KR200374840Y1 - smoke alarm - Google Patents

Abstract

The present invention discloses a photoelectric fire detector that is simple in structure and easy to assemble and prevents malfunctions caused by electromagnetic waves, as well as external foreign substances such as dust and insects, and can greatly improve the sensing efficiency and precision of smoke particles in a fire. .

The photoelectric fire detector is provided with a case having a space portion through which external air can be introduced, and a sensor assembly installed inside the case to sense smoke particles in the air in a state where external foreign substances or electromagnetic waves can be blocked. And a buzzer installed inside the case and generating an alarm sound when smoke particles are detected by the sensor assembly, and an electric supply unit supplying electricity for the operation of the sensor assembly and the buzzer.

The sensor assembly may include a housing having a sensing space capable of circulating air in a state where light is blocked from the outside, and a sensing unit for sensing smoke particles in the air by emitting and receiving light in response to the sensing space of the housing. And a shielding opening installed to allow the electromagnetic wave to be blocked in response to the sensing unit in the housing, and a shielding member installed to block external foreign substances such as dust or insects in response to the sensing space of the housing.

Description

Photoelectric fire detector {smoke alarm}

The present invention relates to a photoelectric fire detector, which is simple in structure and easy to assemble, and also prevents malfunctions caused by electromagnetic waves, as well as external foreign substances such as dust or insects, and thus, sensing efficiency and precision of smoke particles in a fire. It relates to a photoelectric fire detector that can greatly improve the.

In general, fire detectors are interlocked detectors that operate in conjunction with centralized disaster prevention systems in large-scale buildings such as buildings or apartments, and individual units that operate individually in large-area buildings such as single-family houses or townhouses. There is a sensor of eclipse structure.

The interlocking and single fire detectors are broadly classified into a constant temperature detector that detects a room temperature according to a sensing method, and a photoelectric detector that detects smoke particles in a room by scattering light. After installation on the ceiling or wall to facilitate the sensing of temperature and smoke, fire is continuously detected, and when a fire occurs, it generates its own alarm sound so that people who stay indoors can respond quickly to the occurrence of fire.

The above-mentioned constant temperature detector not only consumes a lot of electricity, but also has a disadvantage in that it is difficult to obtain a uniform sensing efficiency, etc. according to the installed position, whereas the photoelectric detector consumes less electricity than the constant temperature detector. Since a uniform sensing efficiency can be obtained regardless of the installation location, such a photoelectric structure detector is widely used in recent years.

Briefly describing the general structure of the photoelectric sensor, a case having a space portion formed to allow the introduction of external air, a sensor assembly located in the space portion of the case for detecting smoke particles in the air in case of fire, and the case It is installed inside and includes an alarm unit for generating an alarm sound when the smoke particles are detected by the sensor assembly, and an electrical supply unit configured to enable the electricity supply for the operation of the sensor assembly and the alarm unit in the case.

The sensor assembly includes a housing having a dark room-type sensing space in which air is circulated in the state where external light is blocked, and smoke particles are emitted and light-received in response to the sensing space of the housing. It consists of a structure including a sensor for sensing, and the cover member is installed to enable the blocking of foreign matter in response to the sensing space of the housing.

That is, the sensor assembly detects this by the mutual sensing action of the light emitting and light receiving sensors when an external smoke particle flows into the sensing space side of the housing during a fire so as to quickly notify the occurrence of a fire through the alarm unit. It is.

However, in the conventional photoelectric fire detector, since the sensor assembly, that is, the shielding member is installed in a position surrounding only the inner region of the sensors, that is, the sensing space, in the housing, the sensing section of the sensors, the light emitting unit, the light receiving unit, etc. are external. There is a structural problem that is easily obscured or contaminated by foreign substances, causing frequent malfunctions.

In addition, if the cover member is installed into the sensors in the housing as described above, it is difficult to secure a space for assembling in structure, and thus satisfactory assembly cannot be expected.

In addition, the sensors are exposed to electromagnetic waves generated by various electric appliances in the room as well as external foreign matters such as dust or insects on the housing side, and the wavelengths of the electromagnetic waves are mutually sensed by the sensors. Since it is known to cause a malfunction, there is a structural limit to obtaining satisfactory sensing accuracy and operational stability.

