CN111627182A - Smoke inductor with independent condensation recognition bin and use method - Google Patents
Smoke inductor with independent condensation recognition bin and use method Download PDFInfo
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- CN111627182A CN111627182A CN202010461859.8A CN202010461859A CN111627182A CN 111627182 A CN111627182 A CN 111627182A CN 202010461859 A CN202010461859 A CN 202010461859A CN 111627182 A CN111627182 A CN 111627182A
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- bin
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- tube
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Fire-Detection Mechanisms (AREA)
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Abstract
The invention relates to a smoke sensor with an independent condensation recognition bin and a using method thereof, wherein the smoke sensor comprises a shell; the shell is fixedly provided with a smoke detection bin and a condensation recognition bin; the smoke detection bin is fixedly provided with a first transmitting pipe, a first receiving pipe and a first partition plate; the smoke detection bin is provided with a first smoke inlet; the condensation recognition bin is fixedly provided with a reflecting column; the condensation recognition bin is fixedly provided with a second transmitting pipe, a second receiving pipe and a second partition plate; the second transmitting tube and the second receiving tube are both positioned at the middle upper part of the condensation recognition bin; the reflection column is used for reflecting the detection light rays emitted by the second emission tube, and the second receiving tube is not positioned in the emergent area of the light rays reflected by the reflection column; the condensation recognition bin is provided with an air inlet; the housing is provided with a plurality of second smoke inlets; the shell is also provided with a control panel; the control board is used for outputting an alarm signal when the difference value between the reverse current value of the second receiving tube and the reverse current value of the first receiving tube is greater than a trigger threshold value; the situation of false alarm is effectively avoided.
Description
Technical Field
The invention relates to the technical field of smoke sensors, in particular to a smoke sensor with an independent condensation recognition bin and a using method thereof.
Background
The photoelectric smoke fire detector uses smoke as a main detection object and is suitable for places with smoldering stages in the initial stage of fire. The photosensitive element and the optical darkroom are main components of the smoke fire detector, the photosensitive element comprises a plurality of transmitting tubes and receiving tubes, and light rays emitted by the transmitting tubes cannot be received by the receiving tubes under normal conditions; when smoke enters the optical darkroom, smoke particles generate a scattering effect on light, so that part of light emitted by the emitting tube is scattered to the receiving tube, the receiving tube receives an optical signal and transmits the optical signal to the central chip, and an alarm is triggered.
However, in the actual use process, under the influence of the change of the ambient temperature, condensation can be generated in the optical darkroom, the condensation generates a diffuse reflection effect on light rays emitted by the emitting tube, and the receiving tube receives partial light rays of the diffuse reflection, so that false alarm is finally caused. In response to this problem, many manufacturers apply an antifogging agent in the optical darkroom, but the antifogging agent is effective only for a period of time, and dust in the optical darkroom is often cleaned during use, which easily damages the coating and further weakens the anti-condensation effect.
