RU100303U1 - ENERGY SAVING LED RADIATOR FOR CIRCLE SIGNAL LIGHTS - Google Patents

Abstract

 An energy-saving LED emitter for circular signal lights, which does not require installation in a cylindrical Fresnel lens and the use of a gimbal, containing a crystal, a polymer case and a radiator, characterized in that the polymer case contains a lower part in the form of a surface from the circular rotation of the ellipse around the center of the case, the major axis of the ellipse is located in the horizontal plane of the emitter passing through the crystal, the eccentricity of the ellipse is 0.5-0.55, and the center of the ellipse is offset from the center of the radiator 0.35-0.4 of the size of the semi-major axis of the ellipse, and a central cylindrical cut with a spherical bottom convex towards the crystal, and also the upper part in the form of a cylinder with a built-in conical reflector, with a diameter equal to 0.44-0.48 from the diameter of the lower part of the housing, and the diameter of the cylindrical cutout is 0.8-0.9 of the diameter of the upper cylindrical part of the housing.

Description

Technical field

The proposed utility model relates to signaling devices for navigation equipment of waterways, namely, LED energy-saving emitters for signal lights of floating and coastal navigation signs.

State of the art

Known light sources for navigation lights are signal lamps of the SGV type at a voltage of 2.5 V, used in typical light-signal devices of circular action with a gimbal ESPK-75M. (Shmerling I.E. “Navigation equipment of inland waterways”. M., Transport, 1988, 224 pp.).

A significant drawback of these lamps is that to create colored signal lights, it is necessary to use a Fresnel lens and install color filters, leading to significant light losses and increased energy consumption from autonomous power sources. Another disadvantage of the lamps is their low reliability and short service life (no more than 1000 hours).

The closest analogue in technical essence and the achieved effect to the proposed device and adopted as a prototype is an LED emitter containing an emitting crystal, a polymer transparent housing for radiation, and external leads used in standard ESPK-75D light-signal devices (Certificate of Utility Model No. 22653 “ Semiconductor emitter for circular navigation lights ”with a priority of 10/05/2001).

It is made of an LED containing a radiating crystal and a transparent polymer cylindrical body with a built-in conical reflector. The LED is placed in the focus of the cylindrical Fresnel lens, due to which the light flux of the LED unfolds in the horizon plane.

The disadvantage of the described device is the difficulties associated with the need to combine two optical elements: LED and Fresnel lens. In addition, the useful light intensity at the output of the light-signal installation is distributed in a small (3-4 °) vertical angle, and therefore, to ensure the visibility of the sign during the roll and roll of the floating sign, it is necessary to mount a radiator with a Fresnel lens in a gimbal.

Disclosure of a utility model.

The essence of the Technical solution of the utility model is as follows:

- the lower part of the transparent polymer case (refractive index n = 1.5-1.6) is made in the form of a surface from the circular rotation of the ellipse around the center of the case; the major axis of the ellipse is located in the horizontal plane of the emitter passing through the crystal, the eccentricity of the ellipse is 0.5-0.55, and the center of the ellipse is offset from the center of the emitter by 0.35-0.4 of the size of the semimajor axis of the ellipse; this part of the body has a central cylindrical cut, ending with a spherical surface convex towards the crystal;

- the upper part of the polymer body is made in the form of a cylinder with an integrated conical reflector, the cylinder diameter is 0.44-0.48 of the diameter of the lower part of the body, the diameter of the cylindrical cutout in the lower part of the body is 0.8-0.9 of the diameter of the upper cylindrical part corps.

The device of the polymer case is shown in drawing 1.

As can be seen from Fig. 1, the emitting crystal is located in the center of the lower plane of the body. The luminous flux of the crystal is refracted by the cylindrical surface of the cutout of the housing and the convex elliptical surface of the housing and is removed from the housing in a horizontal plane.

Part of the luminous flux is refracted by the spherical surface of the cutout of the housing and the conical reflector of the cylindrical part of the housing and is removed from the housing in a horizontal plane.

A slight difference in the diameters of the cylindrical cut-out and the cylinder of the upper part of the housing makes it possible to effectively use almost all the radiation of the crystal to ensure maximum light intensity in the horizontal plane.