The present invention is devised to solve the conventional problems as described above, the purpose of the present invention is easy to assemble, as well as various foreign matters such as dust and insects, as well as the sensing efficiency and operational stability by indoor electromagnetic waves, etc. It is to provide a photoelectric fire detector that can prevent the degradation.

In order to realize the object of the present invention as described above, there is provided a case having a space that is formed to allow the inflow of external air, and installed inside the case and sensing the smoke particles in the air in a state capable of blocking external foreign matter or electromagnetic waves And a buzzer configured to be installed in the case, a buzzer configured to generate an alarm sound when smoke particles are detected by the sensor assembly, and an electricity supply unit for supplying electricity for the sensor assembly and the buzzer. ,

The sensor assembly includes a housing having a sensing space capable of circulating air in a state where light is blocked from the outside, and a sensing unit for sensing smoke particles in the air by emitting and receiving light in response to the sensing space of the housing. And a shielding port installed to block electromagnetic waves in response to the sensing unit in the housing, and a shielding member installed to block external foreign substances such as dust or insects in response to the sensing space of the housing. Provide a fire detector.

1 is an overall perspective view showing a preferred embodiment of the photoelectric fire detector according to the present invention.

FIG. 2 is a plan view illustrating the internal structure of the case of FIG. 1.

FIG. 3 is an exploded perspective view illustrating the sensor assembly structure of FIG. 1.

4 is a state diagram showing a preferred installation of the photoelectric fire detector according to the present invention.

5 is a plan view for explaining the housing structure of FIG.

6 and 7 are enlarged perspective views and exploded perspective views of main parts for explaining the shielding structure of FIG. 3.

8 is a front view for explaining the structure of the covering member of FIG.

FIG. 9 is a plan view for explaining an operation for temporary fixation of FIG. 8.

10 is a perspective view of the combination of FIG.

FIG. 11 is a partially enlarged front view for describing a structure in which a buzzer is installed in the case of FIG. 1.

12 is a rear perspective view for explaining the structure of the electrical supply of the photoelectric fire detector according to the present invention.

Hereinafter, a preferred embodiment of the present invention will be described in more detail with reference to the accompanying drawings, and in the present embodiment, a standalone sensor structure will be described as an example.

1 and 2, the photoelectric fire detector according to the present invention includes a case 2 having a space part in which external air can be introduced therein, and installed inside the case 2 and having external foreign matter or electromagnetic waves. The sensor assembly (4) is configured to sense the smoke particles in the air in the state that can be blocked, and installed inside the case (2) and when the smoke particles are detected by the sensor assembly (4) generates an alarm sound And a buzzer 6 and an electrical supply unit 8 for supplying electricity for the operation of the sensor assembly 4 and the buzzer 6.

The case 2 is composed of a base plate (C1) and the cover (C2) in a set, combined in a posture as shown in the figure is made to allow the outside air to flow through the open edge between them.

The base plate (C1) and the cover (C2) is such that the sensor assembly (4) and the buzzer (6) to be described later, and the space between the circuit boards (B) for controlling them can be secured therebetween. The fittings are fitted at corresponding regular intervals.

The case 2 is installed in the ceiling (W) or the wall of the building interior, as shown in Figure 4, at this time fixed to the ceiling (W) side, such as a fastening member such as screws or the ceiling (W) as shown in the drawing It may be detachably fixed by fitting to a separate fixing plate (P) side fixed in advance on the side.

The base plate C1 or the cover C2 of the case 2 is made of synthetic resin having excellent durability as well as durability, and the cover C2 side easily checks and identifies the sensing and alarm operation on the cover C2 side. The manual button 10 and the lamp 12 as shown in FIG. 1 are installed to enable this.

On the other hand, inside the case 2, the sensor assembly 4 for sensing the smoke particles by the scattering action of light in an atmosphere where external foreign matter or electromagnetic waves are blocked. The sensor assembly 4 includes a housing 14 having a sensing space F capable of circulating air in a state where light is blocked from the outside, and corresponding to the sensing space F of the housing 14. A sensing unit 16 for sensing smoke particles in the air by emitting and receiving light, and a shielding hole 26 installed to block external electromagnetic waves in response to the sensing unit 16 in the housing 14; And, in response to the sensing space (F) of the housing 14 includes a shielding member 18 is installed to enable the blocking of external foreign substances such as dust or insects.

The housing 14 is to provide a space for sensing the smoke particles by the sensing unit 16 to be described later, the ribs (R) are formed on the disc as shown in Figure 3 spaced apart in the circumferential direction is this rib ( The sensing spaces F as shown in the drawing are formed on the inside by R).

