Patents Assigned to MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
  • Publication number: 20210252943
    Abstract: This air conditioning device for a vehicle comprises: an indoor condenser; an indoor evaporator; a first expansion valve; a second expansion valve; a refrigerant line; an expansion valve control detector; and a controller. The expansion valve control detector is constituted by: only one temperature sensor that detects the temperature of refrigerant in an inter-expansion valve line of the refrigerant line; and only one pressure sensor that detects the pressure of the refrigerant in the inter-expansion valve line. During a cooling operation, the controller issues, to the first expansion valve, an opening command corresponding to a state quantity of the refrigerant that has been detected by the expansion valve control detector, and during a heating operation, the controller issues, to the second expansion valve, an opening command corresponding to a state quantity of the refrigerant that has been detected by the expansion valve control detector.
    Type: Application
    Filed: May 24, 2019
    Publication date: August 19, 2021
    Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Nobuya NAKAGAWA, Yasuo KATAYAMA, Soichiro FUJITA
  • Patent number: 11092155
    Abstract: A scroll compressor comprising a fixed scroll (15); an orbiting scroll (16) supported in a manner allowing for orbiting motion; a discharge port through which a fluid compressed by the two scrolls (15, 16) is discharged; an end plate step portion (16E) provided on an end plate of the orbiting scroll (16) formed so that a height of the end plate is higher on a center portion side in the direction of a spiral wrap and lower on an outer end side; and a wrap step portion (15E) provided on a wall portion of the fixed scroll (15) that corresponds to the end plate step portion (16E) so that a height of the wall portion is lower on the center portion side of the spiral and higher on the outer end side; wherein the orbiting scroll (16) is treated for surface hardening and the fixed scroll (15) is not treated for surface hardening.
    Type: Grant
    Filed: March 8, 2016
    Date of Patent: August 17, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Hajime Sato, Makoto Takeuchi, Genta Yoshikawa, Kazuhide Watanabe, Katsuhiro Fujita, Takayuki Hagita, Takayuki Kuwahara
  • Publication number: 20210237538
    Abstract: This vehicle-mounted air conditioner control device (1) comprises: a PTC heater (H) that is included in a high-voltage system circuit (HV) and generates heat by the power supplied from a high-voltage battery (B2); and a microcomputer (10) that is included in the high-voltage system circuit (HV) and controls the power supply from the high-voltage battery (B2) to the PTC heater (H). This vehicle-mounted air conditioner control device (1) further comprises: a water temperature sensor (151, 152) that is included in a low-voltage system circuit (LV) and outputs a voltage signal corresponding to the temperature of hot water; and a V/f conversion unit (161, 162) that is included in the low-voltage system circuit (LV) and converts the voltage signal output from the water temperature sensor (151, 152) into a frequency signal.
    Type: Application
    Filed: April 19, 2019
    Publication date: August 5, 2021
    Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Hidetaka SATO, Tomoyasu OSAKI, Keiji NAGASAKA, Ryota KOJIMA
  • Patent number: 11078906
    Abstract: A scroll fluid machine that attenuates the bending stress applied to the base of a wall body having an inclined section. The scroll fluid machine is provided with a wall body inclined section in which the distance between the facing surfaces of an end plate of a fixed scroll and an end plate of a rotating scroll that face each other continuously decreases from the outer circumferential side toward the inner circumferential side. A mesh clearance that is a gap between wall bodies formed when the wall bodies mesh with each other is larger on the outer circumferential side of the inclined section than on the inner circumferential side of the inclined section. The mesh clearance is made larger by drawing the wall surface of a wall body further back toward the central side of the wall body in the thickness direction than the original wall surface profile thereof.
    Type: Grant
    Filed: August 14, 2017
    Date of Patent: August 3, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Hajime Sato, Yoshiyuki Kimata, Yohei Hotta
  • Patent number: 11060741
    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: Grant
    Filed: November 29, 2019
    Date of Patent: July 13, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Toshiaki Ouchi, Minoru Matsuo, Koki Tateishi, Satoshi Nikaido
  • Publication number: 20210206234
    Abstract: This on-board air conditioner control device (1) comprises: a PTC heater (H) which is contained in a high-voltage circuit (HV) and generates heat by means of power supplied from a high-voltage battery (B2); a micro-controller (10) which is contained in a low-voltage circuit (LV) and controls the power supplied to the PTC heater (H) from the high-voltage battery (B2); a current detection sensor (14) which is contained in the high-voltage circuit (HV) and outputs a voltage signal indicating a value for the current flowing through the PTC heater (H); a V/f conversion unit (162) which is contained in the high-voltage circuit (HV) and converts the voltage signal outputted by the current detection sensor (14) to a frequency signal; and a digital isolator (172) which transmits the frequency signal to the micro-controller (10) while preserving electrical insulation between the V/f conversion unit (162) and the micro-controller (10).
