WO2021237502A1 - 一种防止误报警的火灾探测器及使用方法 - Google Patents
一种防止误报警的火灾探测器及使用方法 Download PDFInfo
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- WO2021237502A1 WO2021237502A1 PCT/CN2020/092560 CN2020092560W WO2021237502A1 WO 2021237502 A1 WO2021237502 A1 WO 2021237502A1 CN 2020092560 W CN2020092560 W CN 2020092560W WO 2021237502 A1 WO2021237502 A1 WO 2021237502A1
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- tube
- receiving tube
- condensation
- light
- fire detector
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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 invention relates to the technical field of fire detectors, and more specifically, to a fire detector for preventing false alarms and a method of use.
- the photoelectric smoke detector uses smoke as the main detection object, and is suitable for places where there is a smoldering stage at the initial stage of the fire.
- the photosensitive element and the optical darkroom are the main components of the smoke detector.
- the photosensitive element is composed of a number of emitting tubes and receiving tubes. Under normal circumstances, the light emitted by the emitting tube will not be received by the receiving tube; smoke enters the optics. In the dark room, the smoke particles have a scattering effect on the light, so that part of the light emitted by the transmitting tube is scattered to the receiving tube.
- the receiving tube receives the optical signal and transmits it to the central chip to trigger an alarm.
- the technical problem to be solved by the present invention is to provide a fire detector that prevents false alarms and a method for using the fire detector in view of the above-mentioned defects of the prior art.
- a fire detector for preventing false alarms including a housing; wherein, a smoke detection chamber and a condensation recognition chamber are fixed inside the housing;
- the smoke detection chamber is fixedly provided with a first receiving tube facing the middle area; the housing is provided with a plurality of first smoke inlets; the smoke detection chamber is provided with a plurality of second smoke inlets all communicating with the inside; A non-circular reflection column and a second receiving tube facing the reflection column and serving as a control group for the first receiving tube are fixed inside the condensation identification compartment; the second receiving tube is located in the condensation Expose the middle and upper part of the identification compartment;
- the housing is also provided with a transmitting tube assembly that provides detection light to the first receiving tube and the second receiving tube; the reflecting column is used to reflect the detection light emitted by the transmitting tube assembly, and the The second receiving tube is not in the exit area of the light reflected by the reflecting column; the lower surface of the condensation recognition chamber is provided with an air inlet for gas to enter; the casing is also provided with a control board; the first The receiving tube, the second receiving tube, and the transmitting tube assembly are all electrically connected to and controlled by the control board; the control board is used to reverse the current value of the second receiving tube with the first When the difference of the reverse current value of a receiving tube is greater than the trigger threshold, an alarm signal is output.
- a method for using a fire detector is provided, based on the above-mentioned fire detector for preventing false alarms, which includes the following steps:
- the emission tube assembly emits detection light
- the control board does not operate; if the first receiving tube and the second receiving tube both have reverse current changes, and the The difference between the first reverse current value and the second reverse current value is not greater than the preset trigger threshold, and the control board does not operate; if the first receiving tube and the second receiving tube both have reverse When the direction current changes, and the difference between the first reverse current value and the second reverse current value is greater than a preset trigger threshold, the control board outputs an alarm signal.
- the second receiving tube is set to become the control group of the first receiving tube; for the condensation recognition bin, one is that it does not have convection conditions, and the other is that The second receiving tube is located in the higher part of the condensation recognition chamber, so smoke cannot enter the optically sensitive area of the condensation recognition chamber, so as to ensure that the air containing water vapor enters the optically sensitive area; for the smoke detection chamber, it has convection Conditions to ensure that smoke can enter the smoke detection chamber through the first smoke inlet; therefore, compared with the smoke detection chamber, there will be no smoke in the condensation recognition chamber.
- the detection light emitted by the transmitting tube assembly is reflected by the reflecting column. Since the second receiving tube is not in the exit area of the light reflected by the reflecting column, there is no reverse current change in the second receiving tube; at this time, if The first receiving tube has a reverse current change. Since the condensation interference has been eliminated, it can be confirmed that smoke has entered the smoke detection chamber, and the control board will output alarm information to trigger the alarm later;
- the condensation When there is condensation, the condensation is attached to the reflection column, and the detection light emitted by the transmitting tube assembly is diffusely reflected by the condensation, which makes the reverse current of the second receiving tube change; because the smoke detection chamber also has condensation, Therefore, the reverse current of the first receiving tube will also change.