Disclosure of Invention
The invention aims to solve the technical problem of providing a smoke sensor with an independent condensation recognition bin and a using method of the smoke sensor aiming at the defects in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
in one aspect, a smoke sensor with a freestanding condensation identification compartment is provided, comprising a housing; a smoke detection bin and a condensation recognition bin which is arranged side by side with the smoke detection bin are fixedly arranged in the shell;
a first emission tube for emitting detection light towards the middle area of the smoke detection bin, a first receiving tube for receiving scattered light when smoke scatters the detection light emitted by the first emission tube, and a first partition plate for preventing the detection light emitted from the side surface of the first emission tube from emitting to the first receiving tube are fixedly arranged in the smoke detection bin; a plurality of first smoke inlets are formed in the side surface of the smoke detection bin; the first smoke inlet is communicated with the interior of the smoke detection bin;
the inner side surface of the condensation recognition bin is fixedly provided with a non-circular reflection column; a second emitting tube for emitting detection light to the reflecting column, a second receiving tube for receiving diffuse reflection light when the condensation diffusely reflects the detection light emitted by the second emitting tube, and a second partition plate for preventing the detection light emitted from the side surface of the second emitting tube from irradiating the second receiving tube are fixedly arranged in the condensation recognition bin; the second transmitting tube and the second receiving tube are both positioned at the middle upper part of the condensation recognition bin; the reflection column is used for reflecting the detection light rays emitted by the second emission tube, and the second receiving tube is not positioned in the emergent area of the light rays reflected by the reflection column; the lower surface of the condensation recognition bin is provided with an air inlet for air to enter;
a plurality of second smoke inlets are arranged on the side surface of the shell; the second smoke inlet communicates with the interior of the housing; a control panel is also arranged in the shell; the first transmitting tube, the first receiving tube, the second transmitting tube and the second receiving tube are all electrically connected with and controlled by the control board; the control board is used for outputting an alarm signal when the difference value between the reverse current value of the second receiving tube and the reverse current value of the first receiving tube is larger than a trigger threshold value.
On the other hand, a using method of the smoke sensor is provided, based on the smoke sensor with the independent condensation recognition bin, and the using method comprises the following steps:
the first emission tube and the second emission tube both emit detection light;
acquiring a first reverse current value corresponding to the first receiving tube and a second reverse current value corresponding to the second receiving tube;
if the first receiving tube and the second receiving tube have no reverse current change, the control board does not act; if the first receiving tube and the second receiving tube have reverse current changes and the difference value of the first reverse current value and the second reverse current value is not larger than a preset trigger threshold value, the control board does not act; if the first receiving tube and the second receiving tube have reverse current changes and the difference value of the first reverse current value and the second reverse current value is larger than a preset trigger threshold value, the control panel outputs an alarm signal.
The invention has the beneficial effects that: the situation of false alarm is effectively avoided, and specifically, a second transmitting tube and a second receiving tube are arranged to become a comparison group of the first transmitting tube and the first receiving tube; aiming at the condensation recognition bin, firstly, the convection condition is not met, and secondly, the second transmitting tube and the second receiving tube are both positioned at the higher part of the condensation recognition bin, so smoke cannot enter an optical sensitive area of the condensation recognition bin, and air containing water vapor is ensured to enter the optical sensitive area; aiming at the smoke detection cabin, the smoke detection cabin has convection conditions, so that smoke can enter the smoke detection cabin through the first smoke inlet; therefore, compared with the smoke detection bin, the condensation recognition bin has no smoke in the interior.
When condensation does not exist, the detection light emitted by the second emitting tube is reflected by the reflecting column, and the second receiving tube does not have reverse current change because the second receiving tube is not in the emergent area of the light reflected by the reflecting column; at the moment, if the first receiving tube has reverse current change, because the condensation interference is eliminated, the fact that smoke enters the smoke detection bin can be confirmed, and the control panel outputs alarm information so as to trigger alarm in the following process;
when condensation exists, the condensation is attached to the reflecting column, and the detection light emitted by the second emitting tube is diffusely reflected by the condensation, so that the reverse current of the second receiving tube is changed; because the smoke detection bin also has condensation, the reverse current of the first receiving tube also changes, if no smoke exists at the moment, the reverse current value of the second receiving tube is approximately the same as the reverse current value of the first receiving tube, and the control panel does not act because the difference value of the two values is smaller than the trigger threshold value; if smoke exists in the smoke detection bin at the moment, the smoke can scatter the detection light emitted by the first emitting tube, so that the reverse current of the first receiving tube is greatly changed, the difference value between the reverse current value of the second receiving tube and the reverse current value of the first receiving tube is larger than a trigger threshold value, and the control panel outputs an alarm signal to trigger alarm.
