CN216817543U

CN216817543U - Fire detector

Info

Publication number: CN216817543U
Application number: CN202220103913.6U
Authority: CN
Inventors: 邱晓平; 张海涛; 刘雪锋; 王四华
Original assignee: Zhejiang Huaxiao Technology Co ltd
Current assignee: Zhejiang Huaxiao Technology Co ltd
Priority date: 2022-01-14
Filing date: 2022-01-14
Publication date: 2022-06-24
Anticipated expiration: 2032-01-14

Abstract

The utility model relates to a fire detector, which can finally transmit a fire signal to an alarm system through a controller to trigger an alarm after a smoke sensor, a thermistor probe and a thermopile sensor all detect the fire signal, thereby effectively avoiding the fire error alarm phenomenon caused by dust, water vapor or winged insects and the like and greatly improving the detection accuracy of the fire detector.

Description

Fire detector

Technical Field

The utility model relates to the field of fire detection, in particular to a fire detector.

Background

The existing fire detector is low in temperature sensing precision, and mostly adopts a physical structure design, for example, a semi-closed environment is formed, so that the false alarm phenomenon caused by insects and ambient light is reduced, but the false alarm rate cannot be effectively reduced aiming at other dust accumulation, water vapor and the like, the influence of the external environment is large, the fire detector is easy to generate fire false alarm, and manpower and material resources are wasted.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a fire detector capable of reducing false alarm rate.

A fire detector comprises a housing, a smoke sensor, at least one thermistor probe, at least one thermopile sensor, and a controller; wherein the smoke sensor, the thermistor probe and the thermopile sensor are all arranged in the shell, and the controller is communicably connected to the smoke sensor, the thermistor probe and the thermopile sensor and is used for triggering an alarm when the smoke sensor, the thermistor probe and the thermopile sensor all detect a fire signal.

So set up, just can finally transmit fire signal for alarm system in order to trigger the alarm through the controller after smoke sensor, thermistor probe and thermopile sensor three all detect fire signal, effectively avoided the conflagration phenomenon of misreporting because of other circumstances such as dust, steam or winged insect produce, improve fire detector's detection accuracy by a wide margin.

In one embodiment of the utility model, when the smoke sensor detects a fire signal, the controller controls the thermistor probe to perform temperature detection; and after the thermistor probe detects a fire signal, the controller controls the thermopile sensor to perform imaging detection so as to trigger an alarm after the fire signal is detected.

With the arrangement, after the smoke sensor senses smoke, the controller can sequentially trigger the thermistor probe and the thermopile sensor, detect the temperature of the smoke or the ambient air flow by using the thermistor probe, and eliminate the false alarm phenomenon caused by water vapor or dust; further, after the thermistor probe detects a fire signal, the thermopile sensor is triggered, infrared imaging is carried out by using the high-precision temperature sensing thermopile sensor, and the ambient temperature in an infrared coverage range is detected, so that false alarm caused by smoke or ambient light generated by smoke extraction and other non-fire conditions is avoided; therefore, the detection accuracy is effectively ensured, and the condition that the detection efficiency is reduced due to disordered detection sequences can be avoided.

In one embodiment of the utility model, the housing comprises a mounting shell and a smoke inlet shell which are connected with each other, a labyrinth detection cavity of the smoke sensor and the smoke inlet shell are coaxially arranged, and a flow passage is formed between the labyrinth detection cavity and the smoke inlet shell.

Due to the arrangement, the split mounting shell and the smoke inlet shell can respectively play different roles, and the fire detector can be mounted on a wall body through the outer wall of the mounting shell and can also contain and mount other elements through the mounting shell; the labyrinth detection cavity of the smoke sensor is positioned in the smoke inlet shell and is coaxially arranged with the smoke inlet shell, so that smoke entering from the periphery of the smoke inlet shell can timely fill the flow channel to cover the labyrinth detection cavity, and the detection speed of the smoke sensor is improved.

In one embodiment of the utility model, the thermistor probe comprises a connecting end and a detecting end, the connecting end is fixedly connected with the mounting shell, and the detecting end is suspended in the flow channel.

So set up, in the runner that advances cigarette shell and smoke sensor labyrinth detection chamber formation with the detection end suspension of thermistor probe, can ensure that smog or the air current that the conflagration arouses can be smooth and easy flows through the detection end, improve the detection efficiency of detection end.

