JPH0620601A - Sealing method for mercury in discharge lamp - Google Patents

Abstract

PURPOSE:To provide a mercury sealing method by which auxiliary amalgam can be used even in the case of an amalgam type discharge lamp using a dispenser. CONSTITUTION:In a mercury sealing method for a discharge lamp, where a fixed amount of mercury is sealed in a bulb by means of a dispenser 6, and a metal (the amalgam metal) 8, which forms an amalgam with the mercury, is arranged in the vicinity of the dispenser 6, the mercury is released from the dispenser 6 by lighting the discharge lamp through an induction field.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge lamp which discharges and emits mercury vapor sealed in a bulb, and more particularly to a method of sealing mercury therein.

[0002]

2. Description of the Related Art In a discharge lamp containing mercury,
It is important to control the mercury vapor pressure, and when the temperature of the discharge lamp becomes high, the mercury vapor pressure rises excessively, exceeds the optimum vapor pressure, and the efficiency decreases.

As a solution to this problem, there is a method using a metal that forms amalgam with mercury (amalgam metal).
In this case, the temperature of the amalgam that achieves the optimum mercury vapor pressure can be controlled by the mixing ratio of the metal and mercury used.
Further, the temperature range for achieving the optimum mercury vapor pressure can be widened.

However, since amalgam has an optimum vapor pressure when the lamp becomes hot, when the lamp is cold, for example, when the lamp is started, the vapor pressure is considerably low and the lamp is dark. Therefore, there is a method of placing another amalgam (auxiliary amalgam) in a portion having a high temperature immediately after the lamp is turned on, in order to improve a decrease in light amount immediately after the lamp is turned on.

Further, in a discharge lamp using amalgam (amalgam type discharge lamp), it is important to control the mixing ratio of amalgam metal and mercury, and this mixing ratio influences the temperature characteristics of the discharge lamp.

[0006] Solid amalgam metal can be weighed and sealed in a fixed amount in a valve, but a small amount of mercury, which is a liquid and a very small amount compared to amalgam, must be sealed in a valve. Is difficult

Generally, a dispenser in which a certain amount of mercury is melted is enclosed in a bulb, and after the lamp is evacuated, the dispenser is red-heated by high frequency induction heating to release the mercury, thereby enclosing a certain amount of mercury.

[0008]

By the way, in the amalgam type discharge lamp as described above, when a dispenser is used, the ring-shaped dispenser is generally attached to the enclosing line or the supporting line of the stem for encapsulation. In addition, when an auxiliary amalgam is used, it is generally attached to the stem enclosing line or the supporting line as a place where the temperature becomes high immediately after the lamp is turned on. Therefore, the auxiliary amalgam is arranged in the vicinity of the mercury dispenser.

In this case, in order to release mercury from the dispenser after exhausting the lamp, the dispenser is red-heated by using the high frequency induction heating device as described above.
Since the high-frequency induction heating device rapidly heats the dispenser in a short time to release mercury, the auxiliary amalgam in the vicinity of the dispenser is also heated, and the auxiliary amalgam melts and scatters. Therefore, the amalgam type discharge lamp using the dispenser cannot use the auxiliary amalgam.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a method of enclosing mercury in a discharge lamp which can use an auxiliary amalgam even in an amalgam type discharge lamp using a dispenser. Especially.

[0011]

In order to solve the above problems, the present invention provides a mercury dispenser for enclosing a certain amount of mercury in a bulb, and a metal disposed near the mercury dispenser and forming amalgam with the enclosed mercury. When mercury is enclosed in a discharge lamp including the above, the discharge lamp is turned on by an induction electromagnetic field to release the mercury in the mercury dispenser.

[0012]

Embodiment 1 FIG. 1 shows an embodiment of the present invention, in which the lamp is an electrodeless discharge lamp. In the figure, reference numeral 1 is a bulb-shaped bulb having one end opening, a fluorescent body 2 is applied to the inner wall of the bulb, and a glass stem 3 is sealed to the opening end. Reference numeral 4 is a support tube provided in advance on the stem 3.
Reference numeral 5 denotes a V-shaped metal supporting wire 5, the bent portion of which is inserted into the supporting tube 4, and a ring-shaped mercury dispenser 6 is attached to both ends. Reference numeral 7 is an amalgam metal fixed to the sealing portion of the valve 1 and the stem 3, and 8 is an auxiliary amalgam metal fixed to the support wire 5.

After exhausting the lamp thus constructed, the induction electromagnetic field generating device including the induction coil 9 and the high frequency oscillator 10 is turned on for several hours. That is, the neck of the bulb 1 is put in the induction coil 9 and a high-frequency current is supplied to the induction coil 9 to turn on the discharge lamp.