Therefore, the smoke sensor can effectively eliminate false alarm caused by condensation, and is effective for a long time and long in service life compared with the conventional anti-fog coating.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only part of the embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive efforts according to the accompanying drawings:
fig. 1 is a cut-away view of a smoke sensor with a self-contained condensation recognition bin according to an embodiment of the present invention;
FIG. 2 is an exploded view of a smoke sensor with a self-contained condensation recognition chamber according to one embodiment of the present invention;
FIG. 3 is an enlarged view at A in FIG. 2;
fig. 4 is a cut-away view of a smoke sensor with a separate condensation recognition bin according to a second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without inventive step, are within the scope of the present invention.
Example one
The present embodiment provides a smoke sensor with a freestanding condensation identification compartment, as shown in fig. 1-3, comprising a housing 10; a smoke detection bin 11 and a condensation recognition bin 12 which is arranged side by side with the smoke detection bin 11 are fixedly arranged in the shell 10;
a first emitting tube 13 for emitting detection light towards the middle area of the smoke detection bin 11, a first receiving tube 14 for receiving scattered light when the smoke scatters the detection light emitted by the first emitting tube 13, and a first partition plate 15 for preventing the detection light emitted from the side surface of the first emitting tube 13 from emitting to the first receiving tube 14 are fixedly arranged in the smoke detection bin 11; a plurality of first smoke inlets 180 are arranged on the side surface of the smoke detection chamber 11; the first smoke inlet 180 is communicated with the interior of the smoke detection chamber 11;
the inner side surface of the condensation recognition bin 12 is fixedly provided with a non-circular reflecting column 16; a second emitting tube 17 for emitting detection light to the reflecting column 16, a second receiving tube 18 for receiving diffuse reflection light when the condensation diffuse reflection second emitting tube 17 emits the detection light, and a second partition plate 19 for preventing the detection light emitted from the side surface of the second emitting tube 17 from irradiating the second receiving tube 18 are fixedly arranged in the condensation recognition bin 12; the second transmitting tube 17 and the second receiving tube 18 are both positioned at the middle upper part of the condensation recognition bin 12; the reflection column 16 is used for reflecting the detection light emitted by the second emission tube 17, and the second receiving tube 18 is not in the emergent area of the light reflected by the reflection column 16; the lower surface of the condensation recognition bin 12 is provided with an air inlet 181 for air to enter;
the lateral surface of the casing 10 is provided with a plurality of second smoke inlets 182; the second smoke inlet 182 communicates with the interior of the housing 10; the inside of the housing 10 is also provided with a control board 110; the first transmitting tube 13, the first receiving tube 14, the second transmitting tube 17 and the second receiving tube 18 are electrically connected with and controlled by the control board 110; the control board 110 is used for outputting an alarm signal when the difference value between the reverse current value of the second receiving pipe 18 and the reverse current value of the first receiving pipe 14 is larger than a trigger threshold value. This smoke sensor has effectively avoided the condition of wrong report alert, and is specific:
a second transmitting tube 17 and a second receiving tube 18 are arranged to be a comparison group of the first transmitting tube 13 and the first receiving tube 14; for the condensation recognition bin 12, firstly, convection conditions are not provided, and secondly, the second transmitting tube 17 and the second receiving tube 18 are both positioned at the higher part of the condensation recognition bin 12, so smoke cannot enter an optically sensitive area of the condensation recognition bin 12, and air containing water vapor is ensured to enter the optically sensitive area; for the smoke detection cabin 11, the convection condition is provided, so that smoke can enter the smoke detection cabin 11 through the first smoke inlet 180; therefore, compared with the smoke detection chamber 11, the condensation recognition chamber 12 does not have smoke inside.