In one embodiment of the present invention, the probe end is suspended at an axially central position of the flow passage.

According to the arrangement, smoke or airflow entering from the smoke inlet shell can flow through or wrap the detection end of the thermistor probe comprehensively, so that the detection end can detect the smoke temperature or the airflow temperature in the environment more accurately and rapidly.

In one embodiment of the utility model, the thermistor probe is in a plurality, and the plurality of thermistor probes are arranged in the cigarette inlet shell in an axial symmetry manner.

So set up, the thermistor probe that a plurality of axisymmetrics set up can detect the smog that advances the different sides of cigarette shell and get into respectively, realizes smog temperature or air current temperature among the three hundred sixty degrees all-round detection ring border, promotes conflagration detection speed and accuracy.

In an embodiment of the utility model, a containing groove is formed in a bottom wall of the housing, and the thermopile sensor is embedded in the containing groove.

So set up, can enough protect the thermopile through the perisporium of storage tank after the thermopile sensor is embedded in the storage tank, can make the infrared ray of thermopile sensor normally to indoor transmission again through the slotted hole of storage tank, carry out the formation of image and detect.

In an embodiment of the utility model, the accommodating groove is opened at an eccentric position of the bottom wall of the housing.

So set up, the thermopile sensor can set up in through the storage tank the eccentric position of casing diapire makes fire detector equipment overall structure compacter when guaranteeing the thermopile sensor protected, saves equipment occupation space.

In one embodiment of the utility model, the light-emitting detection surface of the thermopile sensor is flush with the bottom wall of the housing.

So set up, the infrared ray of thermopile sensor's light-emitting detection face transmission can not be sheltered from by the casing, and then can improve infrared detection area, avoids the check point to appear omitting to cause the conflagration condition can not in time discover.

In one embodiment of the utility model, the smoke sensor adopts a red-blue two-transmitting one-receiving labyrinth detection cavity.

So set up, red blue two send out the maze of one receipts design and survey the chamber and can improve the induction rate and the precision of smoke sensor response smog, can improve fire detector's detection stability by a wide margin.

Drawings

FIG. 1 is a schematic structural view of a fire detector provided in the present invention;

FIG. 2 is a schematic cross-sectional view of the fire detector of FIG. 1 at a first viewing angle in accordance with the present invention;

FIG. 3 is a schematic cross-sectional view of the fire detector of FIG. 1 at a second viewing angle in accordance with the present invention;

FIG. 4 is a schematic view of the fire detector of FIG. 1 illustrating a detection range at a second viewing angle.

100. A fire detector; 10. a housing; 11. mounting a shell; 12. a cigarette inlet shell; 121. a containing groove; 122. a smoke inlet hole; 13. a sound outlet hole; 20. a smoke sensor; 21. a labyrinth detection chamber; 30. a thermistor probe; 31. a connecting end; 32. a probe end; 40. a thermopile sensor; 50. pressing a key; 60. and an indicator light.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

It will be understood that when an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

The existing fire detector detects whether a fire disaster occurs or not through a photoelectric smoke sensor and a temperature sensor, and further reduces the false alarm phenomenon caused by insects and ambient light through a physical structure design, such as forming a semi-closed environment; however, the temperature sensing precision of the common temperature sensor is low, and the existing photoelectric smoke sensor cannot effectively judge dust accumulation or water vapor and the like, so that the phenomenon of false alarm of a fire detector is difficult to avoid, and manpower and material resources are easily wasted greatly.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a fire detector according to the present invention. The present invention provides a fire detector 100 for detecting whether a fire occurs in a building. It is to be understood that the present invention provides a fire detector 100 that is not limited to use inside a building.

Referring to fig. 1 again and fig. 2, fig. 2 is a schematic cross-sectional view of a first view angle of the fire detector 100 of fig. 1 according to the present invention. Comprising a housing 10, a smoke sensor 20, at least one thermistor probe 30, at least one thermopile sensor 40, and a controller (not shown); wherein the smoke sensor 20, the thermistor probe 30 and the thermopile sensor 40 are all disposed on the housing 10, and the controller is communicably connected to the smoke sensor 20, the thermistor probe 30 and the thermopile sensor 40 for triggering an alarm when the smoke sensor 20, the thermistor probe 30 and the thermopile sensor 40 all detect a fire signal.