For example, the ribs R have a wedge shape in which two sides are connected at a predetermined angle as shown in FIG. 2 and protrude in an array as shown in the drawing so that external light flows into the sensing space F. It is made to prevent.

In addition, the ribs R are formed by the sensing unit 16 to be described later to reflect the light within the range in which the traveling wave is not directly detected by the light-receiving side. To this end, a blocking rib 20 having a shape as shown in FIG. 2 is formed in the sensing space F of the housing 14.

The housing 14 is configured such that the sensing space F formed by the ribs R is separated from the outside while being separated from the outside so that the inside thereof becomes a dark room atmosphere. To this end, a cap 22 as shown in FIG. 3 is detachably coupled to the housing 14 side, and at least two protrusions K1 and grooves K2 as shown in the drawing are formed, and the fittings thereof are coupled to each other. It may be a structure that is detachably coupled.

At this time, the protrusions K1 and the grooves K2 formed on the housing 14 and the cap 22 side may be detachable from the upper side of the housing 14 in the same direction as in FIG. 3. It is formed in a corresponding posture so that it can be detachably attached. Such a coupling structure of the housing 14 and the cap 22 can easily detach the cap 22 from the housing 14 side without using a separate tool or the like, and at least two protrusions K1. ) And the grooves K2 are fitted to each other so that satisfactory durability can be obtained after their combination.

The material of the housing 14 and the cap 22 is not only durable but also excellent in heat resistance and the like, and a synthetic resin having a color that can further improve the darkroom effect on the sensing space F side is used.

Referring to FIG. 3, wrinkles 24a and 24b are formed in the housing 14 and the cap 22 to reduce diffuse reflection of light when the sensing unit 16 emits light.

The corrugations 24a and 24b have a concentric circle shape as shown in FIG. 3, and a plurality of circles have a predetermined thickness along the circumferential direction and are formed to protrude uniformly on the opposing surface side of the housing 14 and the cap 22. Can be. This structure, for example, during the sensing action of the sensing unit 16, which will be described later, it is possible to reduce the diffuse reflection in the dark room by the convex protruding portion of the light emitting side as much as possible.

If the corrugations 24a and 24b are not formed, the traveling wave of the light emitting side is formed in the plane of the housing 14 and the cap 22 even in the state where the smoke particles are not introduced into the sensing space F. Irregularly diffused reflections by the surfaces may reduce sensing accuracy or efficiency.

The sensing unit 16 is installed in the posture as shown in FIG. 2 on a section where the ribs R are formed in the housing 14, and two optical sensors to sense smoke particles by light emission and light reception. That is, the light emitting sensor S1 and the light receiving sensor S2 are formed in one set.

Referring to FIG. 5, the setting angle A of the light emitting side sensor S1 and the light receiving side sensor S2 is in a general range, for example, about 130 ° to 140 when referred to the center of the housing 14. It is made within the range. In this case, the blocking rib 20 is formed at the position as shown in the figure so that the traveling wave of the light emitting side sensor S1 is not directly sensed by the light receiving side sensor S2.

In addition, the sensors S1 and S2 are fixed by fitting coupling between the housing 14 and the cap 22. To this end, fixing parts 28a and 28b having grooves into which the sensors S1 and S2 can be fitted, as shown in FIG. 3, are formed in the housing 14 and the cap 22, respectively. The sensors S1 and S2 may be wrapped by the governments 28a and 28b to be fixed by a simple fitting coupling.

The fixing structure of the sensors (S1, S2) as described above is installed on the housing 14 and the cap 22 side, for example, to prevent the posture or angle set by physical vibration or shock, etc. to be changed. Can be fixed in a state that can be, because it does not need to use a separate fastener can also reduce manufacturing costs.

As described above, the sensing unit 16 installed on the housing 14 side has a sensing space of the housing 14 within a range in which the traveling wave of the light emitting side sensor S1 is not directly sensed by the light receiving side sensor S2. In (F), the smoke particles are sensed in such a state while continuously reflecting through each side of the ribs (R).

