CN216352714U

CN216352714U - Automatic fire alarm

Info

Publication number: CN216352714U
Application number: CN202123034546.3U
Authority: CN
Inventors: 林少尤; 林涌祥; 唐尧
Original assignee: Guangdong Weizhong Fire Science And Technology Co ltd
Current assignee: Guangdong Weizhong Fire Science And Technology Co ltd
Priority date: 2021-12-03
Filing date: 2021-12-03
Publication date: 2022-04-19
Anticipated expiration: 2031-12-03

Abstract

The utility model discloses an automatic fire alarm which comprises a smoke alarm, a sealing cover and a differential temperature supporting seat, wherein the smoke alarm comprises a detector and a shell, the detector, the sealing cover and the differential temperature supporting seat are all arranged in the shell, the detector is arranged at the top of the shell, and the sealing cover covers the detector, so that the detector is isolated from the outside air, dust, oil mist and the like in the air are prevented from being deposited on the surface of the detector, and the cleaning times of the alarm are reduced. The differential temperature supporting seat is arranged at the bottom of the sealing cover to support the sealing cover so as to prevent the sealing cover from falling. Because the conflagration takes place, external environment temperature variation rate is very fast, and the difference temperature supporting seat can respond to external temperature's the situation of change, if external temperature's variation rate is too fast, the difference temperature supporting seat can descend automatically to make the sealed cowling move down and expose the detector, can detect smog concentration through the detector, and judge whether send alarm signal according to the change of smog concentration.

Description

Automatic fire alarm

Technical Field

The utility model relates to the technical field of fire alarm by smoke, in particular to an automatic fire alarm.

Background

The smoke alarm is fire-fighting equipment for realizing fire alarm by monitoring indoor smoke concentration, and comprises a detector and a shell, wherein the detector is arranged in the shell and can detect the change condition of the smoke concentration entering the shell and judge whether to send an alarm signal according to the change condition of the smoke concentration. The existing smoke alarm generally adopts an optical detector to detect smoke concentration, and the detector is exposed in the air for a long time, so that dust, oil mist and the like in the air can be deposited on optical components of the optical detector, and the detection sensitivity of the detector is reduced. In order to ensure that the smoke alarm can work normally, the smoke alarm needs to be cleaned regularly, and more smoke alarms are installed on a building and need to be cleaned by more manpower.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides the automatic fire alarm which can isolate the detector from the outside at ordinary times and prevent dust, oil mist and the like in the air of the detector from being deposited on the surface of the detector. The specific technical scheme is as follows:

an automatic fire alarm, in a first implementable form, comprising:

the smoke alarm comprises a detector and a shell, wherein the detector is hung in the shell;

the sealing cover is arranged in the shell and covers the detector;

the differential temperature supporting seat is arranged at the bottom of the sealing cover, and can automatically descend when the indoor temperature changes to exceed a certain degree.

With reference to the first implementable manner, in a second implementable manner, the differential temperature support base includes:

the air bag is arranged at the bottom of the sealing cover;

the heat sensing chamber is arranged at the bottom of the air bag and is communicated with the outside through an air plug bolt, and the top of the heat sensing chamber is provided with a vent hole;

the corrugated diaphragm is hermetically arranged in the vent hole;

and the puncture needle is placed in the vent hole, and the needle point faces the air bag.

With reference to the second implementable mode, in a third implementable mode, the housing comprises an upper half shell and a lower half shell, and the upper half shell and the lower half shell are detachably connected.

In combination with the first implementation manner, in a fourth implementation manner, the temperature difference support device further comprises a prompter, wherein the prompter is used for detecting whether the temperature difference support seat descends, and when the temperature difference support seat descends, the prompter sends a prompt signal.

With reference to the fourth implementable manner, in a fifth implementable manner, the prompter includes a proximity switch indicator, the proximity switch indicator is disposed on the housing, and when the differential temperature supporting seat descends, the proximity switch indicator sends a prompt signal.