When there is no condensation, the detection light emitted by the second emitting tube 17 is reflected by the reflection column 16, and since the second receiving tube 18 is not in the emergent area of the light reflected by the reflection column 16, there is no reverse current change in the second receiving tube 18; at this time, if the first receiving tube 14 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 110 outputs alarm information for triggering an alarm in the following;
when condensation exists, the condensation is attached to the reflecting column 16, and the detection light emitted by the second emitting tube 17 is diffusely reflected by the condensation, so that the reverse current of the second receiving tube 18 is changed; since the smoke detection chamber 11 also has condensation, the reverse current of the first receiving tube 14 also changes, and if there is no smoke at this time, the reverse current value of the second receiving tube 18 and the reverse current value of the first receiving tube 14 tend to be the same, and the control panel 110 does not operate because the difference between the two values is smaller than the trigger threshold; if there is smoke in the smoke detection chamber 11, the smoke scatters the detection light emitted from the first emission tube 13, which causes a large change in the reverse current of the first receiving tube 14, and the difference between the reverse current value of the second receiving tube 18 and the reverse current value of the first receiving tube 14 is greater than the trigger threshold, the control board 110 outputs an alarm signal to trigger an alarm.
Therefore, the smoke sensor can effectively eliminate false alarm caused by condensation, and is effective for a long time and long in service life compared with the conventional anti-fog coating.
As shown in fig. 1 to 3, the reflective columns 16 are triangular prisms, and are provided with a plurality of groups, and a plurality of side surfaces can participate in reflection during reflection; the reflecting column 16 is a triangular prism, so that the processing is convenient; and three groups of side surfaces of the reflecting column 16, one of the side surfaces is fixed with the condensation recognition bin 12, the other side surface faces the second transmitting pipe 17, and the other side surface faces the second receiving pipe 18.
As shown in fig. 1 to 3, the inner wall of the condensation recognition bin 12 on which the reflective column 16 is disposed is tilted outward in a direction away from the second receiving tube 18, so that the detection light of the second emitting tube 17 can be reflected obliquely upward, and in the case of no condensation, the second receiving tube 18 is more difficult to receive the detection light emitted by the second emitting tube 17.
As shown in fig. 1 to 3, the control board 110 is fixed to the housing 10; the smoke detection bin 11 comprises an upper bin cover 111 and a lower bin body 112 tightly covered with the upper bin cover 111 in a matching way; the lower bin body 112 and the control panel 110 are both fixed with the upper bin cover 111; the first partition board 15 comprises an upper board body 113 and a lower board body 114 which are respectively fixed with the lower surface of the upper bin cover 111 and the inner bottom surface of the lower bin body 112; the opposite side surfaces of the upper plate body 113 and the lower plate body 114 are respectively provided with a first mounting groove 183 matched with the pipe body of the first transmitting pipe 13 and a second mounting groove 184 matched with the pipe body of the first receiving pipe 14, during mounting, the first transmitting pipe 13 and the first receiving pipe 14 are respectively placed into the first mounting groove 183 and the second mounting groove 184, and then the upper bin cover 111 and the lower bin body 112 are covered, and the first transmitting pipe 13 and the first receiving pipe 14 are clamped by the cooperation of the upper plate body 113 and the lower plate body 114, so that the mounting is convenient and the positioning is good.
As shown in fig. 1-3, the air inlets 181 are provided in plural, and the aperture is smaller than 1mm, which is not only convenient for air to enter, but also can block mosquitoes out of the condensation recognition bin 12.
As shown in fig. 1-3, the housing 10 includes an upper housing cover 115, and a lower housing 116 tightly fitted with the upper housing cover 115; the control board 110 is fixedly arranged on one side surface of the upper shell cover 115 facing the lower shell 116; the smoke detection bin 11 and the condensation recognition bin 12 are fixedly arranged on the lower surface of the control panel 110, when the smoke detection bin 11 and the condensation recognition bin 12 are installed, the smoke detection bin 11 and the condensation recognition bin 12 are fixed on the control panel 110, the smoke detection bin 11, the condensation recognition bin 12, the control panel 110 and the upper shell cover 115 are assembled on the lower shell 116, and installation is convenient; the second smoke inlet 182 is located at the lower end of the lower housing 116.