According to the fire detector 100 provided by the utility model, after the smoke sensor 20, the thermistor probe 30 and the thermopile sensor 40 all detect fire signals, the fire signals can be finally transmitted to an alarm system through the controller to trigger an alarm, so that the fire false alarm phenomenon caused by other conditions such as dust, water vapor or winged insects is effectively avoided, and the detection accuracy of the fire detector 100 is greatly improved.

It will be appreciated that the thermistor probe 30 can be an NTC probe or a PTC probe, and preferably, in this embodiment, the thermistor probe 30 is an NTC probe.

It is understood that in the present invention, the smoke sensor 20, the thermistor probe 30 and the thermopile sensor 40 may be operated simultaneously or sequentially in a certain order, and the controller can trigger an alarm to enable a person to find a fire if all three detect a fire signal.

Preferably, in this embodiment, when the smoke sensor 20 detects a fire signal, the controller controls the thermistor probe 30 to perform temperature detection; and after the thermistor probe 30 detects a fire signal, the controller controls the thermopile sensor 40 to perform imaging detection to trigger an alarm after the fire signal is detected.

With such arrangement, after the smoke sensor 20 senses smoke, the controller can sequentially trigger the thermistor probe 30 and the thermopile sensor 40, detect the temperature of the smoke or the ambient air flow by using the thermistor probe 30, and eliminate the false alarm phenomenon caused by water vapor or dust; then, infrared imaging is carried out by using the high-precision temperature-sensing thermopile sensor 40, the ambient temperature in the infrared coverage range is detected, and false alarm caused by smoke or ambient light generated in smoke extraction and other non-fire conditions is avoided; therefore, the detection accuracy can be effectively ensured, and the condition that the detection efficiency is reduced due to disordered detection sequences can be avoided.

Further, in this embodiment, the housing 10 includes a mounting shell 11 and a smoke inlet shell 12 connected to each other, the labyrinth detection cavity 21 of the smoke sensor 20 is coaxially arranged with the smoke inlet shell 12, and a flow passage is formed between the labyrinth detection cavity 21 and the smoke inlet shell 12. With the arrangement, the split mounting shell 11 and the smoke inlet shell 12 can respectively play different roles, and the fire detector 100 can be mounted on a wall body through the outer wall of the mounting shell 11 and can also accommodate and mount other elements through the mounting shell 11; the labyrinth detection cavity 21 of the smoke sensor 20 is positioned in the smoke inlet shell 12 and is coaxially arranged with the smoke inlet shell 12, so that smoke entering from the smoke inlet shell 12 can timely fill a flow channel to cover the labyrinth detection cavity 21, and the detection speed of the smoke sensor 20 is improved.

Preferably, in this embodiment, the smoke inlet housing 12 is rotatably and detachably connected to the mounting housing 11, the smoke inlet housing 12 is provided with an air inlet grille with a uniform distribution plate, specifically, the smoke inlet housing 12 is provided with a plurality of smoke inlet holes 122 uniformly distributed, and the smoke inlet holes 122 can ensure that smoke can smoothly enter the smoke inlet housing 12 and be detected by the labyrinth detection cavity 21 of the smoke sensor 20 when a fire occurs. It will be appreciated that the smoke inlet 122 also enables airflow or the like into the smoke inlet housing 12.

Specifically, in this embodiment, the thermistor probe 30 includes a connecting end 31 and a detecting end 32, the connecting end 31 is fixedly connected to the mounting shell 11, and the detecting end 32 is suspended in the flow channel. With the arrangement, the detection end 32 of the thermistor probe 30 is suspended in the flow channel formed by the smoke inlet shell 12 and the labyrinth detection cavity 21 of the smoke sensor 20, smoke or air current caused by fire can be ensured to smoothly flow through the detection end 32, and the detection efficiency of the detection end 32 is improved.

Preferably, the probe end 32 is suspended at an axially central location of the flow passage. With this arrangement, the smoke or air flow entering from the smoke inlet housing 12 can flow or wrap the detection end 32 of the thermistor probe 30, so that the detection end 32 can detect the smoke temperature or air flow temperature in the environment more accurately and rapidly.