- the control board will not act; if there is smoke in the smoke detection chamber at this time, the smoke will scatter the detection light emitted by the transmitter tube assembly, resulting in a large change in the reverse current of the first receiving tube, and the second The difference between the reverse current value of the receiving tube and the reverse current value of the first receiving tube is greater than the trigger threshold, and the control board outputs an alarm signal to trigger an alarm.
- the fire detector can effectively eliminate false alarms caused by condensation, and compared with the previous anti-fog coating, it is effective for a long time and has a long service life.
- Figure 1 is an exploded view of a fire detector for preventing false alarms according to the first embodiment of the present invention
- FIG. 2 is a cross-sectional view of a fire detector for preventing false alarms according to the first embodiment of the present invention
- Figure 3 is an exploded view of a fire detector for preventing false alarms provided by the second embodiment of the present invention.
- FIG. 4 is a cross-sectional view of a fire detector for preventing false alarms provided by the second embodiment of the present invention.
- Figure 5 is an exploded view of a fire detector for preventing false alarms provided by the third embodiment of the present invention.
- FIG. 6 is a cross-sectional view of a fire detector for preventing false alarms provided by the third embodiment of the present invention.
- Figure 7 is an exploded view of a fire detector for preventing false alarms provided by the fourth embodiment of the present invention.
- Fig. 8 is a cross-sectional view of a fire detector for preventing false alarms provided by the fourth embodiment of the present invention.
- the embodiment of the present invention provides a fire detector for preventing false alarms, as shown in Figs.
- the smoke detection chamber 11 is fixedly provided with a first receiving tube 13 facing the middle area; the housing 10 is provided with a plurality of first smoke inlets 180; the smoke detection chamber 11 is provided with a plurality of second smoke inlets 181 which are all connected to the inside;
- a non-circular reflection column 14 is fixed inside the condensation recognition chamber 12, and a second receiving tube 15 facing the reflection column 14 and serving as a control group for the first receiving tube 13; the second receiving tube 15 is located in the condensation recognition chamber 12
- the housing 10 is also provided with a transmitting tube assembly that provides detection light to the first receiving tube 13 and the second receiving tube 15; the reflection column 14 is used to reflect the detection light emitted by the transmitting tube assembly, and the second receiving tube 15 is not in the reflection column. 14 is in the exit area of the reflected light; the lower surface of the condensation recognition bin 12 is provided with an air inlet 182 for gas to enter; the housing 10 is also provided with a control board 16; the first receiving pipe 13, the second receiving pipe 15, and The transmitting tube components are electrically connected to and controlled by the control board 16; the control board 16 is used to output when the difference between the reverse current value of the second receiving tube 15 and the reverse current value of the first receiving tube 13 is greater than the trigger threshold Alarm.
- This fire detector effectively avoids false alarms, specifically:
- the condensation identification bin 12 Set up the second receiving tube 15 to become the control group of the first receiving tube 13; for the condensation identification bin 12, one is that it does not have convection conditions, and the other is that the second receiving tube 15 is located at a higher position of the condensation identification bin 12 Therefore, the smoke cannot enter the optically sensitive area of the condensation recognition chamber 12, so as to ensure that the air containing water vapor enters the optically sensitive area; for the smoke detection chamber 11, it has convection conditions to ensure that the smoke can pass through the first smoke inlet 180 Enter the smoke detection chamber 11; therefore, compared with the smoke detection chamber 11, the condensation recognition chamber 12 has no smoke inside.
- the detection light emitted by the transmitting tube assembly is reflected by the reflecting column 14. Since the second receiving tube 15 is not in the exit area of the light reflected by the reflecting column 14, the second receiving tube 15 has no reverse current change; At this time, if the first receiving tube 13 has a reverse current change, since the condensation interference has been eliminated, it can be confirmed that smoke has entered the smoke detection chamber 11, and the control board 16 outputs an alarm message to trigger an alarm later;
- the condensation When there is condensation, the condensation is attached to the reflecting column 14, and the detection light emitted by the transmitting tube assembly is diffusely reflected by the condensation, so that the reverse current of the second receiving tube 15 changes; because the smoke detection chamber 11 also has Condensation, therefore, the reverse current of the first receiving tube 13 will also change.
- the control board 16 does not act; if there is smoke in the smoke detection chamber 11 at this time, the smoke will scatter the detection light emitted by the transmitter tube assembly, resulting in the reflection of the first receiving tube 13 When the direction current changes greatly, the difference between the reverse current value of the second receiving tube 15 and the reverse current value of the first receiving tube 13 is greater than the trigger threshold, and the control board 16 outputs an alarm signal to trigger an alarm.