As shown in fig. 1 to 3, the side wall of the condensation recognition bin 12 is provided with two third mounting grooves respectively matched with the pins of the second transmitting tube 17 and the second receiving tube 18, so that the mounting is convenient; the third mounting groove is communicated with the outer surface of the condensation recognition bin 12, so that the second transmitting tube 17, the second receiving tube 18 and the control panel 110 are electrically connected conveniently; a gap 185 for smoke to enter and exit the first smoke inlet 180 is reserved between the condensation recognition bin 12 and the smoke detection bin 11, so that the smoke detection bin 11 has better convection conditions.
Example two
This embodiment provides a take smoke sensor in stand alone type condensation discernment storehouse, and the same place with embodiment is no longer repeated, and the difference lies in:
as shown in fig. 4, a light shielding plate 117 is further fixed inside the condensation recognition bin 12 for preventing external light from directly irradiating the second receiving pipe 18, so as to reduce the influence of external ambient light on the second receiving pipe 18.
As shown in fig. 4, the light shielding plates 117 are arranged in multiple groups and distributed in a staggered manner; two groups of shading plates 117 which are adjacent in the vertical direction are distributed on two sides of the condensation recognition bin 12, and the plurality of groups of shading plates 117 are matched to form a circuitous path, so that particles are difficult to enter an optical sensitive area of the condensation recognition bin 12.
EXAMPLE III
The embodiment provides a use method of a smoke sensor, which comprises the following steps:
step S1: the first emission tube and the second emission tube both emit detection light.
Step S2: and acquiring 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 the first receiving tube and the second receiving tube have no reverse current change, the control panel does not act; if the first receiving tube and the second receiving tube both have reverse current changes, and the difference value of the first reverse current value and the second reverse current value is not larger than a preset trigger threshold value, the control panel does not act; if the first receiving tube and the second receiving tube have reverse current changes and the difference value of the first reverse current value and the second reverse current value is larger than a preset trigger threshold value, the control panel outputs an alarm signal.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (10)
1. A smoke sensor with an independent condensation recognition bin comprises a shell; the device is characterized in that a smoke detection bin and a condensation recognition bin which is parallel to the smoke detection bin are fixedly arranged in the shell;
a first emission tube for emitting detection light towards the middle area of the smoke detection bin, a first receiving tube for receiving scattered light when smoke scatters the detection light emitted by the first emission tube, and a first partition plate for preventing the detection light emitted from the side surface of the first emission tube from emitting to the first receiving tube are fixedly arranged in the smoke detection bin; a plurality of first smoke inlets are formed in the side surface of the smoke detection bin; the first smoke inlet is communicated with the interior of the smoke detection bin;
the inner side surface of the condensation recognition bin is fixedly provided with a non-circular reflection column; a second emitting tube for emitting detection light to the reflecting column, a second receiving tube for receiving diffuse reflection light when the condensation diffusely reflects the detection light emitted by the second emitting tube, and a second partition plate for preventing the detection light emitted from the side surface of the second emitting tube from irradiating the second receiving tube are fixedly arranged in the condensation recognition bin; the second transmitting tube and the second receiving tube are both positioned at the middle upper part of the condensation recognition bin; the reflection column is used for reflecting the detection light rays emitted by the second emission tube, and the second receiving tube is not positioned in the emergent area of the light rays reflected by the reflection column; the lower surface of the condensation recognition bin is provided with an air inlet for air to enter;
a plurality of second smoke inlets are arranged on the side surface of the shell; the second smoke inlet communicates with the interior of the housing; a control panel is also arranged in the shell; the first transmitting tube, the first receiving tube, the second transmitting tube and the second receiving tube are all electrically connected with and controlled by the control board; the control board is used for outputting an alarm signal when the difference value between the reverse current value of the second receiving tube and the reverse current value of the first receiving tube is larger than a trigger threshold value.