Preferably, in one embodiment of the present invention, the thermistor probe 30 is provided in plurality, and the plurality of thermistor probes 30 are disposed in the smoke inlet housing 12 in an axisymmetric manner. So set up, the thermistor probe 30 that a plurality of axisymmetrics set up can detect the smog that advances the different sides of cigarette case 12 and get into respectively, realizes smog temperature or air current temperature among the three hundred sixty degrees all-round detection ring border, promotes conflagration detection speed and accuracy.

It is understood that in other embodiments of the present invention, the arrangement of the plurality of thermistor probes 30 is not limited as long as it can ensure effective detection of smoke temperature or air flow temperature in the environment. For example, in the present embodiment, it is preferable that the number of the thermistor probes 30 is two, two thermistor probes 30 are axisymmetrically arranged at 180 ° on both sides of the labyrinth detection cavity 21, and the height of the detection end 32 of the two thermistor probes 30 is set to be flush with the central position of the labyrinth, so as to ensure that eight airflows and smoke in different directions can flow through the detection end 32.

Referring to fig. 1 again and also to fig. 3, fig. 3 is a schematic cross-sectional view of a second view angle of the fire detector 100 of fig. 1 according to the present invention; preferably, the bottom wall of the housing 10 is provided with a containing groove 121; more preferably, in the present embodiment, the accommodating groove 121 is opened at the bottom wall of the smoke inlet housing 12, and the thermopile sensor 40 is embedded in the accommodating groove 121. So set up, can enough protect the thermopile through the perisporium of storage tank 121 after thermopile sensor 40 inlays in storage tank 121, can make thermopile sensor 40's infrared ray normally to indoor transmission through the slotted hole of storage tank 121 again, do not influence it and carry out the formation of image and detect.

Preferably, the light-emitting detection surface of the thermopile sensor 40 is flush with the bottom wall of the case 10. Preferably, in the present embodiment, the light-emitting detection surface of the thermopile sensor 40 is flush with the bottom wall of the smoke-inlet housing 12. So set up, the infrared ray of thermopile sensor 40's light-emitting detection face transmission can not be sheltered from by casing 10, and then can improve infrared detection area, avoids the check point to appear omitting to cause the conflagration condition can not in time discover. It is understood that in other embodiments, the light-emitting detection surface of the thermopile sensor 40 may protrude from the bottom wall of the housing 10 as long as the normal detection function of the thermopile sensor 40 is not affected.

Preferably, in this embodiment, the accommodating groove 121 is opened at an eccentric position of the bottom wall of the housing 10. So set up, thermopile sensor 40 can set up in through storage tank 121 the eccentric position of casing 10 diapire makes fire detector 100 equipment overall structure compacter when guaranteeing that thermopile sensor 40 is protected, saves equipment occupation space.

Preferably, in this embodiment, the smoke sensor 20 adopts the red-blue two-sending one-receiving labyrinth detection cavity 21, and compared with the existing photoelectric smoke-sensing fire detector 100, the red-blue two-sending one-receiving labyrinth detection cavity can improve the smoke sensing speed and accuracy of the smoke sensor, and greatly improve the detection stability of the fire detector.

Referring to fig. 2 and 3 together with fig. 4 again, fig. 4 is a schematic view of a detection range of the fire detector 100 of fig. 1 under a second viewing angle according to the present invention. Preferably, in this embodiment, the thermopile sensor 40 adopts a 110 × 75 ° field angle, and can cover and monitor a space of 30 square meters in all directions according to a height of 2.7m, so as to meet the use requirements of normal families, and at the same time, the thermopile sensor adopts a 1MHz communication frequency, so that the minimum temperature detection precision reaches ± 0.1 ℃, and the temperature measurement area can cover-40 ° to 300 °, so as to improve the detection precision and greatly reduce the false alarm rate of fire. It is understood that in other embodiments, other specifications of thermopile sensor 40 may be employed depending on the actual application scenario and area.

Preferably, in this embodiment, the fire detector further includes an alarm device, not shown, disposed in the housing 10, and electrically connected to the controller. So set up smoke sensor 20 when thermistor probe 30 and thermopile sensor 40 all detected fire signal, the controller can give the alarm with fire signal synchronous transfer, sends out the police dispatch newspaper through the alarm, reminds personnel to inactivate or evacuate.

