JP2004342549A - Single base type fluorescent lamp, use of amalgam supercooling preventive material and wind shielding material, and method for preventing supercooling of amalgam of single base type fluorescent lamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a single base type fluorescent lamp 10, capable of preventing rapid deterioration of light flux due to supercooled amalgam, when arranged in an environment where ventilation lowers the temperature of amalgam. <P>SOLUTION: The single base type fluorescent lamp 10 comprises the amalgam 310, and a light emitting tube 300 having an amalgam arranging part 320 for arranging the amalgam 310. The amalgam is prevented from being supercooled by using silicone form covering at least a part of the amalgam arranging part 320 as a heat insulator. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single-necked fluorescent lamp (a hot-cathode low-pressure mercury vapor discharge lamp).
[0002]
[Prior art]
A bulb-type fluorescent lamp, which is a fluorescent lamp using Argammam, has an electronic circuit arranged inside a base. For this reason, the amalgam placement section where the arugamum is placed is unlikely to cause supercooling due to heat generated from the electronic circuit, and the temperature of the arugamum suddenly drops due to the environment of the fluorescent lamp installation location, so that the abrupt decrease in luminous flux does not occur. Did not occur.
[0003]
On the other hand, in a single-necked fluorescent lamp, amalgam is generally not used and the supercooling phenomenon does not occur. However, in the case of using amalgam, the argamam is housed in a chip tube inside the base, and no electronic circuit is arranged inside the base. In addition, since there is a gap between the arc tube and the base case, air flows into the amalgam container, or warm air escapes. For this reason, if the chip tube is rapidly cooled by cold air or wind while the lamp is on, the algamam temperature causes a supercooling decrease, which causes a sharp drop in the mercury vapor pressure. As a result, the brightness of the lamp rapidly decreases.
[0004]
[Patent Document 1]
JP-A-2002-298611 [0005]
[Problems to be solved by the invention]
As described above, when the brightness of the lamp suddenly becomes dark, a person using the lamp feels a decrease in illuminance, and a problem such as losing work occurs.
[0006]
Accordingly, it is an object of the present invention to prevent a rapid decrease in the luminous flux due to the supercooling of the argamam temperature.
[0007]
[Means for Solving the Problems]
A single-ended fluorescent lamp according to the present invention, amalgam,
An arc tube having an amalgam arrangement section for arranging the amalgam,
It is characterized by including at least one of a wind shield and a heat insulator covering at least a part of the amalgam arrangement portion.
[0008]
The single-base fluorescent lamp further includes a base cover for fixing the arc tube,
By filling at least one of a windshield and a heat insulating material in the gap between the base cover portion and the arc tube and / or the amalgam portion to suppress the flow of wind to the inside and outside of the base. I do.
[0009]
At least one of the wind shield and the heat insulator is a porous silicone resin.
[0010]
The single-capped fluorescent lamp is arranged in an environment where the amalgam temperature is reduced during lighting.
[0011]
The single-capped fluorescent lamp is arranged in an environment in which ventilation is performed for a maximum of 30 minutes during lighting and the condition of stopping ventilation is repeated for at least one minute, and the wind speed at the time of ventilation is 1.0 m / sec or more and 5.0 m / sec or less. It is characterized by being.
[0012]
The amalgam subcooling preventing material in the single-necked fluorescent lamp according to the present invention is characterized in that it comprises a porous silicone resin that covers at least a part of the amalgam arrangement portion where the amalgam is arranged.
[0013]
The use of at least one of the windshield and the heat insulating material according to the present invention is to prevent at least a part of the amalgam disposition portion to prevent supercooling of the amalgam disposed in the amalgam disposition portion of the single-necked fluorescent lamp. Characterized by the use of a wind shield material.
[0014]
A method for preventing supercooling of amalgam of a single-necked fluorescent lamp according to the present invention is characterized in that at least a part of an amalgam arrangement portion in which amalgam is arranged covers at least one of a windshield and a heat insulator. .
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiment 1 FIG.
FIG. 1 is a diagram illustrating an example of a single-base fluorescent lamp 10 according to the first embodiment.
The base unit 100 is a part for connecting the fluorescent lamp to the socket.
The base unit 100 includes a base 110 that connects the fluorescent lamp to the socket, and a case fitting portion 120 that fits with the base case 200. The base 110 is a part defined by the JIS standard.
The base case 200 connects the base unit 100 and the arc tube 300.
The arc tube 300 is a portion that fluoresces when a voltage is applied. Further, the arc tube 300 has an amalgam arrangement section 320 for enclosing the amalgam 310 and arranging the encapsulated amalgam 310. The amalgam 310 is an example of mercury amalgam.