2. The smoke sensor with the independent condensation recognition bin according to claim 1, wherein the reflecting columns are triangular prisms and are provided with a plurality of groups; and one of the three groups of side surfaces of the reflecting column is fixed with the condensation recognition bin, the other side surface of the reflecting column faces the second transmitting pipe, and the other side surface of the reflecting column faces the second receiving pipe.
3. The smoke sensor with the independent condensation recognition bin as claimed in claim 2, wherein the inner wall of the condensation recognition bin on which the reflection column is arranged is inclined outwards in a direction away from the second receiving pipe.
4. The smoke sensor with the independent condensation recognition bin as claimed in claim 1, wherein a light shielding plate for preventing external light from directly irradiating the second receiving pipe is fixedly arranged in the condensation recognition bin.
5. The smoke sensor with the independent condensation recognition bin as claimed in claim 4, wherein the light shielding plates are provided with a plurality of groups and distributed in a staggered manner; two groups of shading plates which are adjacent in the vertical direction are distributed on two sides of the condensation recognition bin.
6. A smoke sensor with a self-contained condensation recognition chamber according to claim 1, wherein said control panel is fixed to said housing; the smoke detection bin comprises an upper bin cover and a lower bin body which is tightly covered with the upper bin cover in a matched manner; the lower bin body and the control panel are both fixed with the upper bin cover; the first partition plate comprises an upper plate body and a lower plate body which are respectively fixed with the lower surface of the upper bin cover and the inner bottom surface of the lower bin body; the upper plate body with the relative side surface of lower plate body all be provided with the first mounting groove of first transmitting tube body adaptation and with the second mounting groove of first receiving tube body adaptation.
7. The smoke sensor with the independent condensation recognition bin as claimed in claim 1, wherein the air inlets are provided in plurality and have a caliber of less than 1 mm.
8. The smoke sensor with the self-contained condensation recognition bin of claim 1, wherein the housing comprises an upper shell cover and a lower shell tightly matched with the upper shell cover; the control panel is fixedly arranged on the surface of one side, facing the lower shell, of the upper shell cover; the smoke detection bin and the condensation recognition bin are fixedly arranged on the lower surface of the control panel; the second smoke inlet is located at the lower end of the lower shell.
9. The smoke sensor with the independent condensation recognition bin as claimed in claim 1, wherein the side wall of the condensation recognition bin is provided with two third mounting grooves respectively matched with the second transmitting pipe pin and the second receiving pipe pin; the third mounting groove is communicated with the outer surface of the condensation recognition bin; and a gap for allowing smoke to enter and exit the first smoke inlet is reserved between the condensation recognition bin and the smoke detection bin.
10. A method of using a smoke sensor with a self-contained condensation recognition chamber according to any of claims 1 to 9, comprising the steps of:
the first emission tube and the second emission tube both emit detection light;
acquiring a first reverse current value corresponding to the first receiving tube and a second reverse current value corresponding to the second receiving tube;
if the first receiving tube and the second receiving tube have no reverse current change, the control board does not act; if the first receiving tube and the second receiving tube have reverse current changes and the difference value of the first reverse current value and the second reverse current value is not larger than a preset trigger threshold value, the control board does not act; if the first receiving tube and the second receiving tube have reverse current changes and the difference value of the first reverse current value and the second reverse current value is larger than a preset trigger threshold value, the control panel outputs an alarm signal.
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Cited By (1)
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| GB2603305A (en) * | 2021-02-02 | 2022-08-03 | Carrier Corp | Smoke entry solution for multi wave multi angle safety device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US11790746B2 (en) | 2021-02-02 | 2023-10-17 | Carrier Corporation | Smoke entry solution for multi wave multi angle safety device |
| GB2603305B (en) * | 2021-02-02 | 2024-08-07 | Carrier Corp | Smoke entry solution for multi wave multi angle safety device |
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| CN111627182B (en) | 2023-07-18 |
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