  • Patent number: 10274246
    Abstract: An outdoor unit of an air conditioning device includes an outdoor unit main body having a square planar shape, a heat exchanger provided along a side surface of this outdoor unit main body, and a fan provided in an upper part of the outdoor unit main body, the fan for blowing out air in the outdoor unit main body upward. An opening portion capable of providing communication between an interior and an exterior of the outdoor unit main body is formed between a one side end portion and an other side end portion of the heat exchanger adjacent to each other, and in at least one of the side end portions positioned in a peripheral edge of the opening portion, a cover member for covering a heat transfer tube protruding from the side end portion is provided.
    Type: Grant
    Filed: May 16, 2012
    Date of Patent: April 30, 2019
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Mikio Kagawa, Shigeki Kamitani
  • Publication number: 20190120506
    Abstract: A heat source unit constitutes part of a basic refrigerant circuit including: a compressor that compresses refrigerant; an accumulator that temporarily accumulates the refrigerant before the refrigerant is sucked into the compressor; an oil separator that separates refrigerating machine oil from the refrigerant after the refrigerant has been discharged from the compressor; a heat source-side heat exchanger that functions as a radiator or an evaporator of the refrigerant; a liquid refrigerant communication pipe; utilization-side expansion valves; utilization-side heat exchangers; and a gas refrigerant communication pipe that are connected to one another, the heat source unit comprising refrigerant circuit constituent parts including the compressor, the accumulator, the oil separator, and the heat source-side heat exchanger that are provided inside a casing, and the refrigerant circuit constituent parts being changed or added in accordance with capacity or function.
    Type: Application
    Filed: April 17, 2017
    Publication date: April 25, 2019
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Fumiaki Koike, Shigeki Kamitani
  • Publication number: 20190107297
    Abstract: An outdoor unit for a refrigeration cycle apparatus includes: a fan; a bellmouth that covers a periphery of the fan; a casing that internally houses the fan and the bellmouth so that airflow faces upward and that has a top end edge having a flat shape; and a diffuser surface disposed below a top end edge of the casing but above a top end of the bellmouth and on the outer side relative to the top end of the bellmouth in plan view, wherein the diffuser surface is inclined to extend outward away from the rotation axis of the fan as getting upward. The casing has a plurality of side surfaces that cover the sides of the bellmouth. At least one of the side surfaces has a recessed shape toward the bellmouth so that a gap with the top end edge of the bellmouth is reduced.
    Type: Application
    Filed: April 21, 2017
    Publication date: April 11, 2019
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Fumiaki Koike, Shigeki Kamitani
  • Publication number: 20180372379
    Abstract: An air conditioner includes a liquid pressure adjusting expansion valve that is located in an outdoor liquid refrigerant pipe at a part thereof closer to a liquid refrigerant communication pipe than to a refrigerant cooler and configured to reduce a pressure of a refrigerant so that a refrigerant flows through the liquid refrigerant communication pipe in a gas-liquid two-phase state and so that the refrigerant flows through an outlet of a refrigerant cooler in a liquid state.
    Type: Application
    Filed: June 15, 2016
    Publication date: December 27, 2018
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Shigeki KAMITANI, Masahiro HONDA
  • Publication number: 20180283718
    Abstract: An air-conditioning apparatus includes at least one indoor unit with intake and blow-out ports, a refrigerant gas sensor disposed in an air flow path inside the indoor unit; and a control device. The indoor unit has an indoor fan drawing indoor air in from the intake port and blowing conditioned air out from the blow-out port, an indoor temperature sensor detecting temperature of the indoor air, an indoor-side refrigerant circuit circulating a refrigerant having a greater specific gravity when gasified than air and producing conditioned air from the indoor air, and at least one refrigerant temperature sensor detecting refrigerant temperature in the refrigerant circuit. The control device drives the indoor fan in accordance with at least one of an operation mode and a detection value of the at least one refrigerant temperature sensor, and detects refrigerant leakage using the refrigerant gas sensor.
    Type: Application
    Filed: March 28, 2016
    Publication date: October 4, 2018
    Inventors: Masahiro HONDA, Shigeki KAMITANI
  • Publication number: 20180283719
    Abstract: An indoor fan, an indoor heat exchanger, and refrigerant piping are housed in a casing having an air inlet and air outlets. An air conditioning indoor unit includes a first temperature sensor that measures a temperature of air in an air conditioning target space, a second temperature sensor that measures a temperature of the refrigerant piping, and a determining component that determines if there is refrigerant leakage while operation is stopped. The determining component performs a refrigerant leakage determination that is a determination whether there is refrigerant leakage based on a difference between the temperatures detected by the first temperature sensor and the second temperature sensor.
    Type: Application
    Filed: March 30, 2016
    Publication date: October 4, 2018
    Inventors: Masahiro HONDA, Shigeki KAMITANI
  • Patent number: 10082324
    Abstract: A refrigeration apparatus includes a primary circuit with a first expansion valve, a bypass circuit extending between branching and joining portions on the refrigerant primary circuit, a heat exchanger, a second expansion valve disposed upstream of the heat exchanger in the bypass circuit, first and second refrigerant flow rate calculating components, and a determining component. The primary circuit also includes a compressor, radiator, and evaporator. The heat exchanger includes first and second refrigerant flow paths disposed on the primary and bypass circuits, respectively, to cause heat between refrigerant flowing in the paths. The first and second refrigerant flow rate calculating components calculate first and second flow rates of refrigerant flowing through the bypass circuit based on refrigeration cycle theory and fluid theory, respectively.
    Type: Grant
    Filed: March 28, 2016
    Date of Patent: September 25, 2018
    Assignee: Daikin Industries, Ltd.
    Inventors: Masahiro Honda, Shigeki Kamitani
  • Publication number: 20180180338
    Abstract: As a shut-off valve inspection process for checking operation of a liquid side shut-off valve and a gas side shut-off valve, an air conditioning system operates a compressor in a cooling cycle state, performs opening and closing operation of the liquid side shut-off valve and the gas side shut-off valve, and determines whether the liquid side shut-off valve and the gas side shut-off valve properly operate on the basis of a temperature value detected by a temperature sensor provided in an indoor unit.
    Type: Application
    Filed: June 15, 2016
    Publication date: June 28, 2018
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Masahiro HONDA, Shigeki KAMITANI
  • Publication number: 20180080692
    Abstract: A refrigeration apparatus includes a primary circuit with a first expansion valve, a bypass circuit extending between branching and joining portions on the refrigerant primary circuit, a heat exchanger, a second expansion valve disposed upstream of the heat exchanger in the bypass circuit, first and second refrigerant flow rate calculating components, and a determining component. The primary circuit also includes a compressor, radiator, and evaporator. The heat exchanger includes first and second refrigerant flow paths disposed on the primary and bypass circuits, respectively, to cause heat between refrigerant flowing in the paths. The first and second refrigerant flow rate calculating components calculate first and second flow rates of refrigerant flowing through the bypass circuit based on refrigeration cycle theory and fluid theory, respectively.
    Type: Application
    Filed: March 28, 2016
    Publication date: March 22, 2018
    Inventors: Masahiro HONDA, Shigeki KAMITANI