JPS6130364B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for effectively air-cooling a high-temperature light source and a reflector in a horizontally lit searchlight using a high-output xenon lamp or the like.

Lamps such as xenon lamps used in high-output searchlights consist of a bulb part, a positive electrode, and a cathode base.If the bulb is left at high temperatures, the upper part of the bulb will become locally overheated and thermal distortion will occur. Because the material is brittle, there is a risk that it will succumb to internal pressure and burst. In addition, in all caps, cracks occur at the joint between the metal of the conductive part and the sealed part of the glass body (quartz glass) connected to the bulb, creating a so-called air bulb, resulting in defects such as failure to emit light.

To compensate for these shortcomings, it is necessary to keep the temperature at the mouthpiece below 180°C using forced ventilation.
Further, the reflector may be made of soda glass in ordinary searchlights, but in high-power searchlights, Pyrex, which has high heat resistance, is used, which is extremely expensive. This Pyrex reflector also has quite uneven heat distribution, and if localized overheating occurs, it will crack and break. In addition, the reflector on the back of the reflector is plated with silver, and since the paint used to prevent this silver plating from oxidizing deteriorates, this outer surface is covered with a metal protective frame to prevent heat storage in the glass body. We want to dissipate heat from the surface of this metal protective frame as quickly as possible, but in the past, only heat conduction through contact with the holding bracket of the reflector was used, and the main focus was placed on air cooling the lamp. Air cooling of the reflector was performed secondary. Since the reflector is a rotating parapet surface, the light source is placed near its focal point, and the higher the output of the searchlight, the more the temperature distribution will be extremely different from the surrounding area, and this uneven heat distribution can cause cracks. Therefore, in the present invention, the reflecting mirror is also air-cooled from the outer surface of its protective frame to enhance the cooling effect.

That is, in the present invention, the first, second, third, and fourth air chambers are provided, and in addition to the forced ventilation air flow, the jet effect of the finally exhausted air flow is utilized. It is an object of the present invention to provide an extremely highly efficient air cooling device that air-cools a reflecting mirror not only from its front surface but also from its back surface.

Embodiments of the present invention will be described below with reference to the drawings.

In the present invention, outside air is sucked in by a blower 9 through the intake hole 7' and the vent 8' of the back cover 7 of the lantern 3, and the air is introduced into the wind tunnel body 10 from the outlet 9'' of the blower 9. Cooling the xenon lamp bulb 12 protruding from inside the wind tunnel body 10 onto the optical axis of the reflecting mirror 28,
This invention relates to an improvement of a horizontally lit searchlight in which air warmed by the lamp is exhausted to the outside of the lamp casing 3 through a lamp body exhaust port 3'.

A first air chamber () in which the blower intake port 9' of the blower 9 resides is provided at a position behind the reflecting mirror 28, and a second air chamber () is provided between the reflecting mirror 28 and the searchlight front glass 1. An internal partition plate 30 is connected to the metal reflector mounting frame 28' and protrudes from the rear of the reflector 28, and is provided between the wind tunnel outer wall 31 and the lantern side wall 17 so as to be substantially orthogonal thereto. A substantially doughnut-shaped third air chamber ( ) is formed between the rear partition plate 26 and the lantern side wall 17 , and a reflector protection frame 28 '' is provided inside the third air chamber ( ). A fourth air chamber is formed between the internal partition plate 30, the rear partition plate 26, and the wind tunnel outer wall 31.

A vent hole 26 with a check valve that prevents backflow from the fourth air chamber () to the first air chamber () is provided in the rear partition plate 26 between the first air chamber () and the fourth air chamber (). ', and an air exhaust point 32 from the third air chamber () to the lamp body exhaust port 3'.
In addition, the jet air flow generated by the air discharge generates a negative pressure in the vicinity of the air outlet 30' in the fourth air chamber (), and the air in the fourth air chamber () is sucked out. A suction part 30'' is provided, and the air that flows in the third air chamber () in left and right directions is passed through the guide plate 33 of the air suction part 30''.
When the air is discharged from the lamp body exhaust port 3' along the direction, a negative pressure is generated in the air suction part 30'' sandwiched between the two guide plates 33, so that the air in the fourth air chamber () is sucked out. By doing so, the pressure in the fourth air chamber () is considerably lower than the pressure in the first air chamber (), and the cold air (in contact with the outside air) in the first air chamber () is ventilated. Mouth 26'
It flows into the fourth air chamber () through the reflecting mirror 28.
(in the illustrated embodiment), and the reflecting mirror 28 is cooled by this cold airflow also from the back side. In the figure, 2 is a front cover, 5 is a lamp cooling fin, and 7 is a rear cover, in which an air intake port 7' is formed. Reference numeral 8 denotes the inner wall of the rear lid, and a vent hole 8' communicating with the first air chamber () is bored therein. Reference numeral 10' denotes a constricted part of the wind tunnel body. The constricted part 10' acts as a nozzle for air circulation, and the air passing through this is accelerated to achieve the effect of the invention of Utility Model Registration No. 1132291. . 11 is a rear cover of the wind tunnel body, 13 is a sleeve, 14 is a socket, and 15 is a socket insulator. Reference numeral 16 denotes a lamp anti-vibration metal fitting, in which the air that has cooled the bulb 12 of the xenon lamp as described above passes through the gap 16 between the light-shielding ring 16' and the lamp anti-vibration metal fitting 16. The portion enters the second air chamber ( ) through the notched groove 18 ′ of the lamp vibration isolating rubber 18 . 27 is a ventilation partition serving as a boundary between the second air chamber and the third air chamber;
7' and 27' are drilled. The xenon lamp has a high temperature, and the air that comes into contact with it and reaches the second and third air chambers has a considerably high temperature, making it unsuitable for cooling. In the illustrated example, the vent 27',
27' is bored in the upper or middle part of the lantern 3, and the air that flows into the third air chamber () through the vents 27', 27' is divided into left and right and descends to the lamp body exhaust port 3'. However, as mentioned above, the air in the fourth air chamber is sucked out by the jet air flow of the air discharged at the air discharge point 32, and the air in the fourth air chamber is sucked out. A considerable amount of airflow is generated within the fourth air chamber ( ).