- the fire detector can effectively eliminate false alarms caused by condensation, and compared with the previous anti-fog coating, it is effective for a long time and has a long service life.
- the condensation recognition bin 12 is located outside of the smoke detection bin 11 and is side by side;
- the smoke detection chamber 11 is also fixedly provided with a first partition plate 18 that prevents the detection light emitted from the side of the first launch tube 17 from being directed toward the first receiving tube 13;
- the launch tube assembly also includes a second launch tube 19 fixed in the condensation identification compartment 12 and providing detection light to the second receiving tube 15;
- the outgoing detection light is directed to the second partition plate 110 of the second receiving tube 15;
- the first launching tube 17 and the second launching tube 19 are both electrically connected to the control board 16 and controlled by it.
- the fire detector has the advantages of low design difficulty. Specifically: the first transmitting tube 17 corresponds to the first receiving tube 13, and the second transmitting tube 19 corresponds to the second receiving tube 15.
- the optical paths of the two parts are independent of each other, which reduces Design difficulty.
- the inner wall of the reflection column 14 provided on the condensation identification bin 12 is inclined outward in the direction away from the second receiving tube 15, so that the detection light of the transmitting tube assembly can be reflected obliquely upward. In the case of exposure, it is more difficult for the second receiving tube 15 to receive the detection light emitted by the transmitting tube assembly.
- the reflecting column 14 is a triangular prism and is provided with multiple groups. During reflection, multiple side surfaces can participate in the reflection.
- the inside of the condensation recognition bin 12 is also fixedly provided with a shading plate 111 to prevent external light from directly irradiating the second receiving tube 15 to reduce the influence of external ambient light on the second receiving tube 15; the shading plate 111
- FIGS. 1 to 2 there are multiple air inlets 182 with a diameter less than 1 mm, which not only facilitates the entry of gas, but also keeps mosquitoes out of the condensation recognition bin 12.
- the embodiment of the present invention provides a fire detector that prevents false alarms.
- the same points as those in the first embodiment will not be repeated here. The difference is:
- the condensation recognition bin 12 is located inside the smoke detection bin 11 and is fixed therewith; Three launch tubes 112;
- the smoke detection chamber 11 is also fixedly provided with a third partition plate 113 that prevents the detection light emitted from the side of the third launch tube 112 from being directed toward the first receiving tube 13;
- the launching tube assembly also includes a fourth launching tube 114 fixed in the condensation identification bin 12 and providing detection light to the second receiving tube 15;
- the outgoing detection light is directed to the fourth partition board 115 of the second receiving tube 15;
- the third launching tube 112 and the fourth launching tube 114 are both electrically connected to the control board 16 and controlled by it.
- the condensation recognition bin 12 is arranged in the smoke detection bin 11, and the overall structure is smaller and more compact.
- the embodiment of the present invention provides a fire detector that prevents false alarms.
- the same points as those in the first embodiment will not be repeated here. The difference is:
- the condensation recognition bin 12 is located outside and side by side with the smoke detection bin 11;
- the launch tube assembly includes a fifth launch tube 116 fixed in the smoke detection bin 11;
- the fifth launch tube 116 Used to provide detection light to the first receiving tube 13 and the second receiving tube 15;
- the smoke detection chamber 11 is also fixed with a fifth partition to prevent the detection light emitted from the side of the fifth transmitting tube 116 from being directed to the first receiving tube 13 Plate 117;
- the side surface of the smoke detection chamber 11 is provided with a light exit channel 183 for the detection light emitted by the fifth emission tube 116 to pass through;
- the side surface of the condensation recognition chamber 12 is provided with a first light inlet channel 184 corresponding to the light outlet channel 183 and for the detection light emitted by the fifth emission tube 116 to penetrate, and a first light-transmitting sheet that shields the first light inlet channel 184 118;
- the first light-transmitting sheet 118 is fixed to the condensation recognition bin 12;
- the fifth emission tube 116 is electrically connected to and controlled by the control board 16.
- only one set of emission tubes can be provided to meet the demand, and the material cost is reduced; the first light-transmitting sheet 118 avoids air convection and achieves the purpose of light transmission and airtightness.
- the embodiment of the present invention provides a fire detector that prevents false alarms.
