SU636450A1 - Device for light source heat dissipation - Google Patents

Description

one

The invention relates to lighting, and more specifically to a device for removing heat from a high-power light source.

A device for removing heat from a light source is known, which comprises a heat sink l attached to a housing and connected to the holder by a light source.

The temperature reduction in the well-known device is limited by the final (relatively small) number of heat-removing plates, dictated by the manufacturing and assembly technology, as well as by the small total area of contact between the plates, placed on the edge, with the cooled surface.

The purpose of the invention is to increase heat transfer.

This is achieved by the fact that the cage consists of a spring, copper wire bundles and two rings with protrusions located coaxially with the light source, one of which is fixed in the housing, and the other is floating, connected to the fixed ring around the perimeter through protrusions by copper wire bundles and stretching them spring fixed at their ends in these

rings, and the floating ring has a collar for contacting and fastening to the body.

FIG. 1 shows a device with a partial cut-out in a luminaire with a fluorescent lamp; general view; in fig. 2 - the same, with a partial cut-out in the lamp with an incandescent lamp; in fig. 3 - the same, with a partial cut-out, the heat sink of the elements in the absence of a cooled part (for example, a light source).

The device has a massive metal, a face ring 1 located around the neck of the light source 2, and which has direct thermal contact with the heat dissipating body of the lamp 3, as well as a floating ring 4, whose position in space is determined by a spring 5 whose end a and b are in accordance with the thicker openings of rings 1 and 4, and heat-removing elements 6, made of bundles of flexible copper wire in the form of closed flattened rings, which are put on the protrusions in and in the rings 1 to 4, respectively. For better thermal contact, the heat sink elements 6 are located in the slots of the rings 1 and 4,

For a more efficient heat removal, the floating ring 4 may have a shoulder e for thermal contact with the lamp body 3, and after installing the lamp 2, is fixedly attached to it with the help of the pressure ring 7.

The device works as follows.

When installing heat-removing elements b at an angle to the common axis of the device, the latter occupy the surface of the hyperboloid, and the circular clearance between them is obviously less than the minimum diameter of the cooled surface, for example, a light source 2.

When installing the light source 2, its surface tends to push apart the heat-removing elements b, but for this they must be bent, since in the absence of the light source 2 under the action of the expanding force, the spring 5 takes a linear position. When the heat-removing elements are bent b, the distance between the rings 1,4,7; the axial force decreases, respectively, with which the spring 5 acts on the floating ring 4. This force applied to the inclined heat-removing elements 6 decreases the inclination angle of the latter , as a result of which the floating ring 4 is established in an equilibrium position with a shift angle relative to the fixed ring 1 smaller than the initial one.

In order to optimally effect axial and tangential forces on the floating ring 4, the spring 5 can be made of rectangular wire. Such a position of the device with selected dimensions provides the most complete fit of the heat-removing elements b to the cooled surface and due to

This is the most efficient heat sink. After installing the light source 2 and occupying an equilibrium position in space with the device, the floating ring 4 can be pressed against the body of the luminaire 3 to create a more efficient heat sink.

Good cooling of the hottest part of the lamp bulb enhances the convective flows of the gas that fills the lamp, thereby reducing the temperature of the entire bulb, as well as the base part. This device allows the use of higher power lamps in explosion-proof luminaires, or with the same power to reduce the dimensions of the lamp.

Claims (2)

1. A device for removing heat from a light source, which contains a heat sink attached to the housing of the light source holder, characterized in that, in order to increase heat transfer, the sleeve consists of a spring, copper wire bundles and two protrusion rings arranged coaxially with the light source, one of which is fixed in the housing, and the other is floating, connected to the fixed ring around the perimeter through the protrusions by bundles of copper wire and a spring stretching them fixed by the ends in these rings. 2. The device is made of pl, m and so that the floating ring has a collar for contact and fastening to the body. Sources of information taken into account in the examination: 1. Copyright certificate № 528424, CL R 21 V 29/00, 1974.