WO2022210256A1 - 煙感知器 - Google Patents

煙感知器 Download PDF

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Publication number
WO2022210256A1
WO2022210256A1 PCT/JP2022/013935 JP2022013935W WO2022210256A1 WO 2022210256 A1 WO2022210256 A1 WO 2022210256A1 JP 2022013935 W JP2022013935 W JP 2022013935W WO 2022210256 A1 WO2022210256 A1 WO 2022210256A1
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WO
WIPO (PCT)
Prior art keywords
smoke
filter
light
state
attachment
Prior art date
Application number
PCT/JP2022/013935
Other languages
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 CN202280023947.7A priority Critical patent/CN117121072A/zh
Priority to JP2023511117A priority patent/JPWO2022210256A1/ja
Publication of WO2022210256A1 publication Critical patent/WO2022210256A1/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
    • 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.
  • Patent Document 1 discloses a smoke sensor equipped with a filter.
  • Patent Literature 1 discloses a suction unit that sucks outside air, a detection unit that detects smoke particles from the sucked outside air, a filter for removing dust from the sucked outside air, and a casing that surrounds the filter.
  • a smoke sensing device in which a filter section and a filter section are separately detachably unitized from a housing is described.
  • the smoke sensing device described in Patent Document 1 is easy to identify, maintain, and replace the faulty part.
  • smoke detectors have a housing and are equipped with a mechanism for detecting particles in a storage space formed inside the housing.
  • Many of such smoke detectors are provided with a cover that can be opened and closed so that a worker can check the condition of parts inside the housing or replace them for maintenance purposes.
  • Patent Document 2 is a patent document that discloses a smoke sensor with an openable cover.
  • an optical case that blocks light from the outside
  • a laser light source that emits light in the optical case, and light emitted from the laser light source is scattered by smoke particles present in the smoke detection part.
  • a fire determination unit that determines that a fire is occurring when the level of the output signal of the light receiving element is equal to or higher than a threshold.
  • the optical case included in the smoke sensor described in Patent Document 2 has a box and an openable and closable optical cover that closes the opening of the box.
  • the smoke sensor described in Patent Document 2 includes a control unit that stops light emission from the laser light source when the optical cover is opened, or makes the light emission cycle from the laser light source longer than when the optical cover is closed. It is characterized by being prepared.
  • the smoke detector described in Patent Literature 2 having such a configuration can avoid the risk of laser light entering the eyes of a worker who opens the optical cover and hurting the eyes of the worker.
  • the present invention provides a smoke sensor that does not erroneously detect dust flowing in as smoke when a filter that captures dust is removed or displaced.
  • 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 sensing means for sensing particles in the air inside and sensing smoke based on the sensing results; a filter arranged on a flow path of air flowing into the sensing region to capture dust contained in the air; and attachment/detachment detection means for detecting attachment/detachment of the filter, and when the attachment/detachment detection means detects that the filter has changed from the attached state to the removed state, the sensing means performs at least an operation for detecting smoke.
  • a smoke detector is proposed comprising a control means for deactivating a part.
  • detection of smoke is stopped when the filter that captures dust is removed or displaced, so that incoming dust is not erroneously detected as smoke.
  • 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.
  • 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 monitoring terminal device, a smoke alarm panel, a central monitoring system, or the like.
  • the host system 12 and the smoke sensor 11 are connected for communication via a communication medium that is wired, wireless, or a mixture thereof, and are capable of data communication with each other.
  • 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 schematically showing the configuration of the smoke sensor 11.
  • FIG. 2(a) schematically shows the smoke sensor 11 with the filter 116 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 116 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 emitting section 112, a light receiving section 113, a lens 114, a fan 115, a filter 116, a switch 117, and a control unit 118.
  • 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 118 .
  • 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 and the light emitting unit 112 have LEDs, for example, and emit light from the LEDs under the control of the control unit 118 .
  • 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 113 so that the emitted light does not directly enter the light-receiving portion 113 .
  • the light emitted by the light emitting unit 112 is light for measuring dirt on the lens 114 .
  • the light emitting unit 112 is arranged, for example, in a direction along an air flow path from the intake port P to the exhaust port Q when viewed from the light receiving unit 113, and emits light in a direction directly incident on the light receiving unit 113.
  • the distance from the light emitting unit 112 to the light receiving unit 113 is shorter than the distance from the light emitting unit 111 to the light receiving unit 113 .
  • the light emitted from the light emitting unit 112 and directed to the light receiving unit 113 is less affected by particles in the air flowing into the sensing region S1 than the light emitted from the light emitting unit 111 and directed to the light receiving unit 113.
  • the light-receiving unit 113 has, for example, a photodiode. It receives light and outputs a light intensity signal to control unit 118 indicating the intensity of the received light.
  • the lens 114 converges part of the light emitted from the light emitting unit 111 and the light emitting unit 112 and guides it to the light receiving unit 113 .
  • the fan 115 operates under the control of the control unit 118 and causes a flow of air from the exterior space through the air inlet P into the sensing region S1 and out through the air outlet Q to the exterior space by means of rotating blades. play a role.
  • the filter 116 includes a tubular casing and a filter body arranged within the casing.
  • the filter 116 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 116 (in this case, the space between the fan 115 and the cover 1102) from the outside, and maintains the filter 116 in the closed state. Thus, it plays a role of causing the filter 116 to exhibit its function.
  • the switch 117 (an example of an attachment/detachment detection means) is a component that plays a role in detecting attachment/detachment of the filter 116, that is, an attachment state and an attachment/detachment state.
  • Switch 117 has a button 1171 biased toward filter 116 .
  • the switch 117 outputs an on signal to the control unit 118 while the filter 116 is in the on state and the button 1171 is pressed, and controls the off signal while the filter 116 is in the off state and the button 1171 is not pressed.
  • Output to unit 118 Hereinafter, the incoming signal and the outgoing signal are collectively referred to as the outgoing signal.
