WO2022210257A1 - 煙感知器 - Google Patents

煙感知器 Download PDF

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Publication number
WO2022210257A1
WO2022210257A1 PCT/JP2022/013942 JP2022013942W WO2022210257A1 WO 2022210257 A1 WO2022210257 A1 WO 2022210257A1 JP 2022013942 W JP2022013942 W JP 2022013942W WO 2022210257 A1 WO2022210257 A1 WO 2022210257A1
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WO
WIPO (PCT)
Prior art keywords
filter
smoke
attachment
switch
detachment
Prior art date
Application number
PCT/JP2022/013942
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English (en)
French (fr)
Japanese (ja)
Inventor
義裕 熊倉
啓 磯貝
Original Assignee
能美防災株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 能美防災株式会社 filed Critical 能美防災株式会社
Priority to JP2023511118A priority Critical patent/JPWO2022210257A1/ja
Priority to CN202280024346.8A priority patent/CN117136393A/zh
Publication of WO2022210257A1 publication Critical patent/WO2022210257A1/ja

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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device
    • G08B17/107—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device for detecting light-scattering due to smoke

Definitions

  • the present invention relates to technology for sensing smoke.
  • smoke detectors that detect the generation of smoke in an external space by detecting particles contained in the air that flows into the sensing area from the external space.
  • a smoke sensor called a photoelectric smoke sensor emits light from a light emitting element into a sensing area, and the light is scattered by particles in the air within the sensing area. Based on the intensity of light received and measured by the sensor, particles contained in the air flowing from the external space into the sensing area are sensed, thereby sensing the generation of smoke in the external space.
  • Patent Document 1 is an example of a patent document that discloses technology related to photoelectric smoke detectors.
  • the photoelectric smoke sensor described in Patent Document 1 when non-smoke particles such as steam flow into the smoke detection space (sensing area) and when smoke flows into the smoke detection space, the output signal of the light receiving element
  • an invention has been proposed in which the output signal output from the light receiving element is delayed by a predetermined delay time, thereby avoiding the inconvenience of erroneously sensing smoke due to the generation of steam or the like. ing.
  • the filter equipped with the smoke detector becomes clogged with dust. If the degree of clogging exceeds the limit, a sufficient flow rate of air will not flow from the external space to the sensing area, and even if smoke is generated in the external space, there is a danger that the smoke detector will not be able to detect the smoke quickly. have a nature.
  • smoke detector filters are often set to have a usable time that is sufficiently shorter than the time required for clogging to reach the limit from the start of use under normal usage environments. In that case, after the filter is started to be used, the maintenance personnel must replace the filter before the usable time elapses.
  • usage time a smoke detector with a function that continuously measures the elapsed time from the start of use of the filter (hereinafter referred to as "usage time") so that maintenance personnel can always check when to replace the filter.
  • Many of such smoke detectors are equipped with an operator that allows maintenance personnel to reset the time of use. The usage time measured until then is reset to zero, and then the elapsed time from the timing when a predetermined operation is performed is continuously measured as the usage time.
  • reset button the operator for resetting the clock of the filter's usage time by maintenance personnel will be referred to as a "reset button", but the type of operator is not necessarily limited to the button.
  • maintenance personnel may touch the reset button unintentionally when replacing or inspecting parts other than filters. As a result, if the filter usage time clocked by the smoke sensor is reset, maintenance personnel will not be able to know the correct filter replacement timing.
  • the present invention provides a smoke sensor that reduces the risk of the user accidentally resetting the filter usage time.
  • the present invention provides a smoke sensor that senses the generation of smoke in an external space by sensing particles contained in air flowing into the sensing area from an external space, the sensing area comprising: A detachable filter that is arranged on a flow path of air flowing into the air and traps dust contained in the air;
  • a smoke sensor is proposed that includes an operator arranged at a position where the operator cannot operate, and a timer means for measuring elapsed time after the operator accepts a predetermined operation.
  • the operation element is not erroneously operated by the user, so there is little risk of erroneously resetting the time measurement of the filter's usage time.
  • the figure which showed the structure of the smoke sensing system which concerns on one Embodiment The figure which showed typically the structure of the smoke sensor which concerns on one Embodiment.
  • the figure which showed typically the structure of an example of the smoke sensor which concerns on a modification The figure which showed typically the structure of an example of the smoke sensor which concerns on a modification.
  • FIG. 1 is a diagram showing the configuration of a smoke sensing system 1. As shown in FIG. A smoke sensing system 1 includes a smoke sensor 11 and a host system 12 .
