RU115442U1 - LED MIRROR LIGHT - Google Patents

Abstract

LED mirror lamp, characterized in that the luminaire design uses three main elements, interconnected without air spaces: a mirror, which is both a heat sink and a reflector, an LED, copper plates, which are both conductors and radiators.

Description

The utility model is a special layout technology for a frameless lamp using powerful LEDs as a light source. The technology can be used in the manufacture of compact, inexpensive and effective luminaires for lighting residential and public buildings, open areas, as well as in lighting systems of mobile systems.

In fact, all LED lamps of the traditional layout (Figure 1) include a printed circuit board on which semiconductor light sources and auxiliary electronic components are soldered by surface mounting. The solder board is installed in a housing with a diffuser and a radiator to remove heat from the LEDs. A similar arrangement is inherent in luminaires with incandescent or fluorescent lamps, but it is unacceptable for LED lamps, since in traditional light sources, the increased temperature inside the lamp is beneficial or, at least, does not negatively affect the luminosity of the light source, then, in the case of using LEDs , the increased temperature inside the lamp directly and negatively affects the performance of the light source - the LED. Another disadvantage of such luminaires is their low efficiency due to light losses in the diffusers and in the housing itself. All these shortcomings reduce the efficiency of the lighting system, reduce its resource and increase its cost.

An analogue of the claimed utility model is a technical solution of the same purpose - an LED lamp (RU 98532 U1 IPC F21S 13/00 (2006.01)) containing a housing made of heat-conducting material, covered by a panel of translucent material, in which a printed circuit board with LEDs and a control unit are installed wherein the inner surface of the housing base, on which the printed circuit board with the LEDs is located, is made convex in shape, the outer surface of the housing is finned, characterized in that the LEDs are integrated in th least two branches of series-connected LEDs, distributed on the inner surface of the base body in a staggered manner.

The closest analogue of the claimed utility model is a technical solution of the same purpose - an LED lamp (RU No. 101528 U1 MPK F21S 13/00 (2006.01)), designed according to the housing layout with an internal air space, containing a base of heat-conducting material, a translucent protective panel located at a certain distance from each other, and the power source, while on the inner surface of the base there is a printed circuit board with LEDs evenly distributed on it.

Figure 1 - Design diagram of the housing LED lamp.

Figure 2 - Design diagram of a single-sided flat LED mirror lamp.

Figure 3 - Design diagram of a double-sided flat LED mirror lamp.

Figure 4 - Design diagram of a multilateral surround LED mirror lamp.

Figure 5 - Photo of the current LED mirror lamp.

The structural parts of the housing LED lamp (Figure 1): diffuser 1; Pavilion 2; PCB mount 3; foil textolite (printed circuit board) 4; heat sink fins 5; LED 6; soldering 7.

The propagation of the light flux (shown by arrows) in the housing lamp occurs as follows: the light from the LED 6 propagates through the inside of the airspace and is reflected from all its internal surfaces. Part of it through the diffuser 1 goes outside - this part is useful - it makes up about 70% of the amount of light that the LED emitted. Irrevocable light losses are caused by both the absorption of light by the internal surfaces of the housing 2, the circuit board 4, the diffuser body 1 itself, and the reflection of light at the boundaries of the air-diffuser and diffuser-air junctions inside the lamp housing.

The heat flow in the housing lamp from the LED 6 through soldering 7 passes to the circuit board 4 and from it through the housing 2 and cooling fins 5 is transferred to the surrounding atmosphere. However, a hot atmosphere is created in the case itself, since the air mass is poor heat conductor, and cramped conditions do not allow natural convection to quickly transfer heat from the circuit board and LED to the case walls and the diffuser. Housings of luminaires are made of metals to increase the heat transfer to the surrounding atmosphere, and the diffuser itself, which makes up almost half of the inner surface of the luminaire, is most often made of organic transparent or matte plastics having poor thermal conductivity. Fans are used for better cooling, but they consume energy, create noise and dust the internal parts of the lamp, which also degrades its light characteristics.

A common drawback of the body-mounted luminaires is the large loss of light (up to 30%), due to the many internal surfaces that absorb light and reflects it inside the luminaire and the insufficient heat removal from the LED chip due to the presence of an air cavity inside the luminaire.

This utility model is based on the task of creating a luminaire design that, while minimizing the number of component parts, would provide a maximum luminous flux close to the values of the LEDs themselves and efficient heat removal from the LED to ensure favorable temperature conditions for its operation in order to maintain long-term performance.

The problem is solved in that they are excluded: a printed circuit board, a diffuser and a housing, that is, internal surfaces are excluded altogether, since the internal air cavity is excluded in principle. Instead, the direct installation of the LED was applied by soldering onto conductive heat-removing copper plates and deepening it and gluing it into the mirror body from the side of the reflective layer (Figure 2).

Structural parts of the LED mirror lamp: mirror body (glass) 1; reflective layer 2; optical silicone adhesive sealant - 3; copper conductive and heat sink plates 4; protective coating (electrical insulating heat-conducting compound) 5; LED 6; soldering 7.

The propagation of the light flux (shown by arrows) in the LED mirror light occurs as follows: the light from the LED 6 propagates through a thin layer of optical silicone adhesive sealant along the mass of the glass of mirror 1 and almost all of it immediately goes outside into the illuminated space. Reflection in the opposite direction occurs only at the glass-air transition boundary and is negligible, but the light returned to the mirror body will also be reflected from the reflecting layer 2 and will again go out. Loss of light in the body of the glass and when reflected from the mirror coating is about 5% for modern mirrors. In addition, since the LED is glued by the radiating side into the mirror body, its luminous surface is reliably protected from pollution and damage, and this LED surface also freely transfers its heat to the mirror mass.

The main heat flow in this design from the LED 6 through soldering 7 is transmitted to copper plates 4, which have a large area and quickly distribute the received heat from the LED over their mass due to the high thermal conductivity of copper. Further, already from the entire area of both sides of the copper plates 4, the heat diverges in one direction through a thin layer of adhesive sealant 3 to and from the mirror 1 into the environment, and also in the opposite direction through a thin layer of protective heat-conducting compound 5 directly into the environment. Thus, the paths of light and heat are extremely reduced. Air spaces on their paths are excluded, which means that harmful, reflecting and absorbing light boundaries of transitions of various media and materials are excluded, and at the same time, an air heat insulator is excluded. At the same time, this design uses inexpensive conventional materials in a minimal assortment.

Protective heat-conducting compound 5 can be eliminated in double-sided fixtures (Figure 3), consisting of two mirrors oriented by the reflective layer in opposite directions or volumetric fixtures (Figure 4) with any number of mirrors and having a fenced, but ventilated interior space. Flat one-sided and two-sided luminaires have complete tightness, which allows them to be used in any climatic conditions (except hot) and in water without additional protection. In bulbs, it is advisable to use copper plates 4 not curved, but curved and enlarged - for better heat transfer from the LEDs to the air passing through the internal space.

Claims (1)

LED mirror lamp, characterized in that the design of the lamp uses three main elements interconnected without air gaps: a mirror, which is both a heat sink and a reflector, an LED, copper plates, which are both conductors and radiators.