Has the advantages that: by adopting the automatic fire alarm, a sealing barrier can be formed outside the detector through the arranged sealing cover at ordinary times, the detector is isolated from being contacted with the outside, dust, oil mist and the like in the air are prevented from being deposited on the surface of the detector, the detection precision is prevented from being influenced, and the cleaning times of the detector are reduced. When a fire disaster happens, the indoor temperature change condition can be sensed through the arranged differential temperature supporting seat, and when the indoor temperature change exceeds a certain degree, the differential temperature supporting seat can automatically descend, so that the detector is in contact with the outside to detect the smoke concentration in the air, and an alarm is timely given.

Drawings

In order to more clearly illustrate the embodiments of the present invention, the drawings, which are required to be used in the embodiments, will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.

Fig. 1 is a schematic structural view of an automatic fire alarm provided in an embodiment of the present invention;

FIG. 2 is a schematic view showing a normal state of the automatic fire alarm apparatus shown in FIG. 1;

FIG. 3 is a schematic view of the automatic fire alarm of FIG. 1 illustrating a fire condition;

FIG. 4 is a front view of the automatic fire alarm of FIG. 3;

reference numerals:

1-detector, 2-shell, 3-sealing cover, 4-differential temperature support seat, 5-air bag, 6-heat sensing chamber, 7-air plug bolt, 8-corrugated diaphragm, 9-air vent, 10-puncture needle, 11-upper half shell, 12-lower half shell, 13-indicator light and 14-Hall proximity switch.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

The automatic fire alarm device shown in fig. 1 is a schematic structural diagram, and comprises:

the smoke alarm comprises a detector 1 and a shell 2, wherein the detector 1 is hung in the shell 2;

the sealing cover 3 is arranged in the shell 2 and covers the detector 1;

and the differential temperature supporting seat 4 is arranged at the bottom of the sealing cover 3, and when the indoor temperature change exceeds a certain degree, the differential temperature supporting seat 4 can automatically descend.

Specifically, as shown in fig. 1-4, the alarm comprises a smoke alarm, a sealing cover 3 and a differential temperature support seat, the smoke alarm comprises a detector 1 and a shell 2, a plurality of air inlets can be formed in the side wall of the shell 2, and the interior of the shell 2 is communicated with the outside through the air inlets. The detector 1, the sealing cover 3 and the differential temperature supporting seat can be arranged in the shell 2, wherein the detector 1 can be arranged at the top of the shell 2, and the sealing cover 3 covers the detector 1, so that the detector 1 is isolated from the outside air, and dust, oil mist and the like in the air are prevented from being deposited on the surface of the detector 1, and the cleaning times of the alarm are reduced.

The differential temperature supporting seat is arranged at the bottom of the sealing cover 3 to support the sealing cover 3 so as to prevent the sealing cover 3 from falling. Because when the conflagration took place, external environment temperature variation speed is very fast, and the difference temperature supporting seat can respond to external temperature's the situation of change, if external temperature's the rate of change is too fast, difference temperature supporting seat 4 can descend automatically to make sealed cowling 3 downstream expose detector 1, can detect smoke concentration through detector 1, and judge whether send alarm signal according to smoke concentration's change volume.

In this embodiment, optionally, the differential temperature support seat 4 includes:

an airbag 5 provided at the bottom of the sealing cover 3;

the heat sensing chamber 6 is arranged at the bottom of the air bag 5 and is communicated with the outside through an air plug bolt 7, and the top of the heat sensing chamber 6 is provided with a vent hole 9;

the corrugated membrane 8 is hermetically arranged in the vent hole 9;

and a puncture needle 10 which is placed in the vent hole 9, and the needle point faces the air bag 5.