[0016]
The pin 400 is a part that is inserted into the electrode of the socket and is electrically connected.
Foamed silicone (porous silicone resin) 500 is an example of a windshield and a heat insulator. As an example of the wind shield material and the heat insulating material, there is silicone. The wind shield material and the heat insulating material are materials that have an effect of keeping the heat of the amalgam placement section 320, and are limited to silicone as long as they are easily processed (materials that can be easily applied to the amalgam placement section 320 and its periphery). Absent. In this embodiment, foamed silicone, which is easy to process, has a windshield, and is excellent in heat retention, is used as silicone. The foamed silicone 500 is an example of a cover that covers the arc tube 300 and the like. The cover may be one of a windshield having a windshield function and a heat insulator having a heat insulation function, or may be a windshield insulation material having both functions.
The adhesive 600 adheres the arc tube 300 to the base case 200.
[0017]
FIG. 2 is a diagram showing the relationship between the temperature and the mercury vapor pressure in the case of liquid mercury and amalgam.
The point indicated by P1 on the vertical axis is the point of the mercury vapor pressure at which the illuminance of the fluorescent lamp is optimal.
T1, T2, T3, and T4 are symbols indicating points at a predetermined temperature. The temperature is the temperature of the arc tube in the case of liquid mercury, and the amalgam temperature in the case of amalgam. In amalgam, as the temperature increases, the mercury vapor pressure changes as shown by the solid line.
In FIG. 2, since the purpose is to explain the relationship between the mercury vapor pressure and the temperature, specific numerical values are not shown for P1 and T1 to T4. However, regarding the temperature, there is a relationship of T2 <T3 <T4.
FIG. 3 is a diagram showing an example of the relationship between temperature and illuminance in a fluorescent lamp using liquid mercury. FIG. 3 shows that the illuminance of the fluorescent lamp becomes 100% when the temperature is T1. 2 and 3, T1 is shown as the same value for ease of explanation.
[0018]
Illuminance varies depending on the mercury vapor pressure. Therefore, even in a fluorescent lamp using amalgam, when the value of the mercury vapor pressure is the same, the same illuminance as that of the liquid mercury shown in FIG. 3 can be obtained. From FIG. 2, the case where the temperature is T1 corresponds to the case where the mercury vapor pressure is P1. That is, the mercury vapor pressure at which 100% illuminance is obtained is P1, and this value can be said to be the same for liquid mercury and amalgam.
2 and 3, in the case of liquid mercury, the point where the mercury vapor pressure becomes P1 is when the temperature is T1, and 100% illuminance is obtained.
On the other hand, in amalgam, the point where the mercury vapor pressure becomes P1 is when the temperature is T4.
Further, as shown in FIG. 3, in the case of liquid mercury, the mercury vapor pressure rises with the temperature rise, so that when the temperature is T1, that is, when the mercury vapor pressure reaches the value of P1, the illuminance is lower. When the temperature rises above T1, that is, when the mercury vapor pressure exceeds P1, the illuminance gradually decreases. A fluorescent lamp using amalgam is suitable for a lamp whose luminous tube has a temperature higher than T1 during light emission.
[0019]
However, in the case of the fluorescent lamp using amalgam, when the temperature of the amalgam drops once after reaching the temperature T4 suitable for light emission (including the case where supercooling occurs), the temperature of T2 shown in FIG. It was found that the decrease to the value indicated by the dashed line. When the temperature is lower than T2, the mercury vapor pressure changes again in the same manner as the temperature increases. When the temperature decreases from T3 to T2, the mercury vapor pressure decreases significantly. Therefore, when the temperature decreases from T3 to T2 during lighting, the mercury vapor pressure decreases significantly with the temperature decrease, and a phenomenon occurs in which the illuminance decreases significantly. For this reason, when a phenomenon of supercooling that causes a temperature change from T3 to T2 during lighting occurs, it is necessary to prevent or suppress a decrease in temperature, that is, a decrease in mercury vapor pressure.
In particular, in the single-base fluorescent lamp 10 having no electronic circuit inside the base, there is a large problem when supercooling occurs because the electronic circuit does not provide a heat retaining effect.
[0020]
Therefore, as shown in FIG. 1, the periphery of the amalgam is filled with a heat insulating material to prevent supercooling, thereby preventing cold air from entering the lamp base or flowing out of the warm air and suppressing the occurrence of supercooling. By doing so, a significant decrease in illuminance due to supercooling is prevented and suppressed.
[0021]
FIG. 4 is a diagram illustrating an example of a usage example of the single-ended fluorescent lamp 10.
