WO2015114183A1

WO2015114183A1 - Emergency light for tunnel

Info

Publication number: WO2015114183A1
Application number: PCT/ES2015/070007
Authority: WO
Inventors: Miguel Ángel BARRENA MARTINEZ
Original assignee: Barrena Martinez Miguel Ángel
Priority date: 2014-01-31
Filing date: 2015-01-12
Publication date: 2015-08-06
Also published as: EP3106741A1; ES2507440A1; ES2507440B1

Abstract

The invention relates to an emergency light for tunnels, comprising: an open casing (1); attachments for attaching the casing (1) to a tunnel; an LED body inside the casing, which can be connected to the electrical grid; an LED control plate; a cover (10) for covering the LED body and closing the casing (1); and a standalone power supply device for use in the event an electrical grid supply failure, comprising a lithium-phosphate-iron 3 A.h DC battery, a charger for charging the battery from the electrical grid, a charger control plate, and a battery control plate, including monitoring means and a time meter for monitoring the voltage and current of the battery, in order to protect the battery against overcharges, overdischarges and short circuits. The invention provides extended battery life and improves the operating versatility of the light.

Description

EMERGENCY LIGHTING FOR TUNNELS

D E S C R I P C I O N OBJECT OF THE INVENTION

The present invention can be included in the technical field of lighting devices. Specifically, the invention aims at an emergency luminaire for tunnels, particularly for railway tunnels.

BACKGROUND OF THE INVENTION

In the tunnels of some communication routes, such as roads and railways, evacuation galleries are defined for security reasons to evacuate people from the tunnel in case of emergency, caused for example by accident, catastrophe or fault.

These evacuation galleries are equipped with lighting means of very varied types, depending on the needs, which usually include luminaires connected to the mains. To avoid disabling the lighting means in the event of a mains connection failure, the lighting means incorporate batteries intended to power the luminaires, where the batteries are charged from the mains during the periods of operation in which the luminaires they are powered by a mains, while, in the event of a mains connection failure, the batteries automatically start and power the luminaires for a while.

DESCRIPTION OF THE INVENTION The present invention describes an emergency luminaire for tunnels, in particular, but not exclusively, for rail tunnels.

The luminaire incorporates an open housing, elongated in the longitudinal direction, and provided with two ends according to the longitudinal direction, where the housing also incorporates fasteners to fix the housing to a gable or to the roof of a tunnel. Inside the housing is a body of LEDs that can be connected to the mains and additionally an LED control board to control the power and operation of the LED body, as well as a cover is mounted on the housing, to cover the body of LEDs and close the housing.

The luminaire further comprises an autonomous power device intended to power the body of LEDs in the event of a power failure in the mains, where the power device comprises:

- a lithium phosphate-iron DC battery;

- a battery control board,

- a charger to charge the battery from the network, and

- a general control board, to activate a switching between LED power supply by network and battery power supply.

The battery comprises at least one cell, preferably a plurality of cells, so that the battery contains a sufficient charge for the desired purposes, for example, of 3 A.h. The battery control board incorporates monitoring means and a time meter, to monitor the voltage and current intensity of each of the cells, to avoid overloads, overloads and short circuits.

The luminaire described has a range of operation substantially greater than that of the luminaires known in the state of the art, as well as, thanks to the LED, battery and charger control boards, superior performance with respect to: reliability, and versatility in terms of operating conditions, since they substantially extend the life of the battery, as well as allow the luminaire to operate in accordance with a high range of voltages, intensities and frequencies, which allows the luminaire to easily adapt to the conditions required in many countries.

DESCRIPTION OF THE DRAWINGS To complement the description that is being made and in order to help a A better understanding of the characteristics of the invention, in accordance with a preferred example of practical implementation thereof, is accompanied as an integral part of said description, a set of drawings in which, with an illustrative and non-limiting nature, the following has been represented:

Figure 1.- Shows a perspective view of a luminaire according to the invention, where the cover has not been shown.

Figure 2a.- It shows an enlarged view of the back of the housing, where there are grooves to fix the housing to a tunnel.

Figure 2b.- Shows a side view of the housing connected to a metal support using the slots of Figure 2a.

