WO2014209153A1

WO2014209153A1 - Light column

Info

Publication number: WO2014209153A1
Application number: PCT/RU2013/000545
Authority: WO
Inventors: Антон Борисович ДРОБЫШЕВ
Original assignee: Drobyshev Anton Borisovich
Priority date: 2013-06-26
Filing date: 2013-06-26
Publication date: 2014-12-31

Abstract

The invention relates to the field of lighting equipment and can be used for decorative lighting of building interiors. The technical result consists in providing uniform and effective cooling of the trunk of a light column and in using high-power light sources in a relatively compact device with the possibility of using decorative effects. The light column comprises a trunk (1) consisting of a light-scattering material, with light sources (11) comprising power supply and control units (12) being arranged in one or both ends of said trunk (1), light-reflecting elements (13) supporting a base (5) and a top (10) of the trunk, a thrust mechanism (6), and a passive system for cooling the trunk (1) in the form of a de Laval nozzle.

Description

Light column

The invention relates to the field of lighting equipment and can be used for decorative lighting of interiors.

The relevance of the invention is determined by the needs of the market in creating new solutions for decorative lighting and advertising information lighting devices with a variety of color-dynamic effects, with new

consumer qualities.

Known installation (patent Ne RU29175), including a base on which decorative elements are mounted, located with the possibility of contact with the base and / or with a gap relative to it, the decorative elements are made volumetric and / or flat, transparent and / or opaque and made of composite polyester materials while at least one decorative element is stationary relative to the base and / or other

decorative elements and at least one decorative element is mounted with the possibility of movement relative to the base and / or other decorative element, and the base has controllable light sources built into it, arranged to provide volumetricity and made in the form of separate lamps and / or fiber optics. The disadvantage of this installation is strong heating and a very probable deformation of the structure. A device is known (patent N ° RU2361284) for decorative lighting and displaying information, comprising two light guide elements installed intermittently, diffusely reflecting and / or diffusely translucent signs applied to wide surfaces of light guide elements, point light sources, optically coordinated with the end surfaces of each of the light guide elements and electrically connected to the electronic control unit, characterized in that the device is additional Tel'nykh introduced, at least one volume element with flat and / or curved surfaces with deposited thereon character- graphic signs, and between the volume element and at least one light guide elements is set

light-optical connection, while the volumetric and light-conducting elements are placed in space relative to each other with linear and angular displacements, forming together

spatial shape, and the linear displacement value of at least one of the light guide elements relative to the volume element, at least one coordinate selected in excess of the width, height or length of the volume element, and the value of the angular displacement of the light guide element in two coordinates is selected from the interval values of 0 ° - 180 °.

The disadvantage of this device is also the strong heating of the structure and the high probability of its deformation. Known decorative lighting device (patent N °

US7,914, 182), consisting of a light device, including a radiator and a light source in thermal contact with a radiator, a casing,

the covering radiator sets the air path between the air inlet and outlet, the inlet being vertically below the outlet, in order to direct the air flow above the radiator and to ensure the air outlet from the casing above the light fixture, while the casing located centrally symmetrically, and the radiator includes a base, ribs that extend upward from the base and diverge in rays from the central axis, and a central coaxial column extending upward from the base of the radiator

perpendicular to it, while some edges border

internal faces with a column, and some are located at a distance from the column.

The disadvantage of this device is the design complexity of the cooling system. A device is known (patent N ° RU2399832), selected as a prototype, in the form of a light tube made of optically transparent heat-shrinkable material, inside of which

LEDs are installed, followed by heat treatment of the tube, the LEDs are placed on a printed circuit board installed tightly inside the tube and dividing the tube’s internal space into the upper technological and lower illuminating halves, with the condition of ensuring air access to the upper part of the tube, along the longitudinal axis of which a hole is made against each LED for convection cooling of LEDs. The disadvantage of this device is the uneven, and therefore inefficient cooling of the tube material, which can lead to its deformation.

The proposed device allows to eliminate this drawback, namely, to ensure uniform and effective cooling of the trunk of the light column, and to use powerful light sources in a relatively compact device with

the possibility of applying decorative effects.

