JPS59119668A - Halogen lamp of double structure - Google Patents

Abstract

PURPOSE:To maintain an exterior glass bulb at low temperature so as to enable a halogen lamp to be used widely by installing a small halogen lamp in the center of the internal space of the exterior bulb and evacuating the space between the exterior bulb and the halogen lamp. CONSTITUTION:After a small halogen lamp 2 charged with a halogen gas 9 is installed in the center of the internal space of an exterior glass bulb 1, a space 8 between the exterior bulb 1 and the small halogen lamp 2 is evacuated thereby constituting a halogen lamp of double structure. As a result, the halogen cycle of the small halogen lamp 2 can be carried out efficiently without increasing the temperature of the surrounding atmosphere. Besides, the exterior bulb 1 is maintained at low teperature by blocking thermal conduction, and it becomes possible to provide an infrared-ray absorbing film formed by vapordeposition on the exterior bulb 1. Consequently, irradiation of cool light without any infrared rays can be obtained easily.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention particularly relates to a double-structured halogen lamp in which a small halogen lamp is housed within an exterior glass bulb.

Conventionally used halogen lamps that emit a unique, strong white light require the temperature inside the bulb to be maintained at a high temperature in order to activate the halogen cycle, which is a characteristic of this lamp.This temperature can exceed several hundred degrees. had reached. For this reason, when using this type of halogen lamp, the current situation is that the heat of the glass bulb and the temperature of its surroundings are constantly rising. To avoid this, for example, if the temperature inside the bulb is lowered by forcibly cooling it from the outside, the halogen cycle will not be fully utilized, resulting in a shortened lamp life. For this reason, it was difficult to use halogen lamps.

In order to eliminate the above-mentioned drawbacks of halogen lamps, the present invention, as a result of intensive research, doubles the structure of the glass bulb and incorporates a small halogen lamp inside the exterior bulb. While a halogen lamp maintains a high temperature and fully utilizes the halogen cycle as usual, 1. To provide a halogen lamp capable of keeping an exterior glass bulb at a low temperature by creating a vacuum between the halogen lamp and the exterior glass bulb to block heat conduction by gas convection to the exterior glass bulb.

To explain the present invention with reference to the accompanying drawings, Figure 1 shows a double-structured halogen lamp in which a small horizontal halogen lamp (2) is built into a vertically shaped exterior glass bulb (1). The first figure shows a small horizontal halogen lamp (-2) inside a horizontally shaped exterior glass bulb (1).
) shows a double-layered halogen lamp with a built-in halogen lamp. Furthermore, Figure 3 shows a vertically shaped exterior glass bulb (
1) shows a double-structured halogen lamp in which a vertical halogen lamp (2) is built-in. (1) indicates an exterior glass bulb, and (-2) indicates a halogen lamp built in the center of this exterior glass bulb (1). (3) shows the filament of the halogen lamp (,2). (ll-) Glass beads for sealing a halogen lamp (λ). (!i) indicates a lead wire that connects the filament (3) of the halogen lamp (-2). (B) is an exterior glass bulb (1)
(g) is the glass piece for sealing the outer bulb (
The vacuum part in 1), (wa) indicates the halogen gas filled part.

The dual-structured halogen lamp G of the present invention has the above-mentioned structure, and its major feature is that it is an efficient halogen lamp that can perform a sufficient halogen cycle without raising the surrounding temperature. (1) Installation is possible by standardizing the size. Furthermore, because conventional halogen lamps generate high temperatures due to the halogen cycle, it was impossible to provide a film on the bulb itself to absorb heat, or to mold the glass that forms the bulb itself from heat-absorbing glass. However, if a vacuum is created between the halogen lamp (2) and the exterior glass bulb using a double structure as in the present invention, heat convection will not occur and the temperature rise of the exterior glass bulb (1) will be lower than that of the conventional vacuum type. Since it is about the same size as a light bulb, it is possible to emit cool light that eliminates infrared rays by vaporizing an infrared absorbing film on the inside or outside of the outer glass bulb, or by molding the outer bulb itself with infrared absorbing glass. It is also easy to do. At this time, the exterior bulb absorbs infrared rays, so the temperature of the exterior bulb will rise to some extent, but if this temperature rise is harmful, the exterior bulb can be forcibly cooled from the outside. I believe that it has a great effect in making it possible to use it in places with heavy loads, where the built-in halogen lamp has no effect on the halogen cycle of the built-in halogen lamp.

[Brief explanation of drawings]

1, 1 and 3 show an embodiment of the double structure halogen lamp of the present invention. (1)...Exterior glass bulb (2)...Halogen lamp

Claims (3)

[Claims] (1) A small halogen lamp (2) is built into the center of the exterior glass bulb (1) to create a double structure, and the space formed between the exterior glass bulb (1) and the halogen lamp (2) is evacuated. A double-layered halogen lamp with a unique feature. (2) A dual-structure halogen lamp according to claim (1), wherein a vapor-deposited film for absorbing infrared rays is formed on the inside or outside of the exterior glass bulb (1). (3) Exterior glass bulb (1) The dual-structure halogen lamp according to claim (1), which is molded from infrared absorbing glass.