- the same points as those in the first embodiment will not be repeated here. The difference is:
- the condensation recognition bin 12 is located inside and fixed to the smoke detection bin 11;
- the launch tube assembly includes a sixth launch tube 119 fixed in the smoke detection bin 11;
- the sixth launch tube 119 Used to provide detection light to the first receiving tube 13 and the second receiving tube 15;
- the smoke detection chamber 11 is also fixed with a sixth partition to prevent the detection light emitted from the side of the sixth transmitting tube 119 from being directed to the first receiving tube 13 Board 120;
- the side surface of the condensation recognition chamber 12 is provided with a second light-inlet channel 185 through which the detection light emitted by the sixth emission tube 120 penetrates, and a second light-transmitting sheet 121 that shields the second light-inlet channel 185;
- the sheet 121 is fixed to the condensation recognition bin 12;
- the sixth launch tube 120 is electrically connected to and controlled by the control board 16.
- only one set of emission tubes can be provided to meet the demand, and the material cost is reduced; the second light-transmitting sheet 121 avoids air convection and achieves the purpose of light transmission and airtightness;
- the condensation recognition bin 12 is set in the smoke In the detection chamber 11, the overall structure is smaller and more compact.
- the embodiment of the present invention provides a method for using a fire detector.
- the method includes the following steps:
- Step S1 The emission tube assembly emits detection light.
- Step S2 Obtain a first reverse current value corresponding to the first receiving tube, and a second reverse current value corresponding to the second receiving tube.
- Step S3 If there is no reverse current change in the first receiving tube and the second receiving tube, the control board does not operate; if the first receiving tube and the second receiving tube both have reverse current changes, and the first reverse current value and The difference between the second reverse current value is not greater