The task is achieved through the use of a specially designed and optimized cooling system light columns. In this case, in a light column containing a barrel made of light-scattering material, at one or both ends of which there are light sources with power supply-control, bearing the base and top of the barrel, 5 reflective elements, as well as a passive cooling system for light sources, power supplies - control, barrel and other elements of the column, reflective elements are made in the form of a Laval nozzle. In this case, the guide vanes (profiled guides) are located in the confusor (tapering in the direction of air flow) part of the nozzle in the lower part of the column and diffuser

(expanding in the direction of the air flow) part of the nozzle in the upper part of the column.

In addition, the task can be achieved by the fact that in the supporting base and the trunk of the light column additionally

15, tangential holes are made with expansion inward of the column, and in the bearing pommel - with expansion outward, while the holes in the column barrel are arranged in a spiral curve, and in the case of a barrel made with flutes, in the recesses of the flutes.

In FIG. 1 shows a diagram of the proposed device, where: 1 - 20 trunk light column; 2 - decorative base; 3 - decorative top (capital); 4 - supporting surfaces (upper - ceiling, lower - floor or special furniture, etc.); 5 - bearing base of the light column; b - thrust mechanism with a power element

(e.g. spring); 7 - supporting transition element from the power 25 element 6 to the bearing base 5; 8 - supporting transition element from the barrel 1 to the power element 6; 9 - a friction lining; 10 - bearing top; 1 1 - light source; 12 - power supply control unit of the light source; 13 - part of the nozzle, deployed inside the barrel of the column, it is also a mirror reflector (if located in the base of the column is a diffuser - an expanding part the nozzle, if it is located at the top, is a confuser - the tapering part of the nozzle); 14 - part of the nozzle deployed to the supporting surface (in the case of location at the base of the column is a confuser - the tapering part of the nozzle, and if located at the top is a diffuser - an expanding part of the nozzle); 15 - guide blades in the nozzle (form the air flow for the most efficient cooling of the power-control unit); 16 - a gap (slot) with additional windows (holes) between the bearing 5 and decorative 2 bases and decorative top 3 (serves for air flow from below, as well as air outflow from above and for cable laying); 17 - an additional dust filter; 18 - input dust filter; P1, T1 - respectively, pressure and temperature at the lower supporting surface (floor); P2, T2 - respectively, pressure and temperature at the upper reference

surface (ceiling); RP, TK - respectively pressure and

temperature inside the light column; dashed arrows - the direction of air movement.

Structurally, the light column is made with the possibility of installation opposite to the supporting surfaces 4 and contains a thrust mechanism with a power element 6, including the barrel of the column 1 and at least one bearing base 5 and / or one bearing top 10.

The light column is cooled by

ventilation inside the trunk of the light column. Ventilation is based on the effect of draft (vacuum) in long vertical channels with a column of warm air inside. The density of the heated air is less than the density of the colder, therefore, the pressure of the column with a height h is lower. This circumstance leads to the appearance of a pressure difference inside and outside the light column. The greatest rarefaction is achieved in the lower part of the light column inside decorative base, where there is the greatest difference in the density of air inside and outside the light column at the lower supporting surface. The driving force of traction is determined by the difference in the heights of the inlet and removal of air from the light column. In addition to cooling the elements of the light column due to air traction at the locations of light sources and power-control units requiring intensive cooling,

special devices are installed, made on the principle of a Laval nozzle. As air moves through such a nozzle, its absolute temperature T and pressure P decrease, and the air velocity V increases.

The nozzles 13, 14 in the construction of the light column are

local accelerators of air flow arising from traction.

The light sources 11 located inside the nozzles, as well as

power-control units located near the nozzles 12

cooled more intensely.

For the most efficient distribution of air flows around the power-control unit asymmetrically located with respect to the nozzle axis, profiled guides 15 can be formed in the nozzle, forming an asymmetric air flow.

Structurally, each nozzle is made in conjunction with a mirror reflector around the light source. Part of the nozzle, deployed inside the column barrel and having a mirror coating, performs the function of a mirror reflector. Since the lighting function is primary for the light column, and the auxiliary cooling function, profiling of the reflector (part of the nozzle 13 that performs its function) at the stage of design of the light column is carried out without taking into account the cooling function. The part of the nozzle 14, deployed to the corresponding supporting surface, will perform only the cooling function. At the design stage, the form of this parts of the nozzle are optimized only to achieve optimal cooling. It is in this part of the nozzle that profiled guides 5 can be arranged for forming

asymmetric air flow. The optimization of the shape of the reflector and nozzle is carried out separately from each other in special

computer programs.