That is, when the smoke particles in the indoor air flow into the sensing space F of the atmosphere as described above, the traveling wave moving along only a predetermined section comes into contact with the smoke particles, causing the phenomenon that the traveling direction is refracted by the particles. As the traveling wave is detected by the light-receiving-side sensor S2 due to the refraction phenomenon, the soft particles are sensed. The sensing signal of the light-receiving-side sensor S2 is applied to the circuit board B side to generate an alarm sound while the buzzer 6 described later is operated in a well-known method through the board B. .

6 and 7, a shield 26 is installed in the light-receiving side sensor S2 installed at the housing 14 side.

The shield 26 is made of a metal or synthetic resin capable of blocking electromagnetic waves, and is formed in the shape as shown in FIG. 7 so as to physically block the light receiving side sensor S2 from external electromagnetic waves. It is installed in a posture surrounding the sensor (S2) as shown in the inside of the fixing portion (28a, 28b) corresponding to the.

As described above, when the light-receiving side sensor S2 is installed in the housing 14 in a state surrounded by the shielding opening 26, external electromagnetic waves generated from various electrical devices or devices after being installed on the ceiling or the wall of the room. Since it is essentially blocked from interference such as, it is possible to prevent the electrical malfunction caused by the interference phenomenon of the electromagnetic wave in advance.

In the above description, the shielding holes 26 are provided only in the light-receiving side sensor S2, but they are not limited thereto. For example, although not shown in the drawings, the light emitting side sensor S1 may be installed as described above.

The shielding member 18 is installed to block external foreign substances such as dust or insects in response to the sensing space F side of the housing 14, and between the housing 14 and the cap 22. Of course, the ribs R are formed in a band shape having a shielding surface 30 having a shape as shown in FIG. 8 so as to cover the sensors S1 and S2 from the outside.

The material of the shielding member 18 is not only heat-resistant but also when a physical external force is applied to the surface side of the shielding surface 30, a metal sheet which is easy to generate elastic resilience to return to its original shape may be used. The shielding surface 30 is formed by forming a plurality of through holes 32 as shown in FIG. 8.

The through holes 32 formed on the shielding surface 30 side may be formed by, for example, a corrosion process such as photoetching, or may be formed by a punching process using a punch.

The through holes 32 may be well-known honeycomb shapes as shown in FIG. 8 or may be formed in a circular or polygonal shape although not shown in the drawings.

The cover member 18 is temporarily fixed in the shape as shown in FIG. 3 by a locking action when the coupling member is installed between the housing 14 and the cap 22 in a state capable of blocking external foreign matters. It is made to be installed on the housing 14 side in a fixed state together. To this end, the fitting projection 34 and the fitting groove 36 as shown in Figure 8 may be formed on both side ends of the blocking member 18.

That is, both ends of the shielding member 18 are easily fixed by being connected by the fitting coupling of the fitting protrusion 34 and the fitting groove 36. At this time, the fitting protrusion 34 is fitted to the fitting groove 36 side as shown in FIG. 9 in a posture facing inward from the outer circumferential direction.

Since the fitting structure as described above, the locking member 18 is temporarily fixed, so that when the self-elastic repulsive force acts uniformly in the circumferential direction, a locking action is caused at the fitting protrusion 34 and the fitting groove 36. The shielding member 18 can be easily fixed in the shape as shown in FIG.

In addition, the cover member 18 temporarily fixed as described above is fitted to the upper and lower sides by fixing grooves 38a and 38b formed at the housing 14 and the cap 22, as shown in FIG. 3. It can be easily installed as shown in Figure 10 so that the sensing space (F) inside the housing 14 can be blocked to the foreign matter.

In particular, the structure in which the cover member 18 is installed in a temporarily fixed state as described above may provide an improved assembly property when the housing 14 and the cap 22 are set between them.

The buzzer 6 is to generate an alarm sound in association with the operation of the sensing unit 16 in the case 2, and is spaced apart from the sensor assembly 4 in the case 2. Can be installed as in

The buzzer 6 has a well-known structure capable of generating an alarm sound, and when the smoke particles are sensed by the sensors S1 and S2 inside the case 2, the buzzer 6 is formed by the circuit board B. It is set to enable the generation of its own alarm sound while being controlled.

When the buzzer 6 is installed inside the case 2, the buzzer 6 is installed so as not to reduce the flow of air introduced from the outside through the edge side of the case 2. To this end, the case 2, that is, the base plate (C) side may be a structure that is spaced at regular intervals from the bottom side while being supported by at least two or more support 40 as shown in FIG.

