Patents Assigned to MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
  • Patent number: 10710426
    Abstract: A vehicle air conditioner which introduces a sufficient amount of primary air without providing a guide, and possible to install an aspirator in a large area in a downstream region of an air-mixing damper while avoiding interference with a mode-switching damper or the like and includes a case main unit of an air conditioning unit, an aspirator that introduces air circulating in an air channel at an interior of the case main unit as primary air and that sucks in air in a vehicle cabin as secondary air via an installation portion of an indoor temperature sensor, the case main unit is provided with a boss portion that communicates with the air channel at the interior of the case main unit and protrudes diagonally outward so as to face an air-circulation direction, and a primary-air introducing unit of the aspirator is installed by being diagonally inserted into the boss portion.
    Type: Grant
    Filed: December 25, 2013
    Date of Patent: July 14, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventor: Noriyuki Chikagawa
  • Patent number: 10707769
    Abstract: A power conversion circuit board is a board on which a power conversion circuit which converts direct current to alternating current is mounted. A low voltage circuit to which a low voltage is applied and a high voltage circuit to which a high voltage is applied are separately disposed in different areas on the same board surface. Further, in the high voltage circuit, a part of a wiring is formed on the board surface, and another wiring includes a bus bar which is provided with a predetermined distance from the board surface.
    Type: Grant
    Filed: February 15, 2016
    Date of Patent: July 7, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Makoto Hattori, Hiroyuki Kamitani, Hiroto Higuchi
  • Patent number: 10697680
    Abstract: A heat source system that optimizes a load on compressors in multiple heat source machines with respective independent refrigeration cycles that are situated in series. This is accomplished by using an information acquisition unit that acquires measurement values of operation frequencies of compressors from the respective heat source machines, a load distribution change unit that changes a load distribution currently assigned to each of the heat source machines, and a temperature setting unit that sets the hot/chilled water outlet temperatures of respective heat source machines.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: June 30, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Minoru Matsuo, Takeshi Fuchimoto
  • Publication number: 20200195086
    Abstract: A capacitor unit (20) includes: a harness side terminal (23) provided in a housing (22) for accommodating a capacitor main body therein and connectable to an electric power harness for supplying DC power from an outside; and a board side terminal (24) connectable to a circuit board from which the DC power is output via the capacitor main body. The board side terminal (24) extends in a plate shape from a base portion (24b) held in the housing (22) toward a distal end portion (24a) connected to the circuit board, and has a notch portion (40) recessed inward of the board side terminal (24) in a width direction between the base portion (24b) and the distal end portion (24a).
    Type: Application
    Filed: November 1, 2017
    Publication date: June 18, 2020
    Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Makoto HATTORI, Hiroyuki KAMITANI, Hiroto HIGUCHI, Takayuki TAKASHIGE
  • Patent number: 10677356
    Abstract: An object of the present invention is to achieve favorable sealability by a simple and low-cost structure using an O-ring. A sealing structure according to the present invention is provided with: a first sealing surface formed in an annular shape on a first container structural member configuring a housing (container); a second sealing surface overlaid on the first sealing surface, formed in annular shape on a second container structural member configuring the housing; a plurality of concentric O-ring grooves formed on at least one of the first sealing surface and second sealing surface; and a plurality of O-rings fitted into the plurality of O-ring grooves. The filling ratio of the O-ring in the O-ring groove positioned on an outer side of the housing is larger than the filling ratio of the O-ring in the O-ring groove positioned on an inner side of the housing.
    Type: Grant
    Filed: August 4, 2016
    Date of Patent: June 9, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Katsuhiro Fujita, Masahiro Kato, Tomohisa Moro, Hideki Suetake
  • Publication number: 20200173693
    Abstract: To provide a control device of a refrigerating cycle, a heat source device, and a control method therefor which are capable of realizing a stable low-load operation without using a hot gas bypass pipe. A centrifugal chiller includes a compressor compressing a refrigerant; a condenser condensing the refrigerant compressed by the compressor; an expansion valve expanding a liquid refrigerant delivered from the condenser; an evaporator evaporating the refrigerant expanded by the expansion valve; and a control device (10).