  • the control unit 118 is a device that controls the operation of the smoke sensor 11, etc.
  • the hardware of the control unit 118 is, for example, a computer, and the control unit 118 is realized by the computer performing processing according to the program for the control unit 118 .
  • FIG. 3 is a diagram showing the configuration of the computer 10 employed as hardware for the control unit 118.
  • 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 118. As shown in FIG. That is, the computer 10 performs processing according to the program for the control unit 118, thereby realizing the control unit 118 having the components shown in FIG. The functional components included in the control unit 118 will be described below.
  • the light emission instruction means 1181 instructs the light emission section 111 to emit light.
  • the light emission instructing means 1181 emits light, for example, every time a predetermined period of time elapses, except for the period from when the smoke sensor 11 is in operation and when the smoke sensor 11 is instructed to stop operation by an instruction from the control means 1180 to be described later until when it is ordered to resume operation.
  • the light emitting unit 111 is instructed so that the unit 111 emits light.
  • the light emission instructing means 1182 instructs the light emitting section 112 to emit light.
  • the light emission instructing means 1182 causes the light emitting section 112 to emit light every time a predetermined time elapses, for example, after an operation stop is instructed by an instruction from the control means 1180 to be described later, except until an operation restart is instructed.
  • the instruction is given to the unit 112 .
  • the light intensity signal acquisition means 1183 acquires the light intensity signal output from the light receiving section 113 .
  • the smoke determination means 1184 determines whether or not the light intensity indicated by the light intensity signal acquired by the light intensity signal acquisition means 1183 satisfies a predetermined condition for smoke detection, thereby 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 intensity of light received by the light receiving unit 113 is affected by the degree of dirt on the lens 114 . Therefore, the smoke determination means 1184 corrects and uses the conditions for smoke detection (for example, the reference range) according to the degree of contamination of the lens 114 measured by the contamination measurement means 1185 .
  • the smoke determining means 1184 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 1184 is transmitted to the host system 12 by the communication means 1186 .
  • the smoke determining means 1184 uses a different condition (for example, a different reference range from the normal time) to measure dirt. continue processing for smoke detection. However, if the time during which the light emitting unit 112 irradiates light for measuring contamination is short enough to cause no substantial problem even if smoke is not detected during that time, the smoke determining means 1184 The process for smoke sensing may be stopped while 112 emits the contamination measurement light.
  • a different condition for example, a different reference range from the normal time
  • the light emission instructing means 1181, the light emitting section 111, the light receiving section 113, the light intensity signal acquiring means 1183, and the smoke determining means 1184 sense particles in the air within the sensing area S1, and sense smoke based on the sensing results. constitute a sensing means;
  • the contamination measuring means 1185 is based on the amount of change in the light intensity indicated by the light intensity signal acquired by the light intensity signal acquiring means 1183 when the light emitting unit 112 changes from a non-light emitting state to a light emitting state. , to measure the contamination of the lens 114 .
  • the contamination measuring unit 1185 indicates, for example, the degree of contamination of the lens 114 and the degree of change in the intensity of light received by the light receiving unit 113 between when the light emitting unit 112 is turned off and when the light emitting unit 112 is emitting light according to the degree of contamination. Data is stored, and the degree of contamination of the lens 114 is measured by referring to the data.
  • the contamination measuring means 1185 generates contamination notification data that notifies the measured degree of contamination.
  • the dirt notification data generated by the dirt measuring means 1185 is transmitted to the host system 12 by the communication means 1186 . Also, as described above, the contamination notification data generated by the contamination measuring means 1185 is also used by the smoke determining means 1184 to modify the conditions for smoke detection.
  • the smoke determining means 1184 stops the processing for detecting smoke while the light emitting part 112 is emitting light for measuring contamination
  • the light emitting instruction means 1182 instructs the light emitting part 111 to stop emitting light during this period.
  • the dirt measuring means 1185 may measure the degree of dirt on the lens 114 based on the light intensity measured by the light receiving section 113 that receives only the light emitted from the light emitting section 112 .
  • the light emission instruction means 1182, the light emitting section 112, the light receiving section 113, the light intensity signal acquisition means 1183, and the dirt measurement means 1185 constitute dirt detection means for detecting dirt within the sensing area S1.
  • a communication means 1186 transmits and receives various data to and from the host system 12 .
  • the communication means 1186 transmits the smoke generation notification data generated by the smoke determination means 1184 and the dirt notification data generated by the dirt measurement means 1185 to the host system 12 as described above.
  • a user of the host system 12 (for example, an administrator of the smoke detection system 1) is informed by the smoke notification data transmitted from the smoke detector 11 that a fire has occurred in the monitored space where the smoke detector 11 is arranged. You can know that there is a high possibility that the user of the host system 12 can know the degree of contamination of the lens 114 of the smoke sensor 11 from the contamination notification data transmitted from the smoke sensor 11, and can instruct the operator to clean the lens 114 as necessary. You can request cleaning, etc.
  • the attachment/detachment signal acquisition means 1187 acquires the attachment/detachment signal from the switch 117 .
  • the operation instruction means 1188 instructs the fan 115 to start and end operation.
  • the clock means 1189 continuously measures the current time based on a clock signal generated by a clock provided in the processor 101, and generates a time signal indicating the measured current time.
  • the control means 1180 controls the operations of the light emission instruction means 1181 , the light emission instruction means 1182 , the smoke determination means 1184 , the dirt measurement means 1185 and the driving instruction means 1188 .
  • the control means 1180 instructs the light emission instruction means 1181 or the like to stop or resume operation.
  • FIG. 5 is a diagram showing the flow of processing performed by the control means 1180 when the attachment/detachment signal changes.
  • control means 1180 determines whether the change indicates a change from the attachment signal to the removal signal or from the removal signal to the attachment signal (step S101). .