Preferably, in the present embodiment, the casing 10 is provided with a sound outlet 13 corresponding to the position of the alarm. So set up, can increase the alarm volume of alarm, more effectual warning conflagration takes place regional personnel and puts out a fire or withdraw. In this embodiment, it is preferable that the alarm is provided in the mounting case 11, and the sound emitting hole 13 is opened in the mounting case 11.

Preferably, in this embodiment, the mounting case 11 is further provided with a key 50 and an indicator light 60, the key 50 is used for turning on and off or detecting the fire detector 100, and the indicator light 60 is used for indicating whether the fire detector 100 is operating normally.

According to the utility model, when a fire signal is detected by the labyrinth detection cavity 21 of the smoke sensor 20, the controller can send an instruction to the thermistor probe 30 which is in communication connection with the controller, the thermistor probe 30 is triggered to compositely detect the smoke temperature or the air flow temperature nearby, when the thermistor probe 30 also detects the fire signal, the controller can send an instruction to the thermopile sensor 40 to trigger the thermopile sensor 40 to carry out infrared imaging detection, only when the three detect the fire signal, the controller can send the fire signal to the alarm system to trigger an alarm, so that background personnel can receive the fire situation to process in time, and meanwhile, the alarm electrically connected with the controller can send an alarm sound to remind personnel nearby a fire scene to evacuate rapidly or prepare for fire extinguishing.

According to the fire detector 100 provided by the utility model, on the basis that the photoelectric smoke sensor monitors fire, aiming at the false alarm phenomenon under various different scenes, the temperature measuring function of the thermistor probe 30 and the infrared imaging function of the thermopile sensor 40 are integrated, the fire alarm signal sent by the smoke sensor 20 is detected and analyzed again, the interference of other environmental factors is eliminated, when the three detect the fire signal, the fire is judged to be in place, the fire condition is judged with higher precision, the false alarm rate is greatly reduced, and the fire detection precision is improved.

The features of the above-described embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the features in the above-described embodiments are not described, but should be construed as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the features.

It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that suitable changes and modifications of the above embodiments are within the scope of the claimed invention as long as they are within the spirit and scope of the present invention.

Claims

1. A fire detector comprising a housing (10), a smoke sensor (20), at least one thermistor probe (30), at least one thermopile sensor (40), and a controller; wherein the smoke sensor (20), the thermistor probe (30) and the thermopile sensor (40) are all disposed on the housing (10), and the controller is communicably connected to the smoke sensor (20), the thermistor probe (30) and the thermopile sensor (40) for triggering an alarm when the smoke sensor (20), the thermistor probe (30) and the thermopile sensor (40) all detect a fire signal.

2. A fire detector as claimed in claim 1, wherein the controller controls the thermistor probe (30) to perform temperature detection when the smoke sensor (20) detects a fire signal; and after the thermistor probe (30) detects a fire signal, the controller controls the thermopile sensor (40) to perform imaging detection to trigger an alarm after the fire signal is detected.

3. A fire detector as claimed in claim 1, characterised in that the housing (10) comprises a mounting shell (11) and a smoke inlet shell (12) which are connected to each other, the labyrinth detection chamber (21) of the smoke sensor (20) is arranged coaxially with the smoke inlet shell (12), and a flow passage is formed between the labyrinth detection chamber (21) and the smoke inlet shell (12).

4. A fire detector as claimed in claim 3, characterised in that the thermistor probe (30) comprises a connecting end (31) and a sensing end (32), the connecting end (31) being secured to the mounting housing (11), the sensing end (32) being suspended within the flow passage.

5. A fire detector as claimed in claim 4, characterised in that the detection end (32) is suspended in an axially central position in the flow passage.

6. A fire detector as claimed in claim 3, characterised in that the thermistor probe (30) is plural, the plural thermistor probes (30) being arranged axisymmetrically in the flow passage.

7. The fire detector according to claim 1, wherein a receiving groove (121) is formed in a bottom wall of the housing (10), and the thermopile sensor (40) is embedded in the receiving groove (121).

8. A fire detector as claimed in claim 7, characterised in that the receiving slot (121) opens at an eccentric position to the bottom wall of the housing (10).

9. A fire detector as claimed in claim 1, characterised in that the light exit detection face of the thermopile sensor (40) is flush with the bottom wall of the housing (10).

10. A fire detector as claimed in claim 1, characterised in that the smoke sensor (20) employs a red-blue two-fire one-catch labyrinth detection chamber (21).