  • the smoke detector 11 is placed in a space to be monitored for smoke generation (hereinafter referred to as a “monitored space”), takes in air in the monitored space, and detects smoke if the taken-in air contains smoke. , is a device that transmits an alarm of smoke generation to the host system 12 when smoke is detected.
  • the number of smoke sensors 11 provided in the smoke detection system 1 is one, but the number of smoke sensors 11 provided in the smoke detection system 1 varies according to the number and size of the monitored spaces.
  • the host system 12 may be a maintenance terminal device, a monitoring terminal device, a smoke alarm panel, a central monitoring system, or the like.
  • the host system 12 and the smoke sensor 11 are capable of data communication with each other via a wired, wireless, or mixed communication medium.
  • the host system 12 is a maintenance terminal device
  • a user such as a maintenance worker temporarily connects the host system 12 (maintenance terminal device) and the smoke sensor 11 wirelessly or by a communication cable when performing maintenance work on the smoke sensor 11.
  • the data stored in the smoke sensor 11 and the data generated by the smoke sensor 11 can be checked on the display of the host system 12 (maintenance terminal device).
  • the host system 12 is the same as the host system according to the prior art, so its description is omitted.
  • FIG. 2 is a diagram (viewed from above) schematically showing the configuration of the smoke sensor 11. As shown in FIG. Note that FIG. 2 shows a state in which the wall portion covering the upper surface of the housing of the smoke sensor 11 is removed for the sake of convenience in order to show the components arranged in the housing of the smoke sensor 11. (The same applies to FIGS. 6 to 8).
  • FIG. 2(a) schematically shows the smoke sensor 11 with the filter 114 attached (hereinafter referred to as the "attached state”) and the cover 1102 closed (hereinafter referred to as the "closed state”).
  • FIG. 2B schematically shows the smoke sensor 11 with the filter 114 removed (hereinafter referred to as "detached state”) and the cover 1102 opened (hereinafter referred to as "open state”). clearly shown.
  • the smoke sensor 11 includes a housing 110, a light emitting section 111, a light receiving section 112, a fan 113, a filter 114, a switch 115, a switch 116, and a control unit 117.
  • the housing 110 is a container that forms a space inside.
  • the housing 110 has a partition plate 1101 that divides the internal space into a sensing area S1 that is an area for sensing smoke and a housing area S2 that houses the control unit 117 .
  • the walls forming the sensing area S1 are provided with an air inlet P, which is an opening that functions as an inlet for air to flow from the external space to the internal space, and an air inlet P from the internal space to the external space.
  • An exhaust port Q which is an opening that functions as an outlet for the flow of the gas, is provided.
  • a part of the wall of the housing 110 is a cover 1102 that can be opened and closed. A worker opens the cover 1102 and inspects, replaces, etc. parts inside the smoke sensor 11 .
  • the air inlet P is provided in the cover 1102, but the air inlet P may be provided in a wall portion of the housing 110 other than the cover 1102. FIG.
  • the light emitting unit 111 has an LED, for example, and emits light from the LED under the control of the control unit 117 .
  • the light emitted by the light emitting unit 111 is light for sensing smoke within the sensing region S1.
  • the light-emitting portion 111 emits light toward an air flow path from the intake port P to the exhaust port Q. As shown in FIG.
  • the light-emitting portion 111 is arranged at a position not facing the light-receiving portion 112 so that the emitted light does not directly enter the light-receiving portion 112 .
  • the light-receiving unit 112 has, for example, a photodiode, receives a part of the light emitted from the light-emitting unit 111 and scattered by particles in the sensing region S1, and outputs a light intensity signal indicating the intensity of the received light. Output to the control unit 117 .
  • the fan 113 operates under the control of the control unit 117, and by means of rotating blades, creates a flow of air from the exterior space through the air inlet P into the sensing area S1 and out through the air outlet Q to the exterior space. play a role.
  • the filter 114 includes a tubular casing and a filter main body arranged within the casing.
  • the filter 114 is arranged on the air flow path from the intake port P to the exhaust port Q, and the filter main body catches dust contained in the air flowing from the external space to the sensing area S1 and prevents the dust from entering the sensing area S1.
  • the cover 1102 is an openable/closable cover that separates the housing space for housing the filter 114 (in this case, the space between the fan 113 and the cover 1102) from the outside, and maintains the filter 114 in the closed state. Thus, it plays a role of causing the filter 114 to exhibit its function.
  • the switch 115 (an example of an operator) is an operator that receives a predetermined operation by the user for resetting the clocking of the usage time of the filter.
  • the switch 115 is arranged in the accommodation space that accommodates the filter 114 (in this case, the space between the fan 113 and the cover 1102). Also, the switch 115 is arranged at a position covered by the filter 114 (filter main body).