than the preset trigger threshold, and the control board does not operate; if the first receiving tube and the second receiving tube both have reverse current changes, and the first reverse current value and the second reverse current value When the difference in current value is greater than the preset trigger threshold, the control board outputs an alarm signal.
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Abstract
一种防止误报警的火灾探测器及使用方法，该火灾探测器包括外壳（10）；外壳（10）内固设有烟雾检测仓（11）和凝露识别仓（12）；烟雾检测仓（11）内固设有第一接收管（13）；外壳（10）设置有第一烟雾进口（180）；烟雾检测仓（11）设置有第二烟雾进口（181）；凝露识别仓（12）内部固设有反射柱（14）以及第二接收管（15）；第二接收管（15）位于凝露识别仓（12）的中上部；外壳（10）内还设置有发射管组件（17,19）；反射柱（14）用于反射发射管组件（17,19）所发射的检测光线，且第二接收管（15）不在反射柱（14）所反射光线的出射区域内；凝露识别仓（12）设置有进气口（182）；外壳（10）内还设置有控制板（16）；控制板（16）用于在第二接收管（15）反向电流值与第一接收管（13）反向电流值的差值大于触发阈值时，输出报警信号；该火灾探测器有效避免了误报警的情况。
Description
本发明涉及火灾探测器技术领域，更具体地说，涉及一种防止误报警的火灾探测器及使用方法。
光电型感烟火灾探测器，以烟雾为主要探测对象，适用于火灾初期有阴燃阶段的场所。其中，感光元件和光学暗室是感烟火灾探测器的主要组成部分，感光元件由若干发射管和接收管组成，正常情况下，发射管发出的光线不会被接收管接收到；有烟雾进入光学暗室时，烟雾颗粒对光线产生散射效果，从而将发射管发出的部分光线散射到接收管上，接收管接收到光学信号，并传递给中枢芯片，从而触发报警。
但是在实际使用过程中，受环境温度变化的影响，光学暗室内会产生凝露，凝露对发射管发出的光线产生漫反射效果，接收管接收到漫反射的部分光线，最终导致误报警。针对这一问题，许多厂商在光学暗室内涂抹防雾剂，但是防雾剂仅在一段时期内有效，且使用时经常清洁光学暗室内的灰尘，容易损伤到涂层，进一步削弱了抗凝露效果。
本发明要解决的技术问题在于，针对现有技术的上述缺陷，提供一种防止误报警的火灾探测器，以及一种火灾探测器的使用方法。
本发明解决其技术问题所采用的技术方案是：
一方面，提供了一种防止误报警的火灾探测器，包括外壳；其中，所述外壳的内部固设有烟雾检测仓和凝露识别仓；
所述烟雾检测仓内固设有朝向其中部区域的第一接收管；所述外壳设置有多个第一烟雾进口；所述烟雾检测仓设置有均与其内部连通的多个第二烟雾进口；所述凝露识别仓的内部固设有非圆形的反射柱，以及朝向所述反射柱且作为所述第一接收管对照组的第二接收管；所述第二接收管位于所述凝露识别仓的中上部；
所述外壳内还设置有向所述第一接收管和所述第二接收管提供检测光线的发射管组件；所述反射柱用于反射所述发射管组件所发射的检测光线，且所述第二接收管不在所述反射柱所反射光线的出射区域内；所述凝露识别仓的下表面设置有供气体进入的进气口；所述外壳内还设置有控制板；所述第一接收管、所述第二接收管以及所述发射管组件，均与所述控制板电连接并受其控制；所述控制板用于在所述第二接收管反向电流值与所述第一接收管反向电流值的差值大于触发阈值时，输出报警信号。
另一方面，提供了一种火灾探测器的使用方法，基于上述的一种防止误报警的火灾探测器，其中，包括如下步骤：
发射管组件发射检测光线；
获取与第一接收管对应的第一反向电流值，以及与第二接收管对应的第二反向电流值；
若所述第一接收管和所述第二接收管均无反向电流变化，控制板不动作；若所述第一接收管和所述第二接收管均有反向电流变化，且所述第一反向电流值和所述第二反向电流值的差值不大于预设的触发阈值，所述控制板不动作；若所述第一接收管和所述第二接收管均有反向电流变化，且所述第一反向电流值和所述第二反向电流值的差值大于预设的触发阈值，所述控制板输出报警信号。
本发明的有益效果在于：有效避免了误报警的情况，具体的，设置第二接收管，使其成为第一接收管的对照组；针对凝露识别仓，一是不具备对流条件，二是第二接收管位于凝露识别仓的较高处，因此，烟雾无法进入凝露识别仓的光学敏感区域，从而确保进入光学敏感区域的是含有水蒸气的空气；针对烟雾检测仓，其具备对流条件，确保烟雾可以经第一烟雾进口进到烟雾检测仓内；因此，凝露识别仓与烟雾检测仓相比，内里不会有烟雾。
