JPS61161649A - Microwave discharging light source device - Google Patents

Abstract

PURPOSE:To prevent the overheat of the wall of a lamp tube and the shortened life of the lamp by mounting a protrusion to the wall portion of the lamp in the opposite side to the cooling wind blow-off direction of a microwave discharging light source device. CONSTITUTION:A protrusion 17 with more than 10mm length is mounted on the wall portion of a lamp tube in the opposite side to a lamp 9 supporting rod 10. The protrusion 17 may be in contact with a cavity wall 7. Cooling wind blown off from a feeding entrance 8 fully cools the feeding entrance 8 side of the lamp, and the opposite side of the entrance 8 is cooled by the thermal conduction from the protrusion 17 mounted on the opposite side of the entrance 8 rather than the cooling wind. Since the protrusion is brought in direct contact with the cavity wall, the heat from the lamp is moved to the cavity wall, and the cooling efficiency can be further improved. If the protrusion 17 has less than 10mm length, the cooling efficiency is insufficient.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is a microphone A-wave broadcasting IE7f! : Light source device used.

[Prior Art] Figure 3 is a sectional view showing a conventional microwave discharge light source device shown in, for example, Utility Model Application Publication No. 59-158119. ) is a magnetron, (21 is a magnetocon antenna, 131 is a waveguide, (4? is a ventilation hole, [52 is a microwave resonant cavity, and the cavity wall (6) is connected to the end of the waveguide +31. It consists of a light transmitting member (7) made of a cylindrical metal mesh.(8) is a secondary feed port provided in the cavity wall (6), and is connected from the waveguide +31 into the microwave resonant cavity (5). 193 is a spherical electrodeless rung placed inside the microwave resonant cavity (5), which connects the lamp fixing part αυ and the adhesive t13 with a rung supporting loincloth. The lamp fixing part αD is fixed to the cavity wall (61) with a screw α3.

A reflector that reflects the light emitted from the a41F1 rung +91, 19 is a cooling fan that cools the magnetron (11) and rung 191, and tte is a box that covers the entire thing. (
17') has a protruding thick part.

Next, the operation of this system will be explained. The microwave oscillated by the magnetron (1) is radiated into the waveguide (3) through the magnetron antenna (21), this microwave propagates through the waveguide (3), and is transmitted through the feed port (8) into the microphone A wave. It is radiated into the resonant cavity (5) and forms a microwave electromagnetic field inside the cavity 15. This microwave electromagnetic field discharges the gas inside the silange (9) and heats the tube wall.
Metals such as mercury in the lamp (9) evaporate.

When the metal gas is gasified and discharge occurs, light having a unique emission spectrum depending on the type of metal is generated. This light passes through the cylindrical metal mesh (7) and passes through the cavity (5).
), is reflected by the first reflecting plate a4, and is emitted forward. On the other hand, magnetron (1) and rung 1
91 It is necessary to cool the magnetron 11) by blowing air through the 7th An αS.

Furthermore, this air cools the lamp 19 through the ventilation port (transmission and power supply port (8)), and then the cylindrical metal mesh (7).
More exhaust.

Problems to be Solved by the C Design] The cooling of the lamp (9) in the conventional microwave discharge light source device as described above is such that the power supply port (8) side of the lamp 193, which is directly exposed to the cold air, is well cooled. The side opposite the opening (8) is difficult to cool and is difficult to deteriorate due to overheating of the lamp.
Rare due to short lifespan. This invention.

This was done to solve the following problems.

The aim is to effectively cool the power supply port and the opposite flll of the rung, prevent overheating, prevent deterioration of the lamp, and extend the life of the rung. Furthermore, it is possible to increase the output of the rung.

[Means for solving problems]

The microwave discharge light source device according to the present invention has a projection having a length of 100 or more on the wall portion of the rung tube on the opposite side to the gas blowing direction. Further, in a microwave discharge light source device according to another aspect of the present invention, the top of a protrusion is provided on the rung tube wall on the opposite side to the gas blowing direction, and the top of the protrusion is brought into contact with the microwave cavity wall.

[Effect]

In order to ensure that the poor gas blown out toward the lamp flows through a protrusion with a length of 101111 or more provided on the lamp, conventionally, the gas is directly hit and the opposite side to the direction of the gas blowing out. heat dissipation from the tube wall is promoted. In addition, since the protrusions are brought into direct contact with the cavity wall, heat from the rung is transferred to the cavity wall, and further cooling effects can be expected.

〔Example〕

FIG. 1 is a cross-sectional view of a microwave number 100-degree light source device showing one embodiment of the present invention, and FIG. 2 is a cross-sectional view showing the structure of an improved rung used in this device. In the figure, (l) to αeFi are exactly the same as the above-mentioned conventional device. an
may be in contact with the cavity wall (7). In this case, the length does not necessarily have to be greater than tOW. (11I is defined by a streamline showing the flow of cold air blown from the power supply port (8).) The cold air blown from the power supply port (8) is
8) side, and the opposite side of the power supply port (8) is cooled by cold air.
It is cooled by heat conduction from the protrusion αn which is larger than wt. Note that when the length of the protrusion aη was less than 10I, the effect was insufficient. By the way, in the above explanation, the case where the cooling air is blown onto the lamp from the four sides of the support rod of the lamp has been described, but it goes without saying that the present invention can also be applied to the case where the cooling air is blown onto the rung from other directions.

〔Effect of the invention〕

As described above, this invention has a simple structure in which a protrusion of 10 f1 or more is provided on the lamp tube wall portion on the opposite side to the cooling air blowing direction. Prevent the lamp from overheating and shorten the life of the lamp. Also.

Because the protrusion was in contact with the microwave cavity wall + '＊
This improves the cooling effect of the rung, prevents overheating of the entire rung, and enables higher output.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a sectional view showing an improved thought lamp structure, and FIG. 3 is a sectional view showing a conventional microwave discharge light source device. In the figure, (1) is a magnetron, (2: is a magnetron antenna, (31 is a waveguide, (41 is a ventilation hole, (
5) is a microwave resonant cavity, (6: is a cavity wall, (7) is a light-transmitting member, (8) is a power supply port, (9J is a lamp, αl
is a rung support rod. αD is the rung fixing part, z is the adhesive, (13 is the screw, (
14 is a reflector, α9 is a cooling fan, IIs is a box body, α sword protrusion 2 (17°) is a protruding thick part, (US is a streamline. Note that the same symbols in each figure are the same or different. 9 indicates a considerable portion.

Claims (2)

[Claims] (1) In an electrodeless discharge lamp that emits light excited by microwaves in a microwave cavity, and has forced lamp cooling means for cooling the lamp by blowing gas onto it, the lamp tube wall portion on the opposite side from the direction in which the gas is blown out. A microwave discharge light source device, characterized in that a protrusion having a length of 10 mm or more is provided. (2) In an electrodeless discharge lamp that emits light excited by microwaves in a microwave cavity, and has forced lamp cooling means for cooling the lamp by blowing gas onto it, the lamp tube wall portion on the side opposite to the direction in which the gas is blown out. 1. A microwave discharge light source device characterized in that a protrusion of arbitrary length is provided on the holder, and the top of the protrusion is brought into contact with a wall surface of a microwave cavity.