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CN-122000269-A - High-power ultraviolet lamp and ultraviolet device

CN122000269ACN 122000269 ACN122000269 ACN 122000269ACN-122000269-A

Abstract

The invention relates to the field of ultraviolet devices, and particularly discloses a high-power ultraviolet lamp and an ultraviolet device. The high-power ultraviolet lamp comprises a discharge cavity and an amalgam accommodating cavity, wherein the amalgam accommodating cavity is connected to one end of the discharge cavity, an amalgam is arranged In the amalgam accommodating cavity, a filament is arranged In the discharge cavity, the inner diameter of the discharge cavity is more than or equal to 27mm, the current density of the discharge cavity is more than or equal to 0.7A/cm 2 , the amalgam is an alloy containing In, zn and Hg, the weight ratio of In, zn and Hg is a, b, C, a, b and C accords with the following relation that 7<a/C is less than or equal to 12,0.6 b/C is less than or equal to 1.5, and the T 95 of the amalgam is more than or equal to 25 ℃. By implementing the invention, the high-power ultraviolet lamp with high conversion efficiency, strong stability and strong environment adaptability can be obtained.

Inventors

  • HE ZHIMING
  • FU ZHIMIN
  • Qu Yingchu
  • WANG JUNHUA
  • HE KEYU

Assignees

  • 佛山柯维光电股份有限公司

Dates

Publication Date
20260508
Application Date
20251210

Claims (14)