无凝露时，发射管组件所发射的检测光线被反射柱反射，由于第二接收管不在反射柱所反射光线的出射区域内，因此，第二接收管无反向电流变化；此时，若第一接收管有反向电流变化，由于已经排除了凝露干扰，即可确认是有烟雾进到了烟雾检测仓，控制板输出报警信息以便后续触发报警；
有凝露时，凝露附着在反射柱上，发射管组件所发射的检测光线被凝露漫反射，使得第二接收管的反向电流发生变化；由于烟雾检测仓同样也会有凝露，因此，第一接收管的反向电流也会发生变化，若此时无烟雾，则第二接收管的反向电流值与第一接收管的反向电流值趋于相同，由于两者差值小于触发阈值，控制板不动作；若此时烟雾检测仓中是有烟雾的，烟雾会对发射管组件发射的检测光线进行散射，导致第一接收管的反向电流发生大幅度变化，第二接收管反向电流值与第一接收管反向电流值的差值大于触发阈值，控制板输出报警信号，以触发报警。
因此，本火灾探测器能有效排除凝露导致的误报警情况，且与以往的涂防雾层相比，长期有效，使用寿命长。
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将结合附图及实施例对本发明作进一步说明，下面描述中的附图仅仅是本发明的部分实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他附图：
图1是本发明实施例一提供的一种防止误报警的火灾探测器的爆炸图；
图2是本发明实施例一提供的一种防止误报警的火灾探测器的剖切图；
图3是本发明实施例二提供的一种防止误报警的火灾探测器的爆炸图；
图4是本发明实施例二提供的一种防止误报警的火灾探测器的剖切图；
图5是本发明实施例三提供的一种防止误报警的火灾探测器的爆炸图；
图6是本发明实施例三提供的一种防止误报警的火灾探测器的剖切图；
图7是本发明实施例四提供的一种防止误报警的火灾探测器的爆炸图；
图8是本发明实施例四提供的一种防止误报警的火灾探测器的剖切图。
具体实施方式
为了使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的技术方案进行清楚、完整的描述，显然，所描述的实施例是本发明的部分实施例，而不是全部实施例。基于本发明的实施例，本领域普通技术人员在没有付出创造性劳动的前提下所获得的所有其他实施例，都属于本发明的保护范围。
实施例一
本发明实施例提供了一种防止误报警的火灾探测器，如图1-图2所示，包括外壳10；外壳10的内部固设有烟雾检测仓11和凝露识别仓12；
烟雾检测仓11内固设有朝向其中部区域的第一接收管13；外壳10设置有多个第一烟雾进口180；烟雾检测仓11设置有均与其内部连通的多个第二烟雾进口181；凝露识别仓12的内部固设有非圆形的反射柱14，以及朝向反射柱14且作为第一接收管13对照组的第二接收管15；第二接收管15位于凝露识别仓12的中上部；
外壳10内还设置有向第一接收管13和第二接收管15提供检测光线的发射管组件；反射柱14用于反射发射管组件所发射的检测光线，且第二接收管15不在反射柱14所反射光线的出射区域内；凝露识别仓12的下表面设置有供气体进入的进气口182；外壳10内还设置有控制板16；第一接收管13、第二接收管15以及发射管组件，均与控制板16电连接并受其控制；控制板16用于在第二接收管15反向电流值与第一接收管13反向电流值的差值大于触发阈值时，输出报警信号。本火灾探测器有效避免了误报警的情况，具体的：
设置第二接收管15，使其成为第一接收管13的对照组；针对凝露识别仓12，一是不具备对流条件，二是第二接收管15位于凝露识别仓12的较高处，因此，烟雾无法进入凝露识别仓12的光学敏感区域，从而确保进入光学敏感区域的是含有水蒸气的空气；针对烟雾检测仓11，其具备对流条件，确保烟雾可以经第一烟雾进口180进到烟雾检测仓11内；因此，凝露识别仓12与烟雾检测仓11相比，内里不会有烟雾。
无凝露时，发射管组件所发射的检测光线被反射柱14反射，由于第二接收管15不在反射柱14所反射光线的出射区域内，因此，第二接收管15无反向电流变化；此时，若第一接收管13有反向电流变化，由于已经排除了凝露干扰，即可确认是有烟雾进到了烟雾检测仓11，控制板16输出报警信息以便后续触发报警；
有凝露时，凝露附着在反射柱14上，发射管组件所发射的检测光线被凝露漫反射，使得第二接收管15的反向电流发生变化；由于烟雾检测仓11同样也会有凝露，因此，第一接收管13的反向电流也会发生变化，若此时无烟雾，则第二接收管15的反向电流值与第一接收管13的反向电流值趋于相同，由于两者差值小于触发阈值，控制板16不动作；若此时烟雾检测仓11中是有烟雾的，烟雾会对发射管组件发射的检测光线进行散射，导致第一接收管13的反向电流发生大幅度变化，第二接收管15反向电流值与第一接收管13反向电流值的差值大于触发阈值，控制板16输出报警信号，以触发报警。
因此，本火灾探测器能有效排除凝露导致的误报警情况，且与以往的涂防雾层相比，长期有效，使用寿命长。
