JPS603847A - Low-pressure mercury lamp - Google Patents

Abstract

PURPOSE:To obtain a low-pressure mercury lamp with high efficiency and a high output by properly selecting the shape, size and seal gas of the lamp. CONSTITUTION:A discharge tube made of quartz glass or ultraviolet ray transparent glass has a discharge area section 1 and an electrode storage section 2, a tungsten filament coated with an electron emitting material is fitted in the electrode storage section 2 as an electrode 3 and rare gas is sealed in the tube together with excessive mercury, and the electric current is fed from an external power supply through a lead wire 4. In this lamp, the emission efficiency of 70% or more at maximum can be obtained by properly selecting the ratio of the mixed gas of argon and neon sealed as cooling gas and also making the ratio B/A between the tube diameter A of the electrode storage section of the lamp and the tube diameter B of the discharge area section within 0.5-0.8.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a low-pressure mercury lamp with a high U'' cathode, in which mercury and a rare gas are sealed in a discharge tube which has a discharge region having a tube diameter different from that of an electrode storage portion.

Conventionally, low-pressure mercury lamps have been commercially available as sterilizing wraps with a power per unit length (hereinafter referred to as load) of less than LW/cya.
This temperature is designed to maintain a gastric wall temperature of approximately 40"C, at which the injection efficiency of the 254 nm water phase resonance line (#1 radiation) is stable. Even if it is more expensive,
Even if it is low, the night light efficiency of the Sesmoe line will decrease.

The conventional sterilization lamp has a low 1η of t-cell germicidal line 61
The strength of the agent is low, and the food industry, resin industry, etc. require high-speed processing.
It's J).

Recently, a low-pressure mercury lamp with a high load has dropped to 4fQ.
ing. For example, in Japanese Patent Publication No. 57-54908, 7i:
':j J' lamp has l KW power (load approx. 6
＼■／I藷] lights up the tri bit. The lamp structure has a U-shaped discharge tube, and the cathode and anode sections at both ends are separated from the discharge tube and are filled with gas (mercury, rare gases), and are specially devised to prevent IL gas from being introduced. It is characterized by the fact that it is connected by two pipes.

Although the radiation intensity of germicidal radiation is powerful, the drawback is that the 711M site is complex and expensive.

The present inventor has repeatedly conducted experiments on a method of increasing the output of a low-pressure water lamp, and has found that by appropriately selecting the shape of the lamp, the J method, and the filled gas, it can be achieved using a relatively open TTL and TT clamp structure. This is the second thing to find out.

Examples of the present invention will be described below. -Figure 1 shows the low water discharge dA of the present invention! It shows the 4171 structure of the lamp. The discharge tube is made of quartz glass that passes ultraviolet rays, 1 indicates the discharge area, 2 indicates the tube storage part of the discharge tube, and 8 indicates the quartz filament (electron emitter). The ViT is filled with excess mercury and a rare gas, and is powered by an external power source !jiiv!t using the lead wire 4.

V142 diagram shows arc length 50C#1. Heavy enclosure storage pipe diameter 2m
.

lfi tun area pipe diameter 1. 'l crtr and r first
The discharge wKil with the structure shown in the figure is filled with argon and a mixed gas of neosium and argon as a rare gas in addition to mercury.
Shows the radiation efficiency of the lethal radiation at points f, I L, f knee at 50 W °t (i power.

Curve a shows the case where a mixed gas of No. 99.5% and Ar Q, 5% is filled in, and the curve 2 shows the case where 8r is filled in.

When a mixed gas of Ne and Ar is sealed, soft electricity starts due to the Benizig effect.[It has the advantage of being able to lower I-E.] 11 to curve a
(When the power is 8 Torr, it kills mIJ! Radiation efficiency is /Ii large, 0.5~03'I'arr I)
Range [/l ”QAt maximum value 07036 or more.

In t-, the efficiency is 11 points lower than in this river) J υ11.

The scum used in conventional germicidal lamps is generally At, but in the same shape of wrap, it is 9'l'orr as shown in curve ib.
When compared to the Ne99.5-ΔrO,5 mixed gas, a radiation efficiency of only about 50 was obtained. A
, increase efficiency by setting only y to 10 and insert PC into LE.
It is necessary to lower the power to less than l'll'orr, and there are drawbacks such as a higher starting pressure and a shorter lamp life.

