[특허]Gas block device and gas block method

[미국특허] Gas block device and gas block method 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F17D-005/06
출원번호	US-0577684 (2005-10-20)
등록번호	US-8166999 (2012-05-01)
우선권정보	JP-P.2004-305336 (2004-10-20); JP-P.2004-305337 (2004-10-20)
국제출원번호	PCT/JP2005/019308 (2005-10-20)
§371/§102 date	20080110 (20080110)
국제공개번호	WO2006/043630 (2006-04-27)
발명자 / 주소	Ueki, Kouichi Sazawa, Shigetada Hamada, Kazutaka Namba, Mitsuo Hori, Fujio Kawashima, Sadamu Masuda, Isao Yamashita, Hisanori Asano, Kazutaka
출원인 / 주소	Panasonic Corporation
대리인 / 주소	Pearne & Gordon LLP
인용정보	피인용 횟수 : 4 인용 특허 : 23

초록 ▼

A use condition of gas equipment is monitored. An abnormality determination unit 26 determines whether or not a use flow volume obtained by detecting a flow velocity obtained by measuring a signal transfer time in a medium using a flow velocity detection unit 17 and converting the detected flow velocity into a flow volume using a flow volume calculation unit 25. When the shutoff unit 27 shuts off a fluid path 1 when it is determined that there is abnormality, a return signal is output from a return unit 28 to a shutoff unit 27 in order to use the gas again by opening the fluid path. Simultaneously, when a return time-counting unit 29 starts the time-counting operation, and then, a predetermined time period has been elapsed, the flow volume calculation unit 25 determines whether or not a predetermined flow volume of greater flows in order to identify whether or not all of the gas plugs of the gas equipment connected to the downstream of the gas shutoff apparatus 27 are closed. The leakage determination unit 30 determines that there is leakage when a predetermined flow volume or greater is detected, and a driving signal is output to the shutoff unit 27 to close the fluid path 1.

대표청구항 ▼

1. A gas shutoff apparatus, comprising: a flow velocity detection unit which detects a flow velocity by measuring a signal transfer time in a medium;a flow volume calculation unit which converts the flow velocity detected by the flow velocity detection unit into a flow volume;an abnormality determination unit which determines whether or not a use flow volume calculated by the flow volume calculation unit is normal;a shutoff unit which shuts off a fluid path through which the medium flows when the abnormality determination unit determines that there is abnormality;a return unit which outputs a return signal to the shutoff unit to open the fluid path;a return time-counting unit which starts a time-counting on the basis of a return operation of the return unit; anda leakage determination unit which defers performing a leakage determination based on a flow volume detected by the flow volume calculation unit until after the return time-counting unit counts that a predetermined time period has been elapsed from a time of starting the return operation of the return unit. 2. The gas shutoff apparatus according to claim 1, further comprising a return determination unit which determines whether or not the detected flow volume from the flow volume calculation unit after the return is within a predetermined flow volume and changes the predetermined time period to be counted by the return time-counting unit. 3. The gas shutoff apparatus according to claim 1, wherein the predetermined time period counted by the return time-counting unit is set based on a pipe length of a gas pipe between the shutoff unit and a gas equipment arranged downstream of the shutoff unit. 4. The gas shutoff apparatus according to claim 1, further comprising: a predetermined time period setting unit that sets the predetermined time period to be counted by the return time-counting unit. 5. A gas shutoff method, comprising: a flow velocity detection process for detecting a flow velocity by measuring a signal transfer time in a medium;a flow volume calculation process for converting the flow velocity detected in the flow velocity detection process into a flow volume;an abnormality determination process for determining whether or not a use flow volume calculated in the flow volume calculation process is normal;a shutoff process for shutting off a fluid path through which the medium flows when it is determined in the abnormality determination process that there is abnormality;a return process for outputting a return signal to open the fluid path;a return time-counting process for starting a time-counting on the basis of the return signal; anda leakage determination process for deferring performing a leakage determination based on a flow volume detected by the flow volume calculation process until after a predetermined time period has been elapsed from the start of the time-counting. 6. The gas shutoff method according to claim 5, further comprising: a flow volume determination process for determining whether or not the flow volume measured in the flow volume calculation process after the return is within a predetermined flow volume; anda return determination process for changing a setting of the predetermined time period counted in the return time-counting process. 7. The gas shutoff method according to claim 5, wherein the predetermined time period counted in the return time-counting process is set based on a pipe length of a gas pipe between a shutoff unit and a gas equipment arranged downstream of the shutoff unit. 8. The gas shutoff method according to claim 5, further comprising: a predetermined time period setting process for setting the predetermined time period to be counted in the return time-counting process.