如图1-图2所示，凝露识别仓12位于烟雾检测仓11的外部，且与其并排；发射管组件包括固设在烟雾检测仓11内并向第一接收管13提供检测光线的第一发射管17；烟雾检测仓11的内部还固设有防止第一发射管17侧面所出射检测光线射向第一接收管13的第一隔断板18；
发射管组件还包括固设在凝露识别仓12内并向第二接收管15提供检测光线的第二发射管19；凝露识别仓12的内部还固设有防止第二发射管19侧面所出射检测光线射向第二接收管15的第二隔断板110；第一发射管17以及第二发射管19，均与控制板16电连接并受其控制。本火灾探测器具备设计难度小的优点，具体的：第一发射管17与第一接收管13对应，第二发射管19与第二接收管15对应，两部分光路是相互独立的，降低了设计难度。
如图1-图2所示，凝露识别仓12上设置有反射柱14的内壁朝远离第二接收管15的方向外倾，可以将发射管组件的检测光线朝斜上方反射，在没有凝露的情况下，第二接收管15更难以接收到发射管组件发射的检测光线。
如图1-图2所示，反射柱14为三棱柱，且设置有多组，反射时，多个侧表面均可参与反射。
如图1-图2所示，凝露识别仓12的内部还固设有防止外界光线直射第二接收管15的遮光板111，降低外界环境光对第二接收管15的影响；遮光板111设置有多组，且呈错落分布；竖直方向上相邻的两组遮光板111，分布在凝露识别仓12的两侧，多组遮光板111配合形成迂回的路径，使得颗粒物难以进到凝露识别仓12的光学敏感区域内。
如图1-图2所示，进气口182设置有多个，且口径小于1mm，既便于气体进入，又能将蚊虫挡在凝露识别仓12外。
实施例二
本发明实施例提供了一种防止误报警的火灾探测器，与实施例一相同之处不再赘述，不同之处在于：
如图3-图4所示，凝露识别仓12位于烟雾检测仓11的内部，且与其固定；发射管组件包括固设在烟雾检测仓11内并向第一接收管13提供检测光线的第三发射管112；烟雾检测仓11的内部还固设有防止第三发射管112侧面所出射检测光线射向第一接收管13的第三隔断板113；
发射管组件还包括固设在凝露识别仓12内并向第二接收管15提供检测光线的第四发射管114；凝露识别仓12的内部还固设有防止第四发射管114侧面所出射检测光线射向第二接收管15的第四隔断板115；第三发射管112以及第四发射管114，均与控制板16电连接并受其控制。本实施例中，将凝露识别仓12设置在烟雾检测仓11中，整体的结构更为小巧、紧凑。
实施例三
本发明实施例提供了一种防止误报警的火灾探测器，与实施例一相同之处不再赘述，不同之处在于：
如图5-图6所示，凝露识别仓12位于烟雾检测仓11的外部，且与其并排；发射管组件包括固设在烟雾检测仓11内的第五发射管116；第五发射管116用于向第一接收管13和第二接收管15提供检测光线；烟雾检测仓11的内部还固设有防止第五发射管116侧面所出射检测光线射向第一接收管13的第五隔断板117；烟雾检测仓11的侧表面设置有供第五发射管116所发射检测光线穿出的出光通道183；
凝露识别仓12的侧表面设置有与出光通道183对应并供第五发射管116所发射检测光线穿入的第一进光通道184，以及遮挡第一进光通道184的第一透光片118；第一透光片118与凝露识别仓12固定；第五发射管116与控制板16电连接并受其控制。本实施例中，仅设置一组发射管即可满足需求，降低了材料成本；第一透光片118避免了空气对流，达到了透光不透气的目的。
实施例四
本发明实施例提供了一种防止误报警的火灾探测器，与实施例一相同之处不再赘述，不同之处在于：
如图7-图8所示，凝露识别仓12位于烟雾检测仓11的内部，且与其固定；发射管组件包括固设在烟雾检测仓11内的第六发射管119；第六发射管119用于向第一接收管13和第二接收管15提供检测光线；烟雾检测仓11的内部还固设有防止第六发射管119侧面所出射检测光线射向第一接收管13的第六隔断板120；
凝露识别仓12的侧表面设置有供第六发射管120所发射检测光线穿入的第二进光通道185，以及遮挡第二进光通道185的第二透光片121；第二透光片121与凝露识别仓12固定；第六发射管120与控制板16电连接并受其控制。本实施例中，仅设置一组发射管即可满足需求，降低了材料成本；第二透光片121避免了空气对流，达到了透光不透气的目的；将凝露识别仓12设置在烟雾检测仓11中，整体的结构更为小巧、紧凑。
实施例五
本发明实施例提供了一种火灾探测器的使用方法，该方法包括如下步骤：
步骤S1：发射管组件发射检测光线。
步骤S2：获取与第一接收管对应的第一反向电流值，以及与第二接收管对应的第二反向电流值。
步骤S3：若第一接收管和第二接收管均无反向电流变化，控制板不动作；若第一接收管和第二接收管均有反向电流变化，且第一反向电流值和第二反向电流值的差值不大于预设的触发阈值，控制板不动作；若第一接收管和第二接收管均有反向电流变化，且第一反向电流值和第二反向电流值的差值大于预设的触发阈值，控制板输出报警信号。
应当理解的是，对本领域普通技术人员来说，可以根据上述说明加以改进或变换，而所有这些改进和变换都应属于本发明所附权利要求的保护范围。