    Type: Application
    Filed: April 17, 2019
    Publication date: July 8, 2021
    Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Hidetaka SATO, Tomoyasu OSAKI, Keiji NAGASAKA, Ryota KOJIMA
  • Patent number: 11047605
    Abstract: An evaporator includes: a vessel having a refrigerant inlet for receiving a refrigerant at a lower part of the vessel, and a refrigerant outlet for discharging the refrigerant in an evaporated state at an upper part of the vessel; and a plurality of heat-transfer tubes disposed so as to extend inside the vessel along a longitudinal direction of the vessel, and configured to transfer heat received from a fluid flowing inside the heat-transfer tubes to the refrigerant flowing outside the heat-transfer tubes. The plurality of heat-transfer tubes are disposed so that at least one downward flow passage is defined through the plurality of heat-transfer tubes or around the plurality of heat-transfer tubes, the at least one downward flow passage having a width larger than a representative interval between the plurality of heat-transfer tubes.
    Type: Grant
    Filed: April 21, 2015
    Date of Patent: June 29, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Yoshiyuki Kondo, Takuo Oda, Yasushi Hasegawa, Naoya Miyoshi
  • Patent number: 11046145
    Abstract: An air conditioning damper includes a damper main body provided in a casing and closing a flow path formed in the casing by a distal end portion abutting against the inner surface of the casing. The air conditioning damper closes or opens the flow path by pivoting. The air conditioning damper has a cover portion provided on front surface sides or back surface sides of a plurality of protruding portions and extending in the width direction of the damper main body beyond a side surface of the protruding portion.
    Type: Grant
    Filed: December 6, 2017
    Date of Patent: June 29, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Satoshi Kominami, Takahide Yamamoto, Tsubasa Yamashita
  • Publication number: 20210190394
    Abstract: In order to reduce the effect on a compressor caused by foaming in an oil tank, a control unit for controlling an oil pump starts the oil pump before a compressor is started (SA1), starts the compressor (SA4) when an oil supply differential pressure P satisfies a compressor startup condition during a reference time Tas from the starting of the oil pump (“Yes” in SA3), and extends the operation of the oil pump for a prescribed time without starting the compressor (Step SA5) when the compressor startup condition is not satisfied (“No” in SA3).
    Type: Application
    Filed: October 12, 2018
    Publication date: June 24, 2021
    Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Yoshie TOGANO, Kenji UEDA, Yasushi HASEGAWA
  • Publication number: 20210180594
    Abstract: In the present invention, a fixed scroll (210A) comprises a lubricating oil introduction passage (40) that serves as a first passage for supplying, to the inside of a scroll compressor part (30), a lubricating oil located inside an oil separator that serves as a lubricating oil separation part. An orbiting scroll (210B) comprises a lubricating oil discharge passage (50) that serves as a second passage for discharging, to the outside of the scroll compressor part (30), the lubricating oil which has been introduced to the inside of the scroll compressor part (30).
    Type: Application
    Filed: November 26, 2018
    Publication date: June 17, 2021
    Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Katsuhiro FUJITA, Takayuki KUWAHARA
  • Publication number: 20210164480
    Abstract: A blower device and a vehicular air-conditioning device including a chamber for air flow so as to cool a motor, whereby water drops are prevented from reaching the motor with higher reliability. Included is a casing having an air intake port, an air discharge port, and a discharge flow path portion communicating between the air intake port and the air discharge port; a scroll fan provided in the casing to take in the air from the air intake port and generate an air flow to the air discharge port through the discharge flow path portion; a motor rotationally driving the scroll fan; and a motor cooling unit cooling the motor. The motor cooling unit includes a chamber for partial air flow from the discharge flow path portion and a cooling duct having an opening portion which opens into the chamber at one end and supplying air to the motor.
    Type: Application
    Filed: February 16, 2021
    Publication date: June 3, 2021
    Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Satoshi KOMINAMI, Tomoki NAKAMURA
  • Publication number: 20210156382
    Abstract: Provided is a tip seal that makes it possible to improve the durability of a tip seal installed on the tooth tip of a wall even when a continuously inclined section is provided to the wall. The tip seal is provided with: a tip seal inclined section (7A) installed in a groove section of a wall in which the height changes continuously in a spiral direction; and a tip seal flat section (7B) that is installed in a groove section of the wall in which the height is fixed in the spiral direction and that is adjacent to the tip seal inclined section (7A). A recess (8) is formed at a position away from the adjacent area between the tip seal inclined section (7A) and the tip seal flat section (7B).
    Type: Application
    Filed: June 21, 2018
    Publication date: May 27, 2021
    Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Hajime SATO, Yohei HOTTA, Yoshiyuki KIMATA, Takuma YAMASHITA
  • Publication number: 20210155080
    Abstract: A current estimating device that estimates a capacitor current of a high-voltage circuit for driving a motor, wherein the current estimating device calculates a voltage utilization rate using the input voltage of an inverter included in the high-voltage circuit and the speed of the motor, calculates a first constant by applying the voltage utilization rate to a predetermined first arithmetic expression, and calculates the capacitor current of an electrical condenser included in the high-voltage circuit by multiplying the first constant by a motor current effective value.