이 특허에 인용된 특허 (23) 인용/피인용 타임라인 분석

Nicewonger Mark R. ; Clove John W., Apparatus for detecting opening in fluid flow passageway and shutting off flow in response thereto.
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Davis Dan, Automatic fluid flow shut-off device.
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Cochran David J. ; Cloud Forrest R., Automatic shut-off device for a pipe.
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McGill, James C.; Arduini, Douglas P., Emergency gas and electricity shutoff apparatus and control system.
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Isaacson ; Jr. Gary A. ; Nyenhuis Eric ; Nyenhuis James ; Simpkins ; Sr. Terry ; Simpkins ; Jr. Terry J., Flood control device.
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Simpkins ; Jr. Terry J., Flood control device.
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Namba Mitsuo (Machida JPX), Gas leak detection system.
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Nawa, Motoyuki; Iwanaga, Shigeru; Nanba, Mitsuo, Gas leak detection system.
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Nakane Shinichi (Yamatokouriyama JPX) Uno Takashi (Nara JPX) Asano Kazutaka (Nara JPX), Gas shutoff apparatus.
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Nakane Shinichi (Yamatokouriyama JPX) Uno Takashi (Nara JPX) Horii Hiroshi (Kashihara JPX) Kato Shinzo (Tokyo JPX) Mitsuo Namba (Machida JPX) Reppei Uematsu (Yokohama JPX), Gas shutoff apparatus.
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Nakane Shinichi (Yamatokouriyama JPX) Uno Takashi (Nara JPX) Horii Hiroshi (Katsushika JPX) Kato Shinzo (Katsushika JPX) Namba Mitsuo (Machida JPX) Uematsu Reppei (Yokohama JPX), Gas shutoff apparatus.
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Ito,Nobuo, Leak-detecting check valve, and leak-detection alarm system that uses said check valve.
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Hsieh, Tsung-Chi, Liquid supply or drain pipe equipped with a leakage detector.
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Miyauchi Shinji (Nara-ken JPX) Nakane Shinichi (Yamatokoriyama JPX) Asano Kazutaka (Nara-ken JPX) Horiike Yoshio (Katano JPX) Tsuboi Makoto (Nara JPX), Method and apparatus for detecting abnormality in gas supply equipment.
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Nicewonger Mark R. ; Yiu Tommy K., Method for detecting opening in fluid flow passageway and shutting off flow in response thereto.
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Caise Robert F. ; Worthy ; III Howard G. ; Senkevich William J., Microprocessor controled water shut-off device.
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Kimata Kunio,JPX ; Ueda Yasukiyo,JPX ; Nakane Shinichi,JPX ; Namba Mitsuo,JPX, Piping leakage detecting apparatus.
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Kushner Nicholas D., System and method for controlling the unwanted flow of water through a water supply line.
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Bouzaglou David (11044 Burbank Blvd. N. Hollywood CA 90601), Waste line stoppage detector and automatic water shutoff system.
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Genova Perry A. ; Giallo Joseph ; Wakefield Keith, Water flow sensing device.
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Tornay,Paul G., Water leak detection and prevention systems and methods.
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Price Stephen Jeffrey, Water shut-off valve and leak detection system.
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Luker John, Waterflow monitoring device.
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이 특허를 인용한 특허 (4) 인용/피인용 타임라인 분석

Older, John, Flow control/shut-off valve assembly.
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Older, John; Farouk, Bakhtier; Jones, La'Shell; Kern, Jared; Scholl, Matthew, Flow control/shut-off valve assembly.
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Iwamoto, Ryuji; Miyata, Hajime; Itou, Youichi; Bessyo, Daisuke; Kamon, Kenichi, Flowmeter.
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Honda, Tsuyoshi; Ootani, Takuhisa; Murase, Kouji, Gas shutoff device.
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[미국특허] Gas block device and gas block method 원문보기