Specifically, the differential temperature support 4 includes an air bag 5 and a heat-sensitive chamber 6, wherein the heat-sensitive chamber 6 is a sealed cavity and is disposed below the sealing cover 3, and the air bag 5 is disposed between the heat-sensitive chamber 6 and the sealing cover 3. The air bag 5 can jack up the sealing cover 3 after being expanded, so that the detector 1 is isolated from the outside. The top of the heat sensing chamber 6 is provided with an air plug bolt 7, the heat sensing chamber 6 is communicated with the outside through the air plug bolt 7, the temperature of the outside environment changes slowly at ordinary times, and the air pressure in the heat sensing chamber 6 can be kept balanced with the outside.

A vent hole 9 is also formed in the top of the heat sensing chamber 6 along the vertical direction, a puncture needle 10 is placed in the vent hole 9, the needle tip of the puncture needle 10 vertically faces upwards to the air bag 5, a corrugated membrane 8 is arranged at the needle tail, and the vent hole 9 is sealed by the corrugated membrane 8. In the event of a fire, the external temperature is transmitted to the heat-sensitive chamber 6, and the air in the heat-sensitive chamber 6 is heated and expanded so as not to be discharged from the air plug bolt 7, thereby increasing the air pressure in the heat-sensitive chamber 6.

The corrugated diaphragm 8 is bulged upwards under the action of air pressure, the puncture needle 10 in the vent hole 9 is pushed out of the vent hole 9 to puncture the air bag 5, so that air in the air bag 5 leaks, the air bag 5 is gradually reduced along with the air leakage, and the sealing cover 3 moves downwards to expose the detector 1 to detect the smoke concentration.

In this embodiment, the housing 2 may optionally include an upper half shell 11 and a lower half shell 12, and the upper half shell 11 may be detachably connected to the lower half shell 12.

In particular, the housing 2 may be composed of an upper and a lower half, wherein the upper half 11 and the lower half 12 may be screwed together. After the fire has been extinguished, the upper half-shell 11 and the lower half-shell 12 can be detached in order to replace the punctured airbag 5.

In this embodiment, optionally, the temperature difference supporting seat further includes a reminder, the reminder is used for detecting whether the temperature difference supporting seat 4 descends, and when the temperature difference supporting seat descends, the reminder sends a prompt signal.

Particularly, the alarm can also be provided with a prompter, the prompter can detect whether the differential temperature supporting seat 4 descends, and if the prompter detects that the differential temperature supporting seat 4 descends, a prompt signal is sent to prompt a worker to replace the air bag 5 in the alarm.

In this embodiment, optionally, the indicator includes a proximity switch indicator, the proximity switch indicator is disposed on the housing 2, and when the differential temperature support seat descends, the proximity switch indicator sends an indication signal.

Specifically, the prompter comprises a proximity switch indicator light which can be a Hall proximity switch indicator light, wherein the indicator light 13 is embedded on the outer surface of the shell 2 and is connected with a power supply through a Hall proximity switch 14. The two parts of the hall proximity switch 14 may seal the bottom of the housing 3, and the top of the heat sensing chamber 6, respectively. The sealing cover 3 moves downwards to enable the two parts of the Hall proximity switch 14 to approach, so that the Hall proximity switch 14 is closed, and the indicator lamp 13 is electrified and lightened to prompt a worker to replace the air bag 5.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims

1. An automatic fire alarm, comprising:

the sealing cover is arranged in the shell and covers the detector;

2. An automatic fire alarm according to claim 1 wherein the differential temperature support comprises:

the air bag is arranged at the bottom of the sealing cover;

the corrugated diaphragm is hermetically arranged in the vent hole;

3. An automatic fire alarm according to claim 2 wherein the housing comprises an upper half shell and a lower half shell, the upper half shell being removably connected to the lower half shell.

4. An automatic fire alarm according to claim 1 further comprising an alarm for detecting the drop in the differential temperature support, the alarm providing an alarm signal when the differential temperature support drops.

5. An automatic fire alarm according to claim 4 wherein the alarm includes a proximity switch indicator light disposed in the housing, the proximity switch indicator light emitting an alarm signal when the differential temperature support is lowered.