  • the switch 115 has a button 1151 biased outward (to the right in the example of FIG. 2).
  • the switch 115 outputs an ON signal to the control unit 117 while the button 1151 is pressed by the user, and outputs an OFF signal to the control unit 117 while the button 1151 is not pressed by the user.
  • the ON signal and the OFF signal are collectively referred to as an operation signal.
  • the switch 116 (an example of attachment/detachment detection means) is a component that plays a role of detecting attachment/detachment of the filter 114, that is, an attached state and an unattached state.
  • Switch 116 has a button 1161 biased in a direction toward filter 114 (downward in the example of FIG. 2).
  • the switch 116 outputs an on signal to the control unit 117 while the filter 114 is in the on state and the button 1161 is pressed, and controls the off signal while the filter 114 is in the off state and the button 1161 is not pressed.
  • Output to unit 117 Hereinafter, the incoming signal and the outgoing signal are collectively referred to as the outgoing signal.
  • the control unit 117 is a device that controls the operation of the smoke sensor 11, etc.
  • the hardware of the control unit 117 is, for example, a computer, and the control unit 117 is realized by the computer performing processing according to the program for the control unit 117 .
  • FIG. 3 is a diagram showing the configuration of the computer 10 employed as hardware for the control unit 117.
  • the computer 10 includes a processor 101 that performs various data processing, a memory 102 that stores various data, an input/output interface 103 that exchanges signals with components such as the light emitting unit 111 included in the smoke sensor 11, and an external device. (In this case, the host system 12) is provided with a communication interface 104 for transmitting and receiving data.
  • FIG. 4 is a diagram showing the functional configuration of the control unit 117. As shown in FIG. That is, the computer 10 performs processing according to the program for the control unit 117, thereby realizing the control unit 117 having the components shown in FIG. The functional components included in the control unit 117 will be described below.
  • the light emission instructing means 1171 instructs the light emitting section 111 to emit light.
  • the light emission instructing means 1171 instructs the light emitting section 111 to emit light every time a predetermined time elapses, for example, while the smoke sensor 11 is operating.
  • the light intensity signal acquisition means 1172 acquires the light intensity signal output from the light receiving section 112 .
  • the smoke determining means 1173 determines whether or not the intensity of light indicated by the light intensity signal acquired by the light intensity signal acquiring means 1172 satisfies a predetermined condition for smoke detection. Determine if there is smoke in the air.
  • the predetermined condition for smoke detection is, for example, a condition in which the light intensity signal remains within a reference range indicating the presence of smoke for a predetermined period of time or longer.
  • the smoke determining means 1173 determines that smoke exists, it generates smoke generation notification data for notifying the generation of smoke.
  • the smoke generation notification data generated by the smoke determination means 1173 is transmitted to the host system 12 by the communication means 1177 .
  • the light emission instructing means 1171, the light emitting section 111, the light receiving section 112, the light intensity signal acquiring means 1172, and the smoke determining means 1173 sense particles in the air within the sensing area S1, and sense smoke based on the sensing results. constitute a sensing means;
  • the operation signal acquisition means 1174 acquires the operation signal from the switch 115 .
  • the attachment/detachment signal acquisition means 1175 acquires the attachment/detachment signal from the switch 116 .
  • the timer 1176 continuously measures the time elapsed after a predetermined operation for resetting the switch 115 is performed as the filter usage time. and generate usage time data indicating the measured usage time.
  • the communication means 1177 transmits and receives various data to and from the host system 12 .
  • the communication means 1177 transmits the smoke occurrence notification data generated by the smoke determination means 1173 to the host system 12 as described above. Further, the communication means 1177 transmits the latest usage time data generated by the clock means 1176 to the host system 12 in response to a request from the host system 12, for example.
  • the host system 12 is a central monitoring system
  • a user for example, an administrator of the smoke detection system 1
  • a user may request that the maintenance terminal device temporarily connected to the smoke sensor 11 detect smoke during maintenance work.
  • the maintenance terminal device By checking the usage time data of the filter received from the device 11 on the display of the maintenance terminal device or the like, it is possible to easily know when the filter 114 should be replaced.
  • the timer 1176 continuously measures the elapsed time after the predetermined operation for resetting the switch 115 is performed as the filter usage time.
  • the predetermined operation for resetting is, for example, an operation (long press) that keeps pressing the button 1151 for a predetermined time (for example, 3 seconds) or longer, presses the button 1151 twice within a predetermined time (for example, 1 second), Any operation that is unlikely to be unintentionally performed by the user, such as a pressing operation (double-pressing), may be adopted.