    Type: Application
    Filed: August 15, 2018
    Publication date: May 27, 2021
    Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Makoto HATTORI, Hiroyuki KAMITANI, Hiroto HIGUCHI, Masahiro MORI, Kyohei WATANABE
  • Patent number: 11015601
    Abstract: The present invention improves performance of a scroll fluid machine by effectively exhibiting a function of a tip seal installed at a tooth tip of a wall body even when a continuous slope is provided to the wall body. A slope in which the distance between opposing surfaces of opposing end plates continuously reduces from the outer peripheral surface toward the inner peripheral surface is provided, and a tip seal (7) that comes into contact with an opposing tooth bottom so as to seal a fluid is provided to a tip seal groove (3d) formed at a tooth tip of a wall body (3b) corresponding to the slope. A groove bottom (3d1) of the tip seal groove (3d) is formed into a shape in which the center portion (3d2) in the groove width direction deepest. The tip seal (7) is formed such that the center portion (7a1), in the width direction, of the bottom (7a) of the tip seal (7) facing the groove bottom (3d1) projects farther than both side portions (7a2).
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: May 25, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Hajime Sato, Yoshiyuki Kimata, Yohei Hotta
  • Publication number: 20210148361
    Abstract: A scroll compressor comprising a fixed scroll (15); an orbiting scroll (16) supported in a manner allowing for orbiting motion; a discharge port through which a fluid compressed by the two scrolls (15, 16) is discharged; an end plate step portion (16E) provided on an end plate of the orbiting scroll (16) formed so that a height of the end plate is higher on a center portion side in the direction of a spiral wrap and lower on an outer end side; and a wrap step portion (15E) provided on a wall portion of the fixed scroll (15) that corresponds to the end plate step portion (16E) so that a height of the wall portion is lower on the center portion side of the spiral and higher on the outer end side; wherein the orbiting scroll (16) is treated for surface hardening and the fixed scroll (15) is not treated for surface hardening.
    Type: Application
    Filed: January 27, 2021
    Publication date: May 20, 2021
    Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Hajime SATO, Makoto TAKEUCHI, Genta YOSHIKAWA, Kazuhide WATANABE, Katsuhiro FUJITA, Takayuki HAGITA, Takayuki KUWAHARA
  • Patent number: 11002274
    Abstract: Provided is a scroll fluid machine which can appropriately set a tip clearance between a tooth base and a tooth crest having an inclined portion and can achieve desired performance. An inclined portion in which a distance between opposing surfaces of an end plate of a fixed scroll and an end plate of an orbiting scroll facing each other gradually decreases from an outer peripheral side toward an inner peripheral side is provided. A tip clearance between a tooth crest of a wall of the orbiting scroll and a tooth base of the end plate of the fixed scroll facing the tooth crest at normal temperature is greater on the inner peripheral side than on the outer peripheral side.
    Type: Grant
    Filed: August 14, 2017
    Date of Patent: May 11, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Hajime Sato, Yoshiyuki Kimata, Takahide Ito
  • Publication number: 20210123644
    Abstract: An evaporator (2) is provided with a casing (5), a refrigerant supply section (7), a first heat transfer pipe group (10), and a second heat transfer pipe group (11). The first heat transfer pipe group (10) is disposed in the lower part of the space in the casing (5) so as to be immersed in the refrigerant and comprises a plurality of heat transfer pipes (12) through which liquid to be cooled flows. The second heat transfer pipe group (11) is provided in the space in the casing (5) at a position below the refrigerant supply section (7) and above the liquid level of the refrigerant, and comprises a plurality of second heat transfer pipes (13) through which liquid to be cooled flows.
    Type: Application
    Filed: December 4, 2018
    Publication date: April 29, 2021
    Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Taichi YOSHII, Yasutaka AOKI, Takeshi KANEKO
  • Publication number: 20210115943
    Abstract: A centrifugal compressor includes a rotary shaft; a hollow casing; a first-stage inlet guide vane; a first-stage impeller; a diffuser; a return flow channel; return vanes; a second-stage inlet guide vane; and a second-stage impeller. The return vanes are arranged at predetermined intervals in a circumferential direction of the rotary shaft and a vane angle of each return vane is changed in a region from a leading edge, at which the fluid is introduced, to a predetermined position and the vane angle is maintained constant in a region from the predetermined position to a trailing edge, at which the fluid is discharged, in terms of meridian plane distance in a direction from the leading edge to the trailing edge.
    Type: Application
    Filed: February 20, 2019
    Publication date: April 22, 2021
    Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Jun KOGA, Jyun MIYAMOTO
  • Patent number: D929553
    Type: Grant
    Filed: October 9, 2019
    Date of Patent: August 31, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Makoto Hattori, Hiroyuki Kamitani, Hiroto Higuchi, Takayuki Takashige
  • Patent number: D931347
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: September 21, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Hajime Sato, Yoshiyuki Kimata, Takahide Ito