When the optical temperature characteristic of the lamp was measured after lighting for several hours, two peaks were formed as designed, and the interval between the two peaks was also as designed. This indicates that the mercury emitted from the dispenser 6 was dissolved in the amalgam metal when the lamp was turned on, and the mixing ratio was as designed, and the mercury vapor pressure could be controlled. Further, since the auxiliary amalgam 8 is not red-heated during the above lighting, it does not scatter as in the case of the conventional high frequency induction heating.

By adopting such a method, it was possible to provide a lamp using an auxiliary amalgam in an amalgam type discharge lamp using a dispenser.

[0016]

Embodiment 2 FIG. 2 shows a different embodiment of the present invention, and the lamp used is a general fluorescent lamp. In the figure, reference numeral 1 is a straight tube-shaped bulb, a fluorescent body 2 is applied to the inner wall of the bulb, and a glass stem 3 is sealed at the open end thereof. The stem 3 has a metal support wire 5 and an introduction wire 11 in advance.
Is attached. Filament 1 in the lead-in wire 11
2 is attached, and a dispenser 6 is attached to the tip of the metal supporting wire 5. Reference numeral 7 is an amalgam metal fixed to the sealing portion of the valve 1 and the stem 3, and 8 is an auxiliary amalgam metal fixed to the support wire 5. The auxiliary amalgam metal 8 may be fixed to the introduction line 11 as long as it is placed in a place where the temperature becomes high immediately after the lamp is turned on.

After exhausting the thus constructed lamp, the bulb 1 is inserted into the induction coil 9 in the same manner as in the above embodiment.
Then, the discharge lamp is lit for several hours by supplying a high frequency current to the induction coil 9.

When the lamp is turned on for several hours, all the mercury is released from the dispenser 6 and dissolves in the amalgam metal, and the mixing ratio is as designed, and the discharge lamp operates as an optimum amalgam type discharge lamp. In addition, since the auxiliary amalgam 8 is not red-heated during the above lighting, it does not scatter.

[0019]

As described above, the present invention provides a discharge comprising a mercury dispenser for enclosing a certain amount of mercury in a bulb, and a metal disposed near the mercury dispenser and forming mercury and an amalgam. In the enclosure of mercury in the lamp, since the mercury in the mercury dispenser is released by lighting the discharge lamp with an induction electromagnetic field, it is possible to use an auxiliary amalgam even in an amalgam type discharge lamp using a dispenser. it can.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view of a partial cross section showing a different embodiment of the present invention.

[Explanation of symbols]

 1 Valve 2 Fluorescent Body 3 Stem 4 Support Tube 5 Metal Support Wire 6 Dispenser 7 Amalgam Metal 8 Auxiliary Amalgam Metal 9 Induction Coil 10 High Frequency Oscillator 11 Introductory Wire 12 Filament

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] September 2, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

Generally, a dispenser in which a certain amount of mercury is melted is enclosed in a bulb, and after the lamp is evacuated, the dispenser is red-heated by high frequency induction heating to release the mercury, thereby enclosing a certain amount of mercury. That is, amateur
Use a dispenser in a rugam type discharge lamp
If the dispenser is ring-shaped, enclose the stem
It is generally attached to a wire or support wire and enclosed.
In addition, when using an auxiliary amalgam, the lamp should be turned on directly.
Stem enclosing line or supporting line as a place where it will become hot later
It is generally attached to.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction content]

[0008]

By the way, when an auxiliary amalgam is used in the amalgam type discharge lamp using the dispenser as described above , two stems are used.
For straight tube discharge lamps that are sealed in different locations, the
Sensor and auxiliary amalgam on separate stems
You can However, only one stem is used.
In the case of an electric lamp (for example, an electrodeless discharge lamp), an auxiliary amalgam is arranged near the mercury dispenser.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction content]

When the lamp is turned on for several hours, all the mercury is released from the dispenser 6 and dissolves in the amalgam metal, and the mixing ratio is as designed, and the discharge lamp operates as an optimum amalgam type discharge lamp. In addition , since the auxiliary amalgam 8 is not red-heated during the above lighting, it does not scatter.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0019

[Correction method] Change

[Correction content]

[0019]

As described above, the present invention provides a discharge comprising a mercury dispenser for enclosing a certain amount of mercury in a bulb, and a metal disposed near the mercury dispenser and forming mercury and an amalgam. Since the mercury in the mercury dispenser is discharged by turning on the discharge lamp by an induction electromagnetic field in the mercury filling in the lamp, a dispenser is used .
Auxiliary amalgam can be used even in an amalgam type discharge lamp with one system.

Claims (1)

[Claims] 1. Encapsulation of mercury in a discharge lamp comprising a mercury dispenser for enclosing a certain amount of mercury in a bulb, and mercury enclosed in the vicinity of the mercury dispenser and a metal forming an amalgam. A method of enclosing mercury in a discharge lamp, characterized in that the discharge lamp is turned on by an induction electromagnetic field to release the mercury in the mercury dispenser.