TWM508745U - Fire alarm detector easily determining disconnected location - Google Patents

Description

Fire detector that is easy to judge the position of the broken wire

The invention relates to a fire detector, in particular to a fire detector which is easy to judge the position of the broken line.

For safety reasons, many community buildings or factories currently have fire alarm systems. The common fire alarm system consists of a trusted switchboard, several fire detectors installed on each floor, in each room, and connected to the trusted switchboard. Several alarms controlled by the trusted switchboard.

Among them, the fire detectors are most commonly used for detecting smoke. When the smoke concentration detected by any fire detector reaches a set value, the fire detector forms a short circuit condition and sends a warning signal to return the signal. The trusted switchboard, driven by the non-false positives, drives the alarms to sound and reminds the attendees to evacuate.

However, the line of the fire alarm system may be disconnected due to oldness. When a line breaks in one of the lines, all the fire detectors at the broken line with the trusted switchboard form an open circuit. State, and the maintenance personnel can only know that several fire detectors in a certain area are abnormal through the trusted switchboard, and because the line is usually concealed by the ceiling, the actual position of the disconnection cannot be confirmed, so that the maintenance personnel must visit the scene. Measuring all fire detectors in anomalous areas, which is not only time consuming and labor intensive, but also due to the high floor height of the factory, when the fire in the factory When the above situation occurs in the disaster warning system, the maintenance personnel are more likely to be in danger during the measurement process.

Therefore, the purpose of the present invention is to provide a fire detector that is easy to maintain and has high safety and easy to judge the position of the broken wire.

Therefore, the fire detector of the present invention which is easy to determine the position of the disconnection comprises a housing unit, an electrode unit, a sensing unit and a warning unit.

The housing unit includes a fixing base and a movable seat detachably mounted on the fixing base.

The electrode unit includes a pair of fixed electrodes spaced apart from the fixing seat.

The sensing unit includes a circuit board disposed on the movable base and electrically connectable to the fixed electrodes, and a sensor disposed on the circuit board.

The warning unit includes a fire warning light disposed at an outer side of the fixed seat and a disconnection warning light spanning the fixed electrodes. When the power is turned on, the disconnection warning light is always in a light state. .

The utility model has the advantages that: by setting the disconnection warning light, when the line in the fire alarm system is disconnected, the disconnection warning light is in a light-off state, and the maintenance personnel can quickly judge the disconnection position. In turn, it is easy to maintain and has high safety.

2‧‧‧Sheet unit

21‧‧‧ Fixed seat

22‧‧‧ activity seat

221‧‧‧ Ontology

222‧‧‧ Cover

223‧‧‧ Cover

224‧‧ ‧ smoke guide hole

3‧‧‧Electrode unit

31‧‧‧Fixed electrode

311‧‧‧Contacts

32‧‧‧Metal fasteners

33‧‧‧Contact electrode

4‧‧‧Sensor unit

41‧‧‧ boards

42‧‧‧ Sensor

421‧‧‧ base wall

422‧‧ ‧ visor

423‧‧‧Insect net

424‧‧‧Lighting elements

425‧‧‧Light-receiving components

5‧‧‧Warning unit

51‧‧‧Fire warning light

52‧‧‧Disconnection warning light

8‧‧‧Factory

9‧‧‧Fire alarm system

91‧‧‧Fire detector

92‧‧‧trusted switchboard

93‧‧‧ terminating resistor

94‧‧‧Fire control panel

941‧‧‧ bell

Other features and effects of the present invention will be apparent from the following description of the drawings. FIG. 1 is a perspective view showing an embodiment of the fire detector of the present invention which is easy to determine the position of the broken line; Figure 3 is a top plan view showing a pair of contact electrodes of the embodiment; Figure 4 is a bottom view showing a pair of fixed electrodes of the embodiment; Figure 5 is a bottom view, A sensing unit of the embodiment is illustrated; FIG. 6 is a schematic diagram showing a plurality of fire detectors of the same embodiment applied to a fire alarm system of a factory; FIG. 7 is a circuit diagram illustrating the same The circuit connection mode between the fire detector and one of the trusted circuits of the trusted switchboard; and FIG. 8 is a schematic diagram showing the situation when the line of the fire alarm system is disconnected.