In addition, if the mixing ratio of Ar in the Ne1-Ar mixture is increased, the radiation efficiency of germicidal radiation will gradually increase. It has been found that less than 50% is appropriate. Figure 518 shows the sealing pressure 3
Figure 3 shows the change in radiation efficiency at Torr. The higher the ratio of NO, the higher the radiation 911 will be.No 5c1'
The maximum value is 70% at a ratio of 46-Ar 50%.

Low-pressure water line lamps accept changes in sterilization efficiency depending on the structure of the lamp. Inside the tube, there is mercury as well as Ne.
99. 8'l of fi%-Ar O, 5% mixed gas
'l) r r When the power is 260W, the maximum value is reached when II/A is 0.6, and the value is 0.
．． In the range 1/+1 of 6 to 0.8, the radiation efficiency of 70% or more of the radiation f1α is
A heron? ! Similar results were obtained with pigeon coops with different diameters/13
['It turns out that the caliber ratio of 13/A with 11 parts can be properly calculated (: From this, it turns out that the iris efficiency r II output of 11 (Kassuisen lamp) can be obtained.

The Q%5 diagram has an arc length of 50ClfflTT! : Increase the tube diameter of the IM storage compartment to 2 cmliX'! Fr f% of the 4th region
is 1.2 cm, and the mercury and Ne-Ar mixed scum is 3 cm.
16 and 7 in Figure 1 in the Tarr enclosure.
Seal 1 from 1i garden. The radiation efficiency of germicidal rays is shown when the distance 4 to the respiratory part is varied. When e is 8m, the maximum and t(
Actual tests have shown that the mackerel efficiency is more than 70% at heights of 5 to 10 cm, and further decreases at other times.

As described above, the present invention provides a high-output, low-[j] trimercury lamp in an inexpensive manner by devising the shape of the stomach and the sealed gas, and is useful for sterilizing and dehydrating food products. ;For industrial use such as finger hardness 43, the actual value of 111 is extremely high.

One embodiment of the present invention concerns a straight tube-shaped lamp.
Even if the shape of the discharge part is processed into a U-tube shape or a spiral shape, an effect similar to that of 1 m can be obtained.

[Brief explanation of the drawing]

Figure 1 shows an embodiment of the low-pressure water armor lamp of the present invention. Figure 8 shows the relative radiation efficiency of one ray of Kotoki's killing mark using ion and argon as rare waste, and Figure 4 shows the relative radiation efficiency of one line of killing mark of fkotoki, and Figure 4 shows the electrode storage. A diagram showing the relationship between the tube diameter ratio of the area and the discharge area, and the 111 radiation efficiency of the 111 radiation of the ion beam +'+M ray,
FIG. 51 is a diagram showing the relationship between ill and l of the relative radiation efficiency of germicidal radiation and the rear length of the electrode. 1...discharge area, 2...? [Polar aperture Files 18... Electrode, 4...
Lead.婢 1 I Ar tan θ θ 吟−□−−□−−□−−1m Ne-filled tfx r' 2 Tomoe 7f Sri (g#tH1) 〉 4 ■ Confession now Fhi (Fs/7+1) 15 □□ □ Chemi-barber, 1 (c-) ”-・Spring;”N:ntli j”,Fll (spontaneous) 1
, 'nli display Showa;)8i1:4''jmu' Page 1, line 5 [to I/same 10 #Irl
I' 47: Fill out the column '1 Claims' as follows: i
1 Correct. 1 fT't' f￥Δ of electrode storage part and tube diameter of light emitting part 13
The ratio = s-= +3/A to 0.5 and 0.8, and the distance from the Ichigokuhitomoro to the end of the moon 11 to 5 to 10 cm. Neon gas at a mixing ratio of 5 (196 J) with mercury and 0.5
Low II water plane run characterized by ~10For+・ range cJJ person(] -1,,0 (2) Correct Figure 5 of Attachment A1 drawing as shown in the attached sheet. 7. Attachment p; Corrected inventory drawing of the species (Fig. 5) 1 copy l/hu-℃- Name 5 7 θ 5 lρ 15 Shadow bale gFJ old time, l (tiger) -23 (

Claims (1)

[Claims] Ratio B/A of the tube diameter A of the TtL private collection part and the a diameter B of the light emitting part
is set to 0.5 to 0.8, the distance 1111 from the tip of the IIE pole to the sealing end is grooved to 5 to lQcm, and neon gas with a mixing ratio of mercury and argon of less than 50% is placed within one tube. The Narita mercury lamp is waiting for the heat sealed with auto+ of 0.5 to jQ Torr.