Patents Assigned to Hochiki Corporation
  • Patent number: 11975228
    Abstract: A fire detection apparatus 1A includes a heat detection unit 110A provided such that a part of the heat detection unit 110A is accommodated in an outer cover 20A and another part of the heat detection unit 110A is exposed to an outside of the fire detection apparatus 1A through an insertion hole 120A formed in a top surface portion 22A, and a guard portion 130A which is provided to cover a periphery of the insertion hole 120A and another part of the heat detection unit 110A in the top surface portion 22A and has a plurality of ribs, in which a material of a rib corresponding to a first guard side rib 131A among the plurality of ribs is made different from a material of some other ribs, or a shape of the first guard side rib 131A among the plurality of ribs is made different from a shape of some other ribs.
    Type: Grant
    Filed: September 26, 2020
    Date of Patent: May 7, 2024
    Assignee: HOCHIKI Corporation
    Inventors: Yasuharu Fujiwara, Isao Saeki, Hideki Takano
  • Patent number: 11911785
    Abstract: An electrostatic atomizing apparatus includes: a liquid nozzle portion for releasing a liquid column into an open space; a liquid conduit portion for introducing pressurized liquid into the liquid nozzle portion; a liquid-side electrode disposed inside the liquid conduit portion for coming into contact with the pressurized liquid; a gas conduit portion made of an insulation material and having a gas nozzle portion disposed around the liquid nozzle portion for converting the liquid column into fine particles to generate an atomized stream by making a gas stream from the gas nozzle portion act at an atomization point of the liquid column released into the open space from the liquid nozzle portion; and a ring-shaped induction electrode disposed around the atomization point located in the open space and having an electrode conductor made of a conductive material and coated with an insulation material.
    Type: Grant
    Filed: June 9, 2021
    Date of Patent: February 27, 2024
    Assignee: HOCHIKI CORPORATION
    Inventors: Toshihide Tsuji, Tetsuo Yoshida
  • Patent number: 11761890
    Abstract: An occurrence space 32A which is provided in a light shielding space 3A shielded from light from an outside and into which a detection target flows, a first light emitting unit 61A and a second light emitting unit that emit detection light along a first light emitting-side optical axis 611A and a second light emitting-side optical axis toward an occurrence space 32A, a light receiving unit that receives scattered light generated when detection light emitted from the first light emitting unit 61A and the second light emitting unit is scattered by a detection target flowing into the occurrence space 32A along a light receiving-side optical axis intersecting the first light emitting-side optical axis 611A and the second light emitting-side optical axis, and a smoke detection unit cover-side inclined portion 43A that primarily reflects the detection light emitted from the first light emitting unit 61A and the second light emitting unit in a direction intersecting a plane defined by the first light emitting-side o
    Type: Grant
    Filed: January 22, 2021
    Date of Patent: September 19, 2023
    Assignee: HOCHIKI CORPORATION
    Inventors: Tomohiko Shimadzu, Keisuke Washizu, Manabu Dohi, Yasuharu Fujiwara, Hideki Takano
  • Patent number: 11698340
    Abstract: A fire detection apparatus 1 includes a first light emitting unit 101 that irradiates a detection space located inside or outside the fire detection apparatus 1 with first detection light, a second light emitting unit 102 that irradiates the detection space with second detection light having a different wavelength from a wavelength of the first detection light, a light receiving unit 103 that receives scattered light of the first detection light irradiated from the first light emitting unit 101 due to smoke, outputs a first light receiving signal according to the received scattered light, receives scattered light of the second detection light irradiated from the second light emitting unit 102 with respect to smoke, and outputs a second light receiving signal according to the received scattered light, and an identification unit 107a that identifies a type of smoke present in the detection space on the basis of an output ratio of an output value of the first light receiving signal to an output value of the seco
    Type: Grant
    Filed: September 26, 2020
    Date of Patent: July 11, 2023
    Assignee: Hochiki Corporation
    Inventors: Manabu Dohi, Tomohiko Shimadzu, Keisuke Washizu
  • Patent number: 11694532
    Abstract: A photoelectric smoke detector (14) connected to a signal line (12-1) drawn into a warning area from a receiver (10) transmits a fire signal including identification information of smoke caused in detection zones Z1 and Z2. In the detection zones, a sensor (18) for sensing a change of physical phenomenon other than smoke involved in fire is provided, and the sensor (18) is connected to the signal line (12-1) via a relay device (16). The sensor (18) is at least one of a CO2 sensor, a CO sensor, a fire sensor, and a heat sensor. A fire alarm control unit (48) of the receiver (10) causes an alarm to be given, when determining the identification information of the smoke by the photoelectric smoke detector (14) and a sensing value by at least one of the CO2 sensor, the CO sensor, the fire sensor, and the heat sensor.