Claims (10)
- 一种防止误报警的火灾探测器，包括外壳；其特征在于，所述外壳的内部固设有烟雾检测仓和凝露识别仓；所述烟雾检测仓内固设有朝向其中部区域的第一接收管；所述外壳设置有多个第一烟雾进口；所述烟雾检测仓设置有均与其内部连通的多个第二烟雾进口；所述凝露识别仓的内部固设有非圆形的反射柱，以及朝向所述反射柱且作为所述第一接收管对照组的第二接收管；所述第二接收管位于所述凝露识别仓的中上部；所述外壳内还设置有向所述第一接收管和所述第二接收管提供检测光线的发射管组件；所述反射柱用于反射所述发射管组件所发射的检测光线，且所述第二接收管不在所述反射柱所反射光线的出射区域内；所述凝露识别仓的下表面设置有供气体进入的进气口；所述外壳内还设置有控制板；所述第一接收管、所述第二接收管以及所述发射管组件，均与所述控制板电连接并受其控制；所述控制板用于在所述第二接收管反向电流值与所述第一接收管反向电流值的差值大于触发阈值时，输出报警信号。
- 根据权利要求1所述的一种防止误报警的火灾探测器，其特征在于，所述凝露识别仓位于所述烟雾检测仓的外部，且与其并排；所述发射管组件包括固设在所述烟雾检测仓内并向所述第一接收管提供检测光线的第一发射管；所述烟雾检测仓的内部还固设有防止所述第一发射管侧面所出射检测光线射向所述第一接收管的第一隔断板；所述发射管组件还包括固设在所述凝露识别仓内并向所述第二接收管提供检测光线的第二发射管；所述凝露识别仓的内部还固设有防止所述第二发射管侧面所出射检测光线射向所述第二接收管的第二隔断板；所述第一发射管以及所述第二发射管，均与所述控制板电连接并受其控制。
- 根据权利要求1所述的一种防止误报警的火灾探测器，其特征在于，所述凝露识别仓位于所述烟雾检测仓的内部，且与其固定；所述发射管组件包括固设在所述烟雾检测仓内并向所述第一接收管提供检测光线的第三发射管；所述烟雾检测仓的内部还固设有防止所述第三发射管侧面所出射检测光线射向所述第一接收管的第三隔断板；所述发射管组件还包括固设在所述凝露识别仓内并向所述第二接收管提供检测光线的第四发射管；所述凝露识别仓的内部还固设有防止所述第四发射管侧面所出射检测光线射向所述第二接收管的第四隔断板；所述第三发射管以及所述第四发射管，均与所述控制板电连接并受其控制。
- 根据权利要求1所述的一种防止误报警的火灾探测器，其特征在于，所述凝露识别仓位于所述烟雾检测仓的外部，且与其并排；所述发射管组件包括固设在所述烟雾检测仓内的第五发射管；所述第五发射管用于向所述第一接收管和所述第二接收管提供检测光线；所述烟雾检测仓的内部还固设有防止所述第五发射管侧面所出射检测光线射向所述第一接收管的第五隔断板；所述烟雾检测仓的侧表面设置有供所述第五发射管所发射检测光线穿出的出光通道；所述凝露识别仓的侧表面设置有与所述出光通道对应并供所述第五发射管所发射检测光线穿入的第一进光通道，以及遮挡所述第一进光通道的第一透光片；所述第一透光片与所述凝露识别仓固定；所述第五发射管与所述控制板电连接并受其控制。
- 根据权利要求1所述的一种防止误报警的火灾探测器，其特征在于，所述凝露识别仓位于所述烟雾检测仓的内部，且与其固定；所述发射管组件包括固设在所述烟雾检测仓内的第六发射管；所述第六发射管用于向所述第一接收管和所述第二接收管提供检测光线；所述烟雾检测仓的内部还固设有防止所述第六发射管侧面所出射检测光线射向所述第一接收管的第六隔断板；所述凝露识别仓的侧表面设置有供所述第六发射管所发射检测光线穿入的第二进光通道，以及遮挡所述第二进光通道的第二透光片；所述第二透光片与所述凝露识别仓固定；所述第六发射管与所述控制板电连接并受其控制。
- 根据权利要求1所述的一种防止误报警的火灾探测器，其特征在于，所述凝露识别仓上设置有所述反射柱的内壁朝远离所述第二接收管的方向外倾。
- 根据权利要求1所述的一种防止误报警的火灾探测器，其特征在于，所述反射柱为三棱柱，且设置有多组。
- 根据权利要求1所述的一种防止误报警的火灾探测器，其特征在于，所述凝露识别仓的内部还固设有防止外界光线直射所述第二接收管的遮光板；所述遮光板设置有多组，且呈错落分布；竖直方向上相邻的两组所述遮光板，分布在所述凝露识别仓的两侧。
- 根据权利要求1所述的一种防止误报警的火灾探测器，其特征在于，所述进气口设置有多个，且口径小于1mm。
- 一种火灾探测器的使用方法，基于权利要求1-9任一所述的一种防止误报警的火灾探测器，其特征在于，包括如下步骤：发射管组件发射检测光线；获取与第一接收管对应的第一反向电流值，以及与第二接收管对应的第二反向电流值；若所述第一接收管和所述第二接收管均无反向电流变化，控制板不动作；若所述第一接收管和所述第二接收管均有反向电流变化，且所述第一反向电流值和所述第二反向电流值的差值不大于预设的触发阈值，所述控制板不动作；若所述第一接收管和所述第二接收管均有反向电流变化，且所述第一反向电流值和所述第二反向电流值的差值大于预设的触发阈值，所述控制板输出报警信号。
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