    Type: Application
    Filed: October 15, 2018
    Publication date: June 4, 2020
    Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Akimasa YOKOYAMA, Takahiro KONO
  • Publication number: 20200173443
    Abstract: A scroll compressor includes a flow path that is disposed in a portion of a bearing holder, which corresponds to each formation position of a plurality of stator groove portions, and that penetrates the bearing holder in an axial direction, a first recess portion (72) disposed in a portion of a thrust bearing, which faces the flow path, and recessed from one side in the axial direction to the other side in the axial direction, and a first groove portion (74) disposed in an outer peripheral portion of the first recess portion (72), extending from a bottom surface (72a) of the recess portion (72) to a surface located on a side opposite to a surface having the first recess portion (72) formed thereon, and communicating with the first recess portion (72) in the axial direction.
    Type: Application
    Filed: July 3, 2018
    Publication date: June 4, 2020
    Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Yuki ICHISE, Ichiro YOGO, Akinori YOSHIOKA, Manabu SUZUKI, Takeshi HIRANO
  • Patent number: 10673348
    Abstract: To improve the accuracy of detecting a current flowing through an electric compressor after operation of the electric compressor, the electric compressor having a large change in temperature before and after operation. An inverter-integrated electric compressor (1) that compresses and discharges a refrigerant suctioned therein, includes an inverter device (2) provided with a circuit board (60) mounted with an inverter circuit (40), the inverter device (2) being integrally incorporated in an inverter case. The circuit board (60) is provided with a current detection circuit (30) that detects an input current flowing through the inverter circuit (40), and an offset correction circuit (20). The current detection circuit (30) includes a shunt resistor (32) that is serially connected to the inverter circuit (40) and detects a current, and a first amplifier (31) that amplifies and outputs a voltage appearing as a voltage drop in the shunt resistor (32).
    Type: Grant
    Filed: August 22, 2016
    Date of Patent: June 2, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Masato Ito, Kenichi Aiba, Takashi Nakagami, Kyohei Watanabe, Naoki Nishikawa, Katsuhiro Saito, Kenji Shimizu
  • Patent number: 10662946
    Abstract: This electric compressor includes a compressor which rotates to compress a fluid, a motor which rotatably drives the compressor, and a control unit which controls current supply to the motor using first and second components. An allowable current for first and second components exposed to the same temperature is set to be smaller in the second component than in the first component. The second component is disposed at a place in which cooling capability is greater than that of the first component so that allowable power of the second component at rated use is greater than allowable power of the first component. This electric compressor includes a temperature sensor which detects the temperature of the first component and a calculation unit which outputs an alarm signal when the detected temperature and a current flowing in the first component satisfy a predetermined condition.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: May 26, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Takashi Nakagami, Takayuki Takashige
  • Publication number: 20200158356
    Abstract: The purpose of the present invention is to maintain a water supply temperature close to a target water supply temperature at the time of a change in the number of heat source machines operating. A heat source system of the present invention anticipates a case where a prescribed minimum flow rate is set for heat source machines that are subject to addition or removal, and calculates, as compensation temperatures, hot and cold water outlet temperatures of the heat source machines so that the water supply temperature in such a case will match a target water supply temperature, and changes the hot and cold water outlet temperature settings of the operating heat source machines to the compensation temperatures. After that, the heat source machines that are subject to addition or removal are either started up or stopped, and the set flow rate for the heat source machines that are subject to addition or removal is set to the minimum flow rate.