  • the clock means 1176 is configured so that the filter 114 is removed by the switch 116 (an example of the attachment/detachment detection means) in order to further reduce the risk of the user unintentionally resetting the clock of the filter usage time.
  • the switch 116 an example of the attachment/detachment detection means
  • the clocking of the filter usage time is reset, and the elapsed time after that is counted as a new filter usage time.
  • FIG. 5 is a diagram illustrating the flow of processing performed by the clock means 1176 when the user operates the switch 115 and the operation signal acquisition means 1174 starts acquiring an ON signal from the switch 115.
  • FIG. 5 exemplifies a case where the predetermined operation for resetting is a long press.
  • the timing means 1176 detects that the operation signal continuously received from the switch 115 via the operation signal obtaining means 1174 has changed from the OFF signal to the ON signal, first, the switch 116 is detected via the attachment/detachment signal obtaining means 1175 . It is determined whether or not the attachment/detachment signal continuously received from is a detachment signal (step S101).
  • step S101 determines in step S101 that no signal has been received (step S101; No), and terminates the series of processes shown in FIG.
  • step S101 determines in step S101 that it has received the de-signal (step S101; Yes).
  • step S102 determines whether or not the operation signal received from the switch 115 via the operation signal acquisition unit 1174 is an ON signal (step S102).
  • step S102 determines in step S102 that the ON signal has not been received (step S102; No), and performs the series of processes shown in FIG. finish.
  • the switch 115 outputs an ON signal.
  • the timer 1176 determines in step S102 that it has received the ON signal (step S102; Yes).
  • the timer 1176 determines whether or not a predetermined time has passed since the start of the processing according to the flow of FIG. 5, that is, the timing at which the operation signal changes from the OFF signal to the ON signal (step S103).
  • the predetermined time is the time (for example, two seconds) during which the button 1151 is continuously pressed for resetting.
  • step S103 If it is determined in step S103 that the predetermined time has not passed (step S103; No), the timer 1176 repeats the determination in step S103 at sufficiently short time intervals. On the other hand, when it is determined that the predetermined time has elapsed in step S103 (step S103; Yes), the clocking means 1176 resets the continuously clocked filter usage time to zero (step S104), and the filter is reset to zero (step S104). End a series of processes.
  • the user accidentally touches the switch 115, which causes the inconvenience that the filter usage time continuously measured by the smoke sensor 11 is unintentionally reset. Hateful.
  • the switch 115 is arranged at a position covered by the filter 114 (filter main body). Alternatively, switch 115 may be placed at a position not covered by filter 114 .
  • FIG. 7 is a diagram schematically showing a configuration example of the smoke sensor 11 in which the switch 115 is not covered with the filter 114 but is arranged within the accommodation space in which the filter 114 is accommodated.
  • the accommodation space in which the filter 114 is accommodated is narrow, so if the switch 115 is arranged in the accommodation space, the user can substantially operate the switch 115 with the filter 114 attached. can't Therefore, it is difficult for the user to unintentionally touch the switch 115 to reset the usage time of the filter.
  • FIG. 8 is a diagram schematically showing a configuration example of the smoke sensor 11 in which the switch 115 is arranged outside the housing space housing the filter 114. As shown in FIG. In smoke sensor 11 of FIG. 8, filter 114 is removed with cover 1102 opened, and switch 115 is positioned so that it can be operated by the user when fan 113 is removed. Even in the smoke sensor 11 configured as shown in FIG. 8, it is difficult for the user to unintentionally reset the usage time of the filter.
  • the smoke detector 11 does not reset the usage time of the filter even if the switch 115 is operated in a predetermined manner, unless the switch 116 outputs the off signal.
  • the smoke detector 11 may reset the filter usage time only in response to the operation signal output from the switch 115 without considering the attachment/detachment signal output from the switch 116 . Even in that case, unless the user is in a state in which the filter 114 is removed, the user cannot operate the switch 115, and the user unintentionally touches the switch 115 to reset the usage time of the filter. It is difficult to cause the inconvenience of being stuck.
  • attachment/detachment of the filter 114 is detected directly by the switch 116 .
  • a configuration may be adopted in which attachment/detachment of the filter 114 is indirectly detected.
  • FIG. 6 is a diagram schematically showing an example configuration of the smoke sensor 11 according to such a modification.
  • the smoke sensor 11 shown in FIG. 6 does not directly detect the attachment and detachment of the filter 114 by the switch 116, but indirectly detects the attachment and detachment of the filter 114 by detecting the opening and closing of the cover 1102 covering the filter 114. This is different from the smoke sensor 11 according to the embodiment described above.