Referring to FIG. 1 to FIG. 5 , an embodiment of the fire detector of the present invention for determining the position of the disconnection comprises a housing unit 2 , an electrode unit 3 , a sensing unit 4 and a warning unit 5 .

The housing unit 2 includes a fixing base 21 and a movable seat 22 detachably mounted on the fixing base 21. Preferably, the movable base 22 has a body 221 and a detachable mounting body 221 Cover 222.

The cover 222 has a cover 223 detachably mounted on the body 221 and a plurality of smoke guiding holes 224 formed in the cover 223.

The electrode unit 3 includes a pair of spacers disposed on the fixing seat 21 And a fixed electrode 31 having two contacts 311, a pair of metal fasteners 32 respectively disposed on the fixing base 21 and connected to the fixed electrodes 31, and a pair of tops of the body 221 disposed on the movable seat 22. Contact electrodes 33 that are respectively engageable with the metal fasteners 32.

The sensing unit 4 includes a circuit board 41 disposed on the body 221 of the movable base 22 and connected to the contact electrodes 33, and a sensor 42 disposed on the circuit board 41.

When the movable seat 22 is rotatably engaged with the fixed seat 21, the contact electrodes 33 are engaged with the metal fasteners 32, thereby fixing the fixed seat 21 and the movable base 22, and the circuit board 41 is fixed. The contact electrodes 33, the metal fasteners 32, and the fixed electrodes 31 are electrically connected (see FIG. 7).

The sensor 42 has a base wall 421 disposed on the circuit board 41, a plurality of light shielding plates 422 spaced apart along the periphery of the base wall 421, and a pest guard disposed on the base wall 421 and surrounding the light shielding plates 422. The net 423 and a light-emitting element 424 and a light-receiving element 425 are disposed on the base wall 421 and connected to the circuit board 41, and the light-receiving element 425 is not located in the light source path of the light-emitting element 424.

In this embodiment, the light-emitting element 424 is an infrared light-emitting diode, and the light-receiving element 425 is an infrared-receiving diode, but is not limited thereto.

The warning unit 5 includes a fire warning light 51 disposed outside the fixed seat 21 and a disconnection warning light 52 spanning the fixed electrodes 31. The two ends of the fire warning light 51 are respectively fixed to the fixed electrode 31 and one of the metal fasteners 32 are connected.

In this embodiment, the light source of the fire warning light 51 is red light, and the light source of the disconnection warning light 52 is green light, but not limited thereto.

When the smoke enters the sensor 42 through the smoke guiding holes 224 of the outer cover 222, the infrared rays emitted by the light emitting element 424 are refracted by the interference of the smoke, and are received by the light receiving element 425 when the smoke concentration reaches. When a set value is reached, a short circuit condition is formed and a fire alarm signal is issued. .

Referring to FIG. 1 and FIG. 6 to FIG. 8, when a fire alarm system 9 is disposed in a factory 8, a plurality of fire detectors 91 identical to the embodiment are connected in series, and then connected to a receiver switchboard 92, and connected at the end of the line. The last high resistance value (10K Ω) of the terminating resistor 93 is preferably connected to a plurality of fire alarm control panels 94 of different floors or areas. When a fire alarm occurs, the trusted switchboard 92 drives the fire alarm control. The bell 941 of the disc 94 sounds, and the fire warning light 51 of each fire detector 91 is continuously blinking, and in the normal condition that no fire alarm occurs, the disconnection warning light 52 of each fire detector 91 It is connected to the fixed electrode 31, and therefore, the disconnection warning lamp 52 is always in a lit state.