Figures 3a, 3b and 3c- Show, in three different positions, the fixing of the housing to a tunnel using rotating fasteners.

Figure 4.- Shows a detail of a side cover intended to cover the ends of the housing, and which is provided with a silicone O-ring gasket.

Figure 5.- Shows a lateral perspective in detail of the luminaire.

Figure 6.- Shows a detail of figure 5 where the relative arrangement between the housing and the cover is illustrated.

PREFERRED EMBODIMENT OF THE INVENTION

Next, a detailed description of a preferred embodiment of the invention is described with the aid of Figures 1 to 6 above.

As can be seen in Figure 1, the emergency luminaire for tunnels object of the present invention comprises an open housing (1) elongated in the longitudinal direction, preferably made of extruded aluminum and provided with two ends according to a longitudinal direction. The housing comprises connections (preferably two connections) to be fixed, both horizontally and vertically, as desired, to a gable or on the roof of a tunnel. In particular, it is envisioned that the housing is fixed to the gable or to the tunnel ceiling through a metal support (2) previously arranged in the tunnel (see figure 2b). According to a first option, as shown in Figure 2a, each connection incorporates two slots (3) defining a cross, located on the rear face of the housing (1), preferably in the vicinity of the ends. According to a second alternative option, shown in Figures 3a to 3c, the connections comprise a fastener (4) rotatably linked to the housing (1), preferably linked to the ends. Figures 3a to 3c show three positions with different orientations of the housing (1) with respect to the fixing (4).

Returning again to figure 1, inside the housing (1) there is a body of LEDs that supports a plurality of LEDs (5) to illuminate the tunnel. The luminaire is provided with the corresponding electrical connections, such as a power hose (not shown), located at a first end of the housing (1), to connect the luminaire to the network and provide power to the LEDs (5). According to a preferred embodiment, the LED body incorporates 240 LEDs (5) SMD5050 white light, 32 W power, with color temperature 6000 K, capable of providing a luminous flux of 2,700 lumens and equipped with an angle of opening greater than 120 °. Preferably, as shown in Figure 1, there is a male quick plug (19), connected at the first end of the housing (1), just as the hose is equipped with the corresponding female quick plug (not shown) ), to connect to the luminaire. The LED body comprises a central section (8), preferably flat, provided with two ends, as well as two lateral sections (9), also flat, located at the ends of the central section (8), and which are inclined with respect to the section central (8), to allow a more uniform distribution of light. The luminaire additionally incorporates an LED control board (not shown) to control the power and operation of the LEDs (5). The LED control board is configured to be able to withstand different values of alternating current input voltage, for example, 1 15, 127, 220, 230 and 240 V, at an input frequency of 50-60 Hz., And a input current of up to 1A, as well as to provide a direct current output voltage of 30 V and a power of 35 W output at maximum intensity. The incorporation of an LED control board with the indicated characteristics allows the luminaire to be able to operate, without the need to make modifications, in a way adapted to the conditions of voltage, intensity, luminosity, frequency, etc. which are stipulated in different countries, which gives the luminaire an unusual versatility. For safety, the battery input comprises a 1 A and 250 V fuse.

A cover (10), see figures 3a to 3c, preferably made of halogen-free and self-extinguishing polycarbonate, is mounted on the housing (1), to cover the LED body and close the housing (1). The cover (10) and, where appropriate, covers (1 1, 21), see figure 1, have closures with the housing (1) that provide a level of sealing IP65 or higher. To achieve the indicated tightness, the closures comprise, cover closures (see figure 4) and cover closures (see figures 5 and 6). The cover closures incorporate, as an example, as shown in Figure 4, gaskets (18) made of 1.5 mm diameter silicone O-ring.

The cover closures incorporate, as shown in Figures 5 and 6:

- straight tabs (22) located longitudinally along the inside of the housing (1), oriented obliquely inwards;

- curved tabs (23) located longitudinally along the side edges of the cover (10), to embrace straight tabs (22);

- sealing gaskets (not shown), made of spongy material. According to a preferred embodiment, the luminaire is configured to be supplied with alternating current of between 100-230 V at frequencies of 50-60 Hz, presenting a power factor (eos phi) equal to or greater than 0.95.