The setting structure as described above prevents the flow of external air by the space occupied by the buzzer 6 in the case 2 to uniformly inflow of air through the entire edge of the case 2. In this state, it is possible to further improve the sensing efficiency of the smoke particles during a fire.

The electricity supply unit 8 is for supplying electricity for the operation of the sensing unit 16 and the buzzer 6. Referring to FIG. 12, a battery 42 is used as an electricity supply source, and the battery 42 ) Is detachably accommodated by the housing groove 44 and the door 46 provided on the back side of the case 2, that is, the base plate (C1).

The battery 42 is wired in a well-known method by using an electric wire or the like to enable electricity supply for sensing and alarm operation of the sensing unit 16 and the buzzer 6.

When the battery 42 is used as the electricity source as described above, the installation of the detector is easy and the electricity can be supplied with a simple structure. Since no additional electrical wiring is required for supply, general users can easily perform compatibility and maintenance.

In the above embodiment, the present invention is shown in the description and drawings as an example that is made of a stand-alone detector structure as shown in Figure 1, but is not limited thereto. For example, although not shown in the drawings, it may be composed of an interlocked detector that operates in conjunction with a disaster prevention system in a large-scale building. Of course, at this time, in addition to the above-described structure, it is wired by a well-known method so that the operation and control in conjunction with the disaster prevention system is possible.

In the above, a preferred embodiment of the photoelectric fire detector according to the present invention has been described, but the present invention is not limited thereto, and various modifications can be made within the scope of the utility model registration claims, the detailed description of the design, and the accompanying drawings. It is possible and this also belongs to the scope of the present invention.

As described above, the present invention is easy to assemble the sensor assembly because the sensor assembly, that is, the shielding member is temporarily fixed by a simple fitting combination, can be easily set in a posture surrounding the sensing unit as well as a space for sensing the smoke particles. In addition, in particular, the sensing unit consisting of the sensing space and the sensor to prevent the malfunction due to foreign matters by performing a sensing action in an atmosphere in which external foreign matters are blocked by the screening member, thereby improving the sensing accuracy And efficiency can be obtained.

In addition, the sensing unit is provided with a shield to block various kinds of electromagnetic waves present in the room, thereby preventing malfunction due to interference of electromagnetic waves when sensing smoke particles by emitting and receiving light. And sensing reliability.

Claims (7)

A case having a space portion formed to allow the inflow of outside air, a sensor assembly installed inside the case so as to sense smoke particles in the air in a state capable of blocking external foreign substances or electromagnetic waves, and installed inside the case And a buzzer for generating an alarm sound when the smoke particles are detected by the sensor assembly, and an electricity supply unit for supplying electricity for the sensor assembly and the operation of the buzzer. The sensor assembly may include a housing having a sensing space capable of circulating air in a state where light is blocked from the outside, and a sensing unit for sensing smoke particles in the air by emitting and receiving light in response to the sensing space of the housing. And a shielding port installed to block electromagnetic waves in response to the sensing unit in the housing, and a shielding member installed to block external foreign substances such as dust or insects in response to the sensing space of the housing. Type fire detector. The photoelectric fire of claim 1, wherein a cap is installed in the housing, and the cap is detachably fixed by fitting at least two protrusions and grooves to form an open dark room atmosphere corresponding to the sensing space. sensor. The photoelectric fire detector of claim 1, wherein the sensing unit comprises two optical sensors capable of emitting and receiving light, and the sensors are fixedly installed in a state of being wrapped in at least two layers on the housing side. The photoelectric fire detector of claim 1, wherein the shield has at least one or more shielding films for blocking electromagnetic waves, and the shield is installed so that all or a portion of the shielding is wrapped in correspondence to the sensing unit at the housing side. The photoelectric fire detector of claim 1, wherein the shielding member is formed in a band shape having a shielding surface formed of circular or polygonal through-holes capable of blocking external foreign substances such as dust or insects while allowing air to circulate. . The method of claim 1, wherein the shielding member is formed on both sides of the longitudinal direction projections and grooves that can be fitted to each other is formed, the fitting combination is going to be not only the sensing space but also the posture that can wrap the entire sensing unit Photoelectric fire detector, characterized in that installed on the housing side in such a temporarily fixed state after being fixed. The photoelectric fire detector according to claim 1, wherein the buzzer is spaced apart at regular intervals from the bottom surface to allow inflow and circulation of outside air in the case.