However, in the case where there is no fire alarm, the line of the fire alarm system 9 may still be broken due to old or rat bites. At this time, all the circuits with the trusted switchboard 92 pass through the disconnection. The fire detector 91 forms a disconnected state, and the current cannot flow through the disconnection warning lamps 52, so that the disconnection warning lamps 52 are changed from the lighting state to a light-off state, and the trusted switchboard 92 is driven to display an abnormality. Condition occurs, at this time, repair The person through the trusted switchboard 92 can learn that an abnormality occurs in several fire detectors 91 in a certain area. When arriving at the scene, the state of each disconnection warning light 52 in the abnormal area can be directly observed through the naked eye, and thereby Judging the disconnection position between the fire detector 91 that is turned on and the fire detector 91 that is turned off, even if the line is concealed by the ceiling, it is not affected, and the fire detector 91 is not required to be measured one by one, thereby improving Safety during maintenance.

In summary, the present invention provides the disconnection warning lamp 52, and when the line in the fire alarm system 9 is disconnected, the disconnection warning lamp 52 changes from the lighting state to the light-off state. Thereby, the maintenance personnel can quickly judge the position of the broken wire through the naked eye, thereby achieving the effect of convenient maintenance and high safety, so that the purpose of the present invention can be achieved.

However, the above description is only for the embodiments of the present invention, and the scope of the present invention cannot be limited thereto, that is, the simple equivalent changes and modifications made by the present patent application scope and the contents of the patent specification are still It is within the scope of this new patent.

2‧‧‧Sheet unit

21‧‧‧ Fixed seat

22‧‧‧ activity seat

221‧‧‧ Ontology

222‧‧‧ Cover

223‧‧‧ Cover

224‧‧ ‧ smoke guide hole

4‧‧‧Sensor unit

41‧‧‧ boards

42‧‧‧ Sensor

423‧‧‧Insect net

5‧‧‧Warning unit

51‧‧‧Fire warning light

52‧‧‧Disconnection warning light

Claims (8)

A fire detector capable of judging a broken position includes: a housing unit including a fixing base and a movable seat detachably mounted on the fixing base; and an electrode unit including a pair of spacers disposed on the fixing seat a sensing unit, comprising: a circuit board disposed on the movable base and electrically connectable to the fixed electrodes; and a sensor disposed on the circuit board; and a warning unit, including a spacing device A fire warning light outside the fixed seat and a disconnection warning light bridging the fixed electrodes, when disconnected from a trusted switchboard, the disconnection warning light is always in a light state. The fire detector of claim 1, wherein the movable seat has a body and a cover detachably mounted on the body, and the sensing unit is disposed on the body of the movable seat. The fire detector of claim 2, wherein the sensor has a base wall disposed on the circuit board, and a plurality of light shielding plates disposed along the periphery of the base wall, and a And a light-receiving element and a light-receiving element which are disposed on the base wall and are connected to the circuit board and are connected to the circuit board, and the light-receiving element is not located in the light source path of the light-emitting element. The fire detector of claim 3, wherein the light-emitting element is an infrared light-emitting diode, and the light-receiving element is an infrared light receiving diode. The fire detector of claim 2, wherein the electrode unit further comprises a pair of metal fasteners disposed on the fixing base and respectively connected to the fixed electrodes, and a pair is disposed on the The top surface of the movable base of the movable base and the contact electrodes respectively engageable with the metal fasteners, and the contact electrodes are connected to the circuit board. The fire detector of claim 5, wherein the two ends of the fire warning light are respectively connected to one of the fixed electrodes and one of the metal fasteners. The fire detector of claim 2, wherein the outer cover has a cover detachably mounted to the body, and a plurality of smoke guiding holes formed in the cover. The fire detector of claim 1 is characterized in that the light source of the fire warning light is red light, and the light source of the broken warning light is green light.