Likewise, the constructional characteristics of the luminaire allow proper operation within a temperature range of -30 ° C / + 50 ° C, as well as in conditions of relative humidity above 95%.

Additionally, the luminaire object of the present invention incorporates an autonomous power device intended to power the LEDs (5) in the event of a mains supply failure. The feeding device comprises a battery (not shown) and a charger (not shown) to charge the battery, as well as additionally incorporating respective battery control board (not shown) and general control board (not shown). The general control board is responsible for receiving electric current from the battery and feeding the LEDs, to switch, in less than 1 second, the power supply of the LEDs between power from the network and power from the battery, when the power from the network is accidentally interrupted . The battery is a 24V DC current lithium phosphate-iron LiFeP0 ₄ battery and is preferably composed of eight cells, to provide a charge of 3 Ah. It requires a charging time of approximately 2 hours and has a no lower autonomy. 90 minutes The battery control board incorporates monitoring means and a time meter, to monitor the voltage and current intensity of each of the cells, to avoid overloads, overloads and short circuits. In particular, the monitoring means monitor each of the cells to verify that the voltage is within established ranges, thus avoiding battery overloads and overloads, as well as the monitoring means and the time meter monitor each cell to verify that the current intensity of the battery does not exceed a preset limit for a predetermined time. As an example, it is verified that the voltage does not exceed 3.85 ± 0.025 V to protect against overloads and that it is not below 2.30 ± 0.080 V, as well as that the intensity does not exceed 40 A for a time greater than 1 1 ms, which would be indicative of a short circuit. By using a battery control board configured as indicated above, the battery can be provided with a life exceeding 1000 cycles. Additionally, the robust battery configuration allows working temperatures between -30 and +50 ° C.

According to a preferred example, the charger is configured to receive alternating current of 50-60 Hz. With an input voltage of 1 10-277 V and an input current of up to 0.2 A, as well as means for providing a voltage. Output in direct current of 30 V and a maximum output current of 2 A. The battery is charged from the network using the charger, and has a range of operation exceeding 90 minutes. The battery is configured to go into operation in a time not exceeding 1 second since a lack of mains supply is detected. Preferably, the housing (1) comprises two removable side covers (1 1, 21), as indicated above, which are preferably made of polycarbonate, and located both at the first end of the housing (1) and in a second end of the housing (1) opposite the first end. Likewise, preferably, the battery can be housed inside the housing, in an area close to the second end, so that it can be easily removed in case of breakdown, after removing the corresponding cover (1 1). A first cover (1 1) of the covers (1 1, 21) is located at the first end of the housing (1), while a second cover (21) is located at the second end of the housing (1).

The luminaire comprises a manual switch (not shown) that allows to selectively connect and disconnect the power supply of the LEDs (5) when the luminaire is connected to the network. When the luminaire is not connected to the network, but to the battery, the manual switch is not operational and the LEDs shine at a lower intensity, for example, causing a power consumption of about 20 W, according to a luminous flux of 1350 lumens, less than 2700 lumens in the case of connection to the mains, to extend the battery life.

The battery has a consumption of 62 W in state of charge, 48 W in state of service mentioned above, and 10 W in state of charged battery and LEDs off.

Also, the luminaire incorporates a pair of indicators (not shown), for example, in red and green colors, to indicate the state of charge and the operating status of the battery. For example, when the luminaire is connected to the network, if the red indicator is on and the green indicator is off, the battery is charging from the network, as well as if the red indicator is off and the green indicator is on, the battery It is fully charged.

Preferably, the LED control board and the charger control board are integrated into a single LED board and joint charger. In this way, the electrical connections between different components of the luminaire are simplified, with the consequent reduction of wiring and space saving, inside the housing (1). It is not necessary (or recommended) to disassemble the luminaire to proceed with its connection. The luminaire incorporates, at the first end, as indicated above, a hose (not shown) approximately one meter long and 4 ^* 1.5 mm ² in section, connected internally and protruding from the first cover (1 1 ). Simply remove (unscrew) the second cover (21) from the second end; connect the battery properly to a connector (not shown) installed inside the housing (1); place the second cover (21); and connect the hose to the mains. The described configuration is adapted to varied national and international regulations, which allows the luminaire of the invention to be used in various countries. For example, the luminaire described is in compliance with the UNE EN 55015, EN 50308, EN 60598-1, EN 60598-2-1, EN 61000-3-2, EN 61547, EN 6100-4-2, and EN 1837 standards ; as well as with the EC community certification requirements referred to in directive 2004/108 / EC.