  • the button 1161 of the switch 116 is biased in the direction toward the cover 1102 . Then, switch 116 outputs an incoming signal to control unit 117 indicating that filter 114 is firmly held at a predetermined position by cover 1102 while cover 1102 is closed and button 1161 is pressed. . On the other hand, while the cover 1102 is in the open state and the button 1161 is not pressed, the switch 116 is a dead signal indicating that the filter 114 is not held by the cover 1102 and the filter 114 may be out of the predetermined position. to the control unit 117 .
  • the switch 116 detects the open state of the cover 1102 as the state in which the filter 114 is removed, and detects the closed state of the cover 1102 as the state in which the filter 114 is attached. detected as
  • the switch 116 is used as attachment/detachment detection means for detecting attachment/detachment of the filter 114 .
  • the type of attachment/detachment detection means for detecting attachment/detachment of the filter 114 is not limited to a switch.
  • an object detection sensor using light may be employed as attachment/detachment detection means for detecting attachment/detachment of the filter 114 .
  • the operator (switch 115) that receives a predetermined operation for resetting by the user is a physical operator (an operator having a part that physically moves). It may be a virtual operator such as a button displayed on the .
  • the usage time of the filter is reset.
  • the smoke detector 11 is reset so that when the switch 116 detects a change from the filter 114 removed to the filter 114 installed, the filter usage time is reset. may be configured.
  • FIG. 9 is a diagram schematically showing a configuration example of the smoke sensor 11 according to this modification.
  • FIG. 9(a) is a side view of the smoke sensor 11.
  • FIG. 9( a ) an openable/closable cover 1102 included in the smoke sensor 11 according to this modification is arranged to cover the upper surface of the housing 110 .
  • 9(b) and 9(c) are top views of the smoke sensor 11 with the cover 1102 opened. 9B and 9C, illustration of the cover 1102 is omitted for the sake of convenience.
  • FIG. 9(b) shows the state with the filter 114 attached
  • FIG. 9(c) shows the state with the filter 114 removed. 9, the host system 12 illustrated in FIG. 2 and the like is omitted.
  • the user can inspect the components inside the housing 110 without removing the filter 114 with the cover 1102 open. Therefore, attachment and detachment of the filter 114 with respect to the smoke sensor 11 is limited to replacement of the filter.
  • the user removes the old filter 114 from the smoke sensor 11 by pulling out the filter 114 upward (in the direction of arrow X in FIG. 9A, toward the front in FIG. 9B) with the cover 1102 open. can be removed. Then, the user can attach a new filter 114 to the smoke sensor 11 by inserting the filter 114 in the opposite direction.
  • FIG. 10 is a diagram showing the functional configuration of a control unit 117 included in the smoke sensor 11 according to this modification. In this modification, the control unit 117 does not have the operation signal acquisition means 1174 .
  • FIG. 11 is a diagram illustrating the flow of processing performed by the timer means 1176 provided in the control unit 117 according to this modification.
  • the timer 1176 performs processing according to the flow shown in FIG.
  • the timing means 1176 determines whether the attachment/detachment signal has changed from the attachment signal to the removal signal or from the removal signal to the attachment signal (step S201).
  • the attachment/detachment signal changes from the arrival signal to the removal signal.
  • the timing means 1176 determines that the attachment/detachment signal has changed from the arrival signal to the removal signal (step S201; "1"), and stops measuring the usage time of the filter (step S202). Thereafter, timer 1176 terminates the series of processes shown in FIG.
  • the attachment/detachment signal changes from the removal signal to the arrival signal.
  • the timing means 1176 determines that the attachment/detachment signal has changed from the detachment signal to the attachment signal (step S201; "2"), resets the filter usage time to zero (step S203), and sets the filter usage time to zero. Timing is restarted (step S204).
  • timer 1176 measures the elapsed time after switch 116 (an example of attachment/detachment detector) detects that filter 114 has changed from the state in which filter 114 is removed to the state in which filter 114 is attached. Thereafter, timer 1176 terminates the series of processes shown in FIG.
  • the filter usage time is not reset. Therefore, it is difficult for the user to unintentionally reset the usage time of the filter.
  • control unit 117 the hardware of the control unit 117 is a computer, but the control unit 117 may be configured as a dedicated device having an integrated circuit such as ASIC or FPGA.
  • SYMBOLS 1 Smoke detection system, 10... Computer, 11... Smoke sensor, 12... Host system, 101... Processor, 102... Memory, 103... Input/output interface, 104... Communication interface, 110... Housing, 111... Light-emitting part, DESCRIPTION OF SYMBOLS 112... Light-receiving part 113... Fan 114... Filter 115... Switch 116... Switch 117... Control unit 1101... Partition plate 1102... Cover 1151... Button 1161... Button 1171... Light emission instruction means 1172 1173: Smoke determination means 1174: Operation signal acquisition means 1175: Attachment/detachment signal acquisition means 1176: Clock means 1177: Communication means.