  1. 1. The high-power ultraviolet lamp comprises a discharge cavity and an amalgam accommodating cavity, wherein the amalgam accommodating cavity is connected to one end of the discharge cavity, the amalgam accommodating cavity is internally provided with an amalgam, and a filament is arranged in the discharge cavity, and the high-power ultraviolet lamp is characterized in that the inner diameter of the discharge cavity is more than or equal to 27mm, and the current density of the discharge cavity is more than or equal to 0.7A/cm 2 ; the amalgam is an alloy containing In, zn and Hg, the weight ratio of the In, zn and Hg is a, b and c, and the a, b and c are In accordance with the following relation that 7<a/c is less than 12,0.6 and less than or equal to b/c is less than 1.5; The amalgam has a temperature T 95 not less than 25 ℃, wherein T 95 is calculated according to the formula: in the formula, For the effective operating temperature range of the amalgam, Respectively the minimum temperature and the maximum temperature of the amalgam when the ultraviolet output of the high-power ultraviolet lamp at 254nm at the initial stage of life continuously fluctuates from 95 percent to 100 percent, The minimum temperature and the maximum temperature of the amalgam when the ultraviolet output of the high-power ultraviolet lamp at 254nm continuously fluctuates from 95% to 100% in the later period of service life are respectively.
  2. 2. The high power ultraviolet radiation lamp defined In claim 1, wherein the amalgam is an In, zn, hg alloy and a, b, c satisfy the relationship 8. Ltoreq.a/c <12,0.6. Ltoreq.b/c. Ltoreq.1.2.
  3. 3. The high power ultraviolet radiation lamp defined In claim 1, wherein the amalgam is an In, zn, hg alloy and a, b, c satisfy the relationship 9. Ltoreq.a/c≤ 11.8,0.65. Ltoreq.b/c≤1.1.
  4. 4. The high power ultraviolet lamp as recited in any one of claims 1-3, wherein the initial life is any time that is the first 1% of the life of the high power ultraviolet lamp; the end-of-life is the moment when about 20wt% of the Hg in the amalgam is lost.
  5. 5. A high power ultraviolet radiation lamp according to any one of claims 1-3, wherein the distance between the amalgam and the filament is 30-100 mm.
  6. 6. The high power ultraviolet lamp as set forth in claim 1, wherein the inner diameter of the discharge chamber is 27-33 mm, the current density is 0.8-1.15A/cm 2 , the distance between the amalgam and the filament is 40-100 mm, or The inner diameter of the discharge cavity is 33-36 mm, the current density is 0.7-0.95A/cm 2 , the distance between the amalgam and the filament is 30-80 mm, or The inner diameter of the discharge cavity is 36-40 mm, the current density is 0.7-0.9A/cm 2 , and the distance between the amalgam and the filament is 30-80 mm.
  7. 7. The high power ultraviolet lamp as set forth in claim 1, wherein the inner diameter of the discharge chamber is 27-33 mm, the current density is 0.8-1.1A/cm 2 , the distance between the amalgam and the filament is 60-75 mm, or The inner diameter of the discharge cavity is 33-36 mm, the current density is 0.75-0.95A/cm 2 , the distance between the amalgam and the filament is 50-65 mm, or The inner diameter of the discharge cavity is 36-40 mm, the current density is 0.7-0.9A/cm 2 , and the distance between the amalgam and the filament is 30-55 mm.
  8. 8. The high power ultraviolet radiation lamp defined In claim 1, wherein the amalgam is an In, zn, hg alloy; The inner diameter of the discharge cavity is 27-33 mm, the current density is 0.8-1.15A/cm 2 , the distance between the amalgam and the filament is 40-100 mm, a/c is 9-12,0.6-b/c-1.35, or The inner diameter of the discharge cavity is 33-36 mm, the current density is 0.7-0.95A/cm 2 , the distance between the amalgam and the filament is 30-80 mm, a/c is more than or equal to 8 and less than or equal to 11.5,0.75 and b/c is more than or equal to 1.3, or The inner diameter of the discharge cavity is 36-40 mm, the current density is 0.7-0.9A/cm 2 , the distance between the amalgam and the filament is 30-80 mm, and the a/c is more than or equal to 7 and less than or equal to 10.5,0.9 and the b/c is more than or equal to 1.5.
  9. 9. The high power ultraviolet radiation lamp defined In claim 1, wherein the amalgam is an In, zn, hg alloy; The inner diameter of the discharge cavity is 27-33 mm, the current density is 0.8-1.15A/cm 2 , the distance between the amalgam and the filament is 60-75 mm, a/c is more than or equal to 9 and less than or equal to 11.8,0.65 and b/c is more than or equal to 1.1, or The inner diameter of the discharge cavity is 33-36 mm, the current density is 0.75-0.95A/cm 2 , the distance between the amalgam and the filament is 50-65 mm, a/c is more than or equal to 8 and less than or equal to 11,0.8 and b/c is more than or equal to 1.2, or The inner diameter of the discharge cavity is 36-40 mm, the current density is 0.7-0.9A/cm 2 , the distance between the amalgam and the filament is 30-55 mm, a/c is more than or equal to 7.5 and less than or equal to 10.5,0.9 and b/c is more than or equal to 1.4.
  10. 10. The high power ultraviolet radiation lamp defined in claim 1, further comprising a heating device in communication with the amalgam-containing chamber.
  11. 11. The high-power ultraviolet lamp according to claim 1, wherein the discharge cavity is sleeved with a heat-insulating sleeve, the inner diameter of the heat-insulating sleeve is 3-16 mm larger than the outer diameter of the discharge cavity, and the heat-insulating sleeve is connected with the discharge cavity in a sealing mode or in a non-sealing mode.
  12. 12. The high power ultraviolet lamp defined in claim 1, wherein the discharge chamber is filled with an inert gas selected from one or more of helium, neon, argon, krypton, and xenon.
  13. 13. The high power ultraviolet lamp defined in claim 12, wherein the discharge chamber is filled with a mixture of neon and argon, the volume ratio of neon to argon being greater than or equal to 4.
  14. 14. An ultraviolet device comprising the high power ultraviolet lamp of any one of claims 1-13.