  • step S101 When it is determined in step S101 that the change in the attachment/detachment signal indicates a change from the wearing state to the disengaging state (step S101; "1"), the control means 1180 performs the following processing (step S201).
  • the light emission instruction means 1181 is prohibited from instructing the light emission section 111 to emit light.
  • the light emission instruction means 1182 is prohibited from instructing the light emission unit 112 to emit light.
  • the smoke determination means 1184 is instructed to stop processing for smoke detection.
  • the operation instruction means 1188 is instructed to stop the operation of the fan 115 .
  • the light emitting units 111 and 112 stop emitting light, and the fan 115 stops rotating the blades.
  • transmission of smoke occurrence notification data and contamination notification data from the communication means 1186 to the host system 12 is stopped.
  • control means 1180 ends the process according to the flow of FIG.
  • step S101 When it is determined in step S101 that the change in the attachment/detachment signal indicates a change from the disengaged state to the attached state (step S101; "2"), the control means 1180 first instructs the operation instruction means 1188 to turn on the fan 115. An instruction to resume operation is issued (step S301). The fan 115 restarts the rotation of the blades in accordance with the processing of the control means 1180 in step S301.
  • control means 1180 determines whether or not a predetermined time (for example, 1 minute) has passed (step S302). If it is determined in step S302 that the predetermined time has not elapsed (step S302; "No"), the control means 1180 repeats the determination in step S302.
  • a predetermined time for example, 1 minute
  • step S301 the airflow generated by the fan 115 discharges the dust that has entered the sensing area S1 to the outside from the intake port P until the determination in the step S302 becomes "Yes". It's time for That is, when the filter 116 is removed by the operator, air containing dust may flow into the sensing area S1. Even in such a case, after the filter 116 is attached, the fan 115 operates for a predetermined period of time before the process for detecting smoke by the smoke determination means 1184 is resumed. Dust that has entered the is discharged.
  • step S302 When it is determined in step S302 that the predetermined time has passed (step S302; "Yes"), the control means 1180 performs the following process (step S303). (1) The light emission instruction means 1181 is permitted to instruct the light emission unit 111 to emit light. (2) Permit the light emission instruction means 1182 to instruct the light emission unit 112 to emit light. (3) The smoke determination means 1184 is instructed to resume processing for smoke detection. (4) Order the contamination measuring means 1185 to resume processing for contamination measurement.
  • the light emitting unit 111 and the light emitting unit 112 resume light emission
  • the smoke determination unit 1184 resumes smoke detection processing
  • the contamination measurement unit 1185 performs contamination measurement processing. to resume.
  • the communication means 1186 transmits smoke occurrence notification data to the host system 12. 12, dirt notification data is transmitted.
  • the fan 115 restarts operation first, and after dust is discharged from the detection area S1, smoke detection and dirt measurement are performed. Since the operation of is resumed, erroneous detection of smoke and erroneous measurement of contamination due to dust flying in the sensing region S1 immediately after the filter 116 is attached will not occur.
  • attachment/detachment of the filter 116 is directly detected by the switch 117 .
  • a configuration may be adopted in which attachment/detachment of the filter 116 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/detachment of the filter 116 by the switch 117, but indirectly detects the attachment/detachment of the filter 116 by detecting the opening/closing of the cover 1102 covering the filter 116. This is different from the smoke sensor 11 according to the embodiment described above.
  • the button 1171 of the switch 117 is biased in the direction toward the cover 1102 .
  • Switch 117 outputs an incoming signal to control unit 118 indicating that filter 116 is firmly held in place by cover 1102 while cover 1102 is closed and button 1171 is pressed.
  • the switch 117 outputs a signal indicating that the filter 116 is not held by the cover 1102 and the filter 116 may be out of the predetermined position. to the control unit 118 .
  • switch 117 detects an open state of cover 1102 as a state in which filter 116 is removed, and a closed state of cover 1102 as a state in which filter 116 is attached. detected as
  • the switch 117 is used as attachment/detachment detection means for detecting attachment/detachment of the filter 116 .
  • the type of attachment/detachment detection means for detecting attachment/detachment of the filter 116 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 116 .
  • the control means 1180 when it is detected that the filter 116 has changed from the on state to the off state, the control means 1180 causes the light emission section 111 to emit light, the light emission section 112 to emit light, and the smoke determination section 1184 to emit smoke.
  • the processing for sensing, the processing for measuring contamination by the contamination measuring means 1185, and the operation of the fan 115 are all stopped.
  • the control means 1180 does not have to stop all of these, and may stop at least part of the operation for detecting smoke.
  • the control unit 1180 instructs the light emission instructing unit 1181 to It is not necessary to prohibit the light emission instruction to 111 or prohibit the light emission instruction means 1182 from giving the light emission instruction to the light emitting section 112 .
  • the control means 1180 when it is detected that the filter 116 has changed from the detached state to the attached state, the control means 1180 first instructs the fan 115 to resume operation, causing the light emitting section 111 to emit light, Resumption of all of the light emission by the light emitting unit 112, the process for detecting smoke by the smoke determining means 1184, and the process for measuring contamination by the contamination measuring means 1185 is suspended for a predetermined time.
  • the control means 1180 instructs the fan 115 to restart the operation, for example, to the light emission instruction means 1181 to the light emitting section 111. , or the light emission instruction means 1182 may be permitted to issue a light emission instruction to the light emitting section 112 .
  • control unit 118 the hardware of the control unit 118 is a computer, but the control unit 118 may be configured as a dedicated device having an integrated circuit such as ASIC or FPGA.
  • DESCRIPTION OF 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-emitting part 113... Light-receiving part 114... Lens 115... Fan 116... Filter 117... Switch 118... Control unit 1101... Partition plate 1102... Cover 1171... Button 1180... Control means 1181 Light emission instruction means 1182 Light emission instruction means 1183 Light intensity signal acquisition means 1184 Smoke determination means 1185 Dirt measurement means 1186 Communication means 1187 Detachment signal acquisition means 1188 Driving instruction means 1189 ... means of timing.