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire-Detection Mechanisms (AREA)
PCT/JP2022/013942 2021-03-31 2022-03-24 煙感知器 WO2022210257A1 (ja)

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JP2023511118A JPWO2022210257A1 (enrdf_load_stackoverflow) 2021-03-31 2022-03-24
CN202280024346.8A CN117136393A (zh) 2021-03-31 2022-03-24 烟感知器

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JP2021-059840 2021-03-31

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CN (1) CN117136393A (enrdf_load_stackoverflow)
TW (1) TW202307797A (enrdf_load_stackoverflow)
WO (1) WO2022210257A1 (enrdf_load_stackoverflow)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08241474A (ja) * 1995-03-07 1996-09-17 Nohmi Bosai Ltd 火災検出装置
JPH1176863A (ja) * 1997-08-29 1999-03-23 Aiwa Co Ltd イオン式の空気清浄装置
JPH11147016A (ja) * 1997-11-14 1999-06-02 Nohmi Bosai Ltd エアフィルタ点検方法およびその構成
JP2011167683A (ja) * 2010-02-18 2011-09-01 Hakko Kk 空気清浄器およびその制御方法
JP2017116255A (ja) * 2017-02-20 2017-06-29 シャープ株式会社 送風装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08241474A (ja) * 1995-03-07 1996-09-17 Nohmi Bosai Ltd 火災検出装置
JPH1176863A (ja) * 1997-08-29 1999-03-23 Aiwa Co Ltd イオン式の空気清浄装置
JPH11147016A (ja) * 1997-11-14 1999-06-02 Nohmi Bosai Ltd エアフィルタ点検方法およびその構成
JP2011167683A (ja) * 2010-02-18 2011-09-01 Hakko Kk 空気清浄器およびその制御方法
JP2017116255A (ja) * 2017-02-20 2017-06-29 シャープ株式会社 送風装置

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JPWO2022210257A1 (enrdf_load_stackoverflow) 2022-10-06
CN117136393A (zh) 2023-11-28

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