    Type: Application
    Filed: November 29, 2019
    Publication date: May 21, 2020
    Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Toshiaki OUCHI, Minoru MATSUO, Koki TATEISHI, Satoshi NIKAIDO
  • Patent number: 10655868
    Abstract: A controller for controlling a number of operating heat sources is provided. The controller detects a change in a number of secondary pumps that supply a heat transfer medium to a load device, determines the number of operating heat sources that changes as a load demand of the state of a load device changes, and switches the number of operating heat sources. The controller determines the number of operating heat sources when the change in the number of secondary pumps due to the change in the load demand is detected, and changes the number of heat sources for as long as at least one of a prescribed period has passed from a time when the change in the number of secondary pumps is detected or a prescribed condition with respect to a value that varies due to the change in the number of secondary pumps is satisfied.
    Type: Grant
    Filed: July 4, 2014
    Date of Patent: May 19, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Koki Tateishi, Satoshi Nikaido, Minoru Matsuo, Toshiaki Ouchi
  • Patent number: 10634140
    Abstract: In a scroll compressor that forms two suction volume parts by engaging paired fixed scroll and turning scroll with each other while scroll laps respectively erected on end plates of the fixed scroll and the turning scroll are opposed to each other and driving the turning scroll to revolve around the fixed scroll, out of the two suction volume parts, one of the suction volume parts that is formed close to a suction port provided in a housing is made larger than the other suction volume part.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: April 28, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Takayuki Kuwahara, Katsuhiro Fujita, Takayuki Hagita, Makoto Takeuchi, Hajime Sato, Genta Yoshikawa
  • Publication number: 20200128625
    Abstract: A heater is provided with a heating element that generates heat by electrical connection, anode and cathode plates each formed in a plate shape and are installed such that the heating element is sandwiched between the anode and cathode plates from both sides thereof, and a discharging unit installed in a heating element non-provided region and that discharges a surge current. The heating element non-provided region is included in a facing portion where the anode plate faces the cathode plate and differs from a heating element provided region where the heating element is provided.
    Type: Application
    Filed: March 22, 2017
    Publication date: April 23, 2020
    Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Keiji NAGASAKA, Hideo NAKAMURA, Yutaka KUBOTA, Masanori MARUYAMA, Hidetaka SATO, Tomoyasu OSAKI
  • Patent number: 10622862
    Abstract: An electric compressor motor housing is provided with: a motor housing main body (8), the interior of which is a cylindrical space for internally equipping a motor, and in which a plurality of refrigerant passages are formed around the cylindrical space, in the direction of the motor axis; an inverter accommodating portion (17) provided in an upper portion of the outer periphery of the motor housing main body (8); compressor attachment feet (19) provided in a plurality of locations in upper and lower portions of the outer periphery of the motor housing main body (8); and a refrigerant intake port (16) provided on a side surface toward the rear end of the motor housing main body (8); wherein one or more lines of ribs (24) are provided on the outer peripheral side surface of the motor housing main body (8), protruding outward and extending in the vertical direction.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: April 14, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Goshi Iketaka, Hiroshi Yamazaki, Masayuki Ishikawa, Keita Kitaguchi, Hideo Saho, Noriaki Arashi
  • Patent number: 10608547
    Abstract: To improve the accuracy of detecting a current flowing through an electric compressor after operation of the electric compressor, the electric compressor having a large change in temperature before and after operation. An inverter-integrated electric compressor (1) that compresses and discharges a refrigerant suctioned therein, includes an inverter device (2) provided with a circuit board (60) mounted with an inverter circuit (40), the inverter device (2) being integrally incorporated in an inverter case. The circuit board (60) is provided with a current detection circuit (30) that detects an input current flowing through the inverter circuit (40), and an offset correction circuit (20). The current detection circuit (30) includes a shunt resistor (32) that is serially connected to the inverter circuit (40) and detects a current, and a first amplifier (31) that amplifies and outputs a voltage appearing as a voltage drop in the shunt resistor (32).