Description

High-power ultraviolet lamp and ultraviolet device Technical Field The invention relates to the field of ultraviolet devices, in particular to a high-power ultraviolet lamp and an ultraviolet device. Background According to the prior art, in a fluorescent lamp with a diameter of 38mm (inner diameter of about 35 mm) and a lamp current of 0.425A (current density of 0.044A/cm 2), the light output reaches the maximum value (namely, the radiation of 254nm in the lamp reaches the maximum value) at the cold end temperature of 40 ℃, and the temperature range DeltaT 90 of continuous fluctuation of the light output from 90% to 100% is about 30 ℃ (30-60 ℃). The cold end temperature of 40 ℃ corresponds to a mercury vapor pressure of 0.8Pa in the lamp, which 0.8Pa is the optimum mercury vapor pressure P 0 for a fluorescent lamp with a diameter of 38mm (inner diameter of about 35 mm), and a lamp current of 0.425A. Ultraviolet lamp and fluorescent lamp belong to low-pressure mercury discharge lamp, the characteristic is similar, when the environmental condition changes, the temperature of liquid mercury or amalgam in the lamp changes, the mercury vapor pressure in the lamp changes, and the output efficiency and output power of 254nm change. With the development of high-power ultraviolet lamps, the lamp current density (the ratio of the lamp current to the internal sectional area) is increased to 5-20 times that of the conventional fluorescent lamp. In order to reduce the number of ultraviolet lamps, a high-power ultraviolet lamp with large pipe diameter and high current density is used for disinfecting and purifying water and air. The inventor stably controls the current of ultraviolet lamp with phi 38mm (inner diameter phi 35 mm) at 8A (current density is 0.832A/cm 2), uses liquid mercury lamp, changes mercury vapor pressure in the lamp by controlling and adjusting cold end temperature, and tests the ultraviolet output variation characteristic along with cold end temperature. The test shows that the ultraviolet output reaches the maximum value at the cold end temperature of about 41 ℃, the mercury vapor pressure corresponding to the temperature is the optimal mercury vapor pressure P 0, the 254nm ultraviolet output continuously fluctuates from 90% to 100% and the temperature range DeltaT 90 is about 7 ℃, and DeltaT 90 is greatly narrowed compared with the traditional fluorescent lamp with low lamp current density. The UV output was found to be about 50% of maximum when the cold side temperature was 30 ℃. The UV output was about 85% of maximum at a cold end temperature of 50℃and about 70% of maximum at a cold end temperature of 60 ℃. It can be seen that, when the tube current density is greatly increased for the large-tube-diameter low-pressure ultraviolet lamp, compared with the ultraviolet lamp with the same tube diameter and small current density, the required optimal mercury vapor pressure is shifted, the cold end temperature range deltat 90 of stable output is greatly reduced, that is, the ultraviolet output becomes extremely sensitive to fluctuation of the mercury vapor pressure, and slight change of the mercury vapor pressure can cause great change of 254nm output efficiency and output power, so that the ultraviolet is used for disinfection and ultraviolet advanced oxidation, and the attention is paid to the minimum value of the output power and output efficiency under the environmental condition. On the other hand, bi-In-Hg alloy is commonly used In ultraviolet lamps with larger pipe diameters (the inner diameter is more than or equal to 27 mm) and high current density at present, other metals are added In the Bi-In-Hg alloy, and the inventor shows that the ultraviolet output at 254nm is unstable and fluctuates greatly along with the change of environmental conditions according to the test results of phi 38mm and 8A ultraviolet lamps adopting the amalgam In the market. The current common improvement concept is to incorporate other metals into the alloy. For example, the prior art discloses that adding Zn, ni, ti, sn, au, ag, cu or other metals to Bi-In-Hg can solve the problem of amalgam adhesion, improve its fluidity, and also raise the melting temperature of the amalgam. However, the addition of these metals has a great influence on the mercury vapor pressure control performance of the amalgam and has little influence. The mercury vapor pressure control properties of amalgams are affected by many factors and are highly unpredictable. The addition of metals such as Ni and Ti to Bi-In-Hg alloy, in theory, ni and Ti will not form a compound with Hg at normal pressure, the decomposition temperature of the compound of Ni, ti and In is high, the compound is not In the working temperature range of the amalgam, and the performance of the amalgam for controlling mercury vapor pressure is difficult to improve. Sn is added into the Bi-In-Hg alloy, and the mercury vapor pressure characteristic of the amalgam is controlled t