CN208014127U - A maintenance-free photoelectric smoke detector - Google Patents

Abstract

The utility model discloses a non-maintaining formula photoelectric type smoke detector, the on-line screen storage device comprises a base, the side of base is provided with a plurality of inlet ports, the base member is installed to the below of base, there is the motor inside of base member through the support mounting, the fan leaf is installed to the output of motor, fan leaf below is equipped with the safety cover, it has a plurality of ventholes to distribute on the safety cover, the safety cover is installed on the base member, the internally mounted of base member has the buzzer siren, install photosensitive element around the base member, be equipped with the monitoring room with outside intercommunication between base member and the bottom plate, install infrared light source on the bottom plate. The utility model discloses a fan blows off the dust of monitoring indoor portion for photosensitive element and infrared light source surface do not have the dust and adhere to, ensure that the monitoring of smoke detector is accurate, and the no personnel that need regularly tear down the clearance maintenance, convenient to use saves the cost of labor.

Description

A maintenance-free photoelectric smoke detector

technical field

The utility model relates to the technical field of smoke detectors, in particular to a maintenance-free photoelectric smoke detector.

Background technique

Photoelectric smoke detectors are also point detectors, which are developed by using the basic property that the smoke generated during a fire can change the propagation characteristics of light. According to the absorption and scattering of light by smoke particles. Photoelectric smoke detectors are divided into two types: shading type and astigmatism type. The general point type photoelectric smoke detector belongs to the astigmatism type, and the line beam detector is the shading type. The working principle of the photoelectric smoke detector is that a photosensitive electrode generates an electrical signal under laser irradiation. When the fire smoke covers the laser, the electrode loses power and sends out an alarm signal. The infrared light-emitting elements and photosensitive elements (photon receiving elements) of point-type photoelectric smoke detectors are usually arranged in a bias design in the detection chamber. The distance between the two is generally 20-25mm. Under normal smoke-free monitoring conditions, the sensitive element cannot receive any light, including the light emitted by the infrared light-emitting element. When smoke particles enter the detection chamber, the light emitted by the infrared light-emitting element is scattered or reflected by the smoke particles to the photosensitive element, and when sufficient light signals are received, a fire alarm is issued. This fire detection method is usually called smoke detection. scattered light method.

After the photoelectric smoke detector is used for a period of time, dust will enter the monitoring room, which will affect the judgment accuracy of the detector and even cause false alarms. The current maintenance method is to remove the photoelectric smoke detector, clean it, and then install it Debugging and calibration consumes a lot of labor costs.

Utility model content

The purpose of this utility model is to provide a maintenance-free photoelectric smoke detector to solve the problems raised in the above-mentioned background technology.

In order to achieve the above purpose, the utility model provides the following technical solutions: a maintenance-free photoelectric smoke detector, including a base, a number of air intake holes are arranged on the side of the base, a base is installed under the base, the The inside of the matrix is equipped with a motor through a bracket, the output end of the motor is equipped with a fan blade, a protective cover is provided under the fan blade, a number of air outlets are distributed on the protective cover, and the protective cover is installed on the substrate. A buzzer alarm is installed inside the base body, photosensitive elements are installed around the base body, a monitoring room communicating with the outside is set between the base body and the base plate, and an infrared light source is installed on the base plate.

Preferably, a processor is installed in the base plate, and the processor is electrically connected to the motor, the buzzer alarm, the photosensitive element and the infrared light source respectively.

Preferably, the base is provided with threaded mounting holes.

Preferably, the base body is provided with several waist holes, and the waist holes are opposite to the buzzer alarm inside.

Preferably, the infrared light source faces the photosensitive element.

Preferably, a cavity is provided in the base, and the motor and fan blades are located in the cavity.

Compared with the prior art, the utility model has the beneficial effects that: the utility model installs a fan driven by a motor in the base of the detector, the processor controls the motor to start regularly, and the rotating fan generates airflow to blow out the dust in the monitoring room , so that there is no dust on the surface of the photosensitive element and the infrared light source, ensuring accurate monitoring of the detector. There is no need for personnel to remove it regularly for cleaning and maintenance, which is convenient to use and saves labor costs.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic diagram of the external structure of the utility model.