To increase the efficiency of the functioning of the barrel cooling system 1, light sources 1 1 and power-control units 12 in the bearing base 5 and the wall of the side surface of the barrel 1 of the column, tangential openings with

expansion into the column, and in the bearing top 10 - with

outward expansion (not shown conditionally in FIG. 1), with holes in the wall of the side surface of the barrel 1 of the column

it is advisable to arrange along a spiral curve to create a vortex effect inside the column. In the case of supplying the barrel 1 of the column with flutes, tangential openings can be made in the recesses of the flutes, which enhances the above effect.

The work of the proposed device is as follows. After the light source 1 is turned on, relatively cold air from the bottom of the column through the gap (slot) 16 with additional windows (holes) between the supporting surface 4 and the decorative 2 and base 5 of the light column is sucked in through the inlet dust filter 18 and an additional dust filter 17 into the area with a reduced pressure inside the barrel 1 of the column. When the light source 1 1 is located in the lower part of the column, the air draft reaches its maximum value, since the light source 1 1 located in the lower part of the light column and the power-control unit 12 heat the air more strongly in the lower part and contribute to a greater discharge. When the light source 1 1 is located in the upper part of the column, the air flow as it passes through the nozzle with parts 13 and 14 is additionally accelerated and intensively cools the light source 11 and the power-control unit 12. The profiled blades 15 installed in the confuser part 14 of the lower nozzle contribute most effective air flow in the area of the lower power-control unit 12 and, accordingly, its effective

cooling. Air rises along the barrel of 1 column to its upper part. As it moves, it cools the heated internal

barrel surfaces 1. When passing through the upper nozzle with parts 13 and 14, air is additionally accelerated and intensively cools the upper light source 1 1, as well as the upper power-control unit 12. Specially profiled blades 15 installed in the diffuser part 14 of the upper nozzle contribute to the most efficient air flow in the area of the upper power-control unit 12 and, accordingly, its better cooling. Heated air through the gap (slot) 16 with additional windows (holes) between the supporting surface 4 and the decorative top (cap) 3 leaves the column to the outside, providing a continuous flow of colder air from below.

The combination of the nozzle 13 with a mirror reflector is possible due to the similar shape of the reflector and part of the nozzle, and also due to the fact that the nozzle 13 and the reflector, despite different functions in the same area, "serve" the same element of the light column - the light source. The reflector distributes the light flux, and the nozzle cools.

In the upper part of the light column, the air draft is of the least importance, since the difference in the heights of the air approaching to the upper part of the column and the air exit from the column is the smallest. Under these conditions, a nozzle 13 located around the upper light source most in demand, since it additionally accelerates and cools the slow air flow and forms a flow around the upper power-control unit 12.

The light column cooling system is

self-regulating system with feedback: the more intense the heat transfer of the elements of the column, the greater the discharge of air around them and the greater the traction force and, accordingly, the air flow rate, and, consequently, the cooling rate.

Thus, the proposed device allows for efficient cooling of the light source, the barrel and the power supply-control unit of the light column and, in general, significantly improve the operational properties of the light column in a wide range of its light characteristics.

Claims

Claim

Light column containing a barrel made of

light-scattering material, in one or both ends of which there are light sources with power-control units that support the base and top of the trunk,

reflective elements, a thrust mechanism, as well as a passive cooling system for the barrel, light sources and power-control units, characterized in that the passive cooling system is made in the form of Laval nozzles installed inside the column barrel and equipped with profiled guides in the confuser part of the nozzle mounted in the lower parts of the column, and the diffuser part of the nozzle,

mounted at the top of the column.

The light column according to claim 1, characterized in that tangential openings are made in the bearing base and in the column barrel with expansion inward of the column, and in the bearing top with expansion outward, while the holes in the column shaft are arranged in a spiral curve.

The light column according to claim 1, characterized in that

reflective elements are made in the form of parts of Laval nozzles directed inside the column barrel.

The light column according to claim 2, characterized in that the barrel of the column is provided with flutes, and the tangential openings are made in the recesses of the flutes.