FIG. 4 shows an example in which the single-ended fluorescent lamp 10 is connected to a socket 920 of a lighting fixture attached to the ceiling 950. An exhaust duct 930 is arranged on the ceiling 950, and the air flows toward the exhaust duct 930.
For example, when a ventilation system such as a plenum return is adopted, there are places where air enters and exits a lighting fixture installed on an indoor ceiling strongly.
The umbrella portion 910 of the lighting fixture is attached to the ceiling 940. In the example of FIG. 4, the lighting fixture cover portion 910 and the lighting fixture socket 920 are not joined, and there is a gap between the lighting fixture cover portion 910 and the single-ended fluorescent lamp 10. The fluorescent lamp 10 is in a bare state. Therefore, as shown by the arrow, it indicates that the air is in the ventilation state. In addition, the ceiling 950 is also shown as being in a ventilation state (arrow).
In the case of the ventilation state, the base unit 100 of the single base fluorescent lamp 10 receives the wind from the space between the ceiling 950 and the gap 910 of the lighting fixture, and is in a state where the temperature can be lowered. In particular, the base unit 100 does not include an electronic circuit, and is likely to cause a temperature drop.
[0022]
In particular, when the installation place as shown in FIG. 4 is a place where outside air flows, a problem that the reduction of the amalgam temperature is inevitable. Therefore, it is necessary to keep the heat around the amalgam using a heat insulating material.
Further, in FIG. 4, the case where the amalgam temperature is reduced during lighting (during light emission) is described as an example in which a lamp is arranged in a ventilation environment, but the invention is not limited to this. For example, a case where a refrigerant or the like is installed in the vicinity of the amalgam arrangement section 320 may be considered. In addition, if the amalgam temperature decreases during lighting, a significant decrease in illuminance can be prevented by using a heat insulating material.
[0023]
As described above, a mercury amalgam supercooling preventing material (thermal insulation improving material) in the single-necked fluorescent lamp 10 including the foamed silicone covering at least a part of the amalgam disposing portion 320 in which the amalgam is disposed will be described. did.
Further, the use of a heat insulating material for at least a part of the amalgam placement section 320 to prevent the amalgam arranged in the amalgam placement section 320 of the single-base fluorescent lamp 10 from overcooling allows the single-base fluorescent lamp 10 to ventilate. When installed in a state, it is possible to prevent and suppress a significant decrease in illuminance due to a decrease in temperature.
Furthermore, by applying a method for preventing overcooling of the amalgam of the single-necked fluorescent lamp 10, characterized in that at least a portion of the amalgam placement section 320 where the amalgam is placed is covered with a heat insulating material, the illuminance due to overcooling is reduced. Significant reduction can be prevented and suppressed.
[0024]
Embodiment 2 FIG.
FIG. 5 is a diagram showing an example of a specific use. FIG. 5 is a doorway of a building where two automatic doors are installed, an outer doorway and an inner doorway.
The two automatic doors are installed to prevent outside air from directly entering the room. Assuming that a landing is between the two automatic doors, the single-dip fluorescent lamp 10 described in the first embodiment is installed at the landing. The installed environment is an environment in which the temperature of the single-necked fluorescent lamp 10 is liable to decrease as in the case of FIG.
Considering such a place, for example, in the case of commuting time during the winter season, there are many people, and the two automatic doors are often open at the same time. Therefore, outside air outside enters indoors, and the temperature is significantly reduced as compared with the case where one of the automatic doors is closed. In addition, the intensity of the wind is higher than when one of the automatic doors is closed, and the amalgam temperature is greatly reduced.
In such a case, when the one-piece-type fluorescent lamp 10 that does not take measures against cold air is used, the darkness of the illumination becomes remarkable depending on the person walking on the landing, causing inconvenience.
As shown in FIG. 5, in a place where air enters and exits greatly, in order to prevent and suppress supercooling of the amalgam temperature, by providing a heat insulating material in at least a part of the amalgam placement section 320, it is possible to prevent and suppress a decrease in illuminance. Becomes possible.
[0025]
In addition, as a result of the actual measurement, in the case where the air velocity was in a ventilation state at a wind speed of 1.0 m / sec to 5.0 m / sec for 30 minutes, the heat retaining effect of the foamed silicone continued. After that, when there was at least one minute of a period during which the ventilation state was stopped, the amalgam temperature recovered and the illuminance recovered.
[0026]
Embodiment 3 FIG.
In this embodiment, another example of measures against cold air (measure for keeping heat) for the lamp will be described.
FIG. 6 is a diagram showing another example of the countermeasure against cold air.