Claims

1. - Emergency luminaire for tunnels, comprising:

- an open housing (1), elongated in the longitudinal direction, and provided with two ends in the longitudinal direction;

- a body of LEDs, comprising a plurality of LEDs (5) and which is housed inside the housing (1), and which is connectable to the power grid;

- a cover (10), mounted on the housing (1), to cover the LED body and close the housing (1); Y

- an autonomous power supply device intended to power the LED body in the event of a power failure in the power grid, where the power supply device comprises:

- a lithium phosphate-iron DC battery, and

- a charger to charge the battery from the network;

characterized in that it additionally comprises:

- an LED control board to control the power and operation of the LED body;

- a battery control board, and

- a general control board, to activate a switching between LED power supply by network and battery

where the battery control board comprises:

- monitoring means, to verify that the battery voltage and current values are within predetermined ranges; Y

- a time meter to verify that the battery current intensity does not exceed a certain value for a time longer than a preset time.

2. - Emergency luminaire for tunnels, according to claim 1, characterized in that the LED body comprises:

- a central section (8) provided with two ends, and

- two lateral sections (9), located at the ends of the central section (8), and which are inclined with respect to the central section (9).

3. - Emergency luminaire for tunnels, according to claim 1, characterized in that the LED control board and charger control board They are integrated into the same LED control board and joint charger.

4. - Emergency luminaire for tunnels, according to claim 1, characterized in that it additionally incorporates a supply hose located at a first end of the housing (1), to connect the luminaire with the mains.

5. - Emergency tunnel luminaire according to claim 4, characterized in that it additionally incorporates a quick plug (19) located at the first end of the housing (1) to connect the supply hose to the luminaire.

6. - Emergency luminaire for tunnels, according to claim 4, characterized in that it additionally incorporates a first side cover (1 1) to cover the first end of the housing (1).

7. - Emergency luminaire for tunnels, according to claim 1, characterized in that it additionally comprises a second removable side cover (21), to cover a second end of the housing (1), as well as the battery is housed in the housing (1) in an area near the second end and accessible from the second cover (21).

8. - Emergency luminaire for tunnels, according to any one of claims 6 and 7, characterized in that the cover (1 1) and / or the cover (10) are made of halogen-free self-extinguishing polycarbonate, as well as the covers (1 1, 21) and cover (10) have closures with the housing (1) provided with a sealing level of not less than IP65.

9. - Emergency luminaire for tunnels, according to claim 8, characterized in that the closures comprise:

- cover closures, which incorporate:

- curved eyelashes (23) located longitudinally along the side edges of the cover (10), to embrace straight eyelashes (22); Y

- sealing gaskets, made of spongy material, and

- cover closures, which incorporate silicone o-rings (18).

10. Emergency luminaire for tunnels, according to claim 1, characterized in that it additionally incorporates connections to fix the housing (1) to a gable or to the roof of a tunnel.

eleven . - Emergency tunnel luminaire according to claim 10, characterized in that the connections comprise cross-shaped slots (3) located on a rear face of the housing (1), to fix the luminaire horizontally or vertically.

12. - Emergency luminaire for tunnels, according to claim 10, characterized in that the connections comprise a fixing (4) rotatably linked to the housing (1), to allow a rotation of the housing (1) with respect to the fixing (4) around a longitudinal axis of the housing (1).

13. - Emergency luminaire for tunnels, according to claim 1, characterized in that it additionally comprises a manual switch that is operable to selectively allow and prevent the feeding of the LEDs (5) when the luminaire is connected to the mains, as well as the switch is configured to be locked in position to allow the power supply of the LEDs (5) in case of connection failure with the mains.

14. - Emergency luminaire for tunnels, according to claim 1, characterized in that it additionally incorporates at least one indicator to indicate the state of charge and the operating status of the battery.