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  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
PCT/JP2022/013935 2021-03-29 2022-03-24 煙感知器 WO2022210256A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202280023947.7A CN117121072A (zh) 2021-03-29 2022-03-24 烟感知器
JP2023511117A JPWO2022210256A1 (enrdf_load_stackoverflow) 2021-03-29 2022-03-24

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Application Number Priority Date Filing Date Title
JP2021055947 2021-03-29
JP2021-055947 2021-03-29

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WO2022210256A1 true WO2022210256A1 (ja) 2022-10-06

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JP (1) JPWO2022210256A1 (enrdf_load_stackoverflow)
CN (1) CN117121072A (enrdf_load_stackoverflow)
TW (1) TW202305752A (enrdf_load_stackoverflow)
WO (1) WO2022210256A1 (enrdf_load_stackoverflow)

Citations (3)

* 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
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
JP2016070539A (ja) * 2014-09-29 2016-05-09 日立アプライアンス株式会社 空気清浄機

Patent Citations (3)

* 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
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
JP2016070539A (ja) * 2014-09-29 2016-05-09 日立アプライアンス株式会社 空気清浄機

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TW202305752A (zh) 2023-02-01
CN117121072A (zh) 2023-11-24
JPWO2022210256A1 (enrdf_load_stackoverflow) 2022-10-06

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