FIG. 6A shows an example in which foamed silicone is applied to the vicinity of the amalgam placement section 320 and the gap between the base case 200 and the arc tube 300.
FIG. 6B shows an example in which foamed silicone is applied around the amalgam placement section 320.
In FIG. 1, the example of FIG. 6A is shown. However, as shown in FIG. 6B, even when the amalgam placement section 320 is covered with the foamed silicone, the heat retaining effect is generated.
As shown in FIG. 6, by covering the amalgam placement section 320 of the amalgam with the heat insulating material, it is possible to prevent and suppress a decrease in the amalgam temperature, particularly, a sharp decrease in the amalgam temperature. Further, by filling the gap between the arc tube 300 and the base case 200 with a heat insulating material such as silicone as shown in FIG. 6A, the effect of preventing and suppressing amalgam temperature from being lowered is enhanced. This is because wind flowing from the gap between the arc tube 300 and the base case 200 can be prevented.
[0027]
Also, an example in which silicone is used as a heat insulating material has been described, but is not limited to silicone. Further, the silicone is preferably a foamed silicone. Foamed silicone is easy to apply to an object. Further, among the foamed silicones, foamed silicones whose volume expands 3 to 4 times are preferable. This is because, in the case of foamed silicone that expands three times (hereinafter, “foamed silicone that expands three times” is referred to as “three times foamed silicone”), large air bubbles are formed, so that the air layer becomes large and the heat insulation is maintained. This is because the effect is improved. Further, it has been found that the same effect can be obtained by using foamed silicone which expands three to four times instead of triple foamed silicone.
In addition, when comparing the three-fold foamed silicone with the foamed silicone that expands tenfold (hereinafter, “the foamed silicone that expands tenfold” is referred to as “10-fold foamed silicone”), the heat retention effect differs by about 10 ° C. (3 times foamed silicone is more preferred). This is thought to be because in the case of 10-fold foamed silicone, the formed air bubbles are small and the air layer is small, so that the heat retention effect is reduced. Also, when applied to an object, triple foamed silicone has less viscosity and is easier to handle than 10 times foamed silicone.
Although the effect of preventing the temperature from lowering is also produced by the adhesive 600, the effect of preventing the temperature from lowering is higher in the foamed silicone than in the adhesive 600 by forming an air layer.
[0028]
FIG. 7 is a diagram illustrating an example in which a lighting device is provided with a countermeasure against cold air.
In addition, as shown in FIG. 7, it is possible to suppress a decrease in the amalgam temperature by covering the light fixture 910 with the cover 960 so that the wind does not enter.
The cover 960 is covered with a material that does not reduce illuminance. For example, it is possible to cover with glass or the like. By covering the cover 960 in this manner, it is possible to prevent and suppress a decrease in the temperature inside the bulk portion 910 of the lighting fixture. As an example of the experimental results, 90% of the wind could be prevented by applying the cover 960. However, other than such a device, a countermeasure must be taken with a lamp.
[0029]
【Example】
Embodiment 1 FIG.
FIG. 8 is a diagram illustrating an example of an experimental environment in which a simulated ceiling was created and a change in illuminance was measured when the one-necked fluorescent lamp 10 was used in a ventilation state.
FIG. 9 is a diagram illustrating a result of measuring the illuminance using the experimental environment of FIG.
8, the components denoted by the same reference numerals as those in FIG. 4 have the same functions as those in FIG.
The numerical value shown with the arrow is the length (the unit is mm: millimeter).
The illuminance was measured by the illuminance measuring device by detecting the brightness at the light receiving section.
FIG. 8 shows an example in which two single base fluorescent lamps 10 are installed.
[0030]
The following three types of lamps (1) to (3) were used as the fluorescent lamps used in the experiment.
(1) A one-necked fluorescent lamp using amalgam, which has not been subjected to a heat retaining treatment ("Amalgam Type" in FIG. 9).
(2) A single-base fluorescent lamp using liquid mercury, which has an electronic circuit in the base unit (“liquid mercury type” in FIG. 9).
(3) A one-piece fluorescent lamp using amalgam, which has been subjected to a heat treatment with foamed silicone ("Amalgam cold air countermeasure type" in FIG. 9).
FIG. 9 shows the results of measuring the change in the illuminance of each of the fluorescent lamps (1) to (3). The experiment was performed in the case where the outside air was at 20 ° C. in a windless state. The ventilation state was 1.0 to 5.0 m / sec.
In FIG. 9, the ventilation state was maintained between 0.0 minutes and 30.0 minutes on the horizontal axis.