In the figure: 1 base, 2 installation holes, 3 air intake holes, 4 substrate, 5 motor, 6 fan blades, 7 buzzer alarm, 8 waist hole, 9 chamber, 10 air outlet, 11 base plate, 12 processor, 13 infrared light source, 14 photosensitive element, 15 monitoring room.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Figure 1-2, the utility model provides a technical solution: a maintenance-free photoelectric smoke detector, including a base 1, a number of air inlets 3 are arranged on the side of the base 1, and the base 1 The base 4 is installed below, the inside of the base 4 is equipped with a motor 5 through a bracket, the output end of the motor 5 is equipped with a fan blade 6, a protective cover is provided below the fan blade 6, and a protective cover is distributed on the protective cover. Several air outlet holes 10, the protective cover is installed on the base body 4, a buzzer alarm 7 is installed inside the base body 4, photosensitive elements 14 are installed around the base body 4, between the base body 4 and the base plate 11 A monitoring room 15 communicating with the outside is provided, and an infrared light source 13 is installed on the bottom plate 11 .

Specifically, a processor 12 is installed in the base plate 11, and the processor 12 is electrically connected to the motor 5, the buzzer 7, the photosensitive element 14 and the infrared light source 13, respectively.

Specifically, the base 1 is provided with a threaded mounting hole 2 .

Specifically, the base body 4 is provided with several waist holes 8, and the waist holes 8 are opposite to the buzzer alarm 7 inside.

Specifically, the infrared light source 13 faces the photosensitive element 14 , and the photosensitive element 14 receives the infrared rays emitted by the infrared light source 13 .

Specifically, a chamber 9 is provided in the base body 4 , and the motor 5 and fan blades 6 are located in the chamber 9 .

Working principle: The utility model installs a motor 5 inside the base body 4. After the motor 5 is started, the fan blade 6 is driven to rotate. The rotating fan blade 6 sucks air from the air inlet hole 3 and blows it out from the air outlet hole 10 to blow the air into the monitoring chamber 15. The dust is blown out, so that there is no dust on the surface of the photosensitive element 14 and the infrared light source 13. When the utility model works, the infrared light source 13 emits infrared light, and the photosensitive element 14 receives the infrared light. When there is smoke, the smoke has the effect of absorbing and scattering the light. Function, the photosensitive element 14 receives the light signal and there is a change, the photosensitive element 14 feeds back the signal of smoke to the processor 12, and the processor 12 sends an alarm command to the buzzer alarm 7 after recognizing the signal, and then the buzzer alarm 7 sends out Alarm sound signal. If there is dust on the surface of the photosensitive element 14 and the infrared light source 13, it will seriously affect the accuracy of monitoring, and false alarms may occur.

In this utility model, unless otherwise specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes and modifications can be made to these embodiments without departing from the principle and spirit of the present invention , replacements and modifications, the scope of the present utility model is defined by the appended claims and their equivalents.

Claims (6)

1. A maintenance-free photoelectric smoke detector, comprising a base (1), characterized in that: the side of the base (1) is provided with some air inlets (3), and the bottom of the base (1) is installed There is a base body (4), the inside of the base body (4) is equipped with a motor (5) through a bracket, the output end of the motor (5) is equipped with a fan blade (6), and there is a fan blade (6) below the fan blade (6). A protective cover, a number of air outlets (10) are distributed on the protective cover, the protective cover is installed on the base (4), and a buzzer alarm (7) is installed inside the base (4), the base Photosensitive elements (14) are installed around (4), and a monitoring chamber (15) communicating with the outside is provided between the base body (4) and the base plate (11), and an infrared light source ( 13). 2. A maintenance-free photoelectric smoke detector according to claim 1, characterized in that: a processor (12) is installed in the base plate (11), and the processor (12) communicates with the motor ( 5), the buzzer alarm (7), the photosensitive element (14) and the infrared light source (13) are electrically connected. 3. A maintenance-free photoelectric smoke detector according to claim 1, characterized in that: the base (1) is provided with a threaded mounting hole (2). 4. A maintenance-free photoelectric smoke detector according to claim 1, characterized in that: the base (4) is provided with several waist holes (8), and the waist holes (8) are connected with the inner The buzzer alarm (7) is relatively. 5. A maintenance-free photoelectric smoke detector according to claim 1, characterized in that: the infrared light source (13) faces the photosensitive element (14). 6. A maintenance-free photoelectric smoke detector according to claim 1, characterized in that: the base (4) is provided with a chamber (9), the motor (5) and fan blades (6 ) is located in the chamber (9).