    Type: Grant
    Filed: July 22, 2021
    Date of Patent: July 4, 2023
    Assignee: HOCHIKI CORPORATION
    Inventor: Tetsuya Nagashima
  • Patent number: 11614396
    Abstract: A fire detection apparatus 1A includes a detector cover 70A for inhibiting ambient light from entering a detection space 60A, an inner cover 30A that accommodates the detection space 60A and the detector cover 70A, an outer cover 20A that accommodates the inner cover 30A, a first opening 30aA provided in a side portion on an opposite side from a side portion on an installation surface side among side portions of the inner cover 30A, a second opening provided in a side portion on an opposite side from a side portion on an installation surface among side portions of the detector cover 70A, and a flat plate-shaped insect screen 50A provided on the detector cover 70A and configured to substantially cover the entire second opening.
    Type: Grant
    Filed: October 23, 2020
    Date of Patent: March 28, 2023
    Assignee: Hochiki Corporation
    Inventors: Hideki Takano, Yasuharu Fujiwara, Isao Saeki
  • Patent number: 11501631
    Abstract: A fire detector is connected to a loop transmission line connected to a receiver. When the loop transmission line is normal, a transmission unit is connected to the fire detector. When a disconnection failure occurs, a disconnection monitoring unit turns on switching circuits to connect the end of the loop transmission line to the transmission unit, and the receiver connects to the fire detector from both ends of the loop transmission line. An input/output switching booster is inserted and connected in the middle of the loop transmission line, and when the start side transmission line is disconnected and the switching circuits are turned on, the input/output is switched. Accordingly, the input/output switching booster amplifies the down signal input from the terminal side transmission line and outputs it to the start side transmission line and at the same time amplifies the up signal input from the start side transmission line.
    Type: Grant
    Filed: May 26, 2021
    Date of Patent: November 15, 2022
    Assignee: HOCHIKI CORPORATION
    Inventors: Yoshihiro Matsuda, Shigeru Kaneko, Takehiro Ono, Akira Ishida
  • Patent number: 11454582
    Abstract: Provided is a detector 100 attached to an installation surface 900 of a ceiling, the detector 100 having an attachment surface 11 facing the installation surface 900, in which the detector 100 includes a light shielding space 3 into which smoke flows, a light emitting unit 61 and a light receiving unit 62 that detects smoke flowing into the light shielding space 3, an outer cover 2 that accommodates the light emitting unit 61, the light receiving unit 62, and the light shielding space 3, an outer cover-side inner side inflow/outflow opening 212 and an outer cover-side outer side inflow/outflow opening 213 that allow gas containing smoke to flow into and flow out of the light shielding space 3, the outer cover-side inner side inflow/outflow opening 212 and the outer cover-side outer side inflow/outflow opening 213 being provided toward an opposite side from the attachment surface 11 in the outer cover 2 with reference to a direction substantially orthogonal to the attachment surface 11, and a main body-side in
    Type: Grant
    Filed: October 5, 2020
    Date of Patent: September 27, 2022
    Assignee: Hochiki Corporation
    Inventors: Keisuke Washizu, Tomohiko Shimadzu, Manabu Dohi
  • Patent number: 11393312
    Abstract: A smoke detection device main body of a portable smoke detector can switch smoke detection sensitivity. At the start of operation, the smoke detection sensitivity of the portable smoke detector is equal to or higher than a smoke detection sensitivity of a fixed smoke detector that detects smoke in a monitoring area. At this time, switching of smoke detection sensitivity does not work. After the fixed smoke detector detects smoke generation, when the portable smoke detector is used to locate the smoke generation position while moving in the monitoring area, an operation is performed from an initial sensitivity. When a predetermined smoke detection signal is detected while using the portable smoke detector to identify the smoke generation position, the smoke detection sensitivity switching is activated, and the smoke detection sensitivity is changed accordingly. By lowering the smoke detection sensitivity, the smoke generation position is narrowed down and identified.
    Type: Grant
    Filed: October 6, 2020
    Date of Patent: July 19, 2022
    Assignee: HOCHIKI CORPORATION
    Inventor: Hidenari Matsukuma
  • Patent number: 11385211
    Abstract: To provide a detector capable of reliably inducing a gas containing a detection target to a detection space.
    Type: Grant
    Filed: April 5, 2019
    Date of Patent: July 12, 2022
    Assignee: HOCHIKI CORPORATION
    Inventor: Manabu Dohi
  • Patent number: 11059059
    Abstract: An electrostatic atomizing apparatus includes: a liquid nozzle portion for releasing a liquid column into an open space; a liquid conduit portion for introducing pressurized liquid into the liquid nozzle portion; a liquid-side electrode disposed inside the liquid conduit portion for coming into contact with the pressurized liquid; a gas conduit portion made of an insulation material and having a gas nozzle portion disposed around the liquid nozzle portion for converting the liquid column into fine particles to generate an atomized stream by making a gas stream from the gas nozzle portion act at an atomization point of the liquid column released into the open space from the liquid nozzle portion; and a ring-shaped induction electrode disposed around the atomization point located in the open space and having an electrode conductor made of a conductive material and coated with an insulation material.