    Type: Grant
    Filed: August 22, 2016
    Date of Patent: March 31, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Masato Ito, Kenichi Aiba, Takashi Nakagami, Kyohei Watanabe, Naoki Nishikawa, Katsuhiro Saito, Kenji Shimizu
  • Publication number: 20200095993
    Abstract: In this scroll fluid machine, a tip seal (7) that is in contact with facing end plates (5a) and that is for sealing in a fluid is provided to a tip seal groove (3d) formed on the tooth tip of a wall (3b). The tooth bottoms of the end plates (5a) have a shape in which a central section is deeper than a side section (5d3) in a width direction orthogonal to the spiral direction of a wall (5b). During operation, the protrusion amount (?) when the tip seal (7) protrudes from the tooth tip of the wall (3b) in an inclined section and is in contact with the facing end plates is greater than the protrusion amount (?) when the tip seal (7) protrudes from the tooth tip of the wall (3b) in a flat section and is in contact with the facing end plates.
    Type: Application
    Filed: June 21, 2018
    Publication date: March 26, 2020
    Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Hajime SATO, Yohei HOTTA, Yoshiyuki KIMATA, Takuma YAMASHITA
  • Publication number: 20200096243
    Abstract: There is provided a chiller control device (50) of a chiller system (1) that is provided with a centrifugal chiller (11) provided with a compressor (60) rotated by a motor (72), an operation panel (20) which is provided in the centrifugal chiller (11), operates the centrifugal chiller (11), and displays a state of the centrifugal chiller (11), and a starting panel (20) which supplies power to the motor (72) and starts the motor (72). The starting panel (10) begins supplying power to the motor (72) of the compressor (60) in response to a start command from the centrifugal chiller (11) to start the motor (72), and outputs a start answer and a start completion signal to the centrifugal chiller (11), and an abnormal state is output to the operation panel (20) if the start answer and/or the start completion signal continue to be output after the centrifugal chiller (11) has stopped.
    Type: Application
    Filed: April 24, 2018
    Publication date: March 26, 2020
    Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Takahiro KONO, Yasuhiro IKENO, Takaaki MIURA
  • Publication number: 20200096043
    Abstract: A rotary machine of the present invention is provided with: a bearing including an inner ring secured to an outer peripheral surface of a rotating element, an outer ring disposed outside the inner ring, and a plurality of rolling elements interposed between the inner ring and the outer ring; a bearing housing disposed outside the bearing and to which the outer ring is secured; a casing disposed outside the bearing housing and to which the bearing housing is secured; and a temperature difference reducer to reduce a difference between a temperatures of the outer and inner rings.
    Type: Application
    Filed: November 29, 2017
    Publication date: March 26, 2020
    Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Takeshi KANEKO, Yuichi OTANI, Jun MIYAMOTO, Yasushi HASEGAWA
  • Patent number: 10589592
    Abstract: An air conditioning device for vehicles including an evaporator for cooling air; a heater core for heating air; and a unit case having formed therein a cooling space for accommodating the evaporator, a heating space for accommodating the heater core, and an air mixing space connected to the cooling space and the heating space. A pair of foot flow passages is in communication with the unit case, the pair of foot flow passages extending from the air mixing space and being arranged at a distance from each other in the width direction of the vehicle so as to sandwich a rear face flow passage in the width direction. The rear face flow passage and at least a part of each of the foot flow passages overlap each other when viewed in the width direction.
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: March 17, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventor: Noriyuki Chikagawa
  • Patent number: 10590769
    Abstract: In a scroll fluid machine, a thinned section (26) is provided in correspondence with a position at which the wrap height of a spiral wrap (15B, 16B) changes due to a step part. The thinned section (26) is provided on the front-side surface or the rear-side surface of a tooth tip section of at least one of the spiral wraps (15B, 16B) of at least one of partner scrolls (15, 16) respectively engaging with scrolls (15, 16). The thinned section (26) is provided in the direction in which the wrap thickness decreases so as to extend over at least a reduced-machining-accuracy area (27), which is an area where the machining becomes discontinuous due to at least a change in the wrap height. Thus, a contact failure between the spiral wraps (15B, 16B) is avoided in the area where the machining accuracy relatively decreases as a result of increasing the machining speed, thereby achieving both improved productivity and maintained performance.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: March 17, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Makoto Takeuchi, Ei Onogawa, Takayuki Kuwahara