The required radiation angle in the vertical plane (2θ _0.5 = 10-25 degrees) is provided as follows:

- when creating emitters with a white or green glow, in which a radiating crystal and a phosphor are used, the radiation angle is 15–25 degrees. provided by increasing the luminous area due to the phosphor;

- when creating emitters with red or yellow glow, the necessary radiation angle (2θ _0.5 = 10-25 degrees) is ensured due to the larger crystal size (about 1 × 1 mm) and the combination of two light fluxes from the elliptical and cylindrical parts of the body.

A typical radiation pattern is shown in Fig. 2. As you can see, the radiation is deployed in the horizontal plane (radiation angle of 360 degrees) with a typical radiation angle in the vertical plane of 2θ _0.5 = 20 degrees.

Thus, the crystal radiation is used very efficiently, which allows to obtain high values of luminous intensity - 10-20 cd and the estimated range of visibility - 4-5 km.

The presented radiator is mounted on a heat sink and is protected by a transparent protective cap (Fig. 3).

The proposed emitter does not require its installation in a cylindrical Fresnel lens and the use of a gimbal, which greatly simplifies the design and cost of the device.

The technical implementation of the solutions of the energy-saving LED emitter for circular signal lights is based on well-known basic technical and technological processes that are currently well developed and widely used. The proposal meets the criterion of "Industrial Applicability".

A brief description of the drawings.

This proposal is illustrated by drawings 1-3.

To hell. 1. schematically shows a longitudinal section of a polymer housing with a crystal LED.

To hell. 2. The radiation pattern of the LED emitter is shown.

To hell. 3. schematically shows a General view of an energy-saving LED emitter for circular signal lights.

Implementation of a utility model.

The proposed emitter (Fig. 1 and 3) contains:

- emitting crystal 1, located in the center of the lower plane of the lens;

- a polymer case 2, the lower part of which is made in the form of a surface from the circular rotation of the ellipse 3 around the center of the case, having a central cylindrical cutout with a convex spherical surface, and the upper part is made in the form of a cylinder 4 with an integrated conical reflector 5;

- radiator 6 for cooling the emitter;

- electrical leads 7. with a current limiting resistor located inside the radiator;

- transparent protective cap 8 to protect the emitter from external influences.

The operation of the LED emitter is as follows. The direct current from the power source via flexible leads 7 enters through the current-limiting resistor to the crystal of LED 1. The crystal emits a luminous flux of a given color of luminescence, which is refracted by the surfaces of the polymer casing 2 and turns around in the horizontal plane.

The proposed energy-saving radiator for circular signal lights provides the following performance characteristics:

Operating current - 200 ... 300 mA;

Operating voltage - 2.5 ... 4.0 V;

Power consumption - 0.75 ... 1.2 W;

Light colors: red, yellow, green and white;

Luminous intensity - 10 ... 20 cd at a current of 300 mA ;;

The radiation angle in the horizontal plane is 360 degrees, in the vertical plane. - 10-25 degrees;

Estimated range of visibility of lights - 4 ... 5 km;

The color temperature of the white light is in the range of 4500-6000 K (natural white light).

Thus, the necessary light parameters were obtained without the use of a cylindrical Fresnel lens and gimbal.

Claims (1)

An energy-saving LED emitter for circular signal lights, not requiring its installation in a cylindrical Fresnel lens and the use of a gimbal, containing a crystal, a polymer case and a radiator, characterized in that the polymer case contains a lower part in the form of a surface from the circular rotation of the ellipse around the center of the case, the major axis of the ellipse is located in the horizontal plane of the emitter passing through the crystal, the eccentricity of the ellipse is 0.5-0.55, and the center of the ellipse is offset from the center of the radiator 0.35-0.4 of the size of the semi-major axis of the ellipse, and a central cylindrical cut with a spherical bottom convex towards the crystal, and also the upper part in the form of a cylinder with a built-in conical reflector, with a diameter equal to 0.44-0.48 from the diameter of the lower part of the housing, and the diameter of the cylindrical cutout is 0.8-0.9 of the diameter of the upper cylindrical part of the housing.