In addition, the lamps of (1) to (3) do not enter the ventilation state before the time of 0.0 minutes, maintain the illuminance in an appropriate state, and then generate the ventilation state. I have.
FIG. 9 shows the results of each of the above (1) to (3).
[0031]
In the lamp of the above (1), the illuminance was remarkably reduced with the start of the ventilation state.
In the lamp of the above (2), a predetermined illuminance was maintained even after the start of the ventilation state because the portion of the electronic circuit provided in the base unit had a heat retaining effect.
In the lamp of the above (3), the predetermined illuminance was maintained even after the start of the ventilation state due to the heat retaining effect of the foamed silicone.
From the results in FIG. 9, it can be said that the heat retention by the foamed silicone is effective. The effect is the same as that of the lamp of (2). By applying the foamed silicone to the amalgam placement section 320, the same effect as the heat generated when the base unit has an electronic circuit is obtained.
In the case of a ventilation state for 30 minutes, a predetermined illuminance is maintained. In the lamp of the above (1), after the ventilation state is stopped (after 30.0 minutes), the illuminance is recovered in about 1 minute, so that the ventilation state is within 30 minutes and at least 1 minute ( It has been found that when there is no wind for 3 minutes, the illuminance can be recovered.
[0032]
【The invention's effect】
It is possible to prevent and suppress a decrease in illuminance due to a drop in the amalgam temperature, particularly a sudden drop.
Further, it is possible to prevent and suppress a sharp decrease in the illuminance of the lamp that occurs when the single-necked fluorescent lamp is used in a ventilation environment.
[Brief description of the drawings]
FIG. 1 is a diagram showing an example of a single-base fluorescent lamp 10 according to a first embodiment.
FIG. 2 is a diagram showing the relationship between temperature and mercury vapor pressure in the case of liquid mercury and amalgam.
FIG. 3 is a diagram showing an example of the relationship between temperature and illuminance in a fluorescent lamp using liquid mercury.
FIG. 4 is a diagram showing an example of a usage example of the single-necked fluorescent lamp 10;
FIG. 5 is a diagram showing an example of a specific use.
FIG. 6 is a diagram showing another example of a countermeasure against cold air.
FIG. 7 is a diagram showing an example in which a lighting device is provided with a countermeasure against cold air.
FIG. 8 is a diagram illustrating an example of an experimental environment in which a simulated ceiling was created and a change in illuminance was measured when the one-necked fluorescent lamp 10 was used in a ventilation state.
FIG. 9 is a diagram illustrating a result of measuring illuminance using the experimental environment of FIG. 8;
[Explanation of symbols]
10 Single-base fluorescent lamp, 100 base unit, 110 base, 200 base case, 300 arc tube, 310 amalgam, 320 amalgam arrangement part, 400 pins, 500 foamed silicone, 600 adhesive, 910 bulk, 920 socket, 930 exhaust Duct, 940 ceiling, 950 ceiling.

Claims (8)

With amalgam
An arc tube having an amalgam arrangement section for arranging the amalgam,
A single-necked fluorescent lamp comprising at least one of a wind shield and a heat insulator covering at least a part of the amalgam arrangement portion. The single-base fluorescent lamp further includes a base cover for fixing the arc tube,
The joint portion between the base cover and the arc tube is filled with at least one of a windshield and a heat insulating material to suppress the flow of wind between the inside and the outside of the base. One-sided fluorescent lamp. 3. The single-necked fluorescent lamp according to claim 1, wherein at least one of the wind shield and the heat insulator is a porous silicone resin. The one-piece fluorescent lamp according to any one of claims 1 to 3, wherein the one-piece fluorescent lamp is arranged in an environment where amalgam temperature is reduced during lighting. The single-necked fluorescent lamp is placed in an environment in which ventilation is performed for a maximum of 30 minutes during lighting, and the condition of stopping ventilation is repeated for at least one minute, and the wind speed at the time of ventilation is 1.0 m / sec or more and 5.0 m / sec or less. The single-capped fluorescent lamp according to any one of claims 1 to 4, wherein: A material for preventing supercooling of amalgam in a single-necked fluorescent lamp, comprising a porous silicone-based resin covering at least a part of an amalgam-arranged portion on which amalgam is arranged. Use of a windshield for at least a part of the amalgam placement part to prevent supercooling of the amalgam placed in the amalgam placement part of the single-ended fluorescent lamp. A method for preventing supercooling of amalgam of a single-necked fluorescent lamp, characterized in that at least a part of an amalgam arrangement portion in which amalgam is arranged is covered with at least one of a wind shield and a heat insulating material.

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