    Type: Grant
    Filed: January 15, 2019
    Date of Patent: July 13, 2021
    Assignee: HOCHIKI CORPORATION
    Inventors: Toshihide Tsuji, Tetsuo Yoshida
  • Patent number: 11043109
    Abstract: A fire detector is connected to a loop transmission path connected to a receiver. When the loop transmission path is normal, a communication connection is made from a transmitting unit to the fire detector to monitor fire. When a break fault occurs in the loop transmission path, a break monitoring control unit turns switching circuit units ON to connect a termination of the loop transmission path to the transmitting unit. To the loop transmission path, a relay detects a current normal direction at normal and a current reverse direction at the time of occurrence of a break for transmission to the receiver. When a break occurs in the loop transmission path, a break section determining unit of the receiver determines, as a break section, a section in which the current normal direction detected by a plurality of the relays is changed to the current reverse direction.
    Type: Grant
    Filed: February 20, 2020
    Date of Patent: June 22, 2021
    Assignee: HOCHIKI CORPORATION
    Inventors: Yoshihiro Matsuda, Shigeru Kaneko, Takehiro Ono, Akira Ishida
  • Patent number: 10950113
    Abstract: A detection unit that detects smoke contained in a gas by radiating detection light toward a detection space for detecting smoke, and an inner labyrinth for inhibiting ambient light from entering the detection space, the inner labyrinth being provided to cover an outer edge of the detection space are included, the detection unit includes a light emitting unit that radiates the detection light and a light receiving unit that receives the detection light radiated by the light emitting unit, and at least a part of a side surface of the inner labyrinth on a side of the detection space is formed in a flat shape capable of inhibiting the detection light reflected by the inner labyrinth from entering a field of view RV of the light receiving unit in the detection space.
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: March 16, 2021
    Assignee: Hochiki Corporation
    Inventor: Tomohiko Shimadzu
  • Patent number: 10943453
    Abstract: A light shielding section for inhibiting ambient light from entering a detection space 34 for detecting smoke contained in a gas is included, the light shielding section includes an inner labyrinth 36 that covers an outer edge of the detection space 34 and has a first inner inflow opening 36f, a detector body 4 disposed at a position facing the first inner inflow opening 36f, the position being separated from the first inner inflow opening 36f by a first gap 38, and an outer labyrinth 37 disposed at a position separated from the first gap 38 by a second gap 39 on an imaginary line orthogonal to a direction in which the first inner inflow opening 36f and the detector body 4 face each other, the imaginary line passing through the first gap 38, and the gas outside the light shielding section is allowed to flow into the detection space 34 through the second gap 39, the first gap 38, and the first inner inflow opening 36f in order.
    Type: Grant
    Filed: November 14, 2019
    Date of Patent: March 9, 2021
    Assignee: Hochiki Corporation
    Inventor: Tomohiko Shimadzu
  • Patent number: 10854062
    Abstract: A monitor image in a monitor region captured by a monitor camera is divided into a plurality of block images, which are inputted to a fire detector constituted by a multi-layer-type neural network so as to detect a fire. A learning image generation device divides a learning image in which a fire in the monitor region is captured into a plurality of block images and classifies the images to fire learning block images, normal learning block images, or non-learning block images based upon the presence/absence of flames and smoke and the ratio at which the flames and smoke occupy in each block image so as to be stored, and a learning control part inputs the fire learning block images and the normal learning block images stored in the learning image generation device to the fire detector so as to subject a multi-layer-type neural network to learning by deep learning process.
    Type: Grant
    Filed: May 14, 2019
    Date of Patent: December 1, 2020
    Assignee: HOCHIKI CORPORATION
    Inventor: Hiromichi Ebata
  • Patent number: D904215
    Type: Grant
    Filed: May 13, 2019
    Date of Patent: December 8, 2020
    Assignee: HOCHIKI CORPORATION
    Inventors: Masashi Arikawa, Hayato Tsurumi
  • Patent number: D908519
    Type: Grant
    Filed: August 10, 2020
    Date of Patent: January 26, 2021
    Assignee: HOCHIKI CORPORATION
    Inventors: Tomohiko Shimazu, Manabu Dohi, Keisuke Washizu
  • Patent number: D918753
    Type: Grant
    Filed: March 4, 2019
    Date of Patent: May 11, 2021
    Assignee: HOCHIKI CORPORATION
    Inventors: Isao Saeki, Yasuharu Fujiwara
  • Patent number: D1034263
    Type: Grant
    Filed: January 23, 2023
    Date of Patent: July 9, 2024
    Assignee: HOCHIKI CORPORATION
    Inventors: Keisuke Washizu, Hiroki Masuzawa
  • Patent number: D1034264
    Type: Grant
    Filed: January 23, 2023
    Date of Patent: July 9, 2024
    Assignee: HOCHIKI CORPORATION
    Inventors: Keisuke Washizu, Hiroki Masuzawa