The present invention has the above-mentioned configuration, and has a fourth air flow that cools the reflecting mirror 28 from the back side separately from the air flow that cools the horizontally lit lamp (flow in the second and third air chambers). An air flow is provided in the air chamber (), and when the air is discharged from the third air chamber () to the outside, a jet air flow is generated to suck out the air in the fourth air chamber (), and the following Thus, a large air flow suitable for cooling the reflector is generated in the fourth air chamber ( ), thereby economically providing a cooling device capable of sufficiently cooling not only the lamp but also the reflector 28.

[Brief explanation of the drawing]

The drawings show an embodiment of the air cooling device for the lamp and reflector in a high-output search light according to the present invention, and FIG. 1 is a vertical side view of the lamp body, and FIG. 2 is the same as above with the front cover removed. Partially cut away front view, 3rd
The figure is a partially cutaway rear view of the lamp body. 1 is the front glass, 2 is the front lid, 3 is the lamp casing, 3' is the lamp exhaust port, 5 is the lamp cooling fin, 7 is the rear lid,
7' is an intake hole, 8 is an inner wall of the rear lid, 8' is a vent, 9 is a blower, 9' is a blower intake port, 9'' is an air discharge port, 10 is a wind tunnel body, 10' is a wind tunnel body narrowing part, 1
1 is the wind tunnel body rear cover, 12 is the xenon lamp bulb,
12' is a xenon lamp negative electrode base, 12'' is a xenon lamp positive electrode base, 13 is a sleeve, 14 is a socket, 14' is a ring-shaped spring, 15 is a socket insulator, 16 is a lamp vibration-proof metal fitting, and 16' is a light-shielding ring plate. , 16' is the positive electrode support, 16 is the gap, 17 is the side wall of the lamp casing, 18 is the lamp vibration isolator, 18' is the notch groove, 26 is the rear partition plate, 26' is the vent, 26'' is the seat valve ( check valve), 27 is a ventilation partition, 2
7' is a vent, 28 is a reflector, 28' is a reflector mounting frame, 28'' is a reflector protection frame, 29 is a reflector holding frame, 30 is an internal partition plate, 30' is an outlet, 30'' is an air A suction part, 31 is an outer wall of the wind tunnel 10, 32 is an air discharge point, 33 is a guide plate, () is a first air chamber, () is a second air chamber, () is a third air chamber,
() is the fourth air chamber.

Claims (1)

[Claims] 1. A blower sucks in outside air from outside the lantern and introduces the air from the blower's outlet into the wind tunnel.
In the high-output searchlight, the lamp bulb protruding from inside the wind tunnel onto the optical axis of the reflector is cooled, and the air warmed by the lamp is further exhausted to the outside of the lamp housing through the lamp body exhaust port. A first air chamber in which the blower intake port of the blower exists is provided at the rear of the reflector, and a second air chamber is provided between the reflector and the front glass of the searchlight, and is connected to the required location of the reflector to the rear of the reflector. forming a third air chamber between a protruding internal partition plate, a rear partition plate provided between the wind tunnel outer wall and the lamp case side wall substantially perpendicular thereto, and the lamp case side wall; A fourth air chamber is formed inwardly of the third air chamber between the rear wall of the reflector, the internal partition, the rear partition, and the outer wall of the wind tunnel, and between the first air chamber and the fourth air chamber. A vent hole with a check valve that prevents backflow from the fourth air chamber to the first air chamber is bored in the rear partition plate of the lamp, and at the point where air is discharged from the third air chamber to the lamp exhaust port, An air suction section is provided which generates a negative pressure near the air outlet of the fourth air chamber by the jet air flow of the air discharge, and sucks out the air in the fourth air chamber. Air cooling system for lamps and reflectors in output searchlights.